[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "1"]
[White "Borm, Frans"]
[Black "Ree, Hans"]
[Result "0-1"]
[ECO "B84"]
[WhiteElo "2355"]
[BlackElo "2520"]
[PlyCount "120"]
[EventDate "1980.??.??"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 Be7 7. O-O O-O 8. f4
a6 9. Be3 Qc7 10. Kh1 b5 11. e5 Ne8 12. Bd3 Nd7 13. Qf3 Bb7 14. Qh3 g6 15. f5
exf5 16. e6 Nc5 17. Nxf5 gxf5 18. Qxf5 Nf6 19. Bd4 fxe6 20. Qg5+ Kh8 21. Rxf6
Bxf6 22. Bxf6+ Rxf6 23. Qxf6+ Qg7 24. Qxg7+ Kxg7 25. Bf1 d5 26. Kg1 e5 27. Nd1
Rc8 28. Ne3 Rc7 29. Rd1 d4 30. Ng4 Ne6 31. c3 b4 32. cxd4 exd4 33. Ne5 Rc2 34.
Nd3 a5 35. Rc1 Rd2 36. Re1 Bd5 37. b3 Rxa2 38. Re5 Bxb3 39. Nc1 a4 40. Nxa2
Bxa2 41. Rb5 a3 42. Rxb4 Bd5 43. Ra4 a2 44. Bd3 Nc5 45. Ra7+ Kf6 46. Bc2 d3 47.
Bd1 d2 48. Kf2 Bb3 49. Bxb3 Nxb3 50. Ke2 a1=Q 51. Rxa1 Nxa1 52. Kxd2 Nb3+ 53.
Ke3 Nc5 54. Kf4 Ne6+ 55. Kg4 Kg6 56. g3 Ng7 57. Kf4 Kh5 58. h3 Ne6+ 59. Kf5 Ng5
60. h4 Nh3 0-1

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "1"]
[White "Hofland, Leo"]
[Black "Unzicker, Wolfgang"]
[Result "1/2-1/2"]
[ECO "A14"]
[WhiteElo "2300"]
[BlackElo "2510"]
[PlyCount "35"]
[EventDate "1980.??.??"]

1. c4 e6 2. Nf3 Nf6 3. g3 b6 4. Bg2 Bb7 5. O-O Be7 6. b3 O-O 7. Bb2 c5 8. Nc3
d5 9. cxd5 Nxd5 10. Nxd5 Bxd5 11. Rc1 Nd7 12. d4 Nf6 13. Ne5 Bxg2 14. Kxg2 Qd5+
15. Kg1 Qb7 16. dxc5 Bxc5 17. Rc4 Rad8 18. Qc1 1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "1"]
[White "Panno, Oscar"]
[Black "Langeweg, Kick"]
[Result "1/2-1/2"]
[ECO "A33"]
[WhiteElo "2540"]
[BlackElo "2425"]
[PlyCount "80"]
[EventDate "1980.??.??"]

1. Nf3 Nf6 2. c4 c5 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. g3 Bc5 7. Nb3 Bb4 8.
Bg2 d5 9. cxd5 Nxd5 10. Qc2 O-O 11. Bd2 Nxc3 12. Bxc3 Qe7 13. O-O Bd7 14. Bxb4
Qxb4 15. Rfd1 Rfd8 16. Qc5 Qb6 17. Rd6 Be8 18. Rad1 Rxd6 19. Rxd6 Rc8 20. Qxb6
axb6 21. f4 Kf8 22. Kf2 Ke7 23. Rd2 f6 24. Rc2 Rd8 25. a3 Bg6 26. Rc1 Rd6 27.
Ke3 e5 28. Nd2 exf4+ 29. gxf4 Bh5 30. Ne4 Rd8 31. Ng3 Be8 32. h4 g6 33. Be4 f5
34. Bf3 Kf6 35. Nf1 Bf7 36. Nd2 Bd5 37. Bxd5 Rxd5 38. b4 Rd7 39. Nc4 Rd4 40.
Kf3 b5 1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "1"]
[White "Rogoff, Kenneth"]
[Black "Ligterink, Gert"]
[Result "1/2-1/2"]
[ECO "D32"]
[WhiteElo "2520"]
[BlackElo "2455"]
[PlyCount "65"]
[EventDate "1980.??.??"]

1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. e3 d5 5. d4 e6 6. cxd5 exd5 7. Be2 cxd4 8.
Nxd4 Bd6 9. O-O O-O 10. b3 Be5 11. Nxc6 bxc6 12. Bb2 Qd6 13. g3 Bh3 14. Re1
Rfe8 15. Bf3 Rad8 16. Rc1 c5 17. Ba3 Bxc3 18. Rxc3 d4 19. exd4 Qxd4 20. Rxe8+
Rxe8 21. Rc1 Ne4 22. Qe2 Re6 23. Bb2 Qb4 24. a3 Qb7 25. Rd1 h6 26. Qd3 Qe7 27.
Qd8+ Qxd8 28. Rxd8+ Kh7 29. Bxe4+ Rxe4 30. Bc3 Re2 31. Rd1 Rc2 32. Be5 Ra2 33.
Bd6 1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "1"]
[White "Smejkal, Jan"]
[Black "Bohm, Hans"]
[Result "0-1"]
[ECO "A07"]
[WhiteElo "2565"]
[BlackElo "2430"]
[PlyCount "77"]
[EventDate "1980.??.??"]

1. Nf3 Nf6 2. g3 d5 3. Bg2 c6 4. O-O Bf5 5. b3 Nbd7 6. Bb2 e6 7. d3 h6 8. Nbd2
Bh7 9. Qe1 Be7 10. e4 O-O 11. Qe2 a5 12. a4 Qb8 13. Kh1 Bb4 14. Nh4 b5 15. e5
Ne8 16. f4 Be7 17. f5 Bxh4 18. fxe6 fxe6 19. gxh4 Nc7 20. Nf3 c5 21. h5 Qd8 22.
axb5 Nxb5 23. c4 Nc7 24. Bc3 Ra6 25. Rxa5 d4 26. Be1 Rb6 27. Ra3 Rb8 28. Ba5
Qc8 29. Nh4 Rxf1+ 30. Bxf1 Nf8 31. Bg2 Na6 32. Bd2 Nb4 33. Ra7 Nxd3 34. Kg1 Nd7
35. Qg4 N3xe5 36. Qxe6+ Kh8 37. Ng6+ Bxg6 38. hxg6 Qe8 39. Qxe8+ 0-1

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "1"]
[White "Sznapik, Aleksander"]
[Black "Van Wijgerden, Cor"]
[Result "0-1"]
[ECO "B09"]
[WhiteElo "2460"]
[BlackElo "2435"]
[PlyCount "84"]
[EventDate "1980.??.??"]

1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. f4 Nf6 5. Nf3 c5 6. dxc5 Qa5 7. Bd3 Qxc5 8. Qe2
Bg4 9. Be3 Qa5 10. O-O O-O 11. Qf2 Bxf3 12. Qxf3 Nc6 13. Kh1 Nb4 14. Rae1 Nxd3
15. cxd3 e6 16. Bc1 Nd7 17. f5 Rae8 18. Bf4 Qa6 19. Qg3 Nf6 20. Bg5 exf5 21.
exf5 Rxe1 22. Rxe1 Qc6 23. Qh4 Re8 24. Rf1 Nd5 25. Ne4 Re5 26. fxg6 hxg6 27.
Bh6 Bxh6 28. Qxh6 Rh5 29. Qd2 Qe8 30. h3 Qe5 31. Qc1 Kg7 32. Rf3 Ne7 33. Qc7 d5
34. Qxe5+ Rxe5 35. Nd6 f5 36. Nxb7 Re2 37. d4 Rxb2 38. Rb3 Rxb3 39. axb3 Nc6
40. Nd6 Nxd4 41. b4 Kf6 42. Nc8 Nb5 0-1

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "2"]
[White "Bohm, Hans"]
[Black "Rogoff, Kenneth"]
[Result "1-0"]
[ECO "A33"]
[WhiteElo "2430"]
[BlackElo "2520"]
[PlyCount "79"]
[EventDate "1980.??.??"]

1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 e6 5. Nc3 Nc6 6. Ndb5 d5 7. Bf4 e5 8.
cxd5 exf4 9. dxc6 bxc6 10. Qxd8+ Kxd8 11. Rd1+ Bd7 12. Nd6 Rb8 13. Nxf7+ Ke8
14. Nd6+ Bxd6 15. Rxd6 Rxb2 16. Rd2 Rxd2 17. Kxd2 Ng4 18. f3 Ne3 19. g3 g5 20.
h4 h6 21. hxg5 Nxf1+ 22. Rxf1 fxg3 23. Rg1 hxg5 24. Rxg3 g4 25. fxg4 Kf7 26.
Ke3 Rb8 27. Kf4 Rb2 28. Kg5 Be6 29. Rf3+ Kg7 30. Re3 Bxa2 31. Re7+ Bf7 32. Rxa7
Rc2 33. Ne4 Rxe2 34. Nd6 Rf2 35. Nf5+ Kg8 36. Kf6 Bd5 37. g5 Ra2 38. Rd7 Ra8
39. Nh6+ Kf8 40. Rh7 1-0

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "2"]
[White "Borm, Frans"]
[Black "Smejkal, Jan"]
[Result "0-1"]
[ECO "C55"]
[WhiteElo "2355"]
[BlackElo "2565"]
[PlyCount "110"]
[EventDate "1980.??.??"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Be7 5. Nc3 d6 6. Nd5 Nxd5 7. exd5 Nb8 8.
O-O Bg4 9. Re1 O-O 10. d4 exd4 11. Qxd4 Bxf3 12. gxf3 Nd7 13. f4 Bf6 14. Qd1
Nc5 15. c3 Qd7 16. Qf3 Rfe8 17. Bd2 Qf5 18. Rxe8+ Rxe8 19. Re1 Rxe1+ 20. Bxe1
Be5 21. b4 Ne4 22. Bd3 Ng5 23. Qg3 Qxf4 24. Qxf4 Nh3+ 25. Kf1 Nxf4 26. Be4 g6
27. c4 f5 28. Bc2 Kf7 29. Bd2 Kf6 30. a4 g5 31. a5 g4 32. b5 Ng6 33. b6 cxb6
34. axb6 axb6 35. Be3 Bxh2 36. Bxb6 Ne5 37. c5 dxc5 38. Bxc5 Nc4 39. Bd3 Nd6
40. Kg2 Be5 41. Bb6 Nf7 42. Bb5 h5 43. Bd7 h4 44. Kg1 h3 45. Bc5 Nd6 46. Bb6
Kg5 47. Bc5 Ne4 48. Bb6 Bd6 49. Bc8 Bc5 50. Bxc5 Nxc5 51. d6 b5 52. d7 Ne6 53.
Ba6 b4 54. Bc4 Nd8 55. Bb3 f4 0-1

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "2"]
[White "Langeweg, Kick"]
[Black "Sznapik, Aleksander"]
[Result "1-0"]
[ECO "E90"]
[WhiteElo "2425"]
[BlackElo "2460"]
[PlyCount "75"]
[EventDate "1980.??.??"]

1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. d4 O-O 6. Be3 Nc6 7. d5 Nb8 8. Be2
c6 9. O-O Na6 10. Nd4 cxd5 11. exd5 Nc5 12. f3 a5 13. b3 Re8 14. Qd2 Bd7 15.
Rad1 Qb6 16. Ndb5 Bxb5 17. Nxb5 Rec8 18. Rfe1 Qd8 19. Bf1 Qd7 20. Bd4 Nh5 21.
Be3 Re8 22. Re2 Nf6 23. Rde1 Qd8 24. Kh1 Nfd7 25. Bd4 Bxd4 26. Nxd4 Nf6 27. Re3
Qd7 28. Nb5 Kf8 29. Qd4 Rac8 30. Qd2 Ra8 31. Be2 Kg7 32. Bd1 h5 33. Bc2 h4 34.
Qd4 h3 35. g4 Kg8 36. a4 Na6 37. Qf4 Kg7 38. Nd4 1-0

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "2"]
[White "Ligterink, Gert"]
[Black "Panno, Oscar"]
[Result "1/2-1/2"]
[ECO "B82"]
[WhiteElo "2455"]
[BlackElo "2540"]
[PlyCount "50"]
[EventDate "1980.??.??"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. f4 a6 7. Be3 b5 8. Qf3
Bb7 9. Bd3 Nbd7 10. g4 b4 11. Nce2 e5 12. Nb3 d5 13. Ng3 Be7 14. O-O-O Qc7 15.
g5 dxe4 16. Nxe4 Nxe4 17. Bxe4 Bxe4 18. Qxe4 O-O 19. f5 Rfd8 20. Rhg1 Bf8 21.
f6 a5 22. fxg7 Bxg7 23. Nd2 Rac8 24. Nf3 Nc5 25. Bxc5 Qxc5 1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "2"]
[White "Ree, Hans"]
[Black "Unzicker, Wolfgang"]
[Result "1/2-1/2"]
[ECO "E12"]
[WhiteElo "2520"]
[BlackElo "2510"]
[PlyCount "64"]
[EventDate "1980.??.??"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 Bb7 5. a3 d5 6. cxd5 exd5 7. g3 Be7 8. Bg2
O-O 9. O-O Nbd7 10. Bf4 c6 11. b4 Re8 12. Qb3 Nf8 13. Rad1 Ng6 14. Be5 Ng4 15.
h3 N4xe5 16. Nxe5 Nxe5 17. dxe5 Qc7 18. f4 Rad8 19. e3 a6 20. a4 b5 21. axb5
axb5 22. Ne2 Bf8 23. Nd4 Ra8 24. e4 Ra4 25. Nc2 dxe4 26. Bxe4 c5 27. Bxb7 Qxb7
28. bxc5 Bxc5+ 29. Kh2 Rc4 30. Rd2 Rc8 31. Ne3 Bxe3 32. Qxe3 Rc2 1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "2"]
[White "Van Wijgerden, Cor"]
[Black "Hofland, Leo"]
[Result "1/2-1/2"]
[ECO "B13"]
[WhiteElo "2435"]
[BlackElo "2300"]
[PlyCount "24"]
[EventDate "1980.??.??"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nc6 5. c3 Nf6 6. Bf4 Qb6 7. Qb3 Qxb3 8.
axb3 Bg4 9. b4 e6 10. b5 Ne7 11. b6 a6 12. Na3 Nc6 1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "3"]
[White "Hofland, Leo"]
[Black "Langeweg, Kick"]
[Result "1/2-1/2"]
[ECO "A12"]
[WhiteElo "2300"]
[BlackElo "2425"]
[PlyCount "43"]
[EventDate "1980.??.??"]

1. Nf3 Nf6 2. g3 d5 3. Bg2 c6 4. O-O Bf5 5. d3 e6 6. b3 Be7 7. Bb2 h6 8. Nbd2
O-O 9. c4 Nbd7 10. Rc1 Bh7 11. Rc2 a5 12. Ne5 a4 13. Nxd7 Qxd7 14. Qa1 Rfd8 15.
cxd5 exd5 16. Bd4 Ne8 17. bxa4 Rxa4 18. Nb3 Rda8 19. Rb1 Bf5 20. Nc5 Bxc5 21.
Bxc5 Be6 22. Qb2 1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "3"]
[White "Panno, Oscar"]
[Black "Bohm, Hans"]
[Result "1/2-1/2"]
[ECO "A34"]
[WhiteElo "2540"]
[BlackElo "2430"]
[PlyCount "33"]
[EventDate "1980.??.??"]

1. Nf3 Nf6 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. d4 cxd4 6. Qxd4 Nxc3 7. Qxc3 Nc6
8. e4 e6 9. a3 Qf6 10. Qc2 Bd7 11. Bb5 a6 12. Bxc6 Bxc6 13. O-O Qg6 14. Re1 Bd6
15. Nd4 Qh5 16. h3 Rc8 17. Nxc6 1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "3"]
[White "Rogoff, Kenneth"]
[Black "Borm, Frans"]
[Result "1/2-1/2"]
[ECO "A30"]
[WhiteElo "2520"]
[BlackElo "2355"]
[PlyCount "67"]
[EventDate "1980.??.??"]

1. c4 c5 2. Nf3 Nf6 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4
O-O 9. Rd1 d6 10. b3 Nbd7 11. Bb2 a6 12. e4 Qc7 13. Qe3 Rac8 14. Nd4 Rfe8 15.
Qe2 Bf8 16. Re1 Qb8 17. Rad1 Ba8 18. Qd3 Red8 19. Qb1 Nc5 20. Re2 g6 21. Ba1
Bg7 22. a4 Qc7 23. Nc2 Ng4 24. h3 Nf6 25. Na3 Qe7 26. Kh2 Ncd7 27. Red2 Ne8 28.
Ne2 Bxa1 29. Qxa1 Nc5 30. Qb1 a5 31. Nc3 Bc6 32. Nc2 e5 33. Ne3 Nc7 34. Ncd5
1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "3"]
[White "Smejkal, Jan"]
[Black "Ree, Hans"]
[Result "1/2-1/2"]
[ECO "D61"]
[WhiteElo "2565"]
[BlackElo "2520"]
[PlyCount "40"]
[EventDate "1980.??.??"]

1. c4 e6 2. Nf3 d5 3. d4 Nf6 4. Bg5 Be7 5. Nc3 O-O 6. e3 Nbd7 7. Qc2 h6 8. h4
c5 9. O-O-O cxd4 10. Nxd4 Nb6 11. Kb1 Bd7 12. Bxf6 Bxf6 13. cxd5 Nxd5 14. Nxd5
exd5 15. g3 Rc8 16. Qb3 Qa5 17. Bb5 Bc6 18. Bxc6 bxc6 19. Rc1 Bxd4 20. exd4
Rfe8 1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "3"]
[White "Sznapik, Aleksander"]
[Black "Ligterink, Gert"]
[Result "1/2-1/2"]
[ECO "B33"]
[WhiteElo "2460"]
[BlackElo "2455"]
[PlyCount "47"]
[EventDate "1980.??.??"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8.
Na3 Be6 9. Nc4 Rc8 10. Bd3 Be7 11. O-O O-O 12. Ne3 Ng4 13. Bxe7 Nxe3 14. Bxd8
Nxd1 15. Rfxd1 Rfxd8 16. Rd2 Kf8 17. Rad1 Ke7 18. f3 g6 19. Kf2 Rc7 20. a3 Na5
21. Be2 Nc4 22. Bxc4 Rxc4 23. Rd3 Rc6 24. Ke3 1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "3"]
[White "Unzicker, Wolfgang"]
[Black "Van Wijgerden, Cor"]
[Result "1-0"]
[ECO "B09"]
[WhiteElo "2510"]
[BlackElo "2435"]
[PlyCount "75"]
[EventDate "1980.??.??"]

1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. f4 Nf6 5. Nf3 c5 6. dxc5 Qa5 7. Bd3 Qxc5 8. Qe2
Bg4 9. Be3 Qa5 10. O-O O-O 11. h3 Bxf3 12. Qxf3 Nc6 13. a3 Nd7 14. Bd2 Qb6+ 15.
Kh1 Nc5 16. Rab1 Nxd3 17. Qxd3 Rac8 18. Nd5 Qd4 19. Qe2 Qa4 20. Bc3 Bxc3 21.
Nxc3 Qa5 22. Rfd1 a6 23. Nd5 Kg7 24. c3 e6 25. Ne3 Qc7 26. Rd3 Rfd8 27. Rbd1
Na5 28. Qf2 Qe7 29. f5 Nc4 30. Ng4 f6 31. fxe6 h5 32. Ne3 Nxe3 33. Qxe3 Qxe6
34. Qb6 Qxe4 35. Re3 Qa4 36. Re7+ Kg8 37. Qxb7 Qxd1+ 38. Kh2 1-0

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "4"]
[White "Bohm, Hans"]
[Black "Sznapik, Aleksander"]
[Result "1-0"]
[ECO "E61"]
[WhiteElo "2430"]
[BlackElo "2460"]
[PlyCount "68"]
[EventDate "1980.??.??"]

1. c4 g6 2. Nc3 Bg7 3. g3 d6 4. Bg2 e5 5. e3 Nf6 6. Nge2 O-O 7. d4 Nc6 8. b3
exd4 9. exd4 Bf5 10. O-O Re8 11. a3 Qd7 12. Be3 Bh3 13. d5 Bxg2 14. Kxg2 Ne7
15. Qd3 Nf5 16. Bf4 Re7 17. Rae1 Rae8 18. Bd2 Ng4 19. Ng1 Ne5 20. Qe4 h6 21. h3
g5 22. a4 Kh8 23. Qb1 Nd4 24. Nb5 Nf5 25. Nxc7 Nxg3 26. fxg3 Qxc7 27. Bc3 Qd7
28. Qc2 Kg8 29. Re2 g4 30. Bxe5 Rxe5 31. h4 Rxe2+ 32. Nxe2 Re3 33. Rf4 Qe7 34.
Kf2 Rc3 1-0

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "4"]
[White "Borm, Frans"]
[Black "Panno, Oscar"]
[Result "1-0"]
[ECO "B85"]
[WhiteElo "2355"]
[BlackElo "2540"]
[PlyCount "63"]
[EventDate "1980.??.??"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Be2 Nf6 6. Nc3 d6 7. O-O Nc6 8. Be3
Be7 9. f4 O-O 10. Qe1 Bd7 11. Qg3 b5 12. a3 Qc7 13. Kh1 Rab8 14. e5 Ne8 15. Bd3
b4 16. Ne4 bxa3 17. bxa3 g6 18. Nf3 f5 19. exd6 Nxd6 20. Nc5 Bc8 21. Ng5 Bxg5
22. Qxg5 a5 23. Qg3 Re8 24. Rfe1 Ne7 25. Bd4 Nd5 26. c4 Nb6 27. Rac1 Qc6 28.
Qh4 Rf8 29. Nxe6 Bb7 30. Bf1 Ne4 31. Nxf8 Rxf8 32. Qe7 1-0

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "4"]
[White "Langeweg, Kick"]
[Black "Unzicker, Wolfgang"]
[Result "1/2-1/2"]
[ECO "E18"]
[WhiteElo "2425"]
[BlackElo "2510"]
[PlyCount "33"]
[EventDate "1980.??.??"]

1. Nf3 Nf6 2. c4 b6 3. g3 Bb7 4. d4 e6 5. Bg2 Be7 6. O-O O-O 7. Nc3 Ne4 8. Nxe4
Bxe4 9. Nh4 Bxg2 10. Nxg2 d5 11. Qa4 dxc4 12. Qxc4 c5 13. Be3 cxd4 14. Bxd4 Qc8
15. Rac1 Nd7 16. Nf4 Nf6 17. Nd3 1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "4"]
[White "Ligterink, Gert"]
[Black "Hofland, Leo"]
[Result "1-0"]
[ECO "E94"]
[WhiteElo "2455"]
[BlackElo "2300"]
[PlyCount "80"]
[EventDate "1980.??.??"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 Nbd7 7. Qd2 c6 8. Nf3
e5 9. O-O exd4 10. Nxd4 Qe7 11. Rad1 Nc5 12. Rfe1 Re8 13. Bf3 Ne6 14. Nxe6 Bxe6
15. c5 Qf8 16. cxd6 Nd7 17. Be7 Rxe7 18. dxe7 Qxe7 19. Nd5 Qh4 20. Qf4 Qxf4 21.
Nxf4 Nf8 22. Nxe6 Nxe6 23. e5 h5 24. g3 a5 25. Bg2 Ra6 26. f4 Rb6 27. b3 Bf8
28. Bh3 Nd4 29. Kg2 Bb4 30. e6 fxe6 31. Bxe6+ Kg7 32. Re4 c5 33. Bc4 Kf6 34. a4
Bc3 35. Rd3 Bb2 36. Rde3 Bc1 37. Re7 g5 38. Rf7+ Kg6 39. Ree7 Nf5 40. Bd3 Rf6
1-0

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "4"]
[White "Ree, Hans"]
[Black "Van Wijgerden, Cor"]
[Result "1/2-1/2"]
[ECO "E08"]
[WhiteElo "2520"]
[BlackElo "2435"]
[PlyCount "32"]
[EventDate "1980.??.??"]

1. c4 e6 2. Nf3 d5 3. d4 Nf6 4. g3 Be7 5. Bg2 O-O 6. O-O c6 7. Qc2 Nbd7 8. b3
b5 9. c5 Ne4 10. Nbd2 f5 11. Bb2 Bf6 12. b4 a5 13. a3 a4 14. Ne1 Nxd2 15. Qxd2
e5 16. f4 e4 1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "4"]
[White "Smejkal, Jan"]
[Black "Rogoff, Kenneth"]
[Result "0-1"]
[ECO "A21"]
[WhiteElo "2565"]
[BlackElo "2520"]
[PlyCount "78"]
[EventDate "1980.??.??"]

1. c4 e5 2. Nc3 d6 3. d4 exd4 4. Qxd4 Nc6 5. Qd2 Nf6 6. g3 Be6 7. Nd5 Ne5 8. b3
Ne4 9. Qe3 Nc5 10. Bb2 c6 11. Nf4 Be7 12. Nxe6 Nxe6 13. Bh3 Bf6 14. Bxe6 fxe6
15. Nh3 O-O 16. O-O Qb6 17. Qe4 d5 18. Qc2 Rae8 19. Rad1 Ng4 20. Bxf6 Nxf6 21.
Ng5 h6 22. Nf3 Ne4 23. Qb2 Rf6 24. Kg2 Ref8 25. Qd4 Qxd4 26. Rxd4 g5 27. h3 Kg7
28. g4 Rf4 29. cxd5 exd5 30. b4 Nc3 31. Rd2 Rxb4 32. Nd4 Kg6 33. Nf5 Re8 34. e3
a5 35. Rc1 Ne4 36. Rd4 Rb2 37. Ra4 Rxf2+ 38. Kg1 Rb2 39. Rxa5 Nf2 0-1

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "5"]
[White "Hofland, Leo"]
[Black "Bohm, Hans"]
[Result "0-1"]
[ECO "D14"]
[WhiteElo "2300"]
[BlackElo "2430"]
[PlyCount "135"]
[EventDate "1980.??.??"]

1. c4 c6 2. d4 d5 3. cxd5 cxd5 4. Nc3 Nf6 5. Nf3 Nc6 6. Bf4 Bf5 7. e3 e6 8. Bb5
Nd7 9. Qa4 Qb6 10. Nh4 Be4 11. O-O-O Rc8 12. f3 Bg6 13. Nxg6 hxg6 14. Kb1 a6
15. Bxc6 Rxc6 16. Qb3 Qxb3 17. axb3 Bb4 18. Rc1 O-O 19. Na2 Be7 20. Rc3 Rfc8
21. Rhc1 f6 22. Bg3 Kf7 23. e4 f5 24. exd5 exd5 25. Kc2 Nf8 26. Kd3 Ne6 27. Be5
Ke8 28. Rxc6 bxc6 29. Nc3 Kd7 30. Na4 Bd8 31. Nc5+ Nxc5+ 32. Rxc5 Bc7 33. Bxg7
Rb8 34. Kc2 Bxh2 35. Ra5 Ra8 36. Ra1 Bd6 37. Rh1 Re8 38. Kd3 Bf4 39. Be5 Bxe5
40. dxe5 Rxe5 41. Ra1 f4 42. Rxa6 Re3+ 43. Kd2 Rxb3 44. Ra7+ Kd6 45. Kc1 Re3
46. Rf7 g5 47. Rg7 Re5 48. Rg6+ Kc5 49. Kd2 Kb5 50. Kd3 c5 51. Rg8 Ka4 52. Rc8
Re3+ 53. Kd2 Kb4 54. Rg8 Re5 55. Kd3 Re3+ 56. Kd2 Kb3 57. Rxg5 Kxb2 58. Rxd5 c4
59. Kd1 Ra3 60. Rd2+ Kc3 61. Rc2+ Kb3 62. Kd2 Ra1 63. Rc3+ Kb4 64. Rc2 Rb1 65.
Ra2 Kb3 66. Ra8 Rb2+ 67. Ke1 Rxg2 68. Rb8+ 0-1

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "5"]
[White "Panno, Oscar"]
[Black "Smejkal, Jan"]
[Result "1-0"]
[ECO "A30"]
[WhiteElo "2540"]
[BlackElo "2565"]
[PlyCount "59"]
[EventDate "1980.??.??"]

1. c4 c5 2. Nf3 Nf6 3. b3 g6 4. Bb2 Bg7 5. g3 b6 6. Bg2 Bb7 7. O-O O-O 8. Nc3
e6 9. d4 Qe7 10. Qd2 d5 11. cxd5 exd5 12. Rfd1 Na6 13. Rac1 Rfe8 14. e3 Ne4 15.
Qe1 Rad8 16. dxc5 bxc5 17. a3 Nc7 18. Na4 Bxb2 19. Nxb2 Nb5 20. Qa5 a6 21. a4
Qf6 22. axb5 Qxb2 23. Nd2 Nxd2 24. Qxd2 Qxb3 25. bxa6 Bxa6 26. Bxd5 c4 27. Qa5
Qb2 28. Rb1 Qf6 29. Rb6 Rxd5 30. Rxd5 1-0

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "5"]
[White "Rogoff, Kenneth"]
[Black "Ree, Hans"]
[Result "0-1"]
[ECO "A39"]
[WhiteElo "2520"]
[BlackElo "2520"]
[PlyCount "71"]
[EventDate "1980.??.??"]

1. c4 g6 2. d4 Nf6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 c5 6. O-O cxd4 7. Nxd4 Nc6 8.
Nc3 Nxd4 9. Qxd4 d6 10. Qd3 a6 11. Bd2 Rb8 12. a4 a5 13. b3 Nd7 14. Rad1 Nc5
15. Qc2 Bd7 16. Nd5 Re8 17. Rfe1 b6 18. h4 Bf5 19. e4 Bg4 20. f3 Bd7 21. Be3 f5
22. h5 fxe4 23. hxg6 hxg6 24. fxe4 Bg4 25. Rd2 Nd7 26. Rf1 Ne5 27. Rdf2 Be6 28.
Qe2 Qd7 29. Nf4 Bg4 30. Qd2 Kh7 31. Bh3 g5 32. Rh2 Kg8 33. Qg2 Rf8 34. Kf2 Bxh3
35. Qxh3 Qxh3 36. Rxh3 0-1

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "5"]
[White "Sznapik, Aleksander"]
[Black "Borm, Frans"]
[Result "1-0"]
[ECO "C95"]
[WhiteElo "2460"]
[BlackElo "2355"]
[PlyCount "85"]
[EventDate "1980.??.??"]

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. Nbd2 Bb7 12. Bc2 Re8 13. a4 Bf8 14. b4 Nb6 15. a5
Nbd7 16. Bb2 g6 17. Qb1 Nh5 18. Qa2 c5 19. Rad1 Qc7 20. bxc5 dxc5 21. Nxe5 Nxe5
22. dxe5 Qxe5 23. c4 Qc7 24. Nf1 Rad8 25. Rxd8 Qxd8 26. cxb5 axb5 27. a6 Ba8
28. Ne3 c4 29. Ba1 Qb6 30. Rd1 Rd8 31. Rxd8 Qxd8 32. Bd1 Nf4 33. Bf3 Ne6 34.
Nd5 Bg7 35. Bxg7 Nxg7 36. a7 Ne6 37. Qa1 Ng5 38. Qe5 Nxf3+ 39. gxf3 f5 40. Qb8
Qf8 41. Qxb5 fxe4 42. fxe4 Kg7 43. Qxc4 1-0

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "5"]
[White "Unzicker, Wolfgang"]
[Black "Ligterink, Gert"]
[Result "1-0"]
[ECO "B64"]
[WhiteElo "2510"]
[BlackElo "2455"]
[PlyCount "49"]
[EventDate "1980.??.??"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Be7 8.
O-O-O O-O 9. f4 h6 10. Bh4 Bd7 11. Nf3 Qa5 12. Qe1 Rfc8 13. e5 dxe5 14. fxe5
Nb4 15. exf6 Rxc3 16. bxc3 Nxa2+ 17. Kd2 Bc5 18. Bd3 Nxc3 19. Ra1 Qb4 20. Qe5
Bc6 21. Be1 Bxf3 22. gxf3 Rd8 23. Kc1 Bd4 24. Qa5 Be3+ 25. Bd2 1-0

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "5"]
[White "Van Wijgerden, Cor"]
[Black "Langeweg, Kick"]
[Result "1/2-1/2"]
[ECO "B22"]
[WhiteElo "2435"]
[BlackElo "2425"]
[PlyCount "67"]
[EventDate "1980.??.??"]

1. e4 c5 2. d4 cxd4 3. c3 Nf6 4. e5 Nd5 5. Nf3 d6 6. cxd4 Nc6 7. Bc4 Nb6 8. Bb5
dxe5 9. Nxe5 Bd7 10. Bxc6 Bxc6 11. Nxc6 bxc6 12. O-O g6 13. Re1 Bg7 14. Bg5 Nc8
15. Qa4 O-O 16. Qxc6 Rb8 17. Qc2 Qb6 18. Bc1 Nd6 19. Nc3 Nf5 20. d5 Rfc8 21.
Qd3 Qd4 22. Qe2 Qb4 23. Bd2 Qxb2 24. Rab1 Qa3 25. Rxb8 Rxb8 26. Qe4 Nd6 27. Qa4
Qc5 28. Ne4 Qxd5 29. Bf4 Qd4 30. Qa5 Rc8 31. Nxd6 exd6 32. Be3 Qc3 33. Qxc3
Rxc3 34. Bxa7 1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "6"]
[White "Bohm, Hans"]
[Black "Unzicker, Wolfgang"]
[Result "0-1"]
[ECO "E67"]
[WhiteElo "2430"]
[BlackElo "2510"]
[PlyCount "86"]
[EventDate "1980.??.??"]

1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. d4 Nbd7 7. Nc3 e5 8. dxe5
dxe5 9. b3 Re8 10. Qc2 c6 11. Rd1 Qe7 12. a4 Nc5 13. e4 a5 14. Ba3 Bg4 15. h3
Bxf3 16. Bxf3 Bf8 17. Rab1 Qc7 18. Bc1 Ne6 19. Be3 Bc5 20. Bxc5 Nxc5 21. h4
Red8 22. Rxd8+ Rxd8 23. Rd1 Rxd1+ 24. Bxd1 Qd6 25. Bf3 Qd4 26. Kf1 Nd3 27. Qd2
Nd7 28. Nd1 N7c5 29. Qxa5 Nxb3 30. Qc3 Ndc5 31. Qxd4 Nxd4 32. Bg2 Nxa4 33. Ke1
Kf8 34. Kd2 Ke7 35. f4 Nb6 36. Ne3 exf4 37. gxf4 Ne6 38. f5 Nf4 39. Bf1 Nd7 40.
Ng4 Nh5 41. Ke3 Nhf6 42. Nxf6 Kxf6 43. Bh3 g5 0-1

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "6"]
[White "Borm, Frans"]
[Black "Hofland, Leo"]
[Result "1/2-1/2"]
[ECO "B46"]
[WhiteElo "2355"]
[BlackElo "2300"]
[PlyCount "44"]
[EventDate "1980.??.??"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e6 5. Nc3 a6 6. Be2 Nge7 7. Be3 Nxd4 8.
Qxd4 b5 9. O-O Nc6 10. Qd2 Be7 11. a4 b4 12. Nd5 exd5 13. exd5 Na5 14. d6 Bf6
15. Bf3 Nc6 16. a5 O-O 17. Bb6 Bg5 18. Qd1 Qf6 19. Bxc6 dxc6 20. d7 Bxd7 21.
Qxd7 Qxb2 22. Qxc6 Rac8 1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "6"]
[White "Ligterink, Gert"]
[Black "Van Wijgerden, Cor"]
[Result "1-0"]
[ECO "A65"]
[WhiteElo "2455"]
[BlackElo "2435"]
[PlyCount "63"]
[EventDate "1980.??.??"]

1. d4 Nf6 2. c4 e6 3. Nc3 c5 4. d5 exd5 5. cxd5 d6 6. e4 g6 7. Bd3 Bg7 8. Nge2
O-O 9. O-O b6 10. Bg5 Ba6 11. f4 Bxd3 12. Qxd3 Nbd7 13. Kh1 a6 14. a4 Qc7 15.
Rad1 Rfe8 16. Ng3 c4 17. Qf3 b5 18. axb5 axb5 19. Nxb5 Qb6 20. Nxd6 Qxd6 21. e5
Qb6 22. exf6 Nxf6 23. d6 Nd7 24. f5 Qb5 25. fxg6 fxg6 26. Be7 Ne5 27. Qe2 Nc6
28. Qe6+ Kh8 29. d7 Rg8 30. Ne4 Nd8 31. Nd6 Nxe6 32. Nf7# 1-0

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "6"]
[White "Ree, Hans"]
[Black "Langeweg, Kick"]
[Result "1/2-1/2"]
[ECO "B22"]
[WhiteElo "2520"]
[BlackElo "2425"]
[PlyCount "112"]
[EventDate "1980.??.??"]

1. e4 c5 2. Nf3 e6 3. c3 d5 4. exd5 Qxd5 5. d4 Nf6 6. Na3 Be7 7. Nb5 Na6 8. c4
Qd8 9. Be2 O-O 10. O-O cxd4 11. Bf4 Ne8 12. Qxd4 Qxd4 13. Nfxd4 f6 14. Nb3 Nb4
15. a3 Nc6 16. Bf3 g5 17. Be3 a6 18. Bxc6 bxc6 19. Na7 c5 20. Nc6 Bd6 21. Nxc5
Rf7 22. b4 Ng7 23. f3 e5 24. Rfd1 Bc7 25. a4 g4 26. a5 gxf3 27. gxf3 Bh3 28.
Kh1 Nf5 29. Bf2 Nd6 30. Rg1+ Kh8 31. Rac1 Bf5 32. Be3 h5 33. Bf2 Kh7 34. Bg3
Bh3 35. Rgd1 Rg7 36. Rg1 Rf7 37. Bh4 Nf5 38. Bf2 Nd6 39. Rg3 Bf5 40. Be3 Kh8
41. Rg2 Bh3 42. Rg6 Nf5 43. Bd2 Nd6 44. Rh6+ Rh7 45. Rxh7+ Kxh7 46. Ne7 Bd8 47.
Nd5 Ra7 48. Ne4 Nxe4 49. fxe4 f5 50. Rc3 Bg4 51. h3 Be2 52. exf5 Rg7 53. Be1 e4
54. f6 Rg8 55. Nf4 Bf3+ 56. Rxf3 exf3 1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "6"]
[White "Rogoff, Kenneth"]
[Black "Panno, Oscar"]
[Result "1/2-1/2"]
[ECO "A29"]
[WhiteElo "2520"]
[BlackElo "2540"]
[PlyCount "51"]
[EventDate "1980.??.??"]

1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Nb6 7. O-O Be7 8.
a3 a5 9. d3 O-O 10. Be3 Be6 11. Na4 Nd5 12. Bc5 Bd6 13. Rc1 h6 14. d4 e4 15.
Ne5 f5 16. Nxc6 bxc6 17. e3 Qd7 18. Qc2 Rab8 19. Ba7 Rb7 20. Nc5 Bxc5 21. Bxc5
Rfb8 22. Rb1 a4 23. Rfc1 Rb3 24. Bf1 Nf6 25. Bb4 Bd5 26. Bc4 1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "6"]
[White "Smejkal, Jan"]
[Black "Sznapik, Aleksander"]
[Result "1/2-1/2"]
[ECO "E63"]
[WhiteElo "2565"]
[BlackElo "2460"]
[PlyCount "147"]
[EventDate "1980.??.??"]

1. Nf3 Nf6 2. c4 g6 3. d4 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nc6 7. Nc3 a6 8. h3
Rb8 9. e4 Nd7 10. Bg5 Na5 11. b3 c5 12. Qd2 Nc6 13. d5 Nd4 14. Nxd4 Bxd4 15.
Rac1 b5 16. cxb5 axb5 17. b4 Ne5 18. Ne2 Bxh3 19. Nxd4 cxd4 20. Qxd4 Bxg2 21.
Kxg2 f6 22. Bh6 Re8 23. Bf4 Ra8 24. Bxe5 fxe5 25. Qd2 Rf8 26. Rc6 Ra3 27. Qe2
Qa8 28. Rc7 Qe8 29. Rfc1 Qf7 30. R1c3 Rfa8 31. Rc2 h5 32. R7c3 Kg7 33. Qxb5 h4
34. Qe2 hxg3 35. fxg3 Qf6 36. Qf3 Rxa2 37. Qxf6+ Kxf6 38. b5 Rxc2+ 39. Rxc2 Rb8
40. Rb2 Rb6 41. Kf3 e6 42. dxe6 Kxe6 43. Ke3 Kd7 44. Kf3 Ke6 45. Rb3 Ke7 46.
Ke3 Kd7 47. Kf3 Ke6 48. Ke2 Kd7 49. Ke3 Rb8 50. Kf3 Rb6 51. Kg4 Ke6 52. Kf3 Kd7
53. Rb1 Ke6 54. Ke2 Kd7 55. Rb3 Rb8 56. Kd3 g5 57. Kc4 Rc8+ 58. Kb4 Rc1 59. Rc3
Rb1+ 60. Ka5 Ra1+ 61. Kb6 Ra4 62. Re3 d5 63. exd5 Kd6 64. Rb3 Ra8 65. Kb7 Re8
66. b6 e4 67. Ka7 e3 68. b7 e2 69. Rb1 Kxd5 70. b8=Q Rxb8 71. Kxb8 Ke4 72. Kc7
Kf3 73. Kd6 Kxg3 74. Ke5 1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "7"]
[White "Hofland, Leo"]
[Black "Smejkal, Jan"]
[Result "1/2-1/2"]
[ECO "A21"]
[WhiteElo "2300"]
[BlackElo "2565"]
[PlyCount "100"]
[EventDate "1980.??.??"]

1. c4 e5 2. Nc3 d6 3. d4 exd4 4. Qxd4 Nc6 5. Qd2 Nf6 6. b3 Be6 7. e4 a5 8. Bd3
g6 9. Bb2 Bg7 10. Nge2 O-O 11. O-O Nd7 12. Nd5 Bxb2 13. Qxb2 Nce5 14. Qd2 Nc5
15. Bc2 Re8 16. Rfe1 Bxd5 17. exd5 Qf6 18. h3 Re7 19. Qc3 Rae8 20. Kf1 Qh4 21.
Qg3 Qxg3 22. Nxg3 f5 23. Rad1 Kf8 24. f4 Ned7 25. Rxe7 Rxe7 26. Re1 Na6 27.
Rxe7 Kxe7 28. Ne2 a4 29. g4 Nb4 30. Bb1 fxg4 31. hxg4 a3 32. Nd4 Nc5 33. Nb5
Ncd3 34. Nxc7 Nxf4 35. Nb5 Nfd3 36. Nxa3 Ne5 37. Nc2 Nxc2 38. Bxc2 Nxg4 39. Ke2
Ne5 40. Ke3 h5 41. Bd1 h4 42. Be2 g5 43. b4 b6 44. a4 g4 45. Kf2 Kd8 46. Kg2 g3
47. Bf1 Ng4 48. Kf3 Ne5+ 49. Kg2 Ng4 50. Kf3 Ne5+ 1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "7"]
[White "Langeweg, Kick"]
[Black "Ligterink, Gert"]
[Result "1-0"]
[ECO "B38"]
[WhiteElo "2425"]
[BlackElo "2455"]
[PlyCount "81"]
[EventDate "1980.??.??"]

1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. d4 O-O 6. Be3 c5 7. h3 cxd4 8. Nxd4
Nc6 9. Be2 Bd7 10. Nf3 Rc8 11. Rc1 a6 12. O-O Na5 13. e5 dxe5 14. Nxe5 Nc6 15.
Nxd7 Nxd7 16. Qd2 e5 17. Bf3 Rb8 18. Bxc6 bxc6 19. Qd6 Qc8 20. b3 Rd8 21. Qe7
Bf6 22. Qa3 Bg7 23. Rfd1 Bf8 24. c5 f5 25. f3 Qc7 26. Qxa6 Nxc5 27. Qc4+ Qf7
28. Qe2 Ne6 29. Na4 Rxd1+ 30. Qxd1 Rd8 31. Qe2 Nd4 32. Qc4 c5 33. Nxc5 Rc8 34.
Bxd4 exd4 35. Qxf7+ Kxf7 36. Nd3 Rc3 37. Rxc3 dxc3 38. Ne1 Ke6 39. Kf2 Ke5 40.
Ke3 Bh6+ 41. Kd3 1-0

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "7"]
[White "Panno, Oscar"]
[Black "Ree, Hans"]
[Result "1/2-1/2"]
[ECO "A36"]
[WhiteElo "2540"]
[BlackElo "2520"]
[PlyCount "26"]
[EventDate "1980.??.??"]

1. c4 g6 2. Nf3 Bg7 3. Nc3 c5 4. g3 Nc6 5. Bg2 e6 6. O-O Nge7 7. e3 O-O 8. d4
cxd4 9. Nxd4 Nxd4 10. exd4 d5 11. cxd5 Nxd5 12. Nxd5 exd5 13. Be3 Be6 1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "7"]
[White "Sznapik, Aleksander"]
[Black "Rogoff, Kenneth"]
[Result "1/2-1/2"]
[ECO "C42"]
[WhiteElo "2460"]
[BlackElo "2520"]
[PlyCount "32"]
[EventDate "1980.??.??"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. O-O Nc6 8. c3
Bf5 9. Re1 O-O 10. Qc2 Bd6 11. Nbd2 Nxd2 12. Bxd2 Bxd3 13. Qxd3 Qd7 14. Ng5 g6
15. Nf3 a6 16. Bg5 Rfe8 1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "7"]
[White "Unzicker, Wolfgang"]
[Black "Borm, Frans"]
[Result "1-0"]
[ECO "C95"]
[WhiteElo "2510"]
[BlackElo "2355"]
[PlyCount "81"]
[EventDate "1980.??.??"]

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. Nbd2 Bb7 12. Bc2 Re8 13. a4 Bf8 14. b3 d5 15.
dxe5 Nxe4 16. Nxe4 dxe4 17. Bxe4 Bxe4 18. Rxe4 Nxe5 19. Bf4 Qxd1+ 20. Rxd1
Nxf3+ 21. gxf3 c5 22. Rxe8 Rxe8 23. Kf1 h6 24. Rd7 g5 25. Bd6 c4 26. Bxf8 Kxf8
27. axb5 cxb3 28. bxa6 Ra8 29. Rb7 Rxa6 30. Rxb3 Re6 31. Rb4 Ke7 32. Re4 Kd6
33. Rxe6+ Kxe6 34. Ke2 Kd5 35. Kd3 h5 36. f4 gxf4 37. h4 f3 38. c4+ Kc5 39. Kc3
Kc6 40. Kd4 Kd6 41. c5+ 1-0

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "7"]
[White "Van Wijgerden, Cor"]
[Black "Bohm, Hans"]
[Result "1/2-1/2"]
[ECO "D13"]
[WhiteElo "2435"]
[BlackElo "2430"]
[PlyCount "38"]
[EventDate "1980.??.??"]

1. c4 c6 2. d4 d5 3. cxd5 cxd5 4. Nc3 Nf6 5. Nf3 Nc6 6. Bf4 e6 7. e3 Bd6 8. Bg3
O-O 9. Bd3 Re8 10. Ne5 Bxe5 11. dxe5 Nd7 12. f4 Nc5 13. Bb1 b6 14. Nb5 Ba6 15.
Nd6 Nb4 16. Bxh7+ Kxh7 17. Qh5+ Kg8 18. Qxf7+ Kh7 19. Qh5+ Kg8 1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "8"]
[White "Bohm, Hans"]
[Black "Langeweg, Kick"]
[Result "1/2-1/2"]
[ECO "B20"]
[WhiteElo "2430"]
[BlackElo "2425"]
[PlyCount "113"]
[EventDate "1980.??.??"]

1. f4 g6 2. g3 Bg7 3. Bg2 c5 4. e4 Nc6 5. d3 d6 6. Nf3 e5 7. c3 Nge7 8. O-O O-O
9. Be3 exf4 10. Bxf4 d5 11. Nbd2 h6 12. Qc2 Be6 13. Be3 b6 14. Rad1 Qd7 15. d4
cxd4 16. Nxd4 Nxd4 17. Bxd4 Bxd4+ 18. cxd4 Rac8 19. Qd3 Qa4 20. exd5 Nxd5 21.
Be4 Kg7 22. a3 Rfd8 23. Nf3 Qc4 24. Qxc4 Rxc4 25. Ne5 Rc7 26. Rc1 Rdc8 27. Rxc7
Rxc7 28. Kf2 g5 29. Rd1 Nf6 30. Bb1 Bb3 31. Re1 Kf8 32. Ke3 Be6 33. Kd2 Nd5 34.
Be4 f6 35. Nd3 Rc4 36. Bxd5 Bxd5 37. Ke3 a5 38. Re2 Rc7 39. Rf2 Ke7 40. Kd2 Bb3
41. Ne1 Rc6 42. Rf3 Bd5 43. Rc3 Be4 44. Rxc6 Bxc6 45. Nc2 h5 46. Ne3 Kd6 47.
Nc4+ Kc7 48. Ke3 Bd5 49. Nd2 Kd6 50. Nb1 Ke6 51. Nc3 Bc6 52. b4 axb4 53. axb4
Kd6 54. Kd3 Bg2 55. Na4 Kc6 56. Nc3 Kd6 57. Ke3 1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "8"]
[White "Borm, Frans"]
[Black "Van Wijgerden, Cor"]
[Result "1-0"]
[ECO "B08"]
[WhiteElo "2355"]
[BlackElo "2435"]
[PlyCount "79"]
[EventDate "1980.??.??"]

1. e4 g6 2. d4 Bg7 3. Nf3 c6 4. h3 d6 5. a4 Nf6 6. Nc3 O-O 7. Be3 Qa5 8. Nd2
Nbd7 9. Be2 Qc7 10. O-O b6 11. f4 Bb7 12. e5 Nd5 13. Nxd5 cxd5 14. c3 e6 15.
Bd3 Nb8 16. Qe2 Nc6 17. Nf3 Rae8 18. Rae1 Bc8 19. Bc1 Bd7 20. exd6 Qxd6 21. Ne5
Rc8 22. Nxd7 Qxd7 23. g4 Rfe8 24. Qg2 Re7 25. f5 exf5 26. Rxe7 Nxe7 27. gxf5
Qd6 28. Bf4 Qc6 29. Bb5 Qb7 30. Qe2 Ra8 31. fxg6 hxg6 32. h4 Nf5 33. h5 Qe7 34.
hxg6 fxg6 35. Qxe7 Nxe7 36. Bg5 Bf8 37. Bd7 Nf5 38. Bxf5 gxf5 39. Rxf5 Re8 40.
Kf2 1-0

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "8"]
[White "Panno, Oscar"]
[Black "Sznapik, Aleksander"]
[Result "1-0"]
[ECO "B08"]
[WhiteElo "2540"]
[BlackElo "2460"]
[PlyCount "81"]
[EventDate "1980.??.??"]

1. Nf3 g6 2. e4 Bg7 3. d4 d6 4. Be2 Nf6 5. Nc3 O-O 6. O-O c6 7. a4 Nbd7 8. b3
c5 9. Bb2 cxd4 10. Nxd4 a6 11. a5 e6 12. Qd2 b5 13. axb6 Qxb6 14. Rfe1 Bb7 15.
Bf3 Ne5 16. Bd1 Rfd8 17. Kh1 Rac8 18. f3 h5 19. Na4 Qa7 20. c4 h4 21. Be2 h3
22. gxh3 Nxe4 23. fxe4 Bxe4+ 24. Kg1 Nc6 25. Rad1 e5 26. Bg4 Bf5 27. Bxf5 gxf5
28. Qg5 exd4 29. Rd3 Re8 30. Rf1 Re6 31. Rg3 Rg6 32. Qxf5 Rxg3+ 33. hxg3 Re8
34. Kg2 Re5 35. Qc8+ Kh7 36. Qxc6 Re2+ 37. Rf2 Rxf2+ 38. Kxf2 d3+ 39. Kf3 Bxb2
40. Nxb2 Qd4 41. Qe4+ 1-0

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "8"]
[White "Ree, Hans"]
[Black "Ligterink, Gert"]
[Result "1/2-1/2"]
[ECO "A81"]
[WhiteElo "2520"]
[BlackElo "2455"]
[PlyCount "63"]
[EventDate "1980.??.??"]

1. d4 f5 2. g3 Nf6 3. Bg2 g6 4. Nf3 Bg7 5. O-O O-O 6. b3 d6 7. Bb2 c6 8. Nbd2
a5 9. a3 Na6 10. Re1 Ne4 11. c4 Qb6 12. e3 Nxd2 13. Nxd2 Be6 14. Nf3 Rae8 15.
Rb1 Bc8 16. d5 Bxb2 17. Rxb2 Qc5 18. Ra2 e5 19. dxe6 Bxe6 20. Bf1 Rd8 21. Qd4
Bc8 22. Rd1 Qxd4 23. Nxd4 Kg7 24. Rad2 Kf6 25. Nc2 Ke7 26. b4 axb4 27. axb4 Be6
28. Ra1 Ra8 29. Rdd1 Nc7 30. Nd4 Rxa1 31. Rxa1 Ra8 32. Rxa8 1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "8"]
[White "Rogoff, Kenneth"]
[Black "Hofland, Leo"]
[Result "1/2-1/2"]
[ECO "B07"]
[WhiteElo "2520"]
[BlackElo "2300"]
[PlyCount "43"]
[EventDate "1980.??.??"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Bg5 h6 5. Be3 Ng4 6. Bc1 Bg7 7. f3 Nf6 8. Be3
c6 9. Qd2 Nbd7 10. Bd3 a6 11. a4 b6 12. Nge2 Bb7 13. O-O Qc7 14. Nd1 e5 15. c4
d5 16. cxd5 cxd5 17. Rc1 Qd8 18. Ndc3 exd4 19. Bxd4 dxe4 20. Nxe4 O-O 21. Nd6
Bd5 22. b4 1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "8"]
[White "Smejkal, Jan"]
[Black "Unzicker, Wolfgang"]
[Result "0-1"]
[ECO "E04"]
[WhiteElo "2565"]
[BlackElo "2510"]
[PlyCount "134"]
[EventDate "1980.??.??"]

1. c4 e6 2. g3 Nf6 3. Bg2 d5 4. d4 dxc4 5. Nf3 Nbd7 6. Nbd2 Nb6 7. O-O Be7 8.
Qc2 O-O 9. Nxc4 Nxc4 10. Qxc4 c6 11. Qc2 Qb6 12. Bd2 Bd7 13. Rfc1 Rac8 14. b4
Rfd8 15. Rab1 Be8 16. e4 h6 17. h3 Nd7 18. Bf4 Nf8 19. Rd1 Ng6 20. Be3 Qc7 21.
a3 b6 22. Bf1 Qb7 23. Bd3 Nf8 24. Qe2 Qa8 25. Nd2 Nd7 26. Ba6 Rc7 27. Bf4 e5
28. dxe5 g5 29. Be3 Nxe5 30. f4 Ng6 31. Bc4 b5 32. Bb3 c5 33. Bd5 Bc6 34. Bxc5
gxf4 35. gxf4 Bxd5 36. exd5 Rxd5 37. Ne4 Rf5 38. Qg2 Qc6 39. Rf1 Bxc5+ 40. bxc5
Re7 41. Rbe1 Kf8 42. Re3 Nxf4 43. Qg4 Rxe4 44. Qxf5 Rxe3 45. Qxf4 Re7 46. Qd4
Re6 47. Rf4 Ke7 48. Qf2 Rg6+ 49. Rg4 Rxg4+ 50. hxg4 Qe4 51. Qh4+ Kd7 52. Qh5
Qe6 53. Kg2 Kc6 54. Kg3 a5 55. Qh1+ Kxc5 56. Qc1+ Kb6 57. Qg1+ Kb7 58. Qc5 Qc6
59. Qf8 Qc8 60. Qg7 Qe6 61. Qf8 Qe3+ 62. Kh4 Qf2+ 63. Kh3 Qf3+ 64. Kh4 Qf4 65.
Kh3 b4 66. Qc5 Qf3+ 67. Kh4 Qf6+ 0-1

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "9"]
[White "Hofland, Leo"]
[Black "Panno, Oscar"]
[Result "0-1"]
[ECO "A30"]
[WhiteElo "2300"]
[BlackElo "2540"]
[PlyCount "70"]
[EventDate "1980.??.??"]

1. c4 Nf6 2. Nc3 c5 3. Nf3 b6 4. g3 Bb7 5. Bg2 g6 6. O-O Bg7 7. d4 Ne4 8. Nxe4
Bxe4 9. dxc5 bxc5 10. Ng5 Bxg2 11. Kxg2 Qb6 12. Rb1 a5 13. Be3 d6 14. h4 Qc6+
15. f3 Nd7 16. Ne4 a4 17. Qd2 Qa6 18. Rfc1 Ne5 19. b3 axb3 20. axb3 O-O 21. Bh6
Qa2 22. Qxa2 Rxa2 23. Bxg7 Kxg7 24. Nc3 Ra7 25. Ra1 Rfa8 26. Ra4 Rxa4 27. Nxa4
Rb8 28. Rc3 Nc6 29. Re3 Kf8 30. h5 Nd4 31. hxg6 hxg6 32. Kf2 Nxb3 33. Nc3 Nd2
34. Nd5 Nxc4 35. Rxe7 Nb6 0-1

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "9"]
[White "Langeweg, Kick"]
[Black "Borm, Frans"]
[Result "1/2-1/2"]
[ECO "A30"]
[WhiteElo "2425"]
[BlackElo "2355"]
[PlyCount "70"]
[EventDate "1980.??.??"]

1. Nf3 Nf6 2. c4 c5 3. Nc3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4
O-O 9. b3 d6 10. e4 Nbd7 11. Qe3 a6 12. Nd4 Qc7 13. Bb2 Rfe8 14. Rae1 Bf8 15.
Qd2 Rac8 16. Kh1 Qb8 17. Re2 Ba8 18. Rfe1 Nc5 19. f3 Red8 20. Qe3 Re8 21. Qd2
Red8 22. Qe3 Re8 23. Rd2 Nfd7 24. Red1 Nf6 25. Qe2 Ncd7 26. Qf1 Nc5 27. Qe2
Ncd7 28. Qf1 Nc5 29. Qf2 Bb7 30. Re1 Ba8 31. Qe2 Ncd7 32. Nc2 Red8 33. Nd4 Re8
34. Ba1 Bb7 35. Bb2 Ba8 1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "9"]
[White "Ligterink, Gert"]
[Black "Bohm, Hans"]
[Result "1-0"]
[ECO "C82"]
[WhiteElo "2455"]
[BlackElo "2430"]
[PlyCount "101"]
[EventDate "1980.??.??"]

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 Bc5 10. Qe2 O-O 11. Be3 Bxe3 12. Qxe3 f6 13. Rd1 Nxe5 14. Nxe5 fxe5
15. Qxe4 dxe4 16. Bxe6+ Kh8 17. Rxd8 Raxd8 18. Bg4 c5 19. a4 b4 20. a5 Rf6 21.
Be2 g6 22. g3 Kg7 23. Ra4 Rfd6 24. cxb4 Rd1+ 25. Bxd1 Rxd1+ 26. Kg2 Rxb1 27.
bxc5 e3 28. Re4 exf2 29. Kxf2 Rxb2+ 30. Re2 Rb5 31. Rc2 Rb7 32. Ke3 Kf6 33. c6
Rc7 34. Rb2 Ke6 35. Rb6 Kd5 36. Rxa6 e4 37. Rb6 Rf7 38. Rb5+ Kxc6 39. Re5 Kd6
40. Rxe4 Ra7 41. Ra4 Ra6 42. Kd4 Kd7 43. g4 Kc7 44. Ke5 Kb7 45. h4 Ka7 46. Kf4
Rc6 47. Kg5 Ka6 48. Kh6 Rc7 49. g5 Rf7 50. Re4 Kxa5 51. Re8 1-0

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "9"]
[White "Sznapik, Aleksander"]
[Black "Ree, Hans"]
[Result "1/2-1/2"]
[ECO "B85"]
[WhiteElo "2460"]
[BlackElo "2520"]
[PlyCount "103"]
[EventDate "1980.??.??"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 Be7 7. O-O O-O 8. f4
Nc6 9. Be3 a6 10. Qe1 Bd7 11. Qg3 b5 12. a3 Nxd4 13. Bxd4 Bc6 14. Bd3 Qd7 15.
Rae1 a5 16. e5 dxe5 17. Bxe5 g6 18. f5 Nh5 19. Qh3 exf5 20. Bxf5 Qb7 21. Be4 b4
22. Qf3 Bxe4 23. Nxe4 Qb6+ 24. Kh1 Rac8 25. axb4 axb4 26. c3 Qc6 27. cxb4 Bxb4
28. Rd1 f5 29. Rd4 Be7 30. Qb3+ Rf7 31. Nd6 Bxd6 32. Rxd6 Qc4 33. Rd8+ Rf8 34.
Rxf8+ Kxf8 35. Bd6+ Kg8 36. Qxc4+ Rxc4 37. b4 Nf6 38. Rb1 Ne4 39. Be5 Nd2 40.
Rd1 Rxb4 41. Bc3 Rb1 42. Rxb1 Nxb1 43. Bb4 Kf7 44. Kg1 Ke6 45. Kf2 Kd5 46. Kf3
Kc4 47. Ba5 Nc3 48. Bxc3 Kxc3 49. Kf4 Kd3 50. h4 Ke2 51. h5 gxh5 52. Kxf5
1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "9"]
[White "Unzicker, Wolfgang"]
[Black "Rogoff, Kenneth"]
[Result "1/2-1/2"]
[ECO "C43"]
[WhiteElo "2510"]
[BlackElo "2520"]
[PlyCount "34"]
[EventDate "1980.??.??"]

1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 4. Bd3 d5 5. Nxe5 Nd7 6. Qe2 Nxe5 7. Bxe4 dxe4
8. Qxe4 Be6 9. Qxe5 Qd7 10. Nc3 O-O-O 11. Be3 Bb4 12. O-O f6 13. Qf4 Bd6 14.
Qf3 Bg4 15. Qd5 Bxh2+ 16. Kxh2 Qxd5 17. Nxd5 Rxd5 1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "9"]
[White "Van Wijgerden, Cor"]
[Black "Smejkal, Jan"]
[Result "1-0"]
[ECO "C84"]
[WhiteElo "2435"]
[BlackElo "2565"]
[PlyCount "81"]
[EventDate "1980.??.??"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d4 exd4 6. O-O Be7 7. Re1 b5 8. Bb3
d6 9. Bd5 Nxd5 10. exd5 Ne5 11. Nxd4 O-O 12. a4 Bd7 13. Nc3 b4 14. Ne4 Re8 15.
b3 Qc8 16. Bb2 Qb7 17. f4 Ng4 18. Nc6 Bf8 19. h3 f5 20. Ng5 Nf6 21. Qf3 h6 22.
Bxf6 hxg5 23. Bxg5 Bxc6 24. dxc6 Qb6+ 25. Kh2 Qc5 26. Re2 d5 27. Re5 Rxe5 28.
fxe5 Re8 29. Re1 g6 30. Bf6 Re6 31. Kh1 Qc3 32. Qxc3 bxc3 33. Rd1 Bg7 34. Bxg7
Kxg7 35. Rxd5 Rxc6 36. Kg1 Kh6 37. Kf2 Kg5 38. Kf3 Kh5 39. Kf4 Kh6 40. Rd7 Rc5
41. g4 1-0

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "10"]
[White "Borm, Frans"]
[Black "Ligterink, Gert"]
[Result "1/2-1/2"]
[ECO "B58"]
[WhiteElo "2355"]
[BlackElo "2455"]
[PlyCount "114"]
[EventDate "1980.??.??"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nf3 h6 8. O-O
Be7 9. Re1 O-O 10. h3 a6 11. Bf1 Re8 12. Be3 Bf8 13. a4 Nb4 14. a5 d5 15. Nxd5
Nfxd5 16. exd5 Qxd5 17. Qxd5 Nxd5 18. c3 Nxe3 19. Rxe3 f6 20. Bc4+ Be6 21.
Bxe6+ Rxe6 22. Rd3 e4 23. Nd4 Re5 24. Rdd1 Rd8 25. Kf1 f5 26. Ke2 Be7 27. f4
exf3+ 28. Kxf3 Bf6 29. Re1 Rxe1 30. Rxe1 Bxd4 31. cxd4 Rxd4 32. Re5 Rb4 33.
Rxf5 Rxb2 34. g3 Rb3+ 35. Kf4 b5 36. axb6 Rxb6 37. Rc5 Kf7 38. Rc7+ Kf6 39. Ra7
Re6 40. Kf3 Rb6 41. Kf4 g6 42. Ra8 Rb4+ 43. Kf3 Rb3+ 44. Kf4 Rb4+ 45. Kf3 Rb3+
46. Kf4 g5+ 47. Kg4 Rb6 48. Re8 Re6 49. Ra8 Ke5 50. h4 gxh4 51. gxh4 Kd5 52.
Kf5 Rc6 53. h5 Kc5 54. Ke4 Kb5 55. Rb8+ Rb6 56. Rg8 a5 57. Rg6 Rc6 1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "10"]
[White "Panno, Oscar"]
[Black "Unzicker, Wolfgang"]
[Result "1-0"]
[ECO "A25"]
[WhiteElo "2540"]
[BlackElo "2510"]
[PlyCount "95"]
[EventDate "1980.??.??"]

1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e3 Nge7 6. Nge2 d6 7. d3 O-O 8. O-O
Be6 9. Nd5 Qd7 10. Qd2 Nf5 11. b3 Nd8 12. e4 Ne7 13. Bb2 Ndc6 14. d4 Nxd4 15.
Nxd4 exd4 16. Bxd4 Bxd4 17. Qxd4 Bxd5 18. cxd5 c6 19. dxc6 Nxc6 20. Qa4 Qc7 21.
Rfd1 Rad8 22. Rd5 Rfe8 23. Rc1 a6 24. Qd4 Rd7 25. Qd2 Re5 26. h4 h5 27. Kh2 Qb8
28. Rd3 Rd8 29. f4 Ree8 30. Rd1 Qa7 31. Qb2 Qb8 32. b4 Qc7 33. a3 Qb8 34. Qf6
Re6 35. Qc3 Ree8 36. R1d2 Qc7 37. Rd5 Qb8 38. Qf6 Re6 39. Qa1 Ne7 40. R5d3 Nc6
41. Qd1 Ne7 42. f5 Re5 43. Rxd6 Rxd6 44. Rxd6 Qc7 45. Rd8+ Kg7 46. Rd7 Qb8 47.
Qd4 Nc6 48. Qd2 1-0

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "10"]
[White "Ree, Hans"]
[Black "Bohm, Hans"]
[Result "1-0"]
[ECO "A81"]
[WhiteElo "2520"]
[BlackElo "2430"]
[PlyCount "75"]
[EventDate "1980.??.??"]

1. d4 f5 2. g3 Nf6 3. Bg2 g6 4. Nf3 Bg7 5. O-O O-O 6. b3 d6 7. Bb2 c6 8. Nbd2
a5 9. a3 Ne4 10. c4 Qb6 11. e3 Nxd2 12. Nxd2 Na6 13. Bc3 Be6 14. Qc2 Bf7 15.
Rfb1 e5 16. c5 dxc5 17. dxe5 Qc7 18. Nc4 a4 19. Ba5 axb3 20. Rxb3 Qe7 21. Rb6
Ra7 22. Rab1 Qe6 23. Bf1 Rb8 24. Nd6 Nc7 25. Nxb7 Qxe5 26. Nxc5 Rxb6 27. Bxb6
Ra8 28. Bxc7 Qxc7 29. Rb7 Qc8 30. Bc4 Bxc4 31. Qxc4+ Kh8 32. a4 Qg8 33. Qb4 Rd8
34. h4 Be5 35. Nd7 Qd5 36. Qe7 Qd1+ 37. Kg2 Qd5+ 38. Kh2 1-0

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "10"]
[White "Rogoff, Kenneth"]
[Black "Van Wijgerden, Cor"]
[Result "1/2-1/2"]
[ECO "A42"]
[WhiteElo "2520"]
[BlackElo "2435"]
[PlyCount "45"]
[EventDate "1980.??.??"]

1. e4 g6 2. d4 Bg7 3. c4 d6 4. Nc3 f5 5. exf5 Bxf5 6. Nf3 Nh6 7. Be2 O-O 8. O-O
Na6 9. Bg5 Qd7 10. Qd2 Nf7 11. Be3 Rae8 12. Rad1 Qc8 13. a3 e5 14. dxe5 Nxe5
15. Nxe5 Bxe5 16. b4 Nb8 17. Rfe1 Nc6 18. Bf1 Bg7 19. Bh6 Qd7 20. Bxg7 Qxg7 21.
Nd5 Be6 22. Rc1 Qf7 23. Re3 1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "10"]
[White "Smejkal, Jan"]
[Black "Langeweg, Kick"]
[Result "1/2-1/2"]
[ECO "A33"]
[WhiteElo "2565"]
[BlackElo "2425"]
[PlyCount "115"]
[EventDate "1980.??.??"]

1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. g3 Bc5 7. e3 d5 8. cxd5
exd5 9. Bg2 O-O 10. O-O Bg4 11. Nxc6 bxc6 12. Qc2 Rc8 13. b3 Re8 14. Bb2 Bf8
15. Rac1 Nd7 16. h3 Bh5 17. Ne2 Bg6 18. Qd2 Be4 19. Bxe4 Rxe4 20. Nd4 Nb8 21.
Rc2 Qd7 22. Kg2 c5 23. Ne2 d4 24. exd4 Rce8 25. Qd3 Nc6 26. Rd2 Qb7 27. d5 Nb4
28. Qf3 Nxd5 29. Nc1 Nb6 30. Nd3 Qa6 31. Nf4 Re1 32. Rxe1 Rxe1 33. Nd3 Re8 34.
Ne5 f6 35. Ng4 Re1 36. Ne3 Qxa2 37. Nc4 Qa6 38. Rd8 Nxc4 39. Qd5+ Qe6 40. bxc4
Qxd5+ 41. cxd5 Kf7 42. Ra8 Re7 43. Kf3 Rd7 44. Ke4 f5+ 45. Kxf5 Rxd5+ 46. Be5
Rd7 47. Ke4 Be7 48. f4 Bd8 49. f5 Bb6 50. g4 Rd8 51. Rxd8 Bxd8 52. Kd5 Be7 53.
Bc3 Bf6 54. Bd2 Bd4 55. g5 Bf2 56. Kd6 h6 57. gxh6 gxh6 58. Bxh6 1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "10"]
[White "Sznapik, Aleksander"]
[Black "Hofland, Leo"]
[Result "1/2-1/2"]
[ECO "B16"]
[WhiteElo "2460"]
[BlackElo "2300"]
[PlyCount "86"]
[EventDate "1980.??.??"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ gxf6 6. c3 Bf5 7. Ne2 h5 8.
Ng3 Bg6 9. h4 Nd7 10. Be2 Qa5 11. b4 Qc7 12. O-O e6 13. b5 cxb5 14. Bxb5 Bd6
15. Qf3 O-O-O 16. Bd2 a6 17. Be2 Rdg8 18. Rfc1 Ba3 19. Re1 Bc2 20. Bf4 e5 21.
Bc1 Bd6 22. Nf5 Rg4 23. Nxd6+ Qxd6 24. Qh3 Rg6 25. Bd2 Rhg8 26. Bf1 Qd5 27.
Rac1 Bf5 28. c4 Bxh3 29. cxd5+ Kb8 30. g3 Bxf1 31. Kxf1 Rg4 32. dxe5 Nxe5 33.
Rcd1 Kc7 34. Bf4 Kd6 35. Rb1 b5 36. a4 Rb8 37. axb5 axb5 38. Ra1 Kxd5 39. Red1+
Ke6 40. Ra6+ Kf5 41. Rdd6 Rg6 42. Rdb6 Rxb6 43. Rxb6 Rg8 1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "11"]
[White "Bohm, Hans"]
[Black "Borm, Frans"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "2430"]
[BlackElo "2355"]
[PlyCount "129"]
[EventDate "1980.??.??"]

1. d4 d5 2. Nf3 Nf6 3. Bf4 c6 4. e3 Qb6 5. b3 Bf5 6. Be2 Qa5+ 7. Kf1 Nbd7 8. a3
h6 9. b4 Qd8 10. Nbd2 e6 11. h3 Be7 12. c3 Bh7 13. Ne5 Nxe5 14. Bxe5 O-O 15.
Bxf6 Bxf6 16. f4 a5 17. Nf3 b6 18. Kf2 c5 19. Bd3 Be4 20. bxc5 bxc5 21. Rb1 a4
22. Bxe4 dxe4 23. Nd2 cxd4 24. cxd4 Bxd4 25. Nxe4 Bf6 26. Qxd8 Rfxd8 27. Nxf6+
gxf6 28. Rhd1 Rxd1 29. Rxd1 h5 30. Rd4 f5 31. Rb4 Kg7 32. Kf3 Kf6 33. Rb5 Rc8
34. Rb4 Ra8 35. Rc4 Ra5 36. Rc8 Kg7 37. Ke2 Kh7 38. Kf3 Kg7 39. Kg3 Rb5 40. Ra8
Rb3 41. Rxa4 Rxe3+ 42. Kh4 Kg6 43. Ra6 Re4 44. Kg3 Re3+ 45. Kf2 Rb3 46. a4 h4
47. Ra8 Rb4 48. Ke3 Rb3+ 49. Kd4 Rb4+ 50. Kc5 Rxf4 51. a5 Ra4 52. a6 Ra2 53.
Kb6 Rb2+ 54. Ka7 Kf6 55. Rg8 f4 56. Ka8 e5 57. a7 Kf5 58. Rb8 Rxg2 59. Rb6 f3
60. Kb7 Rg8 61. Rb2 e4 62. Rc2 e3 63. Rc5+ Kg6 64. a8=Q Rxa8 65. Rg5+ 0-1

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "11"]
[White "Hofland, Leo"]
[Black "Ree, Hans"]
[Result "0-1"]
[ECO "D90"]
[WhiteElo "2300"]
[BlackElo "2520"]
[PlyCount "98"]
[EventDate "1980.??.??"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. cxd5 Nxd5 6. Qb3 Nxc3 7. bxc3 c5 8.
e3 O-O 9. Be2 Nc6 10. O-O Na5 11. Qa3 Qc7 12. Bd2 Be6 13. Rfc1 Nc4 14. Qa4 Nxd2
15. Nxd2 Rfc8 16. Nb3 b6 17. Ba6 Rd8 18. Be2 Bd5 19. Nd2 Rac8 20. Qa3 e5 21. e4
Bh6 22. exd5 Bxd2 23. Rd1 Bh6 24. dxc5 Qxc5 25. Qxc5 Rxc5 26. c4 Bf8 27. a4 Bd6
28. Rdb1 Rdc8 29. Rb5 e4 30. g3 f5 31. Kg2 Kf7 32. Rab1 Kf6 33. f4 h6 34. Rxc5
Bxc5 35. a5 bxa5 36. Rb7 a4 37. Bd1 a3 38. Bb3 g5 39. Kf1 gxf4 40. gxf4 Rg8 41.
Rc7 Rg1+ 42. Ke2 Rg2+ 43. Kd1 Bd4 44. Rc6+ Kg7 45. d6 e3 46. Rc7+ Kg6 47. Re7
a2 48. Bxa2 Rxa2 49. d7 Rd2+ 0-1

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "11"]
[White "Langeweg, Kick"]
[Black "Rogoff, Kenneth"]
[Result "1/2-1/2"]
[ECO "A33"]
[WhiteElo "2425"]
[BlackElo "2520"]
[PlyCount "54"]
[EventDate "1980.??.??"]

1. Nf3 c5 2. c4 Nf6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. Ndb5 Bc5 7. Bf4 O-O 8.
Bd6 Qb6 9. Bxc5 Qxc5 10. Nd6 Nd4 11. e3 Qxd6 12. exd4 Qc6 13. Qd2 b6 14. f3 d5
15. cxd5 Nxd5 16. Bb5 Qd6 17. Ne4 Qe7 18. O-O Bb7 19. a3 Rac8 20. Rfe1 Rc7 21.
Rad1 Rfc8 22. Bd3 Qd8 23. Qf2 Ne7 24. Nc3 Rd7 25. Bb5 Rdc7 26. Bd3 Rd7 27. Bb5
Rdc7 1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "11"]
[White "Ligterink, Gert"]
[Black "Smejkal, Jan"]
[Result "0-1"]
[ECO "D85"]
[WhiteElo "2455"]
[BlackElo "2565"]
[PlyCount "190"]
[EventDate "1980.??.??"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 c5 8.
Be3 Qa5 9. Qd2 Nc6 10. Rc1 cxd4 11. cxd4 Qxd2+ 12. Kxd2 O-O 13. Bb5 f5 14. d5
fxe4 15. dxc6 exf3 16. gxf3 bxc6 17. Rxc6 Bb7 18. Rc7 Rad8+ 19. Kc2 Bxf3 20.
Rc1 Rb8 21. Bc4+ Kh8 22. Kd2 Rfd8+ 23. Ke1 Bb2 24. Bd2 Rxd2 25. Kxd2 Bxc1+ 26.
Kxc1 Rb7 27. Rc5 Rd7 28. Kc2 Kg7 29. Kc3 Kf6 30. a4 h5 31. a5 h4 32. a6 g5 33.
Rc8 g4 34. Bd3 e6 35. Rc5 e5 36. Rc8 h3 37. Rh8 e4 38. Bc4 Rd1 39. Rh7 Rh1 40.
Rxa7 e3 41. Rf7+ Kg6 42. a7 Bc6 43. Re7 Rc1+ 44. Kb3 Rxc4 45. Re6+ Kf5 46. Rxc6
Rxc6 47. a8=Q exf2 48. Qxc6 f1=Q 49. Qd7+ Ke4 50. Qxg4+ Ke3 51. Qg3+ Qf3 52.
Qe5+ Kf2+ 53. Kc2 Kg1 54. Kd2 Qg2+ 55. Kd3 Kh1 56. Qf4 Kg1 57. Qe3+ Kxh2 58.
Kc4 Qg4+ 59. Kb5 Qf5+ 60. Ka4 Kg2 61. Qe2+ Kg3 62. Qe3+ Kg4 63. Qe2+ Kg5 64.
Qe7+ Kf4 65. Qc7+ Ke3 66. Qc1+ Kf2 67. Qd2+ Kg3 68. Qe3+ Kg4 69. Qe2+ Qf3 70.
Qe6+ Kg3 71. Qe1+ Qf2 72. Qc3+ Qf3 73. Qe1+ Kg2 74. Qd2+ Kf1 75. Qc1+ Ke2 76.
Qb2+ Ke1 77. Qb4+ Kf1 78. Qb5+ Kf2 79. Qc5+ Kg3 80. Qg1+ Kf4 81. Qc1+ Qe3 82.
Qc7+ Kf3 83. Ka5 Qf4 84. Qc6+ Kg4 85. Ka6 h2 86. Qc8+ Qf5 87. Qg8+ Kf4 88. Qb8+
Qe5 89. Qb4+ Kg3 90. Qb3+ Kf2 91. Qf7+ Ke1 92. Qh7 Qd6+ 93. Ka7 Qc5+ 94. Kb8
Qb6+ 95. Ka8 Qc6+ 0-1

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "11"]
[White "Unzicker, Wolfgang"]
[Black "Sznapik, Aleksander"]
[Result "1/2-1/2"]
[ECO "B83"]
[WhiteElo "2510"]
[BlackElo "2460"]
[PlyCount "29"]
[EventDate "1980.??.??"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 Be7 7. O-O Nc6 8.
Be3 O-O 9. f4 e5 10. Nb3 exf4 11. Bxf4 Be6 12. Kh1 d5 13. e5 Nd7 14. Nxd5 Ndxe5
15. Nxe7+ 1/2-1/2

[Event "Amsterdam IBM I"]
[Site "?"]
[Date "1980.??.??"]
[Round "11"]
[White "Van Wijgerden, Cor"]
[Black "Panno, Oscar"]
[Result "1/2-1/2"]
[ECO "B21"]
[WhiteElo "2435"]
[BlackElo "2540"]
[PlyCount "83"]
[EventDate "1980.??.??"]

1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 Bb4 7. O-O Bxc3 8.
bxc3 Nge7 9. Ba3 d5 10. exd5 exd5 11. Bd3 h6 12. Re1 O-O 13. Nd4 Re8 14. Nb5
Qa5 15. Bd6 Be6 16. Nc7 Qxc3 17. Nxa8 Rxa8 18. Rb1 b6 19. Re3 Qf6 20. Rc1 Rd8
21. Ba3 d4 22. Rf3 Qe5 23. Qd2 Rd7 24. Bb1 Qd5 25. Rg3 Kh8 26. Re1 Nf5 27. Be4
Qa5 28. Rd3 Qxd2 29. Rxd2 Na5 30. Rc2 g6 31. Bd3 Kg7 32. Rec1 Kf6 33. Bb4 Rd5
34. Rc7 Nd6 35. Rxa7 Nb5 36. Be7+ Kg7 37. Ra8 Nc3 38. Rd8 Nxa2 39. Rb1 Nb3 40.
Rxb3 Rxd8 41. Bxd8 Bxb3 42. Bxb6 1/2-1/2

