[Event "Torneo Internazionale IBM"]
[Site "Amsterdam NED"]
[Date "1969.07.??"]
[Round "1"]
[White "Tatai, Stefano"]
[Black "Stein, Leonid"]
[Result "1/2-1/2"]
[ECO "B61"]
[PlyCount "61"]
[EventDate "1969.07.15"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 Bd7 7. Qd2 Nxd4 8.
Qxd4 Qa5 9. Bd2 e5 10. Nd5 Qxd5 11. Qxd5 Nxd5 12. exd5 Be7 13. c4 f5 14. Be2
Bf6 15. Bc3 Ke7 16. O-O Rhe8 17. Rfe1 e4 18. Bxf6+ Kxf6 19. f4 exf3 20. Bxf3
Rxe1+ 21. Rxe1 a5 22. Kf2 Rc8 23. b3 a4 24. Rb1 axb3 25. Rxb3 Rxc4 26. Rxb7 Be8
27. Rb6 Ke5 28. Rb7 Rc2+ 29. Kf1 Kf6 30. Rb6 Ke7 31. Rb7+ 1/2-1/2

[Event "Torneo Internazionale IBM"]
[Site "Amsterdam NED"]
[Date "1969.07.??"]
[Round "2"]
[White "Kavalek, Lubomir"]
[Black "Tatai, Stefano"]
[Result "1/2-1/2"]
[ECO "D78"]
[PlyCount "32"]
[EventDate "1969.07.15"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O O-O 5. c4 c6 6. d4 d5 7. b3 Bf5 8. Bb2 a5
9. Nc3 Ne4 10. Rc1 Nxc3 11. Bxc3 Be4 12. e3 a4 13. bxa4 dxc4 14. a5 c5 15. dxc5
Bxc3 16. Rxc3 Nc6 1/2-1/2

[Event "Torneo Internazionale IBM"]
[Site "Amsterdam NED"]
[Date "1969.07.??"]
[Round "3"]
[White "Tatai, Stefano"]
[Black "Damjanovic, Mato"]
[Result "1-0"]
[ECO "B44"]
[PlyCount "78"]
[EventDate "1969.07.15"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e6 5. Nb5 d6 6. c4 Nf6 7. N1c3 a6 8. Na3
Be7 9. Be2 O-O 10. O-O b6 11. Be3 Bb7 12. Qd2 Ne5 13. f3 d5 14. exd5 exd5 15.
cxd5 b5 16. Rfd1 Re8 17. d6 Bf8 18. Nc2 Re6 19. Bc5 Nfd7 20. Ba3 Rg6 21. Qe3
Rc8 22. Kh1 Qf6 23. Nd4 Rh6 24. Ne4 Qh4 25. h3 g6 26. Rac1 Re8 27. Rc7 Ng4 28.
Qg5 Nf2+ 29. Kg1 Nxh3+ 30. gxh3 Qxh3 31. Qg2 Qh4 32. Rxb7 Bg7 33. Rxd7 Rxe4 34.
fxe4 Bxd4+ 35. Kf1 Qf4+ 36. Bf3 Bb6 37. Rb7 Rh2 38. Rxb6 Rxg2 39. Kxg2 Qg5+ 1-0

[Event "Torneo Internazionale IBM"]
[Site "Amsterdam NED"]
[Date "1969.07.??"]
[Round "4"]
[White "Byrne, Robert Eugene"]
[Black "Tatai, Stefano"]
[Result "1/2-1/2"]
[ECO "B05"]
[PlyCount "36"]
[EventDate "1969.07.15"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. Be2 e6 6. O-O Be7 7. c4 Nb6 8. exd6
cxd6 9. b3 O-O 10. Bb2 Nc6 11. Na3 d5 12. c5 Nd7 13. Nc2 b6 14. b4 bxc5 15.
dxc5 Bxf3 16. Bxf3 Rb8 17. Bc3 Nde5 18. Rb1 Bf6 1/2-1/2

[Event "Torneo Internazionale IBM"]
[Site "Amsterdam NED"]
[Date "1969.07.??"]
[Round "5"]
[White "Tatai, Stefano"]
[Black "Darga, Klaus"]
[Result "1/2-1/2"]
[ECO "B43"]
[PlyCount "83"]
[EventDate "1969.07.15"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Be2 Nf6 7. O-O Bb4 8.
Qd3 Nc6 9. Bd2 Nxd4 10. Qxd4 Bc5 11. Qd3 b5 12. Rae1 Rb8 13. Bd1 b4 14. Na4 Bd6
15. f4 e5 16. Qg3 O-O 17. f5 Re8 18. Bg5 Be7 19. b3 Bb7 20. c4 bxc3 21. Nxc3
Rbc8 22. Bxf6 Bxf6 23. Nd5 Bxd5 24. exd5 Qc5+ 25. Kh1 Qxd5 26. Be2 Qa8 27. Qd3
d5 28. Qxa6 e4 29. Qxa8 Rxa8 30. Bb5 Bc3 31. Bxe8 Rxe8 32. Re2 d4 33. Rd1 g6
34. f6 Kf8 35. Rc2 e3 36. Re2 Re6 37. g3 Rxf6 38. Kg2 h5 39. Rd3 g5 40. Rexe3
dxe3 41. Rxc3 Rf2+ 42. Kg1 1/2-1/2

[Event "Torneo Internazionale IBM"]
[Site "Amsterdam NED"]
[Date "1969.07.??"]
[Round "6"]
[White "Gheorghiu, Florin"]
[Black "Tatai, Stefano"]
[Result "1-0"]
[ECO "A17"]
[PlyCount "80"]
[EventDate "1969.07.15"]

1. c4 Nf6 2. Nc3 e6 3. Nf3 Bb4 4. Qc2 O-O 5. a3 Bxc3 6. Qxc3 b6 7. e3 Bb7 8. b4
a5 9. Bb2 Qe7 10. Be2 axb4 11. axb4 Rxa1+ 12. Bxa1 Na6 13. b5 Nc5 14. O-O Ra8
15. Qc2 Ra3 16. Bc3 Na4 17. Bd4 Ne4 18. Rb1 Ng5 19. Nxg5 Qxg5 20. Bf1 e5 21.
Ra1 Rxa1 22. Bxa1 Nc5 23. Qa2 e4 24. Bd4 Ne6 25. Qa7 Bc8 26. Qa8 Qd8 27. Qxe4
d6 28. Bd3 g6 29. Bc3 Nc5 30. Qd4 f6 31. Bc2 Kg7 32. h4 Qe7 33. h5 gxh5 34. Qh4
Qf7 35. Qg5+ Kf8 36. Bxf6 Ne6 37. Qh6+ Ke8 38. Bxh7 Nf8 39. Bd3 Be6 40. Bg7 Ke7
1-0

[Event "Torneo Internazionale IBM"]
[Site "Amsterdam NED"]
[Date "1969.07.??"]
[Round "7"]
[White "Tatai, Stefano"]
[Black "Portisch, Lajos"]
[Result "0-1"]
[ECO "B43"]
[PlyCount "66"]
[EventDate "1969.07.15"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Be2 b5 7. O-O Bb7 8. Bf3
Nc6 9. Nxc6 dxc6 10. Be3 Nf6 11. a4 Bd6 12. g3 O-O 13. Qe2 b4 14. Nb1 a5 15.
Rc1 Nd7 16. Qe1 f5 17. exf5 exf5 18. Rd1 Rae8 19. Qd2 Ne5 20. Be2 Rd8 21. Qe1
c5 22. Nd2 c4 23. Qf1 Qc6 24. f3 c3 25. bxc3 Qxc3 26. Nc4 Nxc4 27. Bxc4+ Kh8
28. Bb6 Rc8 29. Qd3 Be5 30. Be6 Qxd3 31. cxd3 Rc6 32. Bc5 Bxa1 33. Bxf8 Bd4+
0-1

[Event "Torneo Internazionale IBM"]
[Site "Amsterdam NED"]
[Date "1969.07.??"]
[Round "8"]
[White "Ivkov, Borislav"]
[Black "Tatai, Stefano"]
[Result "1-0"]
[ECO "E17"]
[PlyCount "47"]
[EventDate "1969.07.15"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. Nc3 Ne4 7. Bd2 O-O 8. d5
Nxc3 9. Bxc3 Bf6 10. Nd4 c6 11. O-O cxd5 12. cxd5 Bxd5 13. Bxd5 exd5 14. Nb5
Nc6 15. Qxd5 Re8 16. Bxf6 Qxf6 17. Nc3 Qe6 18. Rad1 Ne5 19. Nb5 Qxd5 20. Rxd5
Re7 21. Rfd1 Kf8 22. b3 Ng4 23. Rxd7 Rxe2 24. Nc7 1-0

[Event "Torneo Internazionale IBM"]
[Site "Amsterdam NED"]
[Date "1969.07.??"]
[Round "9"]
[White "Tatai, Stefano"]
[Black "Barendregt, Johan T."]
[Result "1/2-1/2"]
[ECO "B07"]
[PlyCount "111"]
[EventDate "1969.07.15"]

1. e4 d6 2. d4 Nf6 3. Nc3 e5 4. Nf3 Nbd7 5. g3 g6 6. Bg2 Bg7 7. O-O O-O 8. Re1
c6 9. a4 Re8 10. h3 Qc7 11. Be3 b6 12. dxe5 dxe5 13. a5 b5 14. Nd2 Nf8 15. b4
Ne6 16. Na2 Ba6 17. Qb1 Red8 18. Nb3 Bf8 19. Qb2 Rd7 20. Rad1 Rad8 21. Qa1 Be7
22. Rxd7 Rxd7 23. Rd1 Rxd1+ 24. Qxd1 c5 25. bxc5 Nxc5 26. Nxc5 Bxc5 27. Bxc5
Qxc5 28. Qf3 Ne8 29. Qc3 Qxc3 30. Nxc3 Nd6 31. f3 Bb7 32. Bf1 Bc6 33. Na2 Nb7
34. a6 Nc5 35. Nb4 Bd7 36. Nd5 Kf8 37. Nc7 b4 38. Nd5 b3 39. cxb3 Nxb3 40. Nf6
Ke7 41. Nxh7 Nd2 42. Bg2 Bb5 43. f4 Bxa6 44. fxe5 Bb7 45. Kf2 Nc4 46. Nf6 Nxe5
47. Nd5+ Bxd5 48. exd5 f5 49. Ke3 Kd6 50. Kd4 Nd7 51. g4 fxg4 52. hxg4 g5 53.
Ke4 a5 54. Kf5 Nc5 55. Bf1 Kxd5 56. Bb5 1/2-1/2

[Event "Torneo Internazionale IBM"]
[Site "Amsterdam NED"]
[Date "1969.07.??"]
[Round "10"]
[White "Hartoch, Robert G."]
[Black "Tatai, Stefano"]
[Result "1/2-1/2"]
[ECO "A36"]
[PlyCount "112"]
[EventDate "1969.07.15"]

1. c4 g6 2. g3 Bg7 3. Bg2 c5 4. Nc3 Nc6 5. a3 e6 6. e4 Nge7 7. Nge2 O-O 8. O-O
a6 9. Rb1 b5 10. cxb5 axb5 11. b4 cxb4 12. axb4 d5 13. d3 d4 14. Nxb5 Rb8 15.
Na3 Rxb4 16. Rxb4 Nxb4 17. Qb3 Nbc6 18. Bd2 e5 19. f4 Be6 20. Qc2 Qc8 21. Nb5
Qd7 22. Qc5 Rb8 23. Rc1 Na5 24. Bxa5 Rxb5 25. Qc7 Qxc7 26. Bxc7 Rb2 27. Bf1 Bg4
28. Kf2 exf4 29. Bxf4 f5 30. e5 Nd5 31. Ke1 Bxe2 32. Bxe2 Nc3 33. Bf1 Kf7 34.
Ra1 Rb1+ 35. Rxb1 Nxb1 36. Bg2 Ke6 37. Bb7 Bxe5 38. Bc1 Nc3 39. Ba6 Kf6 40. Bc4
g5 41. Kf2 f4 42. g4 Bd6 43. Kf3 Ke5 44. h3 Bb4 45. Kf2 Kd6 46. Kf3 Kc5 47. h4
h6 48. Be6 Kd6 49. Bg8 Kc6 50. hxg5 hxg5 51. Be6 Kd6 52. Bb3 Ke5 53. Bc4 Na4
54. Bb3 Nb6 55. Bc2 Nd7 56. Bb3 Nf8 1/2-1/2

[Event "Torneo Internazionale IBM"]
[Site "Amsterdam NED"]
[Date "1969.07.??"]
[Round "11"]
[White "Tatai, Stefano"]
[Black "Vasiukov, Evgeni A."]
[Result "0-1"]
[ECO "B48"]
[PlyCount "80"]
[EventDate "1969.07.15"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Bd3 Nc6 7. Be3 Nf6 8.
O-O h5 9. h3 b5 10. Nxc6 Qxc6 11. e5 b4 12. Ne2 Bb7 13. f3 Bc5 14. Bf2 Nd5 15.
Be4 Qc7 16. Bxc5 Qxc5+ 17. Qd4 Qxd4+ 18. Nxd4 Ke7 19. a3 Rhb8 20. Rfd1 Ne3 21.
Re1 Bxe4 22. Rxe3 Bd5 23. b3 a5 24. h4 a4 25. c4 axb3 26. Nxb3 Bxc4 27. axb4
Rxa1+ 28. Nxa1 Rxb4 29. Nc2 Rb1+ 30. Kh2 Rc1 31. Ne1 f6 32. f4 Kf7 33. Nf3 Rd1
34. Rc3 Bd5 35. Kg3 Kg6 36. Rc8 Rd3 37. Rg8 Kh7 38. Rf8 Bc4 39. Re8 Rd5 40. Rd8
Kg6 0-1

[Event "Torneo Internazionale IBM"]
[Site "Amsterdam NED"]
[Date "1969.07.??"]
[Round "12"]
[White "Tatai, Stefano"]
[Black "Donner, Johannes Hendrikus"]
[Result "1/2-1/2"]
[ECO "B09"]
[PlyCount "26"]
[EventDate "1969.07.15"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 O-O 6. Bd3 Nc6 7. e5 dxe5 8. dxe5
Nd5 9. Nxd5 Qxd5 10. Qe2 Bf5 11. Bxf5 gxf5 12. Be3 f6 13. exf6 Bxf6 1/2-1/2

[Event "Torneo Internazionale IBM"]
[Site "Amsterdam NED"]
[Date "1969.07.??"]
[Round "13"]
[White "Liberzon, Vladimir M."]
[Black "Tatai, Stefano"]
[Result "1-0"]
[ECO "D41"]
[PlyCount "93"]
[EventDate "1969.07.15"]

1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. d4 c5 5. cxd5 Nxd5 6. e3 Nc6 7. Bc4 Be7 8. O-O
O-O 9. Bxd5 exd5 10. dxc5 Bxc5 11. Qxd5 Qxd5 12. Nxd5 Bf5 13. b3 Rfd8 14. Nc3
Nb4 15. Bb2 Nd3 16. Na4 Nxb2 17. Nxc5 b6 18. Na6 Bd3 19. Nc7 Rac8 20. Rfc1 Bc4
21. Rc2 Rxc7 22. Rxb2 Ba6 23. Nd4 g6 24. h3 Rdc8 25. Rd2 Kf8 26. g4 Rc5 27. Kg2
Ke7 28. Kg3 h5 29. Rad1 hxg4 30. hxg4 R8c7 31. Kf4 Bc8 32. g5 Bd7 33. f3 a5 34.
Rh1 Rc8 35. Rhh2 Bf5 36. e4 Bd7 37. Rc2 Rc3 38. Rxc3 Rxc3 39. Rc2 Rd3 40. Ke5
Rd1 41. Rc7 a4 42. bxa4 Rg1 43. f4 Rg2 44. a5 bxa5 45. Ra7 Rd2 46. Rxa5 Rd1 47.
Nc2 1-0

[Event "Torneo Internazionale IBM"]
[Site "Amsterdam NED"]
[Date "1969.07.??"]
[Round "14"]
[White "Tatai, Stefano"]
[Black "Langeweg, Kick"]
[Result "1/2-1/2"]
[ECO "B44"]
[PlyCount "46"]
[EventDate "1969.07.15"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nb5 d6 6. c4 Nf6 7. N1c3 a6 8. Na3
Be7 9. Be2 O-O 10. O-O b6 11. Be3 Bb7 12. Qd2 Re8 13. Rfd1 Rc8 14. Rac1 Nd7 15.
Nab1 Nc5 16. f3 Qc7 17. Bf1 Qb8 18. Qf2 Ba8 19. Rc2 Qb7 20. Kh1 Ne5 21. Rcd2
Rc7 22. Be2 Rec8 23. Qf1 Rb8 1/2-1/2

[Event "Torneo Internazionale IBM"]
[Site "Amsterdam NED"]
[Date "1969.07.??"]
[Round "15"]
[White "Ree, Hans"]
[Black "Tatai, Stefano"]
[Result "0-1"]
[ECO "A15"]
[PlyCount "92"]
[EventDate "1969.07.15"]

1. Nf3 Nf6 2. c4 g6 3. b4 Bg7 4. Bb2 O-O 5. g3 c6 6. Bg2 a5 7. b5 d5 8. O-O
dxc4 9. bxc6 Nxc6 10. Na3 Be6 11. Ng5 Bd7 12. Nxc4 b5 13. Na3 Rb8 14. d4 e6 15.
e4 Qb6 16. Nc2 h6 17. Nh3 Rfd8 18. Nf4 Ne8 19. Rb1 Ne7 20. Ne3 b4 21. d5 Bb5
22. Re1 Rbc8 23. e5 exd5 24. Bd4 Qc6 25. h4 Bc4 26. Rb2 Qb5 27. e6 Nc6 28.
exf7+ Kxf7 29. Bxg7 Nxg7 30. Qg4 Ne5 31. Qd1 Nd3 32. Nxd3 Bxd3 33. Qf3+ Kg8 34.
Nxd5 Rf8 35. Qe3 Rce8 36. Ne7+ Rxe7 37. Qxe7 Re8 38. Qc7 Rxe1+ 39. Kh2 Bf5 40.
Rd2 Qe5 41. Rd8+ Kh7 42. Qf7 Be6 43. Qf8 g5 44. hxg5 Qxg5 45. Qh8+ Kg6 46. Bf3
Qf5 0-1

