[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "1"]
[White "Donner, Jan-Hein"]
[Black "Marovic, Drazen"]
[Result "1/2-1/2"]
[PlyCount "36"]

1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. cxd5 exd5 6. Bg5 c6 7. e3 Nbd7 8.
Qc2 O-O 9. Bd3 Re8 10. O-O Nf8 11. Rab1 a5 12. a3 Ne4 13. Bxe7 Qxe7 14. b4 Bf5
15. Rb3 axb4 16. axb4 Ng6 17. b5 Bg4 18. Ne1 Bd7 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "1"]
[White "Ivkov, Borislav"]
[Black "Zuidema, Coen"]
[Result "1-0"]
[PlyCount "45"]

1. c4 Nf6 2. Nc3 e5 3. g3 Bb4 4. Bg2 O-O 5. d3 Re8 6. Bd2 c6 7. Nf3 h6 8. O-O
Bf8 9. e4 d6 10. d4 Bg4 11. d5 cxd5 12. cxd5 b5 13. Re1 a6 14. h3 Bxf3 15. Qxf3
Nbd7 16. Bf1 Qb8 17. b4 Rc8 18. a4 bxa4 19. Rxa4 Nb6 20. Rxa6 Nc4 21. Bxc4 Rxc4
22. b5 Rxa6 23. bxa6 1-0

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "1"]
[White "Jongsma, Lex"]
[Black "Bronstein, David I"]
[Result "1/2-1/2"]
[PlyCount "82"]

1. e4 c6 2. d3 e5 3. f4 exf4 4. Bxf4 d5 5. Nd2 Qf6 6. Bg3 Qxb2 7. Ngf3 Nf6 8.
Be5 Qa3 9. Bxf6 gxf6 10. Be2 dxe4 11. Nxe4 Bg7 12. O-O f5 13. Ng3 f4 14. Ne4
O-O 15. d4 Bf5 16. Nf2 c5 17. Rb1 Nc6 18. Rb3 Qxa2 19. Rxb7 Rad8 20. Bd3 Bg6
21. dxc5 a5 22. Qb1 Qxb1 23. Rfxb1 a4 24. R1b6 a3 25. Rxc6 a2 26. Ra6 Ra8 27.
Rba7 a1=Q+ 28. Rxa1 Bxa1 29. Rxa8 Rxa8 30. Nh3 Rc8 31. Nxf4 Rxc5 32. Nxg6 hxg6
33. Kf2 f5 34. Ke3 Kg7 35. h3 Kf6 36. g4 Bc3 37. gxf5 gxf5 38. Nh4 Re5+ 39. Kf3
Kg5 40. Nxf5 Rxf5+ 41. Bxf5 Kxf5 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "1"]
[White "Kavalek, Lubomir"]
[Black "Ciric, Dragoljub M"]
[Result "1/2-1/2"]
[PlyCount "31"]

1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. cxd5 cxd5 5. Nc3 Nc6 6. Bf4 Bf5 7. e3 e6 8. Bb5
Nd7 9. O-O Be7 10. Re1 O-O 11. e4 dxe4 12. Nxe4 Qb6 13. Nc3 Bb4 14. Bxc6 bxc6
15. Nh4 Qa5 16. Re3 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "1"]
[White "Kuijpers, Frans"]
[Black "Kotov, Alexander"]
[Result "1-0"]
[PlyCount "65"]

1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. f4 Nc6 5. Be3 Nf6 6. Be2 O-O 7. Nf3 Bg4 8. O-O
Nd7 9. h3 Bxf3 10. Rxf3 e5 11. dxe5 dxe5 12. f5 Nd4 13. Rf2 c6 14. Qd2 b5 15.
Raf1 Nf6 16. Bd3 Qd7 17. Ne2 Nh5 18. Rd1 Rfd8 19. c3 Nxe2+ 20. Qxe2 Nf4 21. Qf1
Bh6 22. Bc2 Qe7 23. Rxd8+ Rxd8 24. Rf3 Kh8 25. Kh2 Bg5 26. fxg6 fxg6 27. g3 Ne6
28. Rf7 Qd6 29. Bb3 Be7 30. h4 Re8 31. Rf6 Rf8 32. Rxf8+ Bxf8 33. Qf7 1-0

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "1"]
[White "Langeweg, Kick"]
[Black "Bouwmeester, Hans"]
[Result "1/2-1/2"]
[PlyCount "46"]

1. c4 e6 2. Nf3 Nf6 3. b3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. Bb2 O-O 8. Nc3
d5 9. e3 Nc6 10. d3 Rc8 11. Qe2 Rc7 12. Rfd1 Rd7 13. cxd5 Nxd5 14. Nxd5 Rxd5
15. d4 Rd7 16. dxc5 Bxc5 17. Ne5 Nxe5 18. Bxb7 Nd3 19. Bc3 Rxb7 20. Rxd3 Qc8
21. b4 Be7 22. Qg4 e5 23. Qe4 f6 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "1"]
[White "Lengyel, Levente"]
[Black "Bilek, Istvan"]
[Result "1/2-1/2"]
[PlyCount "39"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 Ne4 8. Nxe4
Bxe4 9. Ne1 Bxg2 10. Nxg2 d5 11. Qa4 c5 12. Be3 cxd4 13. Bxd4 dxc4 14. Qxc4 Qc8
15. Rac1 Qxc4 16. Rxc4 Rd8 17. Rfc1 Nd7 18. Ne3 Kf8 19. R1c2 Bf6 20. Kf1
1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "1"]
[White "Shamkovich, Leonid"]
[Black "Ree, Hans"]
[Result "1/2-1/2"]
[PlyCount "117"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 b6 7. O-O Bb7 8. a3
Be7 9. cxd5 exd5 10. Ne5 c5 11. Qf3 Nc6 12. Qh3 g6 13. Bd2 Nxe5 14. dxe5 Ne4
15. Rad1 Qc8 16. Qxc8 Raxc8 17. Nxe4 dxe4 18. Bc4 Rfd8 19. Bc3 Kf8 20. f4 exf3
21. gxf3 Bc6 22. e4 b5 23. Bd5 b4 24. Bd2 Bb5 25. Bh6+ Ke8 26. Rf2 bxa3 27.
bxa3 c4 28. Rb1 a6 29. Ra2 c3 30. Rc1 Bc4 31. Bxc4 Rxc4 32. Be3 Rb8 33. Rcc2
Rb5 34. Kf2 Rxe5 35. Ke2 Ra5 36. Kd3 Rc8 37. Bd4 Rxa3 38. Rxa3 Bxa3 39. Bxc3
Rc6 40. Ra2 Bd6 41. h3 Bf4 42. e5 Kd7 43. Bd4 Ke6 44. Ke4 Bg5 45. Rb2 Bd8 46.
Rb8 Bc7 47. Re8+ Kd7 48. Rf8 Ke7 49. Ra8 a5 50. Kd5 Rc1 51. Bc5+ Kd7 52. Rf8
Rd1+ 53. Kc4 Bxe5 54. Rxf7+ Kc6 55. Be3 Rd7 56. Rf8 Bc7 57. f4 Re7 58. Bd4 Re4
59. Rf6+ 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "2"]
[White "Bilek, Istvan"]
[Black "Jongsma, Lex"]
[Result "1/2-1/2"]
[PlyCount "68"]

1. g3 d5 2. Bg2 c6 3. f4 g6 4. Nf3 Bg7 5. d3 Nf6 6. O-O O-O 7. Nc3 Na6 8. e3
Nc5 9. Qe2 a5 10. Bd2 Bg4 11. h3 Bxf3 12. Bxf3 d4 13. Nd1 dxe3 14. Bxe3 Ne6 15.
c3 Nd5 16. d4 a4 17. a3 Qd7 18. Kh2 Rac8 19. Bg2 f5 20. Bg1 Qd6 21. Ne3 Nxe3
22. Bxe3 h5 23. Rae1 Nc7 24. Bc1 Rf7 25. Qc4 Ra8 26. Re2 Nd5 27. Rfe1 Bf6 28.
Re6 Qd7 29. Bf3 Kg7 30. Qc5 Nc7 31. R6e2 e6 32. Qc4 Re7 33. Bd2 Nd5 34. Qd3 b5
1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "2"]
[White "Bouwmeester, Hans"]
[Black "Shamkovich, Leonid"]
[Result "0-1"]
[PlyCount "80"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Nf3 b6 6. Bd3 Bb7 7. O-O Bxc3 8. bxc3
Be4 9. Be2 Nc6 10. Ne1 O-O 11. f3 Bg6 12. Nd3 Rc8 13. Nf4 Na5 14. d5 e5 15.
Nxg6 hxg6 16. e4 Ne8 17. Bd3 Nd6 18. Qe2 Re8 19. Bd2 f5 20. g3 Qf6 21. Rae1 Re7
22. h4 f4 23. gxf4 exf4 24. e5 Qxh4 25. Qh2 Qxh2+ 26. Kxh2 Ndxc4 27. Bxf4 Rf8
28. Kg3 g5 29. Bxg5 Rxe5 30. Rxe5 Nxe5 31. Be4 Nac4 32. Rh1 Nd6 33. Bh7+ Kf7
34. Bc2 Re8 35. Rh4 c4 36. Rf4+ Kg8 37. Rh4 Nd3 38. Rh2 Nf5+ 39. Kh3 Re5 40. f4
Rxd5 0-1

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "2"]
[White "Ciric, Dragoljub M"]
[Black "Kuijpers, Frans"]
[Result "1-0"]
[PlyCount "59"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3
O-O 9. h3 h6 10. d4 Re8 11. Nbd2 Bf8 12. Nf1 Bb7 13. Ng3 Na5 14. Bc2 Nc4 15.
Bd3 Nb6 16. Bd2 c5 17. d5 Bc8 18. Nh2 Ra7 19. b3 g6 20. c4 Bd7 21. f4 bxc4 22.
bxc4 Ba4 23. Qc1 exf4 24. Bxf4 Nfd7 25. Bxh6 Ne5 26. Bf1 Bxh6 27. Qxh6 Nbxc4
28. Bxc4 Nxc4 29. Ng4 Ne5 30. Nh5 1-0

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "2"]
[White "Ivkov, Borislav"]
[Black "Kavalek, Lubomir"]
[Result "1-0"]
[PlyCount "83"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nf3 d6 6. O-O c6 7. Nc3 Qa5 8. h3 e5
9. d5 cxd5 10. cxd5 b5 11. Nd2 b4 12. Nce4 Nxe4 13. Nxe4 Qd8 14. Bg5 f6 15. Bd2
a5 16. a3 Na6 17. axb4 axb4 18. Bxb4 f5 19. Nd2 Rb8 20. Bc3 Nc7 21. Nc4 Nb5 22.
Bb4 e4 23. e3 Bb7 24. Ra5 Qc7 25. Qc1 Ba8 26. Rxb5 Rxb5 27. Bxd6 Qc8 28. Bxf8
Bxf8 29. d6 Bd5 30. Rd1 Be6 31. Bf1 Rc5 32. b3 f4 33. exf4 Bxh3 34. Qe3 Rh5 35.
Bxh3 Qxh3 36. Qxe4 Qh2+ 37. Kf1 Qh3+ 38. Kg1 Qh2+ 39. Kf1 Qh3+ 40. Qg2 Qg4 41.
Ne3 Qd7 42. Kg1 1-0

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "2"]
[White "Kotov, Alexander"]
[Black "Langeweg, Kick"]
[Result "1/2-1/2"]
[PlyCount "60"]

1. c4 Nf6 2. Nc3 e6 3. Nf3 Bb4 4. e3 O-O 5. Bd3 b6 6. a3 Bxc3 7. dxc3 d5 8.
cxd5 exd5 9. O-O Ba6 10. Bxa6 Nxa6 11. b4 c6 12. Qd3 b5 13. a4 Nc7 14. Nd4 Qd7
15. f3 Rfe8 16. axb5 cxb5 17. Bd2 a6 18. Ra2 Ne6 19. Nb3 Qc6 20. Rfa1 Nd7 21.
Na5 Qd6 22. c4 bxc4 23. Nxc4 Qc6 24. Nb2 Ne5 25. Qf1 Nc7 26. Qc1 Qg6 27. Kh1
Nb5 28. Na4 Rac8 29. Qb1 Qxb1+ 30. Rxb1 Nc4 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "2"]
[White "Marovic, Drazen"]
[Black "Lengyel, Levente"]
[Result "1/2-1/2"]
[PlyCount "61"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 O-O 6. a3 Bxc5 7. Nf3 d5 8.
cxd5 exd5 9. Bg5 Be6 10. e3 Nbd7 11. Bd3 Be7 12. O-O h6 13. Bh4 Nc5 14. Nd4
Nfd7 15. Bxe7 Qxe7 16. Rad1 Rac8 17. Qe2 Nxd3 18. Qxd3 Ne5 19. Qe2 Rfd8 20. h3
Nc4 21. Rc1 a6 22. Rc2 Nxb2 23. Nxe6 Qxe6 24. Rxb2 Rxc3 25. Rxb7 Rxa3 26. Qb2
Ra4 27. Rb6 Qe4 28. Rd1 a5 29. Rb8 Rxb8 30. Qxb8+ Kh7 31. Qb5 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "2"]
[White "Ree, Hans"]
[Black "Donner, Jan-Hein"]
[Result "1/2-1/2"]
[PlyCount "75"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Nge7 6. Bd3 Nf5 7. O-O cxd4 8. Bxf5
exf5 9. cxd4 Be6 10. Bg5 Qd7 11. h4 h6 12. Bf4 Be7 13. Qd2 O-O-O 14. Nc3 Kb8
15. Nb5 a6 16. Nc3 Rdg8 17. Rfc1 Qd8 18. h5 g5 19. hxg6 fxg6 20. Qd3 g5 21. Bd2
f4 22. Na4 Ka7 23. b4 Nxb4 24. Qb3 Nc6 25. Rab1 Qd7 26. Nb6 Qc7 27. Nxd5 Bxd5
28. Qxd5 g4 29. Ne1 Rd8 30. Qc4 Qd7 31. Bxf4 Bg5 32. Be3 Qd5 33. Qa4 g3 34. Rc5
Bxe3 35. fxe3 Qe4 36. Qb3 Nxd4 37. exd4 Qxd4+ 38. Kh1 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "2"]
[White "Zuidema, Coen"]
[Black "Bronstein, David I"]
[Result "1/2-1/2"]
[PlyCount "45"]

1. e4 e6 2. d4 d5 3. Nd2 c5 4. Ngf3 a6 5. dxc5 Bxc5 6. Bd3 Nc6 7. O-O Nge7 8.
exd5 exd5 9. Nb3 Bd6 10. Nbd4 Bg4 11. Be3 Ne5 12. Be2 Nc4 13. Bc1 Bc5 14. b3
Nd6 15. Bb2 O-O 16. Ng5 Bxe2 17. Qxe2 Bxd4 18. Bxd4 Nef5 19. Qh5 h6 20. Nf3 Rc8
21. c3 Nxd4 22. cxd4 Ne4 23. Rac1 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "3"]
[White "Bronstein, David I"]
[Black "Bilek, Istvan"]
[Result "1/2-1/2"]
[PlyCount "37"]

1. d4 g6 2. e4 d6 3. c3 Nf6 4. Qc2 Bg7 5. Bg5 h6 6. Bh4 Nbd7 7. f4 Nh5 8. f5 g5
9. Bf2 e6 10. Nd2 exf5 11. exf5 Qe7+ 12. Ne2 Ndf6 13. h3 Nd5 14. g4 Nhf6 15.
O-O-O Ne3 16. Bxe3 Qxe3 17. Bg2 O-O 18. Bf3 Re8 19. Ng3 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "3"]
[White "Donner, Jan-Hein"]
[Black "Bouwmeester, Hans"]
[Result "1-0"]
[PlyCount "39"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4
Qe7 9. a3 Ba5 10. Bd3 Bd7 11. Qe2 Bb6 12. dxc5 Qxc5 13. e4 Qh5 14. e5 Ng4 15.
h3 Nh6 16. Ne4 Bc6 17. Bf4 Nd7 18. Rac1 Rfd8 19. Rxc6 bxc6 20. Ng3 1-0

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "3"]
[White "Jongsma, Lex"]
[Black "Marovic, Drazen"]
[Result "0-1"]
[PlyCount "68"]

1. Nf3 Nf6 2. c4 g6 3. b4 Bg7 4. Bb2 O-O 5. g3 c6 6. Bg2 a5 7. bxa5 Qxa5 8. O-O
d6 9. d3 Nbd7 10. Nbd2 Nb6 11. a4 Nxa4 12. Qc2 Bd7 13. Ra2 b5 14. Rfa1 Rfc8 15.
d4 Qd8 16. Bc1 Nb6 17. e4 Rxa2 18. Rxa2 Nxc4 19. Nxc4 bxc4 20. e5 Ne8 21. Ra7
d5 22. Ba3 Nc7 23. Bb4 Nb5 24. Ba5 Qe8 25. Rb7 Ra8 26. Qd2 Qc8 27. Rb6 c3 28.
Bxc3 Qc7 29. Ba5 Qa7 30. h4 h6 31. e6 Bxe6 32. h5 Qxa5 33. Rb8+ Kh7 34. hxg6+
fxg6 0-1

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "3"]
[White "Kavalek, Lubomir"]
[Black "Zuidema, Coen"]
[Result "1-0"]
[PlyCount "122"]

1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. d4 Be7 5. Bg5 O-O 6. e3 h6 7. Bh4 Nbd7 8. Rc1
c6 9. a3 a6 10. Bd3 dxc4 11. Bxc4 b5 12. Ba2 c5 13. O-O Bb7 14. Qe2 cxd4 15.
Nxd4 Rc8 16. Rfd1 Nd5 17. Bxd5 Bxd5 18. Bxe7 Qxe7 19. Nxd5 exd5 20. Rc2 Nf6 21.
Nc6 Qb7 22. Rdc1 Kh8 23. h3 Qb6 24. Nd4 Rc4 25. b3 Rxc2 26. Qxc2 Qd6 27. Qc5
Rd8 28. Qc7 Rd7 29. Qa5 Ne4 30. Rc6 Qe7 31. Qxa6 b4 32. a4 Kh7 33. Qe2 Nc3 34.
Qd3+ g6 35. Nc2 Na2 36. Qd4 Nc1 37. Qxb4 Qxb4 38. Nxb4 Nxb3 39. Rc3 Nd2 40. Rd3
Rb7 41. Rxd2 Rxb4 42. Ra2 Rb6 43. a5 Ra6 44. Kf1 Kg7 45. Ke2 Kf6 46. Kd3 Ke6
47. Kc3 Kd6 48. Kb4 Kc6 49. Rc2+ Kb7 50. Kb5 Rf6 51. Ra2 Rf5 52. a6+ Ka7 53.
Kc5 h5 54. h4 g5 55. hxg5 Rxg5 56. f4 Rg3 57. Kd4 h4 58. Re2 Kxa6 59. Kxd5 Kb5
60. e4 Kb4 61. Kd4 Kb3 1-0

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "3"]
[White "Kuijpers, Frans"]
[Black "Ivkov, Borislav"]
[Result "0-1"]
[PlyCount "100"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3
O-O 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Re8 13. Nf1 Bf8 14. Ng3 g6 15. a4
Bd7 16. axb5 axb5 17. b4 cxb4 18. cxb4 Nc4 19. Rxa8 Rxa8 20. Bb3 Ra1 21. Qd3
Be8 22. Qc3 Ra7 23. Bg5 Nd7 24. Rc1 Ra3 25. Qc2 Ndb6 26. dxe5 dxe5 27. Nd2 Bxb4
28. Nxc4 bxc4 29. Ba2 Rc3 30. Qb1 Rxc1+ 31. Bxc1 Bc5 32. Bd2 Qd6 33. Nf1 Ba4
34. Bc3 Bd4 35. Bb4 Bc5 36. Bc3 Bd4 37. Bb4 Qc6 38. Qc1 Bc5 39. Ba5 Bb3 40.
Bxb3 cxb3 41. Qb1 Nc4 42. Qxb3 Nxa5 43. Qb8+ Bf8 44. Qxe5 Nc4 45. Qd4 Bc5 46.
Qd3 Ne5 47. Qb1 Qb6 48. Qc2 Bd4 49. Ng3 h5 50. Qc8+ Kg7 0-1

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "3"]
[White "Langeweg, Kick"]
[Black "Ciric, Dragoljub M"]
[Result "1/2-1/2"]
[PlyCount "26"]

1. c4 Nf6 2. Nf3 e6 3. b3 d5 4. g3 Be7 5. Bg2 O-O 6. O-O c6 7. Bb2 b5 8. Qc2
Bb7 9. d3 Na6 10. Nbd2 Rc8 11. Rad1 bxc4 12. dxc4 Qa5 13. a3 Nb8 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "3"]
[White "Lengyel, Levente"]
[Black "Ree, Hans"]
[Result "1/2-1/2"]
[PlyCount "37"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3
b4 9. Ne4 Nxe4 10. Bxe4 Bb7 11. Qa4 Qb6 12. Nd2 Rc8 13. Nc4 Qa6 14. Qxa6 Bxa6
15. Bd3 c5 16. Nd6+ Bxd6 17. Bxa6 Rc7 18. Bd3 O-O 19. O-O 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "3"]
[White "Shamkovich, Leonid"]
[Black "Kotov, Alexander"]
[Result "1/2-1/2"]
[PlyCount "173"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 e6 6. Nf3 Be7 7. cxd5 Nxd5 8.
Bd3 Nc6 9. O-O O-O 10. Re1 Ncb4 11. Bb1 b6 12. a3 Nxc3 13. bxc3 Nd5 14. Qd3 g6
15. Bh6 Re8 16. Ne5 Bf8 17. Bxf8 Rxf8 18. Qg3 Bb7 19. Be4 Qe7 20. Bxd5 Bxd5 21.
c4 Bb7 22. d5 Rad8 23. h4 Qd6 24. dxe6 Qxe6 25. Ng4 Qc6 26. Re3 h5 27. Ne5 Qf6
28. Rae1 Rd4 29. Qg5 Qxg5 30. hxg5 Kg7 31. f3 Re8 32. Kf2 Ba6 33. Re4 Rd2+ 34.
R1e2 Rd1 35. Rf4 Re7 36. Nxg6 Rc7 37. Ne5 Rc1 38. Ree4 Rc2+ 39. Kg3 Ra2 40. Re3
b5 41. cxb5 Bxb5 42. Re1 Rxa3 43. Rh4 Ra2 44. Rxh5 Rcc2 45. Rh2 a5 46. Reh1 Kf8
47. g6 fxg6 48. Nxg6+ Ke8 49. Nf4 Kd7 50. Rh6 Bc4 51. Rg6 Kc8 52. Rh8+ Kb7 53.
Rh7+ Ka8 54. Rh8+ Kb7 55. Rh7+ Ka8 56. Rd6 Rcb2 57. Rdd7 Rb6 58. Rc7 Ba6 59.
Rh8+ Rb8 60. Rh6 Rg8+ 61. Kh4 Bb7 62. Rhh7 Rb2 63. Kh3 Bc8+ 64. Kh2 Bb7 65. Rc3
a4 66. Rh5 Kb8 67. Ra5 Rb4 68. Nh3 Rc8 69. Ra3 Bc6 70. Rc5 Kb7 71. Re3 Rb3 72.
Re7+ Rc7 73. Re1 a3 74. Ra1 Kb6 75. Re5 Ra7 76. Nf4 Bb5 77. Nd5+ Kc6 78. Ne7+
Kd7 79. Nf5 Ra4 80. Re7+ Kc6 81. Ree1 Bd3 82. Rec1+ Kd7 83. Ne3 a2 84. Nd5 Raa3
85. Nc3 Rxc3 86. Rxc3 Rxc3 87. Rxa2 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "4"]
[White "Bouwmeester, Hans"]
[Black "Lengyel, Levente"]
[Result "1-0"]
[PlyCount "53"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Nf3 d5 6. Bd3 O-O 7. O-O Nbd7 8. cxd5
exd5 9. Qb3 Bxc3 10. Qxc3 b6 11. b3 Bb7 12. Bb2 Rc8 13. dxc5 bxc5 14. Bf5 Re8
15. Rfd1 h6 16. Rac1 Re7 17. Nd2 Qb6 18. Nf1 a5 19. Ng3 a4 20. Bh3 axb3 21.
axb3 Ba8 22. e4 Rb8 23. exd5 Qxb3 24. Qxb3 Rxb3 25. d6 Re8 26. Bxf6 Nxf6 27.
Rxc5 1-0

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "4"]
[White "Ciric, Dragoljub M"]
[Black "Shamkovich, Leonid"]
[Result "1/2-1/2"]
[PlyCount "80"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. a3 Bxc3+ 8.
Nxc3 d5 9. exd5 exd5 10. Bd3 d4 11. Qe2+ Be6 12. Ne4 Nxe4 13. Bxe4 O-O 14. O-O
Bd5 15. Bd3 Qh4 16. Re1 Rad8 17. Bd2 Rd6 18. f3 Re6 19. Qf2 Qxf2+ 20. Kxf2 Rfe8
21. c4 dxc3 22. Bxc3 Rxe1 23. Rxe1 Rxe1 24. Kxe1 f6 25. Kf2 Kf7 26. Ke3 h6 27.
g4 g5 28. f4 Be6 29. f5 Bb3 30. Be4 Ke7 31. Bf3 Kf7 32. Kd2 a6 33. Kd3 Ke7 34.
Ke3 Bc2 35. Be4 Bd1 36. h3 Bb3 37. Kd3 Bf7 38. b4 Be8 39. Kc4 b6 40. Bd5 Kd6
1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "4"]
[White "Ivkov, Borislav"]
[Black "Langeweg, Kick"]
[Result "1-0"]
[PlyCount "129"]

1. c4 Nf6 2. d4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ 6. Bd2 Be7 7. Nc3 d5 8. O-O
O-O 9. Ne5 c6 10. Qa4 Nbd7 11. Nxc6 Bxc6 12. Qxc6 Rc8 13. Qb5 Rxc4 14. e3 Qc8
15. Rfc1 a6 16. Qb3 Rc7 17. e4 Nxe4 18. Nxe4 dxe4 19. Bxe4 b5 20. Rxc7 Qxc7 21.
Rc1 Qd8 22. Be3 Nf6 23. Bb7 Qb6 24. Bf3 Qa5 25. Bf4 h6 26. h4 b4 27. Rc7 Bd8
28. Rb7 Bb6 29. Bd6 Rc8 30. Be5 Rd8 31. Qc4 b3 32. axb3 Qe1+ 33. Kg2 Ne4 34.
Qf1 Qxf1+ 35. Kxf1 Nd2+ 36. Ke2 Nxf3 37. Rxb6 Nxd4+ 38. Bxd4 Rxd4 39. Rxa6 Rb4
40. Ra3 Kf8 41. Kd3 Rb7 42. b4 Rxb4 43. Ra8+ Ke7 44. Ra7+ Kf6 45. Kc3 Rb8 46.
b4 e5 47. Kc4 Rc8+ 48. Kb3 Rc1 49. Ra2 Ke6 50. b5 Kd6 51. Kb4 Rb1+ 52. Ka5 Kc7
53. Ka6 f6 54. h5 Rb3 55. Rc2+ Kb8 56. Kb6 Rd3 57. Rc7 Rd6+ 58. Rc6 Rd2 59. f4
Rd3 60. fxe5 fxe5 61. Re6 Kc8 62. g4 Rd4 63. g5 hxg5 64. Rxe5 g6 65. Kc5 1-0

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "4"]
[White "Kavalek, Lubomir"]
[Black "Kuijpers, Frans"]
[Result "1-0"]
[PlyCount "77"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Nc6 6. Nxc6 dxc6 7. f4 Bc5 8.
Qe2 Ne7 9. Nd2 Ng6 10. g3 O-O 11. e5 b6 12. h4 Re8 13. Ne4 Be7 14. Ng5 Nf8 15.
Qh5 g6 16. Qf3 Bb7 17. Be3 Rb8 18. Be4 Qc7 19. O-O-O c5 20. g4 f6 21. exf6 Bxf6
22. Bxb7 Qxb7 23. Ne4 Bg7 24. Bd2 Red8 25. Bc3 Bxc3 26. Rxd8 Bxb2+ 27. Kb1 Bg7
28. g5 Qc7 29. Rxb8 Qxb8 30. Rd1 Qc7 31. c3 b5 32. Qe3 b4 33. cxb4 cxb4 34.
Nf6+ Bxf6 35. gxf6 Kf7 36. Qe5 Qc4 37. Qd6 Qe4+ 38. Ka1 Kg8 39. Qe7 1-0

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "4"]
[White "Kotov, Alexander"]
[Black "Donner, Jan-Hein"]
[Result "1/2-1/2"]
[PlyCount "83"]

1. c4 Nf6 2. Nf3 g6 3. b3 Bg7 4. Bb2 O-O 5. g3 d6 6. Bg2 e5 7. O-O Nfd7 8. d4
e4 9. Ne1 Re8 10. Nc3 f5 11. Nc2 Nf6 12. d5 Nbd7 13. Qd2 a5 14. Nb5 Nc5 15. Ne3
Bd7 16. Nd4 h5 17. Bc3 Ng4 18. Nxg4 hxg4 19. Nc2 Bxc3 20. Qxc3 Kf7 21. f3 gxf3
22. exf3 exf3 23. Rxf3 Qf6 24. Raf1 Qxc3 25. Rxc3 Re2 26. Rf2 Ne4 27. Bxe4 Rxe4
28. Rf4 Re2 29. Rf2 Re4 30. Re3 Rxe3 31. Nxe3 Re8 32. Re2 Re4 33. Kf2 f4 34.
gxf4 Rxf4+ 35. Ke1 Kf6 36. Kd2 Rf3 37. Nd1 Bf5 38. Re3 Rxe3 39. Kxe3 Ke5 40.
Nc3 c6 41. dxc6 bxc6 42. Ne2 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "4"]
[White "Marovic, Drazen"]
[Black "Bronstein, David I"]
[Result "1/2-1/2"]
[PlyCount "81"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nf3 d6 6. O-O Nbd7 7. Nc3 e5 8. e4
c6 9. h3 a6 10. Qc2 b6 11. Be3 Qe7 12. Rad1 Bb7 13. Rfe1 Rfe8 14. a3 Rad8 15.
b4 exd4 16. Bxd4 c5 17. bxc5 bxc5 18. Nd5 Qf8 19. Bc3 Rb8 20. Nd2 Rec8 21. Rb1
Ne8 22. f4 Bxc3 23. Qxc3 Rd8 24. e5 dxe5 25. fxe5 Qg7 26. Rxb7 Rxb7 27. Ne7+
Kf8 28. Bxb7 Kxe7 29. Qe3 Nc7 30. Qg5+ Ke8 31. Bd5 h6 32. Qf4 Ke7 33. Nf3 g5
34. Qe3 Qg6 35. h4 Rb8 36. hxg5 hxg5 37. Nxg5 Rb1 38. Rxb1 Qxb1+ 39. Kh2 Nxd5
40. cxd5 Qa2+ 41. Kh3 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "4"]
[White "Ree, Hans"]
[Black "Jongsma, Lex"]
[Result "1/2-1/2"]
[PlyCount "69"]

1. c4 Nf6 2. g3 c6 3. Bg2 d5 4. Nf3 Bg4 5. b3 e6 6. O-O Nbd7 7. Bb2 Be7 8. d3
O-O 9. Nbd2 a5 10. a3 Re8 11. h3 Bh5 12. Qc2 Bf8 13. e4 dxe4 14. Nxe4 Nxe4 15.
dxe4 e5 16. Bc3 Qb6 17. Qb2 f6 18. b4 axb4 19. axb4 c5 20. b5 Bd6 21. Qd2 Bc7
22. Qd5+ Kf8 23. Rfd1 Red8 24. Rxa8 Rxa8 25. Qd3 Kg8 26. Rf1 Nf8 27. Nh4 Rd8
28. Qe3 Bf7 29. Qe2 Qe6 30. Rc1 Qxc4 31. Qxc4 Bxc4 32. Bxe5 Bxe5 33. Rxc4 Rd1+
34. Bf1 Nd7 35. Nf5 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "4"]
[White "Zuidema, Coen"]
[Black "Bilek, Istvan"]
[Result "0-1"]
[PlyCount "116"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 Nc6 8. Qd2
O-O 9. Bc4 Bd7 10. Bb3 Ne5 11. h4 Rc8 12. h5 Nc4 13. Bxc4 Rxc4 14. O-O-O Qa5
15. hxg6 fxg6 16. Nb3 Qe5 17. Bd4 Qe6 18. Rhe1 Rfc8 19. e5 dxe5 20. Rxe5 Qd6
21. Qe2 e6 22. Re3 Nd5 23. Bxg7 Kxg7 24. Rd2 Kg8 25. Nxd5 exd5 26. g4 Bb5 27.
Kb1 d4 28. Re4 Qf6 29. Re6 Qf7 30. Re7 Qf6 31. Qe6+ Qxe6 32. Rxe6 d3 33. cxd3
Rf4 34. Re3 Rcf8 35. Kc2 Bc6 36. d4 Bxf3 37. d5 Rc4+ 38. Kd3 Bxd5 39. Re5 Bf7
40. Nd4 Rd8 41. Ke3 Rc7 42. b3 h6 43. Nb5 Rxd2 44. Kxd2 Rd7+ 45. Ke3 a6 46. Nc3
Kg7 47. Ne4 b6 48. Nc3 Kf6 49. Re4 Re7 50. Na4 Rxe4+ 51. Kxe4 Be6 52. Nxb6 Bxg4
53. b4 Bf5+ 54. Kf3 Ke5 55. Nc4+ Kd5 56. Ne3+ Kd4 57. a4 Bd7 58. b5 Bxb5 0-1

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "5"]
[White "Bilek, Istvan"]
[Black "Marovic, Drazen"]
[Result "1/2-1/2"]
[PlyCount "30"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O O-O 5. d4 d6 6. b3 Nbd7 7. Bb2 e5 8. dxe5
Ng4 9. Nbd2 dxe5 10. e4 Nh6 11. Nc4 f6 12. Qd5+ Nf7 13. Rad1 Re8 14. Qa5 c6 15.
Qxd8 Rxd8 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "5"]
[White "Bronstein, David I"]
[Black "Ree, Hans"]
[Result "1/2-1/2"]
[PlyCount "71"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. c3 a6 5. Bxc6 dxc6 6. d3 Nf6 7. O-O Bg7 8. Qe2
O-O 9. Rd1 Qc7 10. e5 Ne8 11. Nbd2 f6 12. h3 fxe5 13. Nc4 e4 14. dxe4 b5 15.
Ncd2 e5 16. Nb3 c4 17. Nc5 Nf6 18. Qd2 Qb6 19. Qd6 Ne8 20. Nd7 Nxd6 21. Nxb6
Rb8 22. Nxc8 Nxc8 23. Be3 Nb6 24. b3 a5 25. Rd6 Rfc8 26. Bxb6 Rxb6 27. bxc4
bxc4 28. Rad1 Rb2 29. a4 Rc2 30. Rd8+ Rxd8 31. Rxd8+ Kf7 32. Rd7+ Kg8 33. Rc7
Rxc3 34. Rxc6 Bh6 35. Kf1 Rc1+ 36. Ke2 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "5"]
[White "Donner, Jan-Hein"]
[Black "Ciric, Dragoljub M"]
[Result "1/2-1/2"]
[PlyCount "83"]

1. d4 Nf6 2. c4 c5 3. d5 d6 4. Nc3 g6 5. e4 Bg7 6. Be2 O-O 7. Nf3 e6 8. O-O
exd5 9. cxd5 Re8 10. Nd2 a6 11. a4 b6 12. f3 Nfd7 13. Nc4 Ne5 14. Na3 f5 15.
Be3 Nbd7 16. Qd2 Nf7 17. Bd3 Nde5 18. Be2 Bd7 19. exf5 gxf5 20. Bf2 Bh6 21. f4
Ng4 22. Bg3 Qf6 23. Nc2 Qg6 24. h3 Nf6 25. Bh4 Kh8 26. Kh2 Rg8 27. Rg1 Rae8 28.
Raf1 Ne4 29. Nxe4 Rxe4 30. b3 Ne5 31. Bxa6 Rxf4 32. Qe1 Re4 33. Qf2 c4 34. Bxc4
Nxc4 35. bxc4 Bxa4 36. g3 f4 37. Nd4 Rge8 38. Ne6 Rxc4 39. gxf4 Rc2 40. Rxg6
Rxf2+ 41. Bxf2 hxg6 42. Bxb6 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "5"]
[White "Jongsma, Lex"]
[Black "Bouwmeester, Hans"]
[Result "1/2-1/2"]
[PlyCount "50"]

1. e4 e6 2. d3 d5 3. Nd2 Nc6 4. Ngf3 Nf6 5. c3 Be7 6. Qc2 e5 7. Be2 O-O 8. O-O
a5 9. Re1 Re8 10. Nf1 h6 11. Ng3 Bf8 12. b3 Bg4 13. a3 Nh5 14. h3 Nxg3 15. fxg3
Be6 16. Be3 d4 17. cxd4 exd4 18. Bf2 Qd7 19. Qb2 Rad8 20. g4 g6 21. g5 h5 22.
Rac1 Qd6 23. Ra1 Bg7 24. Reb1 Ra8 25. Qd2 Na7 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "5"]
[White "Kuijpers, Frans"]
[Black "Zuidema, Coen"]
[Result "1/2-1/2"]
[PlyCount "116"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5
Be6 9. Qe2 Be7 10. Rd1 Nc5 11. Be3 O-O 12. c4 bxc4 13. Bxc4 Na5 14. Bxd5 Bxd5
15. Nc3 Bxf3 16. Qxf3 Qe8 17. b4 Na4 18. Nxa4 Qxa4 19. bxa5 Qxa5 20. Rd5 Qa3
21. h3 Rad8 22. Kh2 Rxd5 23. Qxd5 Rd8 24. Qe4 h6 25. Rc1 Qxa2 26. Rxc7 Bf8 27.
Ra7 Qd5 28. Qxd5 Rxd5 29. f4 Bc5 30. Bxc5 Rxc5 31. Rxa6 h5 32. Kg3 Rc2 33. Ra3
Kf8 34. f5 Rc4 35. Kf3 h4 36. Ra8+ Ke7 37. Rg8 Rc3+ 38. Kf4 Rc4+ 39. Kg5 Re4
40. Rxg7 Rxe5 41. Kxh4 Rxf5 42. Rg5 Rf2 43. Kh5 Rf6 44. Rg8 Ra6 45. h4 Ra4 46.
g4 f6 47. Kh6 f5 48. gxf5 Kf6 49. h5 Kxf5 50. Rg6 Rh4 51. Rg1 Rh2 52. Rf1+ Ke6
53. Kg6 Rg2+ 54. Kh7 Rh2 55. h6 Ke7 56. Kg7 Rg2+ 57. Kh8 Rh2 58. h7 Rg2 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "5"]
[White "Langeweg, Kick"]
[Black "Kavalek, Lubomir"]
[Result "0-1"]
[PlyCount "54"]

1. c4 c5 2. Nc3 g6 3. g3 Bg7 4. Bg2 Nc6 5. Nf3 e5 6. O-O Nge7 7. d3 d6 8. Rb1
O-O 9. a3 a5 10. Ne1 Be6 11. Nd5 Rb8 12. Nc2 b5 13. Nce3 bxc4 14. dxc4 f5 15.
Nc3 e4 16. Bd2 Nd4 17. Ncd5 Nxd5 18. Nxd5 Bxd5 19. cxd5 Nb3 20. f3 Nxd2 21.
Qxd2 e3 22. Qc2 a4 23. Qxa4 Bxb2 24. f4 Qf6 25. Kh1 Rfc8 26. Rfd1 c4 27. Qc2
Qc3 0-1

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "5"]
[White "Lengyel, Levente"]
[Black "Kotov, Alexander"]
[Result "1-0"]
[PlyCount "125"]

1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 Be7 5. Bg5 h6 6. Bh4 O-O 7. e3 Ne4 8. Bxe7
Qxe7 9. Qc2 Nf6 10. cxd5 exd5 11. Bd3 c6 12. O-O Be6 13. Rab1 a5 14. Rfc1 Nbd7
15. a3 Rfc8 16. Na4 Qd6 17. b4 axb4 18. axb4 b5 19. Nc5 Nb6 20. Ra1 Nc4 21. Ra2
Nd7 22. Rca1 Rxa2 23. Rxa2 Bg4 24. Bh7+ Kf8 25. Bf5 Bxf5 26. Qxf5 Rc7 27. Qh7
Ndb6 28. Qh8+ Ke7 29. Qxg7 Qg6 30. Qxg6 fxg6 31. Kf1 g5 32. Ra6 Kd6 33. Ne5 Nc8
34. Ng4 h5 35. Nh6 Rh7 36. Nf5+ Kc7 37. h3 g4 38. Ke2 gxh3 39. gxh3 Rf7 40. Ng3
h4 41. Nh5 Kd6 42. Nf4 Rg7 43. Ra8 N4b6 44. Rb8 Ra7 45. Rb7 Rxb7 46. Nxb7+ Kc7
47. Nc5 Ne7 48. Kf3 Kd8 49. Kg4 Ke8 50. Kxh4 Kf7 51. Kg5 Nc4 52. Ncd3 Nd6 53.
Ne5+ Ke8 54. f3 Nc4 55. Nxc4 dxc4 56. e4 Kf7 57. Ne2 Ng6 58. f4 Nf8 59. f5 Nd7
60. h4 Nb8 61. h5 Na6 62. h6 Nxb4 63. f6 1-0

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "5"]
[White "Shamkovich, Leonid"]
[Black "Ivkov, Borislav"]
[Result "1-0"]
[PlyCount "93"]

1. Nf3 g6 2. e4 Bg7 3. d4 d6 4. Nc3 a6 5. a4 b6 6. Bg5 Bb7 7. Bc4 h6 8. Bh4 Nd7
9. O-O c6 10. Qe2 Qc7 11. Bb3 e6 12. Rad1 Ne7 13. Rfe1 Kf8 14. Bg3 Kg8 15. h4
Kh7 16. h5 Rhg8 17. hxg6+ Nxg6 18. Rd3 Rae8 19. Bh2 b5 20. Ng5+ hxg5 21. Qh5+
Bh6 22. Rh3 Nh4 23. Qxf7+ Kh8 24. Bxe6 Bc8 25. Rxh4 gxh4 26. Bf5 Nf6 27. Qxc7
Bxf5 28. Qxd6 Re6 29. Qc5 Bh3 30. Bg3 Bf8 31. Qa7 b4 32. gxh3 Re7 33. Qxa6 bxc3
34. bxc3 hxg3 35. f3 Nh5 36. Qxc6 Kh7 37. e5 Rf7 38. Qe4+ Kh6 39. e6 Rf4 40.
Qe3 Be7 41. d5 Rd8 42. c4 Bg5 43. e7 Re8 44. Qe6+ Nf6 45. d6 Rd4 46. h4 Bxh4
47. Qe3+ 1-0

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "6"]
[White "Bouwmeester, Hans"]
[Black "Bronstein, David I"]
[Result "0-1"]
[PlyCount "66"]

1. Nf3 g6 2. g3 Bg7 3. d4 f5 4. Bg2 Nf6 5. O-O O-O 6. c4 d6 7. d5 c5 8. Nc3 Na6
9. e4 fxe4 10. Ng5 Bg4 11. Qb3 Qb6 12. Ngxe4 Nxe4 13. Bxe4 Qxb3 14. axb3 Nb4
15. Bg5 Rf7 16. Kg2 a6 17. Rae1 b5 18. f3 Bd7 19. g4 Rb8 20. h4 bxc4 21. bxc4
Nc2 22. Bxc2 Rxb2 23. Rf2 Bxc3 24. Rxe7 Rxe7 25. Bxe7 Bd4 26. Re2 Be5 27. Bd3
Rb3 28. Be4 a5 29. Bg5 a4 30. f4 Bxg4 31. Ra2 Rb2+ 32. Rxb2 Bxb2 33. Be7 Bf5
0-1

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "6"]
[White "Ciric, Dragoljub M"]
[Black "Lengyel, Levente"]
[Result "0-1"]
[PlyCount "130"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3
O-O 9. h3 Na5 10. Bc2 c5 11. d4 Nd7 12. Nbd2 cxd4 13. cxd4 Nc6 14. d5 Nb4 15.
Bb1 a5 16. Nf1 Nc5 17. Ng3 g6 18. Bh6 Re8 19. Qd2 Bf8 20. Bg5 Be7 21. Be3 Bf8
22. Nh2 Bg7 23. Ng4 Rf8 24. Bg5 f6 25. Nh6+ Kh8 26. Be3 Bd7 27. Rc1 Qe7 28. h4
Rfc8 29. f3 Rc7 30. Ne2 Rac8 31. g4 Be8 32. Kg2 Na4 33. a3 Na6 34. Qxa5 N6c5
35. Qb4 Nb6 36. b3 Qf8 37. g5 f5 38. Rd1 Bxh6 39. exf5 gxf5 40. gxh6 Nxd5 41.
Rxd5 Qg8+ 42. Bg5 Qxd5 43. Bxf5 Bh5 44. Rf1 Rf8 45. Ng3 Rcf7 46. Nxh5 Rxf5 47.
Qg4 Ne6 48. Ng3 R5f7 49. Ne4 Nxg5 50. hxg5 Rg8 51. Rf2 Qxb3 52. Nxd6 Rf4 53.
Qg3 Rd8 54. Ne4 Qxa3 55. g6 hxg6 56. Ng5 Qe7 57. Re2 Rdf8 58. Kh2 b4 59. Nh3
Qh4 60. Rxe5 Qxg3+ 61. Kxg3 Rxf3+ 62. Kg4 R3f5 63. Re4 Rb8 64. Nf4 Kh7 65. Re6
Rxf4+ 0-1

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "6"]
[White "Ivkov, Borislav"]
[Black "Donner, Jan-Hein"]
[Result "1/2-1/2"]
[PlyCount "52"]

1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 exd5 5. Bb5+ Nc6 6. Ngf3 Bd6 7. O-O Nge7 8.
c4 O-O 9. dxc5 Bxc5 10. Nb3 Bb6 11. Bg5 dxc4 12. Qxd8 Bxd8 13. Bxc4 h6 14. Bf4
Bb6 15. Rfe1 Bg4 16. Ne5 Nxe5 17. Bxe5 Nc6 18. Bc3 Rad8 19. h3 Bc8 20. Rac1
Rfe8 21. Rxe8+ Rxe8 22. Bb5 Be6 23. Ba5 Bxb3 24. Bxb6 axb6 25. axb3 Nd4 26. Bc4
Ne2+ 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "6"]
[White "Kavalek, Lubomir"]
[Black "Shamkovich, Leonid"]
[Result "1/2-1/2"]
[PlyCount "118"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e6 5. Nc3 d6 6. Be3 Nf6 7. Be2 Be7 8.
O-O O-O 9. f4 Bd7 10. Nb3 Rc8 11. g4 d5 12. exd5 Nxd5 13. Nxd5 exd5 14. c3 Re8
15. Bf3 Bh4 16. Qd2 b6 17. Rad1 Qc7 18. Bf2 Bxf2+ 19. Rxf2 Rcd8 20. h3 Bc8 21.
Nd4 Nxd4 22. Qxd4 h6 23. Bg2 Qe7 24. f5 f6 25. Rfd2 Ba6 26. Qf2 Kf8 27. Bxd5
Qe3 28. Bc6 Rxd2 29. Rxd2 Qxf2+ 30. Kxf2 Rc8 31. Rd6 Rc7 32. Rd8+ Ke7 33. Re8+
Kf7 34. Ra8 Bc4 35. b3 Rxc6 36. Rxa7+ Kf8 37. bxc4 Rxc4 38. Ra3 h5 39. Kg3 hxg4
40. hxg4 Ke7 41. Kh4 Kf7 42. Kh5 Kg8 43. Ra7 Rf4 44. Rb7 Kh7 45. Rxb6 Rf3 46.
Kh4 Rxc3 47. a4 Ra3 48. Ra6 Rf3 49. a5 g5+ 50. fxg6+ Kxg6 51. Ra8 Ra3 52. a6
Kh6 53. Ra7 Kg6 54. Ra8 Kh6 55. a7 Kg7 56. g5 fxg5+ 57. Kxg5 Ra1 58. Kf4 Ra2
59. Ke4 Ra1 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "6"]
[White "Kotov, Alexander"]
[Black "Jongsma, Lex"]
[Result "1-0"]
[PlyCount "171"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. e3 Bg7 5. Qb3 c6 6. Nf3 O-O 7. Bd2 e6 8. Bd3 b6
9. a4 c5 10. dxc5 bxc5 11. O-O Nc6 12. cxd5 exd5 13. Bb5 Rb8 14. Qa3 Nb4 15.
Rac1 Qd6 16. Be2 a5 17. Rfd1 Bf5 18. Nb5 Qe7 19. Bf1 Ne4 20. Bc3 Rfe8 21. Bxg7
Kxg7 22. Nc3 Nf6 23. Bb5 Red8 24. b3 Rb6 25. Qb2 Kg8 26. Qe2 Re6 27. Rd2 d4 28.
Qd1 d3 29. Bc4 Red6 30. Ng5 Nfd5 31. Nxd5 Nxd5 32. h4 h6 33. e4 hxg5 34. Bxd5
Bxe4 35. Bxe4 Qxe4 36. hxg5 Rd5 37. Rc4 Qe5 38. Rg4 Kg7 39. Rg3 Qc3 40. Re3
Rxg5 41. Rdxd3 Rxd3 42. Rxd3 Qe5 43. Re3 Qd5 44. Qa1+ Kh7 45. Rh3+ Rh5 46. Rf3
Rf5 47. Rg3 Rg5 48. Rxg5 Qxg5 49. Qc3 Qd5 50. f3 Kg8 51. Kf2 Qd1 52. Qxc5 Qd2+
53. Kg3 f5 54. Qe7 Qd4 55. Qe8+ Kg7 56. Qe7+ Kg8 57. Qe6+ Kg7 58. Qc4 Qd2 59.
Qf4 Qe1+ 60. Kh2 Kh7 61. Qg3 Qd2 62. Qh4+ Kg7 63. Qe7+ Kg8 64. Qf6 Kh7 65. Kh3
Qd1 66. Qe7+ Kh6 67. Qe5 Qd8 68. Qf4+ Kg7 69. b4 g5 70. Qe5+ Kg6 71. bxa5 Qd7
72. Kh2 Qh7+ 73. Kg1 Qa7+ 74. Kf1 Qd7 75. Ke2 Qc6 76. Kd3 Qc1 77. Qe6+ Kg7 78.
a6 Qd1+ 79. Kc3 Qa1+ 80. Kb4 Qb2+ 81. Kc5 Qc3+ 82. Kd6 Qb4+ 83. Kc7 Qa5+ 84.
Kb7 Qb4+ 85. Qb6 Qxa4 86. a7 1-0

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "6"]
[White "Kuijpers, Frans"]
[Black "Langeweg, Kick"]
[Result "1/2-1/2"]
[PlyCount "50"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5
Be6 9. Qe2 Be7 10. Rd1 O-O 11. c4 bxc4 12. Bxc4 Bc5 13. Be3 Bxe3 14. Qxe3 Qb8
15. Bb3 Na5 16. Nbd2 Qa7 17. Qxa7 Rxa7 18. Nd4 Nxd2 19. Rxd2 c5 20. Ne2 Nxb3
21. axb3 d4 22. b4 d3 23. Nf4 c4 24. Rc1 Rc7 25. b3 Rfc8 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "6"]
[White "Ree, Hans"]
[Black "Bilek, Istvan"]
[Result "1/2-1/2"]
[PlyCount "47"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 e6 4. O-O Nge7 5. c3 a6 6. Ba4 b5 7. Bc2 Bb7 8. Re1
d5 9. d4 cxd4 10. exd5 Nxd5 11. cxd4 Be7 12. Nc3 Ncb4 13. Bb1 Nxc3 14. bxc3 Nd5
15. Qd3 Rc8 16. Bd2 Qc7 17. Ne5 Nxc3 18. Qg3 O-O 19. Bd3 f5 20. Rac1 b4 21. Bc4
Bd5 22. Bxc3 bxc3 23. Rxc3 Qa5 24. Bxd5 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "6"]
[White "Zuidema, Coen"]
[Black "Marovic, Drazen"]
[Result "1/2-1/2"]
[PlyCount "101"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ gxf6 6. Ne2 h5 7. Qd3 Nd7 8.
Bd2 Nb6 9. O-O-O Be6 10. Kb1 Qd7 11. Nf4 Bf5 12. Qb3 Qxd4 13. Be2 h4 14. Bc1
Qc5 15. Rhe1 Bh6 16. Be3 Qa5 17. Bh5 Rh7 18. Bg6 Bxf4 19. Bxh7 Be6 20. Bxb6
Qxe1 21. Rxe1 Bxb3 22. axb3 axb6 23. Re4 Bxh2 24. Rxh4 Bd6 25. Bf5 e6 26. Rh8+
Bf8 27. Bg4 Ra5 28. f4 Rd5 29. Kc1 f5 30. Bh5 Rd7 31. c3 Ke7 32. Rg8 Bh6 33. g3
e5 34. Rh8 Bg7 35. Rg8 Bh6 36. Rh8 Rd6 37. Rh7 exf4 38. Rxf7+ Ke6 39. Rh7 Ke5
40. gxf4+ Bxf4+ 41. Kb1 Bg5 42. Rxb7 c5 43. Rg7 Kf4 44. Rg6 Bf6 45. Kc2 Ke4 46.
Rg2 f4 47. Rd2 Rxd2+ 48. Kxd2 f3 49. Ke1 Ke3 50. c4 Bxb2 51. Be8 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "7"]
[White "Bilek, Istvan"]
[Black "Bouwmeester, Hans"]
[Result "1/2-1/2"]
[PlyCount "32"]

1. e4 e6 2. Qe2 c5 3. Nf3 Nc6 4. d3 Be7 5. g3 Nf6 6. Bg2 O-O 7. O-O d5 8. e5
Ne8 9. c4 Nc7 10. Nc3 Rb8 11. b3 b5 12. Nxb5 Nxb5 13. cxb5 Rxb5 14. Be3 Ba6 15.
Rfc1 Qb8 16. d4 Rb6 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "7"]
[White "Bronstein, David I"]
[Black "Kotov, Alexander"]
[Result "1-0"]
[PlyCount "99"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. h5 Bh7 8. Nf3
Nd7 9. Bd3 Bxd3 10. Qxd3 Qc7 11. Bd2 e6 12. O-O-O O-O-O 13. c4 Ngf6 14. Bc3 Bd6
15. Ne4 Bf4+ 16. Kc2 Ne5 17. Nxe5 Bxe5 18. Nc5 Bd6 19. Nb3 Qe7 20. a3 Rd7 21.
Qe2 Re8 22. Rhe1 Qf8 23. g4 Rde7 24. Qf3 Nh7 25. Na5 f5 26. Nxc6 bxc6 27. Qxc6+
Rc7 28. Qa6+ Kb8 29. c5 Bf4 30. Rxe6 Rxe6 31. Qxe6 Ng5 32. Qxf5 Qxf5+ 33. gxf5
Ne4 34. Ba5 Rd7 35. Be1 Kb7 36. f3 Nf6 37. Kd3 Kc6 38. Bh4 Nxh5 39. Kc4 Nf6 40.
Bxf6 gxf6 41. d5+ Kc7 42. d6+ Kc6 43. b4 a6 44. a4 Rb7 45. Rb1 Kd7 46. Kd5 Kd8
47. b5 axb5 48. axb5 Rg7 49. b6 Kc8 50. c6 1-0

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "7"]
[White "Donner, Jan-Hein"]
[Black "Kavalek, Lubomir"]
[Result "0-1"]
[PlyCount "68"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 c6 7. O-O Qa5 8. h3 e5
9. d5 cxd5 10. cxd5 b5 11. Nd2 Bd7 12. a3 Qc7 13. Qb3 Qb6 14. a4 bxa4 15. Qxb6
axb6 16. Nc4 b5 17. Nxd6 b4 18. Na2 Na6 19. Be3 Ne8 20. Ne4 f5 21. Nc5 Nxc5 22.
Bxc5 b3 23. Bxf8 Kxf8 24. Nb4 e4 25. Rab1 Rc8 26. f3 Rc4 27. Nc6 e3 28. f4 Bxc6
29. dxc6 Rc2 30. Ra1 Rxe2 31. Rxa4 Rxb2 32. Rc4 e2 33. Rfc1 Rd2 34. Kf2 b2 0-1

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "7"]
[White "Jongsma, Lex"]
[Black "Ciric, Dragoljub M"]
[Result "0-1"]
[PlyCount "80"]

1. e4 c5 2. Nf3 d6 3. Nc3 e6 4. Bb5+ Nc6 5. O-O Bd7 6. b3 Nf6 7. Bb2 e5 8. Re1
g6 9. Nd5 Bg7 10. c3 O-O 11. d4 exd4 12. cxd4 Nxd5 13. exd5 Nxd4 14. Bxd4 Bxb5
15. Bxg7 Kxg7 16. b4 b6 17. Rb1 Bd7 18. Qd2 Rc8 19. h4 h6 20. Rb3 cxb4 21. Qxb4
Rc5 22. Rbe3 Qf6 23. Re7 Rd8 24. Qd2 a5 25. R7e4 Qc3 26. Qf4 Rxd5 27. g4 Qf6
28. Qe3 g5 29. Qxb6 Bxg4 30. Nxg5 Bh5 31. Re6 Rxg5+ 32. hxg5 Qxg5+ 33. Kh2 Qh4+
34. Kg2 fxe6 35. Re3 Kh8 36. Rg3 Rg8 37. Qxd6 Rxg3+ 38. fxg3 Qe4+ 39. Kh2 Qc2+
40. Kg1 Qd1+ 0-1

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "7"]
[White "Langeweg, Kick"]
[Black "Zuidema, Coen"]
[Result "1-0"]
[PlyCount "53"]

1. Nf3 Nf6 2. c4 e6 3. b3 d5 4. Bb2 Be7 5. g3 O-O 6. Bg2 c5 7. O-O Nc6 8. e3 b6
9. Nc3 Ba6 10. Nb5 Rc8 11. Qe2 Bb7 12. d3 a6 13. Nc3 Rc7 14. Rfd1 Re8 15. cxd5
exd5 16. d4 Qa8 17. Na4 Qa7 18. Rac1 Nd8 19. dxc5 bxc5 20. Be5 Rc8 21. Nh4 Ne6
22. Nf5 Ne4 23. Bxe4 dxe4 24. Qg4 h5 25. Qxh5 Bc6 26. Qg4 f6 27. Bd6 1-0

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "7"]
[White "Lengyel, Levente"]
[Black "Ivkov, Borislav"]
[Result "1/2-1/2"]
[PlyCount "36"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ 6. Bd2 Bxd2+ 7. Qxd2 d6 8.
O-O Nbd7 9. Nc3 Ne4 10. Nxe4 Bxe4 11. Ne1 Bxg2 12. Nxg2 O-O 13. e4 e5 14. Ne3
Re8 15. f3 a5 16. Nd5 exd4 17. Qxd4 Nc5 18. Nf4 Ne6 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "7"]
[White "Marovic, Drazen"]
[Black "Ree, Hans"]
[Result "0-1"]
[PlyCount "70"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5 h6 5. Bh4 c5 6. d5 d6 7. e3 Bxc3+ 8. bxc3
e5 9. Qc2 g5 10. Bg3 e4 11. h4 Rg8 12. hxg5 hxg5 13. f4 gxf4 14. Bxf4 Qe7 15.
Nh3 Nbd7 16. Nf2 Nf8 17. O-O-O Bf5 18. g3 O-O-O 19. Be2 Ng6 20. Bg5 Ne5 21. Bh4
Ng6 22. Bxf6 Qxf6 23. g4 Bd7 24. Nxe4 Qe7 25. Rhf1 Rge8 26. Nf6 Qxe3+ 27. Rd2
Re7 28. Kd1 Rh8 29. Nxd7 Kxd7 30. Qa4+ Kc7 31. Qa5+ Kb8 32. Rb2 Nf4 33. Rxf4
Qxf4 34. Rd2 b6 35. Qa4 Rh2 0-1

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "7"]
[White "Shamkovich, Leonid"]
[Black "Kuijpers, Frans"]
[Result "1-0"]
[PlyCount "141"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3
O-O 9. h3 Nb8 10. d4 Nbd7 11. Bg5 Bb7 12. Nbd2 Re8 13. Bc2 Bf8 14. Nh2 c5 15.
dxe5 dxe5 16. Ng4 Qb6 17. Nf3 Qd6 18. Qxd6 Bxd6 19. Rad1 Bc7 20. Rd2 Rac8 21.
Ne3 Nb6 22. Bxf6 gxf6 23. Ng4 Kg7 24. Nh4 Rcd8 25. Nf5+ Kg6 26. Rxd8 Rxd8 27.
Ngh6 Nc4 28. b3 Nd6 29. Re3 Nxf5 30. Nxf5 Bc8 31. Ne7+ Kg7 32. Rg3+ Kf8 33. Nd5
Bb8 34. Nxf6 Ke7 35. Nd5+ Kf8 36. c4 Rd6 37. Kf1 Be6 38. Ke2 f5 39. Rg5 h6 40.
Rh5 bxc4 41. bxc4 fxe4 42. Rxe5 Rc6 43. Rh5 Bf7 44. Rh4 Be5 45. Rxe4 Bd4 46. f4
Rc8 47. Kf3 Rb8 48. Bb3 a5 49. f5 Be8 50. Re2 a4 51. Bc2 Rb2 52. Be4 a3 53. Nf4
Ba4 54. Ne6+ Kf7 55. Rxb2 axb2 56. Nxd4 cxd4 57. Bb1 Bc6+ 58. Ke2 Bxg2 59. h4
Kf6 60. Kd2 Bc6 61. c5 Ke5 62. Kc2 Kxf5 63. Kxb2+ Kf4 64. Kb3 Ke3 65. Kc4 Be8
66. Kd5 d3 67. Bxd3 Kxd3 68. c6 Bh5 69. c7 Bg4 70. Kc6 Kc4 71. Kb7 1-0

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "8"]
[White "Bouwmeester, Hans"]
[Black "Marovic, Drazen"]
[Result "1/2-1/2"]
[PlyCount "41"]

1. d4 Nf6 2. c4 d6 3. Nc3 Nbd7 4. Nf3 g6 5. e4 e5 6. Be2 Bg7 7. O-O O-O 8. Re1
c6 9. Bf1 a5 10. Rb1 Re8 11. d5 Nc5 12. b3 cxd5 13. cxd5 Bd7 14. Nd2 Rf8 15.
Nc4 Qc7 16. Na3 Ne8 17. Nab5 Bxb5 18. Nxb5 Qd8 19. a3 f5 20. exf5 gxf5 21. Be3
1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "8"]
[White "Ciric, Dragoljub M"]
[Black "Bronstein, David I"]
[Result "1/2-1/2"]
[PlyCount "28"]

1. e4 g6 2. d4 Bg7 3. Nf3 c6 4. Nc3 d6 5. Be2 Nf6 6. O-O O-O 7. a4 a5 8. h3 Na6
9. Bf4 Nc7 10. Qc1 Bd7 11. Bh6 b5 12. e5 Nfd5 13. Ne4 b4 14. c4 bxc3 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "8"]
[White "Ivkov, Borislav"]
[Black "Jongsma, Lex"]
[Result "1/2-1/2"]
[PlyCount "28"]

1. c4 e5 2. Nc3 Nf6 3. g3 c6 4. Nf3 e4 5. Nd4 Qb6 6. Nb3 a5 7. e3 d5 8. h3 Nbd7
9. d4 exd3 10. cxd5 a4 11. Nd2 Nc5 12. dxc6 Be7 13. Bg2 bxc6 14. Nc4 Qc7
1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "8"]
[White "Kavalek, Lubomir"]
[Black "Lengyel, Levente"]
[Result "1-0"]
[PlyCount "95"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3
O-O 9. h3 Nd7 10. d4 Bf6 11. Be3 Na5 12. Bc2 Nc4 13. Bc1 c5 14. b3 Na5 15. d5
g6 16. a4 Nb6 17. b4 Nb7 18. a5 Nd7 19. Nbd2 Bg7 20. Nf1 f6 21. g4 Rf7 22. Be3
Nf8 23. Ng3 Rc7 24. Rb1 Bd7 25. Qe2 Rac8 26. Bd3 Qe8 27. Kh2 cxb4 28. cxb4 Nd8
29. Rg1 Nf7 30. Qd2 Kh8 31. Rg2 Qe7 32. Ne1 Be8 33. h4 Nd7 34. Nf3 Qf8 35. Rbg1
Bh6 36. g5 fxg5 37. hxg5 Bg7 38. Nh4 Nd8 39. Ne2 Bf7 40. Rg3 Qe8 41. Kg2 Bg8
42. Rh1 Nf8 43. Bb6 Rb7 44. Rc1 Qd7 45. Ng1 Rbb8 46. Be2 Rxc1 47. Qxc1 Rc8 48.
Rc3 1-0

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "8"]
[White "Kotov, Alexander"]
[Black "Bilek, Istvan"]
[Result "1-0"]
[PlyCount "105"]

1. d4 g6 2. e4 d6 3. c3 Bg7 4. Bg5 Nf6 5. Nd2 Nbd7 6. Bc4 c5 7. Ngf3 cxd4 8.
cxd4 d5 9. exd5 O-O 10. d6 exd6 11. O-O Nb6 12. Bb3 Bf5 13. Re1 Qd7 14. Nf1
Rfe8 15. Ne3 Be4 16. Nd2 Bc6 17. a4 Nfd5 18. a5 Nxe3 19. fxe3 Nd5 20. Nc4 Re4
21. Nd2 Rg4 22. Nf3 h6 23. Bxd5 Bxd5 24. Bf4 g5 25. h3 gxf4 26. hxg4 fxe3 27.
Nh4 Be6 28. Nf5 Bxf5 29. gxf5 Qxf5 30. Rxe3 Qf4 31. Rd3 Re8 32. Ra4 Re4 33. Qf1
Qh4 34. g3 Qe7 35. Qf3 d5 36. Rd2 Qd7 37. Ra3 Qe6 38. Rad3 f5 39. Kg2 Qg6 40.
Kh2 f4 41. gxf4 Qf5 42. Rg2 Rxf4 43. Qh3 Qxh3+ 44. Kxh3 Kf7 45. Rg4 Rf6 46. Rb3
b6 47. Rc3 Bf8 48. Rc7+ Ke6 49. a6 Rf3+ 50. Kg2 Rb3 51. Rxa7 Kf5 52. Rg8 Rxb2+
53. Kf1 1-0

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "8"]
[White "Kuijpers, Frans"]
[Black "Donner, Jan-Hein"]
[Result "1/2-1/2"]
[PlyCount "58"]

1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 exd5 5. Bb5+ Nc6 6. Qe2+ Be7 7. dxc5 Nf6 8.
Ngf3 O-O 9. Nb3 Ne4 10. O-O Nxc5 11. Nxc5 Bxc5 12. c3 Bg4 13. Qd3 Qd6 14. Bg5
h6 15. Bh4 f5 16. h3 Bxf3 17. Qxf3 g5 18. Bg3 f4 19. Bh2 Ne5 20. Qh5 a6 21. Ba4
Kg7 22. Bc2 Qf6 23. Rfe1 Rae8 24. Rad1 Re7 25. Kf1 Rd8 26. g3 fxg3 27. Bxg3 Nc4
28. Rxe7+ Bxe7 29. Kg2 Bd6 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "8"]
[White "Langeweg, Kick"]
[Black "Shamkovich, Leonid"]
[Result "1-0"]
[PlyCount "87"]

1. Nf3 c5 2. c4 Nc6 3. Nc3 Nf6 4. e3 e6 5. d4 d5 6. cxd5 exd5 7. Be2 cxd4 8.
Nxd4 Bd6 9. O-O O-O 10. Nf3 a6 11. b3 Bg4 12. Bb2 Bc7 13. Nd4 Qd6 14. g3 Bh3
15. Re1 Ne5 16. Bf1 Qd7 17. f3 Rfe8 18. Nce2 Bxf1 19. Rxf1 Bb6 20. Kg2 Ng6 21.
Qd3 Re5 22. Nf4 Rae8 23. Rae1 Nxf4+ 24. gxf4 Rh5 25. Rf2 Bc7 26. Rg1 g6 27. Kh1
Qh3 28. Ne2 Qe6 29. Ng3 Rh4 30. Re2 Bd8 31. Qd4 Qd7 32. Rc2 Re6 33. Qd3 Rc6 34.
Rd2 Ne8 35. Nf5 Rh5 36. Nd4 Rd6 37. Ba3 Rb6 38. Ne2 Bf6 39. Ng3 Rh4 40. Qxd5
Qxd5 41. Rxd5 Rc6 42. Rc1 Be7 43. Rxc6 bxc6 44. Bxe7 1-0

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "8"]
[White "Zuidema, Coen"]
[Black "Ree, Hans"]
[Result "1/2-1/2"]
[PlyCount "95"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Bc4 Qa5 8.
O-O O-O 9. Bb3 d6 10. h3 Bd7 11. f4 Nxd4 12. Bxd4 Bc6 13. Qd3 Rad8 14. Rad1 Nd7
15. Bxg7 Kxg7 16. Qd4+ Kg8 17. Nd5 Bxd5 18. Bxd5 Qc5 19. b4 Qxd4+ 20. Rxd4 Rc8
21. Bxb7 Rxc2 22. a4 Rb8 23. Bd5 Nf6 24. Bc4 Kg7 25. Ba6 Rb2 26. b5 Ra2 27. Rc1
Nh5 28. Rc7 Nxf4 29. Rb4 Kf6 30. Rxa7 Nd3 31. Rc4 Nc5 32. e5+ Kxe5 33. Rxe7+
Kd5 34. Rg4 f5 35. Rg3 Rh8 36. Bb7+ Nxb7 37. Rxb7 Rxa4 38. Rb3 Ra2 39. b6 Re8
40. Rxh7 Kc4 41. Rg3 Re1+ 42. Kh2 f4 43. Rc7+ Kd4 44. Rb3 Ree2 45. Rb4+ Kd3 46.
Rb3+ Kd4 47. Rb4+ Kd3 48. Rb3+ 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "9"]
[White "Bilek, Istvan"]
[Black "Ciric, Dragoljub M"]
[Result "1-0"]
[PlyCount "81"]

1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. d4 c5 6. Be2 cxd4 7. Nxd4 Nc6 8.
Be3 d6 9. O-O Bd7 10. f3 Ne8 11. Qd2 f5 12. exf5 gxf5 13. f4 Nf6 14. h3 Rc8 15.
Rad1 Kh8 16. Qc2 Nxd4 17. Bxd4 a6 18. Rf2 Qe8 19. Qd3 Qg6 20. Bf3 Bc6 21. Re1
Rfe8 22. Bxc6 Rxc6 23. Rfe2 Qf7 24. b3 e6 25. Kh1 Rcc8 26. Qf3 Qd7 27. a4 Rcd8
28. Re3 Rc8 29. Qe2 Nh5 30. Bxg7+ Nxg7 31. Rd1 Rc6 32. Red3 Qc7 33. Qd2 Rd8 34.
Ne2 Kg8 35. Nd4 Rc5 36. Rg3 Qf7 37. Qb4 Rdc8 38. Qb6 Qe7 39. Re1 Qh4 40. Ree3
Kh8 41. Rxg7 1-0

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "9"]
[White "Bronstein, David I"]
[Black "Ivkov, Borislav"]
[Result "1/2-1/2"]
[PlyCount "58"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 d6 6. Nbd2 Bb6 7. Bb3 Be6 8. Nc4
h6 9. a4 O-O 10. O-O Re8 11. Bc2 Nd7 12. a5 Bxc4 13. axb6 Be6 14. bxc7 Qxc7 15.
d4 Bg4 16. d5 Bxf3 17. Qxf3 Nd4 18. cxd4 Qxc2 19. Bxh6 Nf6 20. Qg3 Nh5 21. Qg4
g6 22. dxe5 Rxe5 23. f3 Qxb2 24. Be3 Re7 25. Qh4 Rc7 26. g4 Nf6 27. Rab1 Qe5
28. Rfd1 Nh7 29. Rbc1 Rxc1 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "9"]
[White "Donner, Jan-Hein"]
[Black "Langeweg, Kick"]
[Result "1/2-1/2"]
[PlyCount "42"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. Nf3 d5 7. O-O dxc4 8. Bxc4
Qe7 9. a3 Ba5 10. Bd3 Nbd7 11. Qc2 h6 12. Ne4 Bb6 13. Ng3 Rd8 14. Qe2 Nf8 15.
dxc5 Qxc5 16. Bd2 Qd6 17. Bc4 Bd7 18. e4 Bc6 19. Bc3 Qe7 20. Rfd1 Ng6 21. Nd4
Be8 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "9"]
[White "Jongsma, Lex"]
[Black "Kavalek, Lubomir"]
[Result "0-1"]
[PlyCount "126"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Bg5 c5 5. e3 O-O 6. Be2 d6 7. h3 Qa5 8. Qd2 e5
9. Nf3 exd4 10. exd4 Nc6 11. Be3 cxd4 12. Nxd4 Nxd4 13. Bxd4 Re8 14. Rd1 Bd7
15. O-O Bc6 16. Rfe1 Re6 17. Bf1 Rae8 18. Rxe6 Rxe6 19. Be3 a6 20. Bf4 Ne8 21.
Nd5 Qxa2 22. b4 Qxd2 23. Rxd2 Re1 24. f3 Kf8 25. Bg5 Bxd5 26. Rxd5 Re5 27. Rxe5
Bxe5 28. Bd2 Bd4+ 29. Kh2 Nc7 30. Kg3 Ke7 31. Kf4 f5 32. g4 Ne6+ 33. Kg3 f4+
34. Bxf4 Bc3 35. Be3 Bxb4 36. f4 a5 37. Bd3 a4 38. f5 gxf5 39. gxf5 Ng7 40. Bd4
Ne8 41. Be4 Bc5 42. Bc3 a3 43. Bb1 Nf6 44. Kf4 Nd7 45. Ke4 Nb6 46. Ba2 Na4 47.
Be1 Nb6 48. Bc3 Nd7 49. Bb1 Nb8 50. Kd5 Nc6 51. f6+ Kf7 52. Ke4 Bb4 53. Ba1 Be1
54. Kf4 Bh4 55. Kf5 Bg3 56. Ba2 Be5 57. c5+ Kf8 58. Bxe5 dxe5 59. Bc4 Nb4 60.
Kxe5 a2 61. Bxa2 Nxa2 62. Kd6 Nc3 63. Kc7 Ne4 0-1

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "9"]
[White "Lengyel, Levente"]
[Black "Kuijpers, Frans"]
[Result "1/2-1/2"]
[PlyCount "91"]

1. Nf3 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. O-O O-O 6. b3 c5 7. Bb2 Nc6 8. e3 b6
9. Nc3 Bb7 10. d3 Rc8 11. Qe2 Rc7 12. Rfd1 Rd7 13. cxd5 Nxd5 14. Nxd5 Rxd5 15.
d4 Rd7 16. dxc5 Bxc5 17. Ne5 Nxe5 18. Bxb7 Nd3 19. Bc3 Rxb7 20. Rxd3 Rd7 21.
Rad1 Rxd3 22. Rxd3 Qc8 23. Qg4 f6 24. Qc4 a6 25. Bd4 Bxd4 26. Rxd4 Qxc4 27.
Rxc4 Rb8 28. Rc7 Kf8 29. Kf1 a5 30. Ke2 b5 31. Ra7 a4 32. bxa4 bxa4 33. Rxa4
Rb2+ 34. Kf3 Kf7 35. h3 h5 36. Ra7+ Kg6 37. e4 Kh6 38. e5 fxe5 39. h4 Kg6 40.
a4 Ra2 41. a5 Ra3+ 42. Ke4 Ra2 43. Kf3 Ra3+ 44. Kg2 e4 45. a6 e3 46. fxe3
1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "9"]
[White "Marovic, Drazen"]
[Black "Kotov, Alexander"]
[Result "1-0"]
[PlyCount "59"]

1. d4 g6 2. c4 Bg7 3. Nc3 c5 4. d5 d6 5. g3 Na6 6. Bg2 Nc7 7. a4 Rb8 8. Nf3 a6
9. a5 b5 10. axb6 Rxb6 11. O-O Bd7 12. e4 e5 13. Ne1 Ne7 14. Nd3 O-O 15. Be3
Rb8 16. f4 exf4 17. Bxf4 Bd4+ 18. Kh1 Nc8 19. Bh6 Bg7 20. Bxg7 Kxg7 21. e5 dxe5
22. Nxe5 Nd6 23. b3 Nf5 24. Re1 Nd4 25. Ne4 Nxb3 26. Ra3 f5 27. Rxb3 Rxb3 28.
Nxc5 Ra3 29. Nexd7 Rf7 30. d6 1-0

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "9"]
[White "Ree, Hans"]
[Black "Bouwmeester, Hans"]
[Result "1/2-1/2"]
[PlyCount "67"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Qc7 7. Nf3 b6 8. a4
Ba6 9. Bxa6 Nxa6 10. O-O Ne7 11. Ng5 h6 12. Nh3 Nb8 13. Nf4 Nd7 14. Qg4 g6 15.
Ba3 h5 16. Qg5 Nf5 17. a5 Rc8 18. Rab1 Qd8 19. Qxd8+ Kxd8 20. dxc5 Kc7 21. Nd3
bxa5 22. Rb5 Ra8 23. Rxa5 Nb8 24. Nb4 Ne7 25. Rb1 Nec6 26. Rb5 a6 27. Rb6 Ra7
28. f4 a5 29. Na2 Nd7 30. R6b5 Rb8 31. c4 dxc4 32. Rxb8 Ndxb8 33. Nc3 Nd4 34.
c6 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "9"]
[White "Shamkovich, Leonid"]
[Black "Zuidema, Coen"]
[Result "1-0"]
[PlyCount "113"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5
Be6 9. c3 Be7 10. Qe2 O-O 11. Bc2 Qd7 12. Rd1 f5 13. Nbd2 Nxd2 14. Bxd2 Na5 15.
b3 Nb7 16. b4 a5 17. Nd4 c6 18. a4 axb4 19. cxb4 bxa4 20. Bxa4 Nd8 21. Rdc1 Qa7
22. Be3 Qb8 23. f4 Qxb4 24. Bxc6 Rxa1 25. Rxa1 Nxc6 26. Nxc6 Qb7 27. Qa6 Qc7
28. Rc1 Re8 29. Nb8 Bc5 30. Rxc5 Qxb8 31. h3 Qb3 32. Bf2 d4 33. Rc7 d3 34. Qa7
Bf7 35. Rd7 Qc4 36. Be3 Qa2 37. Qxa2 Bxa2 38. Rxd3 Be6 39. Ra3 Kf7 40. Bc5 Rd8
41. Bd6 Bd7 42. Ra7 Ke6 43. g4 g6 44. Kf2 Rc8 45. Kg3 h6 46. gxf5+ gxf5 47. Bc7
Bc6 48. Kh4 Bg2 49. Ra6+ Kf7 50. Rxh6 Kg7 51. Rh5 Rh8 52. Rxh8 Kxh8 53. Kg5
Bxh3 54. Kg6 Kg8 55. Bd6 Bf1 56. Kxf5 Kf7 57. e6+ 1-0

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "10"]
[White "Ciric, Dragoljub M"]
[Black "Marovic, Drazen"]
[Result "1-0"]
[PlyCount "85"]

1. e4 Nf6 2. e5 Nd5 3. Nc3 Nxc3 4. bxc3 d6 5. f4 Bf5 6. Nf3 e6 7. Be2 Nd7 8.
O-O d5 9. Nd4 Bg6 10. f5 exf5 11. e6 Nf6 12. exf7+ Kxf7 13. Nxf5 Bxf5 14. Rxf5
Qd7 15. Bg4 Qc6 16. Qf3 g6 17. Re5 Re8 18. d4 Bd6 19. Rxe8 Rxe8 20. Bg5 Be7 21.
Rf1 Kg7 22. Qf4 Bd8 23. Bc8 b6 24. g4 Re4 25. Bh6+ Kh8 26. Qf3 Qe8 27. g5 Ng8
28. Qf8 Qxf8 29. Rxf8 Be7 30. Re8 c5 31. Bd7 cxd4 32. cxd4 a5 33. c3 b5 34. Bc6
Bxg5 35. Rxe4 Bxh6 36. Re8 Kg7 37. Bxd5 Nf6 38. Re7+ Kh8 39. Bg2 Bd2 40. d5 Kg8
41. d6 Kf8 42. Bc6 Bxc3 43. Re8+ 1-0

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "10"]
[White "Ivkov, Borislav"]
[Black "Bilek, Istvan"]
[Result "1/2-1/2"]
[PlyCount "85"]

1. d4 g6 2. c4 d6 3. Nf3 Bg7 4. g3 c5 5. d5 Qa5+ 6. Bd2 Qa6 7. Qb3 Qb6 8. Qxb6
axb6 9. Nc3 Na6 10. a3 Bd7 11. e4 Nh6 12. Be2 O-O 13. O-O Nc7 14. Bf4 f6 15.
Rfe1 Nf7 16. Bf1 h6 17. Bd2 g5 18. h3 Ne5 19. Nxe5 fxe5 20. Kg2 Bf6 21. Be2 Be8
22. b4 Ra7 23. Reb1 Bg6 24. bxc5 bxc5 25. Rb3 Rb8 26. Rab1 h5 27. Bc1 Kg7 28.
Rb6 Be8 29. R6b3 Kg6 30. Bd3 Bd7 31. f4 gxf4 32. gxf4 Kf7 33. f5 Rg8+ 34. Kh2
Bc8 35. Be2 Rh8 36. Bd2 Bh4 37. Rf1 Ne8 38. Bd3 Rg8 39. Rg1 Rxg1 40. Kxg1 Bd7
41. Kg2 Nf6 42. Ne2 Ra8 43. Kf3 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "10"]
[White "Kavalek, Lubomir"]
[Black "Bronstein, David I"]
[Result "0-1"]
[PlyCount "81"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 b6 5. a3 Bf8 6. f4 Ne7 7. Nf3 Qd7 8. Be3
Nbc6 9. Bf2 Bb7 10. Bd3 O-O-O 11. b4 f6 12. Ne2 Kb8 13. c3 h6 14. h4 h5 15. Nc1
Nf5 16. Nb3 Nh6 17. a4 Ng4 18. a5 Ne7 19. Qd2 Nc8 20. O-O f5 21. Rfb1 b5 22. a6
Bc6 23. Nc5 Qe8 24. Ng5 Bd7 25. Ra5 c6 26. c4 dxc4 27. Bxc4 bxc4 28. Nb7 Nxf2
29. Qxf2 Be7 30. b5 cxb5 31. Nxe6 Bxh4 32. Qxh4 Bxe6 33. Nxd8 Qxd8 34. Raxb5+
Nb6 35. Qxd8+ Rxd8 36. Rxb6+ axb6 37. Rxb6+ Ka7 38. Rxe6 Rc8 39. Re7+ Kxa6 40.
Re6+ Kb5 41. Re7 0-1

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "10"]
[White "Kotov, Alexander"]
[Black "Ree, Hans"]
[Result "0-1"]
[PlyCount "78"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Bd3 Bb7 6. Nf3 O-O 7. O-O d5 8. cxd5
exd5 9. Ne2 Bd6 10. Ng3 g6 11. b3 Nbd7 12. Bb2 Qe7 13. Rc1 Ne4 14. Bb5 f5 15.
Ne2 Nb8 16. Ne5 a6 17. Bd3 c5 18. f3 Bxe5 19. dxe5 Ng5 20. h4 Ne6 21. Qe1 Nc6
22. Qg3 Rad8 23. h5 Qg5 24. Qxg5 Nxg5 25. Kf2 Ne6 26. hxg6 hxg6 27. g4 fxg4 28.
f4 Ne7 29. Rg1 d4 30. Bc4 Bd5 31. Rxg4 dxe3+ 32. Kxe3 Kf7 33. Bd3 Nf5+ 34. Bxf5
gxf5 35. Rg3 Be4 36. Rc3 Rh8 37. Bc1 Rh2 38. Rg1 Nc7 39. e6+ Kxe6 0-1

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "10"]
[White "Kuijpers, Frans"]
[Black "Jongsma, Lex"]
[Result "0-1"]
[PlyCount "34"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Bg7 5. Nc3 Nc6 6. Be3 Nf6 7. Bc4 d6 8. f3
Qb6 9. Bb5 Qc7 10. g4 e6 11. Qd2 h5 12. g5 Nd7 13. O-O-O a6 14. Be2 Na5 15. f4
Nb6 16. Ndb5 axb5 17. Nxb5 Nb3+ 0-1

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "10"]
[White "Langeweg, Kick"]
[Black "Lengyel, Levente"]
[Result "1/2-1/2"]
[PlyCount "49"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 Nxd5 6. e3 Nc6 7. Bd3 Be7 8. O-O
O-O 9. a3 cxd4 10. exd4 Bf6 11. Be4 Nce7 12. Qd3 g6 13. Bh6 Bg7 14. Bxg7 Kxg7
15. Rac1 Nxc3 16. Qxc3 Nd5 17. Bxd5 Qxd5 18. Qc5 Qxc5 19. Rxc5 Bd7 20. Ne5 Rfd8
21. Rc7 Be8 22. Rxb7 Rxd4 23. Nf3 Rd5 24. h4 h6 25. Rc1 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "10"]
[White "Shamkovich, Leonid"]
[Black "Donner, Jan-Hein"]
[Result "1/2-1/2"]
[PlyCount "52"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7 5. Bc4 Ngf6 6. Ng5 e6 7. Qe2 Nb6 8.
Bd3 h6 9. N5f3 c5 10. Be3 Nbd5 11. Ne5 Nxe3 12. fxe3 Bd6 13. Ngf3 Bxe5 14. Nxe5
cxd4 15. Bb5+ Nd7 16. O-O-O Qg5 17. Nxd7 Bxd7 18. Bxd7+ Kxd7 19. Rxd4+ Ke7 20.
Qf3 Rhd8 21. Qxb7+ Kf8 22. Rxd8+ Rxd8 23. Qe4 Qa5 24. a3 Qd2+ 25. Kb1 a5 26.
Rf1 Kg8 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "10"]
[White "Zuidema, Coen"]
[Black "Bouwmeester, Hans"]
[Result "1/2-1/2"]
[PlyCount "25"]

1. e4 e6 2. d4 d5 3. Nd2 c5 4. Ngf3 Nf6 5. exd5 Nxd5 6. Bb5+ Bd7 7. Bxd7+ Nxd7
8. O-O Be7 9. Ne4 O-O 10. Qe2 Qc7 11. dxc5 Nxc5 12. Nxc5 Bxc5 13. c4 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "11"]
[White "Bilek, Istvan"]
[Black "Kavalek, Lubomir"]
[Result "1/2-1/2"]
[PlyCount "27"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O f6 6. d4 Bg4 7. dxe5 Qxd1 8.
Rxd1 fxe5 9. Rd3 Bd6 10. Nbd2 Nf6 11. b3 O-O-O 12. Bb2 Bxf3 13. Nxf3 Nxe4 14.
Re3 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "11"]
[White "Bouwmeester, Hans"]
[Black "Kotov, Alexander"]
[Result "1/2-1/2"]
[PlyCount "150"]

1. d4 d6 2. c4 g6 3. Nc3 Bg7 4. e4 Nc6 5. Be3 e5 6. d5 Nb8 7. Be2 Nd7 8. g4 Bh6
9. Bxh6 Nxh6 10. Qd2 Ng8 11. O-O-O Nc5 12. h4 Nf6 13. f3 h5 14. g5 Nh7 15. f4
exf4 16. Qxf4 O-O 17. e5 dxe5 18. Qxe5 Re8 19. Qd4 Qe7 20. Nh3 Qe3+ 21. Qxe3
Rxe3 22. Nf4 Bf5 23. Rhf1 Rae8 24. Kd2 f6 25. Ne6 Bxe6 26. Kxe3 Bh3+ 27. Kd4
Bxf1 28. Rxf1 Nd7 29. gxf6 Nhxf6 30. c5 Kg7 31. b4 Ne5 32. b5 b6 33. cxb6 axb6
34. a4 Nf7 35. Bd3 Nd6 36. Ne2 Nf5+ 37. Bxf5 Rxe2 38. Rg1 Rd2+ 39. Kc3 Rxd5 40.
Bxg6 Kf8 41. Rg5 Ke7 42. Kc4 Rd1 43. Bxh5 Rh1 44. Bg6 Rxh4+ 45. Kb3 Nd7 46. Bc2
Nc5+ 47. Kc3 Rh3+ 48. Kb2 Re3 49. Rd5 Ke6 50. Rd8 Rg3 51. Rc8 Kd7 52. Rh8 Nb7
53. Rh6 Na5 54. Rg6 Rf3 55. Rh6 Nc4+ 56. Ka2 Ra3+ 57. Kb1 Rf3 58. Ka2 Ne5 59.
Kb2 Ng4 60. Rc6 Ne5 61. Rh6 Nc4+ 62. Ka2 Na5 63. Kb2 Nb7 64. Rg6 Nc5 65. Rh6
Ne6 66. Rg6 Nd4 67. Rg4 Ne6 68. Rg6 Ke7 69. Rh6 Rf2 70. Kc3 Nf4 71. Rc6 Ne6 72.
Rc4 Kd6 73. Kb4 Nf4 74. a5 Nd5+ 75. Ka4 Rf1 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "11"]
[White "Bronstein, David I"]
[Black "Kuijpers, Frans"]
[Result "1-0"]
[PlyCount "117"]

1. d4 d5 2. c4 e6 3. Nc3 Be7 4. cxd5 exd5 5. Bf4 c6 6. e3 Bf5 7. g4 Be6 8. h3
Nf6 9. Bd3 c5 10. Nf3 Nc6 11. Kf1 Rc8 12. Kg2 O-O 13. dxc5 Bxc5 14. Ne2 Ne4 15.
Rc1 Be7 16. Nfd4 Nxd4 17. Nxd4 Qb6 18. Qb3 Qxb3 19. axb3 Nc5 20. Bc2 Rfd8 21.
b4 Na6 22. b5 Nb4 23. Bf5 Bxf5 24. Nxf5 Bf8 25. Ra1 a6 26. bxa6 bxa6 27. Rhd1
g6 28. Nd4 Re8 29. Rd2 f6 30. Ne2 Kf7 31. Nc3 Rc5 32. Rad1 Ke6 33. h4 f5 34.
gxf5+ gxf5 35. Bg3 Bg7 36. Ne2 Kd7 37. Nf4 Kc6 38. Kf3 Re7 39. Ne2 Re4 40. Bf4
Bf6 41. Ng3 Bxh4 42. Nxf5 Bf6 43. Rh1 Kb6 44. Rxh7 Rc6 45. Rf7 a5 46. Ng3 Re7
47. Rxe7 Bxe7 48. Be5 Kb5 49. Nf5 Bc5 50. b3 Rc8 51. Kf4 Rg8 52. Bd4 Rg1 53.
Ke5 Rb1 54. Bxc5 Kxc5 55. Nd4 Re1 56. Ke6 Rc1 57. Kd7 Kb6 58. f4 Na6 59. Kd6
1-0

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "11"]
[White "Donner, Jan-Hein"]
[Black "Zuidema, Coen"]
[Result "1/2-1/2"]
[PlyCount "129"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Nge2 Ba6 6. Ng3 O-O 7. e4 d5 8. cxd5
Bxc3+ 9. bxc3 Bxf1 10. Kxf1 exd5 11. e5 Ne4 12. Ne2 f6 13. f3 fxe5 14. Kg1 Nd6
15. dxe5 Nc4 16. Nf4 Re8 17. e6 c6 18. Qd4 Qf6 19. Be3 Nxe3 20. Qxe3 Na6 21.
Re1 Nc5 22. Qe5 Re7 23. Qxf6 gxf6 24. h4 Rae8 25. Nh5 Rf8 26. Nf4 Rfe8 27. Nh5
Rf8 28. Nf4 Kg7 29. g4 Rfe8 30. Nh5+ Kg6 31. Nf4+ Kg7 32. Nh5+ Kh8 33. Nxf6
Rxe6 34. Rxe6 Rxe6 35. g5 Re1+ 36. Kg2 Rxh1 37. Kxh1 Na4 38. f4 Nxc3 39. Kg2
Nxa2 40. f5 Nc3 41. Nd7 Ne4 42. f6 Kg8 43. Kf3 Nc5 44. Ne5 a5 45. Nxc6 a4 46.
Ne7+ Kf7 47. Nxd5 a3 48. Nb4 Na6 49. Nc2 a2 50. Ke3 Nc5 51. h5 b5 52. g6+ hxg6
53. hxg6+ Kxg6 54. Kd4 Na4 55. Kd5 Kxf6 56. Kc6 Nc3 57. Kc5 Ke5 58. Kb4 Ne2 59.
Ka3 Nd4 60. Na1 Kd5 61. Kxa2 Kc4 62. Kb2 Kb4 63. Ka2 Ka4 64. Kb2 b4 65. Ka2
1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "11"]
[White "Jongsma, Lex"]
[Black "Langeweg, Kick"]
[Result "0-1"]
[PlyCount "64"]

1. e4 c5 2. Nf3 d6 3. g3 Nc6 4. Bg2 g6 5. O-O Bg7 6. c3 e5 7. d3 Nge7 8. Nbd2
O-O 9. a4 h6 10. Nc4 Be6 11. b4 cxb4 12. cxb4 Nxb4 13. Ba3 Nec6 14. Qd2 a5 15.
Rfb1 b6 16. Ne1 Rc8 17. Rc1 f5 18. exf5 gxf5 19. Rab1 d5 20. Ne3 Rf7 21. Bh3
Qf6 22. Bxb4 Nxb4 23. Rxb4 axb4 24. Nxd5 Qd8 25. Rxc8 Qxc8 26. Bg2 b3 27. Nxb6
Qc5 28. Nc4 e4 29. Bf1 Bxc4 30. dxc4 b2 31. Qc2 Rb7 32. Qb1 Rb3 0-1

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "11"]
[White "Lengyel, Levente"]
[Black "Shamkovich, Leonid"]
[Result "1-0"]
[PlyCount "81"]

1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 Qe7 5. g3 O-O 6. Bg2 Bxd2+ 7. Qxd2 d6 8.
Nc3 e5 9. O-O Nc6 10. d5 Nb8 11. e4 a5 12. Qc2 Na6 13. a3 Ne8 14. Ne1 Nc5 15.
Nd3 Nxd3 16. Qxd3 a4 17. Rae1 g6 18. f4 f6 19. f5 g5 20. Bf3 Bd7 21. Bd1 Ng7
22. Bc2 Ra6 23. Qd1 Qe8 24. Rf2 Ra5 25. h4 h6 26. hxg5 hxg5 27. Rh2 Kf7 28. Rh7
Rg8 29. Kg2 Ke7 30. Reh1 Kd8 31. R1h6 Qf8 32. g4 Rc5 33. Bxa4 Bc8 34. Bb5 Bd7
35. b4 Bxb5 36. bxc5 Ba6 37. c6 bxc6 38. Qa4 Bc8 39. Qxc6 Ne8 40. a4 Rg7 41. a5
1-0

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "11"]
[White "Marovic, Drazen"]
[Black "Ivkov, Borislav"]
[Result "1/2-1/2"]
[PlyCount "34"]

1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 Bg4 5. Bxc4 e6 6. Nc3 a6 7. h3 Bh5 8. O-O
Nc6 9. Be2 Bd6 10. b3 O-O 11. Bb2 Qe8 12. Nd2 Bg6 13. Nc4 Bb4 14. Bf3 Rd8 15.
Bxc6 Qxc6 16. Ne5 Qe8 17. Nxg6 hxg6 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "11"]
[White "Ree, Hans"]
[Black "Ciric, Dragoljub M"]
[Result "1/2-1/2"]
[PlyCount "38"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. f4 Nc6 7. Be3 Be7 8. Qf3
e5 9. fxe5 Nxe5 10. Bb5+ Bd7 11. Bxd7+ Qxd7 12. Qe2 O-O 13. O-O d5 14. Nf5 dxe4
15. Qb5 Nc6 16. Nxe7+ Nxe7 17. Qxd7 Nxd7 18. Rad1 Ne5 19. Nxe4 N7c6 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "12"]
[White "Ciric, Dragoljub M"]
[Black "Bouwmeester, Hans"]
[Result "1-0"]
[PlyCount "67"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3
O-O 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Nc6 13. dxc5 dxc5 14. Nf1 Be6 15.
Ne3 Rad8 16. Qe2 c4 17. Nf5 Bxf5 18. exf5 Rfe8 19. Bg5 h6 20. Bxf6 Bxf6 21. Be4
Nb8 22. h4 Qe7 23. a4 Rc8 24. axb5 axb5 25. g3 Qc5 26. Kg2 Be7 27. g4 f6 28.
Rg1 Nd7 29. Kh1 Red8 30. Ra6 Kf7 31. g5 hxg5 32. Nxg5+ fxg5 33. Qh5+ Kg8 34.
hxg5 1-0

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "12"]
[White "Donner, Jan-Hein"]
[Black "Lengyel, Levente"]
[Result "1/2-1/2"]
[PlyCount "38"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. Nf3 d5 7. O-O Nc6 8. a3
dxc4 9. Bxc4 Ba5 10. Bd3 cxd4 11. exd4 Bb6 12. Be3 Qd6 13. Qd2 Nd5 14. Nxd5
Qxd5 15. Rfe1 Bd7 16. Rad1 Rac8 17. Bc2 Qh5 18. Ng5 h6 19. Ne4 Ne7 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "12"]
[White "Ivkov, Borislav"]
[Black "Ree, Hans"]
[Result "0-1"]
[PlyCount "90"]

1. c4 e5 2. Nc3 Nf6 3. g3 Bb4 4. Bg2 O-O 5. e4 c6 6. Nge2 d5 7. cxd5 cxd5 8.
Nxd5 Nxd5 9. exd5 Bf5 10. O-O Nd7 11. d3 Re8 12. Be3 Nf6 13. Qb3 a5 14. h3 Qd7
15. Kh2 Be7 16. a4 h5 17. Rad1 Bb4 18. Nc3 Rac8 19. Nb5 h4 20. Bd2 Bc5 21. Bxa5
e4 22. d4 Bf8 23. Rc1 Nxd5 24. Rxc8 Rxc8 25. Re1 Nf6 26. Qd1 Bg6 27. Bd2 Qf5
28. Be3 Bb4 29. Rf1 Qe6 30. Bd2 hxg3+ 31. Kxg3 Bxd2 32. Qxd2 Nd5 33. Kh2 e3 34.
fxe3 Rc2 35. Qa5 b6 36. Qa8+ Kh7 37. Qd8 f6 38. Na3 Rxg2+ 39. Kxg2 Nxe3+ 40.
Kf2 Nxf1 41. Kxf1 Qxh3+ 42. Kf2 Qh2+ 43. Ke3 Qxb2 44. Qd6 Qc3+ 45. Kf2 Qd2+ 0-1

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "12"]
[White "Kavalek, Lubomir"]
[Black "Marovic, Drazen"]
[Result "1-0"]
[PlyCount "67"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. Nce2 c5 6. c3 Nc6 7. f4 Qb6 8. Nf3
f6 9. g3 cxd4 10. cxd4 Bb4+ 11. Bd2 Bxd2+ 12. Qxd2 O-O 13. Bg2 a5 14. O-O a4
15. Kh1 Na5 16. Qc3 Qb5 17. Rf2 Ra6 18. Qc2 Nc4 19. Nc3 Qa5 20. Re1 fxe5 21.
fxe5 Qd8 22. h4 h6 23. b3 axb3 24. axb3 Na5 25. Nb5 Rc6 26. Qd3 b6 27. Na3 Rf7
28. Bf1 Qf8 29. Nb5 Ba6 30. Qe3 Bxb5 31. Bxb5 Rc7 32. Ref1 Qb4 33. Ng5 Rxf2 34.
Qxf2 1-0

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "12"]
[White "Kuijpers, Frans"]
[Black "Bilek, Istvan"]
[Result "1/2-1/2"]
[PlyCount "49"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 O-O 8.
O-O Nbd7 9. Nb3 b6 10. f3 Bb7 11. Qd2 Rc8 12. a4 a6 13. Rfd1 Ne5 14. Bd4 Nc6
15. Bf2 Nd7 16. Nd5 Bxb2 17. Rab1 Bg7 18. Nc1 Ncb8 19. Nxb6 Nxb6 20. Bxb6 Qd7
21. a5 Qc6 22. Bd4 Bxd4+ 23. Qxd4 Nd7 24. Bd3 Rc7 25. Ne2 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "12"]
[White "Langeweg, Kick"]
[Black "Bronstein, David I"]
[Result "1/2-1/2"]
[PlyCount "38"]

1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. d4 c6 7. Nc3 Qa5 8. h3 e5
9. d5 cxd5 10. cxd5 Bd7 11. Rb1 Na6 12. a3 Nc7 13. e4 Nb5 14. Nxb5 Bxb5 15. Re1
Rfc8 16. Bg5 h6 17. Bd2 Qa6 18. Rc1 Qa4 19. Qxa4 Bxa4 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "12"]
[White "Shamkovich, Leonid"]
[Black "Jongsma, Lex"]
[Result "1-0"]
[PlyCount "93"]

1. e4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e5 6. Ndb5 d6 7. Bg5 a6 8.
Bxf6 gxf6 9. Na3 d5 10. Nxd5 Bxa3 11. bxa3 Be6 12. Bc4 Qa5+ 13. Qd2 O-O-O 14.
Rd1 Qxa3 15. O-O Rhg8 16. Qe3 Qxe3 17. fxe3 Rg4 18. Bd3 f5 19. Nf6 Rh4 20. exf5
Bxa2 21. Be4 Bc4 22. Rxd8+ Kxd8 23. Rd1+ Kc8 24. g3 Rh6 25. Ng8 Rh5 26. h4 Kc7
27. Kf2 a5 28. Ra1 f6 29. Nxf6 Rh6 30. Nd5+ Bxd5 31. Bxd5 b6 32. Kf3 Nb4 33.
Be6 Kd6 34. c3 Na6 35. Rd1+ Kc6 36. Ke4 Nc5+ 37. Kxe5 b5 38. Rd8 b4 39. cxb4
axb4 40. Rb8 b3 41. Kd4 Nxe6+ 42. fxe6 Rxe6 43. Rxb3 h5 44. e4 Rg6 45. Ke5 Rg4
46. Rd3 Kc7 47. Kf5 1-0

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "12"]
[White "Zuidema, Coen"]
[Black "Kotov, Alexander"]
[Result "0-1"]
[PlyCount "72"]

1. e4 d6 2. d4 g6 3. Nc3 Bg7 4. f4 a6 5. Nf3 b5 6. Be3 Bb7 7. Bd3 Nd7 8. a4 b4
9. Nb1 c5 10. c3 Ngf6 11. Nbd2 bxc3 12. bxc3 O-O 13. Rb1 Rb8 14. O-O Ng4 15.
Nc4 d5 16. exd5 Bxd5 17. Qe2 Rxb1 18. Rxb1 Nxe3 19. Nxe3 Bxf3 20. Qxf3 cxd4 21.
cxd4 Bxd4 22. Kh1 Nc5 23. Bc4 Qa5 24. Ng4 Bg7 25. Qc6 Rd8 26. h3 e6 27. Rf1 Qb4
28. Bxa6 Ne4 29. Rf3 Nd2 30. Qc7 Rf8 31. Rd3 Qb1+ 32. Kh2 Nf1+ 33. Kg1 Ng3+ 34.
Kf2 Ne4+ 35. Kf3 Qf1+ 36. Kxe4 Qe2+ 0-1

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "13"]
[White "Bilek, Istvan"]
[Black "Langeweg, Kick"]
[Result "0-1"]
[PlyCount "82"]

1. g3 d5 2. Bg2 g6 3. f4 Bg7 4. Nf3 c5 5. O-O Nc6 6. d3 d4 7. c4 Nh6 8. Na3 Nf5
9. Nc2 O-O 10. Qe1 a5 11. a3 a4 12. Rb1 Ra6 13. Nd2 Bd7 14. Ne4 b6 15. h3 Nd6
16. Nxd6 exd6 17. Kh2 Na5 18. b4 axb3 19. Na1 Be6 20. g4 f5 21. gxf5 Rxf5 22.
Nxb3 Nxb3 23. Rxb3 d5 24. e4 dxe3 25. Qxe3 Qd7 26. cxd5 Bxd5 27. Bxd5+ Rxd5 28.
Re1 Kf7 29. Re2 b5 30. Qf3 Rad6 31. Re3 Rf5 32. Re4 h6 33. Kg2 Rfd5 34. Re3 Kg8
35. Qe2 Bf6 36. Qg4 Qf7 37. Rxb5 Rxd3 38. Rxd3 Rxd3 39. Qc8+ Kh7 40. Rb7 Be7
41. Qxc5 Qa2+ 0-1

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "13"]
[White "Bouwmeester, Hans"]
[Black "Ivkov, Borislav"]
[Result "1/2-1/2"]
[PlyCount "82"]

1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. e4 e5 5. d5 Nd7 6. g3 Ne7 7. Bg2 O-O 8. Nge2 f5
9. O-O Nf6 10. f3 c6 11. h3 cxd5 12. cxd5 Qb6+ 13. Kh2 Bd7 14. Qd3 Rfc8 15. Be3
Qb4 16. Qd2 Kh8 17. a3 Qa5 18. Rfc1 Neg8 19. b4 Qd8 20. Nd1 a6 21. Rxc8 Rxc8
22. Rc1 h5 23. Rxc8 Qxc8 24. Qc1 Qxc1 25. Bxc1 Kh7 26. Nec3 Ne8 27. Bf1 Ngf6
28. Kg2 Bh6 29. Bxh6 Kxh6 30. Nf2 Nc7 31. h4 g5 32. hxg5+ Kxg5 33. exf5 Bxf5
34. Nce4+ Nxe4 35. fxe4 Bd7 36. Kf3 Bb5 37. Bh3 b6 38. Nd1 a5 39. Bc8 axb4 40.
axb4 Bc4 41. Ne3 Bd3 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "13"]
[White "Bronstein, David I"]
[Black "Shamkovich, Leonid"]
[Result "1-0"]
[PlyCount "81"]

1. c4 e5 2. Nc3 Nc6 3. Nf3 d6 4. d4 exd4 5. Nxd4 Nxd4 6. Qxd4 Ne7 7. b3 Nc6 8.
Qd2 Be7 9. Nd5 Bf6 10. Nxf6+ Qxf6 11. Bb2 Qg6 12. h4 h6 13. h5 Qh7 14. Qc3 f6
15. g3 O-O 16. Bg2 Re8 17. Rh4 Bf5 18. f3 Bd7 19. g4 Ne5 20. O-O-O Bc6 21. e4
a5 22. Rhh1 Kh8 23. Rhe1 a4 24. Bh3 axb3 25. axb3 Nf7 26. Bf1 Ne5 27. Qe3 Nf7
28. Bd3 Ne5 29. Bc2 Qg8 30. Rg1 Qe6 31. Rde1 Nf7 32. f4 b5 33. cxb5 Bxb5 34. e5
dxe5 35. Qe4 Kg8 36. fxe5 Nxe5 37. Bxe5 fxe5 38. Qh7+ Kf8 39. Rgf1+ Bxf1 40.
Rxf1+ Ke7 41. Qxg7+ 1-0

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "13"]
[White "Jongsma, Lex"]
[Black "Donner, Jan-Hein"]
[Result "1/2-1/2"]
[PlyCount "84"]

1. Nf3 c5 2. b3 Nc6 3. Bb2 d6 4. d4 cxd4 5. Nxd4 Nf6 6. g3 e5 7. Nxc6 bxc6 8.
Bg2 Qc7 9. O-O Be7 10. c4 O-O 11. Nc3 Be6 12. Qd2 Nd7 13. Rac1 Rab8 14. Nd5
Bxd5 15. cxd5 c5 16. e4 a5 17. Bc3 Rb5 18. Rfe1 Ra8 19. Bf1 Rb7 20. Qc2 Bg5 21.
Rb1 g6 22. a4 Rf8 23. Bd3 Qd8 24. Rf1 Ra7 25. Rbe1 Qe7 26. Kh1 Nf6 27. f4 exf4
28. gxf4 Bh6 29. Qg2 Nh5 30. Qg4 Bg7 31. e5 Qd8 32. Bc4 Re7 33. Rf3 Rfe8 34.
Rg1 dxe5 35. fxe5 Rxe5 36. Bxe5 Rxe5 37. Rd1 Nf6 38. Qh4 Qd6 39. Rdf1 Ne4 40.
Rxf7 Rh5 41. Qf4 Be5 42. Rf8+ Kg7 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "13"]
[White "Kotov, Alexander"]
[Black "Ciric, Dragoljub M"]
[Result "1-0"]
[PlyCount "163"]

1. d4 Nf6 2. c4 c5 3. d5 d6 4. Nc3 g6 5. e4 Bg7 6. Bd3 e6 7. Nge2 exd5 8. cxd5
O-O 9. O-O Ne8 10. Bf4 Nd7 11. Qc1 Ne5 12. Bc2 Nc7 13. Bh6 Bxh6 14. Qxh6 b5 15.
f4 Ng4 16. Qh3 f5 17. Rae1 b4 18. exf5 gxf5 19. Nd1 Qf6 20. Qg3 Kh8 21. h3 Nh6
22. Ne3 Bb7 23. Qg5 Nxd5 24. Nxd5 Bxd5 25. Ng3 Rf7 26. b3 Qd4+ 27. Rf2 Rg8 28.
Rd1 Qxd1+ 29. Bxd1 Rxg5 30. fxg5 f4 31. Nh5 Nf5 32. Nxf4 Ne3 33. Bh5 Rf5 34. h4
Bc6 35. g4 Re5 36. g6 h6 37. Nd3 Rd5 38. Rf8+ Kg7 39. Rf7+ Kg8 40. Nf4 Re5 41.
Rc7 Bf3 42. Rc8+ Kg7 43. Rc7+ Kg8 44. g5 hxg5 45. Rc8+ Kg7 46. Rc7+ Kg8 47.
Bxf3 gxf4 48. Kf2 Nf5 49. h5 Re7 50. Rc8+ Kg7 51. Bd5 Ng3 52. Rg8+ Kh6 53. Rh8+
Kg5 54. Bf3 Rg7 55. Rh7 Kf6 56. Rh8 Kg5 57. Ke1 Nf5 58. Kd2 a5 59. Kd3 Re7 60.
Be4 Nh6 61. Rh7 Rxh7 62. gxh7 Nf7 63. Bd5 Nh8 64. Ke4 Kxh5 65. Kxf4 Kg6 66.
Be4+ Kf6 67. Kg4 Nf7 68. Kf4 Kg7 69. Kf5 Ne5 70. Ke6 Ng4 71. Kxd6 Ne3 72. Kxc5
Nd1 73. Kd4 Nf2 74. Bg6 Nd1 75. Bc2 Nf2 76. Kc4 Ng4 77. Kb5 Ne3 78. Bd3 Nd5 79.
Kxa5 Kh8 80. Kb5 Kg7 81. Kc4 Nc3 82. a4 1-0

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "13"]
[White "Lengyel, Levente"]
[Black "Zuidema, Coen"]
[Result "1-0"]
[PlyCount "86"]

1. Nf3 Nf6 2. c4 e6 3. Nc3 d5 4. d4 Be7 5. Bg5 O-O 6. e3 h6 7. Bh4 b6 8. Bd3
dxc4 9. Bxc4 Bb7 10. O-O Ne4 11. Nxe4 Bxe4 12. Bg3 Bd6 13. Qe2 Bxg3 14. hxg3
Nd7 15. Bb5 c6 16. Ba4 Qe7 17. Rfc1 Rfc8 18. Nd2 Qb4 19. Qd1 b5 20. Nxe4 Qxa4
21. Qxa4 bxa4 22. Rc4 Nb6 23. Rc2 Rab8 24. Nc5 Kf8 25. Rac1 Ke8 26. Nd3 Nd5 27.
Rc4 a3 28. b3 a5 29. Ra4 Nb4 30. Nxb4 axb4 31. Rc4 c5 32. dxc5 Rb5 33. Raxb4
Rxb4 34. Rxb4 Rxc5 35. Ra4 Rc1+ 36. Kh2 Rc2 37. Rxa3 Rxf2 38. e4 Ke7 39. e5 Re2
40. Ra7+ Kf8 41. b4 g5 42. b5 Rb2 43. a4 Kg7 1-0

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "13"]
[White "Marovic, Drazen"]
[Black "Kuijpers, Frans"]
[Result "1-0"]
[PlyCount "107"]

1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. cxd5 exd5 6. Bg5 c6 7. Qc2 g6 8. e3
Bf5 9. Bd3 Bxd3 10. Qxd3 Nbd7 11. O-O O-O 12. Rab1 a5 13. Qc2 Bd6 14. a3 Re8
15. Rfe1 Qc7 16. Rec1 Qb8 17. Bxf6 Nxf6 18. g3 Qd8 19. Kg2 Qe7 20. Nd2 Ne4 21.
Re1 f5 22. f3 Nxd2 23. Qxd2 Qg5 24. Re2 Re6 25. Rbe1 Rae8 26. Nd1 b6 27. Nf2 h5
28. Qc3 Bc7 29. b4 axb4 30. axb4 h4 31. f4 Qh5 32. Nh3 Bd8 33. Rf2 Kg7 34. b5
Rh8 35. Rh1 cxb5 36. Qb3 Be7 37. Rf3 Rc6 38. Qxd5 Rc2+ 39. Rf2 Rxf2+ 40. Kxf2
Rc8 41. Qa2 Qg4 42. Kg2 Rh8 43. Qc2 b4 44. Ng1 Ra8 45. Nf3 Bf6 46. Rb1 Ra3 47.
Rb3 g5 48. Rxa3 bxa3 49. Qc7+ Kf8 50. Qxb6 Be7 51. d5 hxg3 52. Qh6+ Ke8 53. h3
a2 54. Qh8+ 1-0

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "13"]
[White "Ree, Hans"]
[Black "Kavalek, Lubomir"]
[Result "0-1"]
[PlyCount "66"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3
h6 9. Bh4 Nbd7 10. O-O-O Qc7 11. Bd3 g5 12. fxg5 Ne5 13. Qe2 Nh7 14. Rhf1 hxg5
15. Bg3 Nf8 16. Qf2 Nfg6 17. Nf3 Rh7 18. Na4 Bd8 19. Qd4 Bd7 20. Nc3 Qb6 21.
Be2 Qxd4 22. Rxd4 Be7 23. Na4 Bc6 24. Nb6 Rd8 25. Nd2 Nf4 26. Rf2 d5 27. exd5
Bc5 28. dxc6 Bxd4 29. c7 Bxf2 30. Bxf2 Nxe2+ 31. Kd1 Nf4 32. cxd8=Q+ Kxd8 33.
Ne4 Rxh2 0-1

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "14"]
[White "Donner, Jan-Hein"]
[Black "Bronstein, David I"]
[Result "1/2-1/2"]
[PlyCount "20"]

1. d4 Nf6 2. c4 g6 3. g3 c6 4. Bg2 d5 5. Nd2 Bg7 6. Ngf3 O-O 7. O-O Na6 8. b3
c5 9. Bb2 cxd4 10. Bxd4 Nb4 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "14"]
[White "Ivkov, Borislav"]
[Black "Kotov, Alexander"]
[Result "0-1"]
[PlyCount "85"]

1. d4 d6 2. c4 g6 3. Nc3 Bg7 4. Nf3 Bg4 5. e3 Nc6 6. Be2 e5 7. d5 Nce7 8. e4
Nf6 9. O-O O-O 10. Ne1 Bxe2 11. Qxe2 c5 12. Nd3 Nd7 13. Be3 f5 14. f3 Nf6 15.
a3 b6 16. b4 Qd7 17. Rab1 f4 18. Bd2 g5 19. bxc5 bxc5 20. Rb3 Ng6 21. Rfb1 Rf7
22. Qd1 Bf8 23. Be1 Rg7 24. R3b2 g4 25. fxg4 Nxg4 26. Rb7 Qc8 27. Rxg7+ Bxg7
28. Bf2 Kh8 29. Qa4 Nxf2 30. Nxf2 Nh4 31. Qd1 f3 32. g3 Bh6 33. Qd3 Qg8 34. Kf1
Rf8 35. Ncd1 Ng2 36. Rb2 Qg5 37. Qb1 Qh5 38. Kg1 Nf4 39. Kh1 Ne2 40. g4 Qg5 41.
Qd3 Qh4 42. Rxe2 fxe2 43. Qxe2 0-1

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "14"]
[White "Kavalek, Lubomir"]
[Black "Bouwmeester, Hans"]
[Result "1/2-1/2"]
[PlyCount "22"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Qc7 7. Nf3 Ne7 8. a4
b6 9. Bb5+ Bd7 10. O-O Bxb5 11. axb5 a5 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "14"]
[White "Kuijpers, Frans"]
[Black "Ree, Hans"]
[Result "1/2-1/2"]
[PlyCount "23"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Bc4 Qa5 8.
O-O O-O 9. Bb3 d6 10. h3 Bd7 11. f4 Rac8 12. Nf3 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "14"]
[White "Langeweg, Kick"]
[Black "Marovic, Drazen"]
[Result "1/2-1/2"]
[PlyCount "82"]

1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. d4 d6 6. Nc3 Nc6 7. d5 Na5 8. b3 c6
9. Bb2 cxd5 10. cxd5 Bd7 11. O-O Qb6 12. Qd2 Rfc8 13. Rfc1 Rc7 14. Ne1 Rac8 15.
Nd3 Ng4 16. Nd1 Bb5 17. Bxg7 Kxg7 18. Rxc7 Rxc7 19. Rc1 Nf6 20. Ne3 Bxd3 21.
Rxc7 Qxc7 22. Qxd3 Qc1+ 23. Qd1 Qxd1+ 24. Nxd1 Ne8 25. Nb2 b6 26. e4 Nc7 27.
Bf1 e6 28. b4 Nb7 29. Bc4 Kf6 30. Nd3 Ke7 31. f3 Nd8 32. Kf2 e5 33. f4 f6 34.
Ke3 Nf7 35. a3 Nd8 36. Ne1 Nf7 37. Nc2 Nd8 38. b5 Nb7 39. Nb4 Na5 40. Nc6+ Nxc6
41. dxc6 Kf8 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "14"]
[White "Lengyel, Levente"]
[Black "Jongsma, Lex"]
[Result "1/2-1/2"]
[PlyCount "29"]

1. d4 Nf6 2. c4 Nc6 3. d5 Ne5 4. e4 e6 5. Qd4 Bb4+ 6. Bd2 Bxd2+ 7. Nxd2 d6 8.
f4 Ng6 9. Qf2 exd5 10. cxd5 O-O 11. O-O-O c6 12. dxc6 bxc6 13. Ne2 Rb8 14. Nc3
d5 15. exd5 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "14"]
[White "Shamkovich, Leonid"]
[Black "Bilek, Istvan"]
[Result "1/2-1/2"]
[PlyCount "138"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 d5 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Bg4 8.
Be3 Nfd7 9. Rd1 Nc6 10. Qb3 Nb6 11. d5 Ne5 12. Be2 Bxf3 13. gxf3 Qc8 14. h4 c6
15. h5 cxd5 16. hxg6 hxg6 17. Nxd5 Qe6 18. Bxb6 axb6 19. Qxb6 Rxa2 20. Qxb7 Bf6
21. f4 Nc6 22. Qb3 Rxb2 23. Nxf6+ Qxf6 24. Qh3 Rfb8 25. e5 Nxe5 26. Qh7+ Kf8
27. Qh8+ Qxh8 28. Rxh8+ Kg7 29. Rxb8 Nf3+ 30. Bxf3 Rxb8 31. Ke2 Kf6 32. Ke3 Rb6
33. Be4 Rb3+ 34. Rd3 Rb8 35. Rc3 Rh8 36. Rc6+ e6 37. Rc7 Rd8 38. Bc6 Rb8 39.
Rb7 Rd8 40. Ke4 Rc8 41. Bb5 Rd8 42. Bd7 Ra8 43. Kd4 Rd8 44. Kc5 Ra8 45. Kd4 Rd8
46. Ke3 Ra8 47. Bb5 Rd8 48. Be2 Rh8 49. Bf3 Kg7 50. Rd7 Kf6 51. Ke2 Rh4 52. Ke3
Rh8 53. Ra7 Kg7 54. Ra8 Rh3 55. Rd8 Kf6 56. Ke2 Rh4 57. Rd4 Rh8 58. Rb4 Kg7 59.
Kf1 Kf6 60. Kg2 Rc8 61. Rb7 Rd8 62. Be2 Rc8 63. Bb5 Rd8 64. Kf3 Rc8 65. Ke3 Rd8
66. Be2 Rh8 67. Bg4 Rh4 68. Kf3 Rh8 69. Kg3 Rd8 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "14"]
[White "Zuidema, Coen"]
[Black "Ciric, Dragoljub M"]
[Result "0-1"]
[PlyCount "84"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be3 a6 7. Bd3 b5 8. O-O
Bb7 9. a3 g6 10. f4 Bg7 11. Bxb5+ axb5 12. Ndxb5 O-O 13. Nxd6 Bc6 14. e5 Nd5
15. Nxd5 exd5 16. Qd4 Na6 17. Qd3 f6 18. Bd4 Nc7 19. Qc3 fxe5 20. Bxe5 Bxe5 21.
fxe5 Qd7 22. Qg3 Nb5 23. Nxb5 Bxb5 24. Rxf8+ Rxf8 25. h3 Qc6 26. c3 Qb6+ 27.
Kh2 Rf2 28. e6 Bf1 29. e7 Kf7 30. e8=Q+ Kxe8 31. Qe5+ Kf7 32. Qxd5+ Kf8 33. Qd4
Rxg2+ 34. Kh1 Qc6 35. Qh8+ Kf7 36. Qxh7+ Kf6 37. Qh8+ Kg5 38. Qe5+ Kh4 39. Qh8+
Kg3 40. Qe5+ Kxh3 41. Qh8+ Kg4 42. Qd4+ Kf5 0-1

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "15"]
[White "Bilek, Istvan"]
[Black "Donner, Jan-Hein"]
[Result "0-1"]
[PlyCount "64"]

1. Nf3 d5 2. g3 g6 3. Bg2 Bg7 4. O-O e5 5. d3 Ne7 6. Nbd2 O-O 7. Rb1 a5 8. c4
d4 9. b3 Nec6 10. a3 Na6 11. Ne1 Re8 12. Nc2 Bf8 13. f4 exf4 14. Rxf4 Bh6 15.
Rf2 Be3 16. Qf1 Ne5 17. Ne4 f5 18. Nxe3 dxe3 19. Rf4 fxe4 20. Bxe4 Nc5 21. Bd5+
Be6 22. Bxe3 Bxd5 23. Bxc5 Be6 24. Qg2 b6 25. Bd4 Qd6 26. Rbf1 Nd7 27. Bb2 c5
28. Qf2 Bh3 29. Rf7 Ne5 30. Rf6 Qe7 31. Bxe5 Qxe5 32. Rxg6+ hxg6 0-1

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "15"]
[White "Bouwmeester, Hans"]
[Black "Kuijpers, Frans"]
[Result "1/2-1/2"]
[PlyCount "54"]

1. c4 e6 2. Nf3 Nf6 3. g3 d5 4. Bg2 Be7 5. O-O O-O 6. b3 c5 7. Bb2 Nc6 8. e3 b6
9. d3 Bb7 10. Nc3 Rc8 11. Qe2 Rc7 12. Rfd1 Rd7 13. cxd5 Nxd5 14. Nxd5 Rxd5 15.
d4 Rd7 16. dxc5 Bxc5 17. Ne5 Nxe5 18. Bxb7 Nd3 19. Bc3 Rxb7 20. Rxd3 Rd7 21.
Qg4 f5 22. Rxd7 Qxd7 23. Rd1 fxg4 24. Rxd7 Rf7 25. Rd8+ Rf8 26. Rd3 Rf7 27. Kf1
Kf8 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "15"]
[White "Bronstein, David I"]
[Black "Lengyel, Levente"]
[Result "1/2-1/2"]
[PlyCount "39"]

1. d4 Nf6 2. Nf3 e6 3. Bf4 c5 4. c3 cxd4 5. cxd4 Qb6 6. Qc2 Nc6 7. e3 d5 8. Nc3
Bd7 9. Be2 Be7 10. O-O O-O 11. Bg5 Rfc8 12. Nd2 Qd8 13. Rfc1 Be8 14. a3 h6 15.
Bh4 Nd7 16. Bg3 Nb6 17. Nb3 Nc4 18. e4 N4a5 19. Nxa5 Qxa5 20. exd5 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "15"]
[White "Ciric, Dragoljub M"]
[Black "Ivkov, Borislav"]
[Result "1/2-1/2"]
[PlyCount "30"]

1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Nc3 Nc6 5. Nf3 Nf6 6. Bf4 e6 7. e3 Bd6 8.
Bxd6 Qxd6 9. Bb5 Bd7 10. O-O O-O 11. Rc1 Rfc8 12. Bxc6 Bxc6 13. Qb3 Rc7 14. Ne5
Rac8 15. Nxc6 Qxc6 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "15"]
[White "Jongsma, Lex"]
[Black "Zuidema, Coen"]
[Result "1/2-1/2"]
[PlyCount "43"]

1. c4 Nf6 2. Nf3 e6 3. g3 d5 4. Bg2 Be7 5. O-O O-O 6. b3 c5 7. Bb2 Nc6 8. d3 d4
9. Na3 e5 10. Nc2 Ne8 11. e3 a5 12. a3 dxe3 13. fxe3 Bf6 14. Rb1 Bg4 15. h3 Bh5
16. Qe2 Qd6 17. g4 Bg6 18. e4 Nd4 19. Ncxd4 cxd4 20. Qe1 Nc7 21. Bc1 Ne6 22.
Kh1 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "15"]
[White "Kotov, Alexander"]
[Black "Kavalek, Lubomir"]
[Result "1/2-1/2"]
[PlyCount "166"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 c6 6. Be3 a6 7. Bd3 b5 8. Nge2 O-O
9. O-O e5 10. Qe1 b4 11. Na4 exd4 12. Bxd4 c5 13. Be3 Nc6 14. Rd1 Ne5 15. b3
Bd7 16. Nb2 Ne8 17. Qd2 Qe7 18. Bb1 Bc6 19. Nd3 Nxd3 20. Qxd3 a5 21. Bf4 Be5
22. Bg3 Bxg3 23. Nxg3 Rd8 24. f4 Nf6 25. Rde1 h5 26. Qc2 Rde8 27. e5 dxe5 28.
Rxe5 Qd6 29. Rd1 Qc7 30. Rde1 h4 31. Nf1 Ng4 32. Rxe8 Rxe8 33. Rxe8+ Bxe8 34.
h3 Nf6 35. Qf2 Nh5 36. f5 Qe7 37. Ne3 Qe5 38. Ng4 Qa1 39. Qe1 Qd4+ 40. Kh1 Kf8
41. fxg6 fxg6 42. Qf2+ Qxf2 43. Nxf2 Ng3+ 44. Kh2 Ke7 45. Nd3 Kd6 46. Ne1 Ne2
47. Nf3 Nc3 48. Bc2 Nxa2 49. Nxh4 Nc1 50. Nf3 a4 51. bxa4 b3 52. Bb1 Ne2 53.
Nd2 Nc3 54. Bd3 b2 55. a5 g5 56. g3 Kc7 57. g4 Kb7 58. Kg3 Ka6 59. Nb3 Ne2+ 60.
Kf2 Nf4 61. Bb1 Bg6 62. Nxc5+ Kxa5 63. Ne4 Bxe4 64. Bxe4 Kb4 65. h4 Kxc4 66.
Ke3 Nd5+ 67. Kf3 gxh4 68. g5 Kd4 69. g6 Nf6 70. Bb1 Ke5 71. Kg2 Kf4 72. Kh3 Kg5
73. g7 Ng8 74. Bc2 Ne7 75. Bb1 Kh5 76. Bc2 Kh6 77. Kxh4 Kxg7 78. Kg5 Nd5 79.
Bb1 Nc3 80. Bc2 Ne2 81. Bb1 Nc3 82. Bc2 Nb5 83. Bb1 Na3 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "15"]
[White "Marovic, Drazen"]
[Black "Shamkovich, Leonid"]
[Result "1/2-1/2"]
[PlyCount "80"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Na6 6. e4 Bg4 7. Bxc4 e6 8. Be3
Nb4 9. O-O Be7 10. Qe2 O-O 11. Rad1 Qc7 12. h3 Bh5 13. Bg5 c5 14. e5 Nfd5 15.
Bxd5 exd5 16. Bxe7 Qxe7 17. dxc5 Qxc5 18. Qb5 Rfc8 19. Rd4 a5 20. Nxd5 Bxf3 21.
Qxc5 Rxc5 22. Nxb4 axb4 23. gxf3 b3 24. Rfd1 Kf8 25. f4 b5 26. axb5 Rxb5 27.
Rc1 Rb7 28. Rc3 Ke7 29. Kg2 Ra2 30. Rd2 g6 31. Rc6 Ra4 32. Kg3 h5 33. Rf6 Rc4
34. f5 h4+ 35. Kf3 gxf5 36. Rxf5 Rc2 37. Rd6 Rxb2 38. Rdf6 Ke8 39. e6 fxe6 40.
Rxe6+ Re7 1/2-1/2

[Event "Amsterdam IBM "]
[Site "Amsterdam IBM "]
[Date "1968.??.??"]
[Round "15"]
[White "Ree, Hans"]
[Black "Langeweg, Kick"]
[Result "1/2-1/2"]
[PlyCount "65"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. O-O O-O 8. c4
Nf6 9. Nc3 dxc4 10. Bxc4 Bg4 11. Re1 Nbd7 12. h3 Bh5 13. g4 Bg6 14. Ne5 c5 15.
Nxg6 hxg6 16. dxc5 Bxc5 17. Qf3 Rc8 18. Bb3 Bd6 19. Bg5 Qb6 20. Rad1 Ne5 21.
Qg2 Bb8 22. Be3 Qa6 23. g5 Nh5 24. Bd5 Nc6 25. Qe4 Kh7 26. Bc4 Qa5 27. Rd5 Qc7
28. Qg2 Nb4 29. Rc5 Qe7 30. Rxc8 Rxc8 31. Nd5 Nxd5 32. Bxd5 Nf4 33. Qg4 1/2-1/2

