[Event "Buenos Aires"] [Site "Buenos Aires"] [Round "0"] [White "Andersson, Ulf"] [Black "Olafsson, Fridrik"] [Result "1/2-1/2"] [EventType "tourn"] [EventRounds "13"] [EventCountry "ARG"] [ECO "A05"] [Opening "Reti: 1...Nf6"] 1.Nf3 Nf6 2.c4 c5 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7 7.d4 cxd4 8.Qxd4 O-O (8...d6!?) 9.Rd1 Qc8 10.b3 (10.Bf4 $14 {Andersson,U-Giardelli,S/ Buenos Aires/1980/}) 10...d5! 11.cxd5 Nxd5 12.Nxd5 Bxd5 13.Bb2 (13.Bg5!? f6 (13...Bxg5 14.Nxg5 Bxg2 15.Qd3! g6 16.Kxg2 $14) (13...Bc5 14.Qh4) 14.Bf4 Qb7 15.Ne1 (15.Rac1 Nc6 16.Qa4? b5) 15...Bxg2 16.Nxg2 e5 17.Qc4+ Kh8 18.Be3 Nc6 $10) 13...Bf6 14.Qd2 Nd7 15.Rac1 Qb7 (15...Qa6?! 16.Rc7 Bxb2 17.Qxb2 Nf6 18.Ne5 $14) 16.Ne1 Bxb2 17.Qxb2 (17.Bxd5 Bxc1 18.Bxb7 Bxd2 19.Bxa8 Bxe1) 17...Bxg2 18.Nxg2 Nf6 19.Ne3 Rfd8 20.Rd4 $14 h6 21.f3 (21.Nc4!? Rxd4 22.Qxd4 Qd5 23.Qxd5 Nxd5 24.e4 Nf6 25.f3 $14) 21...b5! 22.Rcd1 (22.Kf2!?) 22...Rxd4 23.Qxd4 Rc8 24.Kg2 (24.Kf2!?) 24...Qa6 25.Rd2 Qa5 26.Kf2 Qa3 27.Qd3 Qa5 28.Qd4 Qa3 29.h4 h5 30.Qe5 Qa5 31.Qb2 (31.Qd4) 31...Rd8! 32.Rxd8+ Qxd8 $10 33.Qe5 a6?! (33...Qa5?! 34.a4 a6 35.Qc5) (33...Qb6!? {/\Nd5/} 34.Kg2 Qa6 $10) 34.Qc5 $14 g6 (34...Qa5 35.a4) 35.a4 bxa4 36.bxa4 Qb8 37.a5 Nd7! 38.Qc6 Qa7 39.Qc8+ Kg7 40.Qc3+ Kf8 41.Ke1 Ke7 {#d} 1/2-1/2

[Event "Buenos Aires"] [Site "Buenos Aires"] [Round "0"] [White "Balashov, Yuri S"] [Black "Olafsson, Fridrik"] [Result "1-0"] [WhiteElo "2600"] [EventType "tourn"] [EventRounds "13"] [EventCountry "ARG"] [ECO "B45"] [Opening "Sicilian: Taimanov, 5.Nc3"] 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 a6 6. Be2 Nge7 7. Bf4 $5 (7. f4 $5) (7. Be3 $5) (7. O-O $5) 7... Ng6 8. Bg3 Be7 9. O-O (9. Nb3 $5 d6 10. Qd2 O-O 11. Rd1 Nge5 12. f4 Nd7 13. O-O b5 $14) 9... d6 10. Qd2 O-O 11. Rad1 Qb6 ( 11... Qc7 $5 12. Kh1 Rd8 13. f4 Nxd4 14. Qxd4 Bf6 15. Qe3 Bd7 16. Bh5 Be8 $10 { Torre,E-Taimanov,M/Wijk/1981/}) 12. Nb3 Rd8 13. Kh1 $14 Qc7 14. a4 Bf8 15. f4 Bd7 16. Bh5 Be8 17. Ne2 Be7 (17... Rac8 18. f5 Nge5 19. Nf4 Qd7 (19... Bd7 $2 20. Bxf7+ Kxf7 21. fxe6+ Bxe6 22. Nxe6+ Kxe6 23. Qd5+ Ke7 (23... Kd7 24. Nc5+ Ke8 25. Qg8 Ng6 26. Ne6 Qe7 27. Nxf8 Nxf8 28. Bh4 $18) 24. Bh4+ Ke8 25. Qg8 Ng6 26. Nc5 {/\Qe6,Qf7><+-/}) 20. Qe2 {/\21.fe fe 22.Nc5/} exf5 21. Nd5 fxe4 22. Nb6 {/\Nc8,Qe4+/-/]}) 18. f5 Nf8 19. fxe6 Nxe6 (19... fxe6 20. Bxe8 Rxe8 21. Bxd6 $18) 20. Nc3 Nb4 21. Nc1 $1 (21. Nd5 Nxd5 22. exd5 Nc5 23. Nxc5 Qxc5 24. Rde1 Qc7 (24... Bf8 25. Rxe8 $1)) 21... Bg5 22. Qf2 Bf6 23. Nd3 Nxd3 24. cxd3 ( 24. Rxd3 $5 Nc5 (24... Bxc3 25. Rxc3) 25. Rf3 $1 $36) 24... Qc5 (24... Bxc3 25. bxc3 g6 26. Bg4 Bxa4 27. Rc1 {/\Bh4|^/}) 25. Nd5 Qxf2 26. Bxf2 Bd4 $2 (26... Bxb2 27. Rb1 Be5 28. Rxb7 $36) (26... Bxa4 $5 27. Nxf6+ gxf6 28. Rd2 {/\Bh4+/-/ }) 27. Bxd4 Nxd4 28. Nc7 Bxa4 (28... Rac8 29. Nxe8 $18) 29. Bxf7+ Kh8 30. Ra1 Bc2 (30... Rac8 31. Rxa4 $18) 31. Nxa8 Rxa8 32. Bd5 Rb8 33. Rf7 Bxd3 34. Rd1 Rc8 35. Bxb7 {#r} 1-0

[Event "Buenos Aires"] [Site "Buenos Aires"] [Round "0"] [White "Giardelli, Sergio Carlos"] [Black "Olafsson, Fridrik"] [Result "0-1"] [WhiteElo "2300"] [EventType "tourn"] [EventRounds "13"] [EventCountry "ARG"] [ECO "A15"] [Opening "English: Anglo-Indian, 2.g3"] 1. c4 Nf6 2. g3 c6 3. Bg2 e5 4. Nf3 $6 (4. Nc3 $5 d5 5. cxd5 cxd5 6. Qb3 Nc6 7. Nxd5 Nd4 8. Nxf6+ gxf6 9. Qd1 Qc7 10. Kf1 Nc2 11. Rb1 Be6 12. b3 Rc8 13. Bb2 Ba3 $44 {Hodgson,J-Illescas Cordoba,M/Wijk aan Zee/1993/0:1 (45) Inf 56/33/}) ( 4. d4 $5 exd4 (4... d6 $5) 5. Qxd4 d5 6. Nf3 Be7 7. cxd5 cxd5 8. O-O Nc6 9. Qa4 O-O 10. Be3 Ne4 11. Nc3 $1 Nxc3 12. bxc3 Na5 13. Ne5 Be6 14. Rad1 Bf6 15. Nd3 Nc4 (15... Bxc3 16. Nf4) 16. Bd4 $16 {Serper,G-Lutz,C/Dortmund/1993/0:1 (37) Inf 57/18/}) 4... e4 5. Nd4 d5 6. cxd5 Qxd5 $1 7. Nc2 Qh5 8. h3 (8. Nc3 Bh3 $1) 8... Qg6 9. Nc3 Bc5 10. d4 (10. Ne3 $5 O-O 11. Qc2 Re8) 10... exd3 11. Qxd3 Qxd3 12. exd3 Bf5 $10 13. Ne4 Nbd7 14. O-O O-O-O $6 (14... O-O $5 15. Be3 (15. b4 Bb6) 15... Bxe3 16. Nxe3 Bxe4 (16... Bg6 17. f4) 17. dxe4 Rfe8 18. f3 g6) 15. b4 $1 Bxe4 $6 (15... Bb6 $2 16. Nd6+) (15... Be7 $5 16. Bf4 (16. Ne3 Bxe4 17. dxe4 Bxb4) 16... Nb6 $13) 16. dxe4 Bb6 17. Ne3 Ne5 (17... Rhe8 $6 18. Nf5 { g7/}) 18. Nf5 Ne8 (18... g6 $2 19. Bg5) 19. a4 $16 g6 20. Bb2 f6 21. a5 Bc7 22. Nh6 $6 Rf8 23. a6 (23. f4 $6 Nc4 24. Bc3 Ne3 25. Rf3 Nxg2 26. Kxg2 Nd6 b5/}) 23... Nd3 $6 (23... b6 $5 24. Bxe5 (24. Rac1 Nd3) 24... Bxe5 25. Rac1 Rd6 $13) 24. axb7+ Kxb7 25. Ba3 (25. Bc3 $5 Be5 26. Bxe5 fxe5 27. Ra5 Nc7 28. Ng4 Nb5 29. Rd1 h5 30. Bf1 hxg4 31. Rxd3 Rxd3 32. Bxd3 gxh3 33. Bxb5 $14) 25... Be5 26. Rad1 (26. Rab1 $5 {<<fd1,>>f1/}) 26... Nc7 27. f4 $6 ( 27. Ng4 $5) 27... Bd4+ 28. Kh2 Bb6 29. b5 c5 30. e5+ Kc8 31. Rf3 Nb4 32. Rxd8+ Kxd8 33. exf6 Rxf6 34. Bb2 (34. Bxb4 cxb4 35. Rd3+ Kc8 36. Bc6 Bc5 {<<d6/}) 34... Re6 35. f5 $6 (35. Bf1 $5) 35... gxf5 36. Nxf5 Nxb5 $15 37. Ng7 $6 (37. Re3 $5) 37... Re2 38. Bf6+ Kd7 $6 39. h4 $2 (39. Nh5 f4/}) 39... Nc2 40. Kh3 Rxg2 41. Kxg2 Ne1+ 42. Kf2 Nxf3 43. Kxf3 Nd4+ 44. Ke3 (44. Bxd4 cxd4 45. Ke4 a5 46. Nf5 a4 47. Nxd4 Bxd4 48. Kxd4 h5 $19) 44... a5 45. Kd2 a4 46. Kc1 Kc6 47. g4 c4 48. g5 (48. Kb2 Bc5 {a3,c3/}) 48... a3 49. Kb1 c3 50. h5 c2+ 51. Kc1 a2 {#R} 0-1

[Event "Buenos Aires"] [Site "Buenos Aires"] [Round "0"] [White "Hort, Vlastimil"] [Black "Olafsson, Fridrik"] [Result "1/2-1/2"] [WhiteElo "2395"] [EventType "tourn"] [EventRounds "13"] [EventCountry "ARG"] [ECO "E15"] [Opening "Queen's Indian: 4.g3 Bb7"] 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. d5 exd5 8. Nh4 c6 9. cxd5 Nxd5 (9... cxd5 10. Nc3 Na6 11. Nf5 Nc7 12. Bf4 Ne6 $5 13. Be5 d6 14. Bxf6 Bxf6 15. Nxd5 Rb8 $13 {Panchenko,A-Inkiov,V/Plovdiv/1982/}) 10. Nf5 Nc7 11. Nc3 d5 (11... Ne8 $5 12. Bf4 Na6 13. Qd2 d5 14. e4 Nac7 15. Rad1 Bf6 16. exd5 Nxd5 17. Nxd5 cxd5 18. Ne3 Nc7 19. Bxc7 Qxc7 {Timman,J-Karpov,A/ Tilburg/1983/0,5/}) 12. e4 Bf6 13. Bf4 Nd7 (13... Bc8 $5 14. g4 $1 Nba6 15. Rc1 Bd7 16. Qd2 Nc5 {Kasparov,G-Karpov,A/Moscow (m,2)/1984/0,5 (46)/Inf 38/717/} 17. Bxc7 Qxc7 18. exd5 Bxf5 19. gxf5 Rad8 20. b4 Nb7 21. Ne4) 14. exd5 $6 (14. Rc1 $5) (14. Re1 $5) (14. Bxc7 Qxc7 15. exd5 cxd5 (15... Bxc3 16. d6 $1) 16. Nxd5 Bxd5 17. Bxd5 Rad8 $10) 14... cxd5 (14... Nxd5 $5) 15. Re1 Nc5 16. Bd6 Re8 17. Qg4 g6 (17... Ne4 $4 18. Nh6+ $18) 18. Bxc7 Qxc7 19. Nxd5 Bxd5 20. Bxd5 Rxe1+ 21. Rxe1 Rd8 22. Rd1 (22. Rd1 Bxb2 $5 23. Nh6+ (23. Qg5 Ne6 $1) (23. Qh4 Rd7 $17) 23... Kg7 24. Nf5+ (24. Nxf7 Rxd5 25. Rxd5 Kxf7 $17) (24. Bxf7 Rxd1+ 25. Qxd1 Kxh6 $19) 24... Kh8 $17) {#d} 1/2-1/2

[Event "Buenos Aires"] [Site "Buenos Aires"] [Round "0"] [White "Kavalek, Lubomir"] [Black "Olafsson, Fridrik"] [Result "1-0"] [EventType "tourn"] [EventRounds "13"] [EventCountry "ARG"] [ECO "B42"] [Opening "Sicilian: Kan, 5.Bd3"] 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 g6 6. Nc3 (6. c4 $5) 6... Bg7 7. Be3 Ne7 (7... d6 8. Qd2 Nf6 9. Bh6 Bxh6 10. Qxh6 Bd7 11. O-O-O Qe7 12. Rhe1 $14 {Cseshkovsky,V-Huebner,R/Las Palmas/1976/}) (7... Nc6 8. Nb3 d5 9. exd5 exd5 10. Bc5 b6 11. Ba3 Nge7 12. O-O O-O 13. Re1 Ra7 14. Qe2 $14 {Gipslis, A-Poutiainen,J/Tallinn/1977/}) 8. Qd2 d5 (8... Nbc6 9. Nb3 d5 10. Bh6 O-O 11. Bxg7 Kxg7 12. exd5 Nxd5 13. O-O-O $16 {Kapengut,A-Vitolinsh,A/Minsk/1978/}) 9. exd5 $1 (9. Nb3 dxe4 10. Nxe4 O-O 11. Bh6 Nbc6 12. Bxg7 Kxg7 $10) 9... Nxd5 10. Bg5 Qd6 (10... f6 $6 11. Bh6 (11. Bh4 Nxc3 12. Qxc3 g5 13. Bg3 f5) 11... Bxh6 12. Qxh6 Nxc3 13. Bxg6+ $1 Kd7 14. Qg7+ Kd6 15. bxc3 hxg6 16. O-O-O $40) 11. Nde2 $14 h6 12. Bh4 Nc6 13. Bg3 Qd8 14. Nxd5 $5 Qxd5 15. Nc3 Qd4 (15... Qxg2 16. O-O-O $44) 16. O-O O-O 17. Bf4 Kh7 18. Be3 (18. Rad1 $5) 18... Qh4 $6 ( 18... Qb4 $5) 19. f4 $1 Rd8 (19... b5 20. Rae1 Bb7 21. Ne4 Rad8) 20. Bb6 Rf8 ( 20... Bd4+ 21. Bxd4 Nxd4 22. Ne4 $36) 21. Rae1 f5 (21... e5 $6 22. f5 $36) 22. Bc4 e5 23. Nd5 $1 Be6 (23... exf4 24. Rxf4) 24. g3 Qh3 25. fxe5 Nxe5 26. Rxe5 $1 (26. Nf4 Nxc4) 26... Bxe5 27. Re1 f4 (27... Bxd5 28. Qxd5 Bg7 (28... Bf6 29. Qd7+ Kh8 30. Bd4 $16) 29. Re7 Rg8 30. Qe5 Kh8 31. Rxg7 Rxg7 32. Bd4 $18) (27... Bxg3 28. Rxe6) 28. Rxe5 fxg3 29. Qg2 gxh2+ 30. Kh1 Qxg2+ 31. Kxg2 $16 Rac8 32. Bb3 Rc6 33. Bd4 Rf5 34. Rxf5 gxf5 (34... Bxf5 35. Ne7 $18) 35. c3 Rd6 36. Nf4 ( 36. c4 $6 b5 $1) 36... Bxb3 37. axb3 Rd7 38. Kxh2 Re7 39. b4 Re1 40. Kg3 Rb1 41. Nd3 Kg6 42. Nc5 Rxb2 43. Nxb7 Ra2 (43... h5 $5) 44. c4 Ra3+ 45. Kf4 Rb3 ( 45... h5 46. c5 Rb3 (46... h4 47. c6 h3 48. c7 h2 49. c8=Q h1=Q 50. Qg8+ $18) 47. c6 Rxb4 48. Ke5 Rc4 49. Nc5) 46. b5 $1 axb5 47. c5 $18 Rb4 48. Ke5 Rc4 49. Nd6 Rc1 50. Nxb5 Kf7 51. Kd6 $1 f4 52. c6 f3 53. c7 h5 54. Nc3 $1 Rxc3 55. Bxc3 f2 56. c8=Q f1=Q (56... f1=Q 57. Qe6+ Kf8 58. Qe7+ Kg8 59. Qg7#) 1-0

[Event "Buenos Aires"] [Site "Buenos Aires"] [Round "0"] [White "Olafsson, Fridrik"] [Black "Browne, Walter S"] [Result "1/2-1/2"] [BlackElo "2540"] [EventType "tourn"] [EventRounds "13"] [EventCountry "ARG"] [ECO "A05"] [Opening "Reti: 1...Nf6"] 1. Nf3 Nf6 2. c4 c5 3. Nc3 e6 4. e3 Nc6 5. d4 d5 6. a3 a6 7. dxc5 (7. cxd5 exd5 8. Be2) 7... Bxc5 8. b4 Ba7 9. Bb2 O-O 10. Qc2 Qe7 11. Be2 d4 (11... dxc4 12. Bxc4 b5 13. Bd3 Bb7 14. O-O Rac8 15. Qe2 $10 {Benko,P-Lombardy,W/USA/1969/}) 12. exd4 Nxd4 13. Nxd4 Bxd4 14. O-O e5 15. Rad1 a5 (15... Be6 $5) 16. Qb3 (16. c5 axb4 17. axb4 Be6 18. Bf3 {P fe1}) (16. Nb5 $5 Bxb2 17. Qxb2 axb4 18. axb4 Bd7) 16... Bd7 (16... Be6 17. Nb5 $1 Bxb2 18. Qxb2 axb4 19. axb4 Bd7 20. Nd6 $14) 17. Rfe1 axb4 18. axb4 Rfc8 19. Bf3 Be6 20. Nd5 Bxd5 (20... Nxd5 21. cxd5 Bxb2 22. Qxb2 Bd7 23. d6 $16) 21. cxd5 (21. Bxd4 Bxf3 22. Qxf3 Qxb4 23. Bxe5 Ra6) 21... Bxb2 22. Qxb2 Qd6 (22... e4 23. d6 $1 (23. Rd4 Re8 24. d6 Qd7 25. Bxe4 Nxe4 26. Rdxe4 Rxe4 27. Rxe4 Qxd6 $10) 23... Qe6 24. Rd4 Re8 (24... Ra2 25. Qb1) 25. Bxe4 Nxe4 26. d7 Red8 27. Rexe4 Qc6 28. Re7 $16) 23. Qxe5 (23. Rxe5 $6 Ra4 24. Rb1 (24. b5 Rb4) 24... Rxb4 $1 25. Qxb4 Qxb4 26. Rxb4 Rc1+ $19) 23... Qxb4 24. Rb1 (24. d6 Re8 25. Qxe8+ Nxe8 (25... Rxe8 $2 26. Rxe8+ Nxe8 27. d7 $18) 26. d7 Nd6 27. Bxb7 (27. Rxd6 $4 Qxe1#) 27... Rd8) 24... Qc5 25. Red1 Rc7 26. h3 Rd8 27. Qf4 Qd6 28. Qd4 {P b6} Nd7 $1 29. Rb5 Nc5 (29... h6 $5) 30. Rdb1 Qe7 31. Kf1 (31. Rb6 Rd6) 31... Kf8 32. Rb6 Rd6 33. R6b2 Qf6 34. Qe3 (34. Qxf6 Rxf6 35. d6 Rxd6 36. Bxb7 $10) 34... h6 35. Re2 Rd8 36. Ree1 Na4 37. Qa3+ Nc5 38. Qa5 (38. Qe3) 38... Qa6+ $1 39. Qxa6 bxa6 40. Rb6 a5 41. Rc1 Nd7 (41... Nd7 42. Rxc7 Nxb6 43. Ra7 Nxd5 44. Rxa5 $10) 1/2-1/2

[Event "Buenos Aires"] [Site "Buenos Aires"] [Round "0"] [White "Olafsson, Fridrik"] [Black "Karpov, Anatoly"] [Result "1-0"] [EventType "tourn"] [EventRounds "13"] [EventCountry "ARG"] [ECO "E00"] [Opening "Catalan: 3...c5 4.Nf3"] 1. d4 Nf6 2. c4 e6 3. g3 c5 4. Nf3 (4. d5 $5) 4... cxd4 5. Nxd4 Qc7 6. Qd3 (6. Nc3 $5 a6 7. Bg2 Be7 8. Qd3 O-O 9. O-O Nc6 10. b3 b6 11. Bb2 Bb7 12. e4 Rfd8 13. Rac1 $14 {Bertok,M-Ljubojevic,L/YUG/1973/}) 6... a6 (6... e5 7. Nb5 Qc6 8. e4 Nxe4 9. Bg2 Nc5 10. Qd5 Qxd5 11. cxd5 $44 {Brandford-Peters/USA/1978/ Inf 26/68/}) 7. Bg2 Nc6 8. Nxc6 (8. b3 $5) 8... dxc6 $5 (8... bxc6 $5) 9. O-O Be7 10. Qb3 (10. Nc3 $5 O-O 11. Be3) 10... e5 11. Be3 Nd7 (11... Bg4 $5 12. Bb6 Qc8 d7/}) 12. Nc3 Nc5 13. Qc2 Bg4 (13... a5 14. a3 a4 $140 15. Bxc5 Bxc5 16. Nxa4) 14. b4 Nd7 15. b5 O-O 16. bxc6 bxc6 17. Rab1 Be6 (17... Rfb8 18. Qa4 (18. Rb3)) 18. Qa4 Rfc8 $10 19. Rfc1 (19. Ne4 $5) 19... Nc5 20. Qc2 g6 (20... Bxc4 $2 21. Nd1) 21. Ne4 Bf5 22. Bxc5 $6 (22. g4 $1 $14) 22... Bxc5 23. Rb3 $6 (23. g4 $1 Bxe4 24. Qxe4) 23... Be7 $15 24. Rcb1 Rab8 25. h4 a5 26. Kh2 Rb4 27. a3 Rxb3 28. Qxb3 Rd8 29. e3 Qd7 30. Qc3 Qc7 (30... Bxe4 $5 31. Bxe4 Qd2 $15) 31. Rb2 Rd1 $6 (31... a4 $5) 32. c5 $1 Be6 (32... Rd5 33. Nd6 Bxd6 34. cxd6 (34. Bxd5 $2 cxd5) 34... Rxd6 35. Qxe5 $16) (32... a4 33. Rb6 Rd5 34. Nd6 Bxd6 35. Bxd5 cxd5 36. Rxd6 $18) 33. Rb6 Bd5 34. Qxa5 $16 Qd7 35. Qa8+ Kg7 36. Rb7 Qe6 ( 36... Qf5 37. Qa4 $18) 37. Qe8 Bxe4 (37... Bf8 38. Qxe6 Bxe6 39. Ng5 $18) ( 37... Bf6 38. Nd6 $1 $18) 38. Bxe4 $18 Qf6 39. Qxe7 Qxf2+ 40. Bg2 (40. Bg2 Qg1+ (40... Rg1 41. Qxf7+ $18) (40... Rd2 41. Qxe5+ $18) 41. Kh3 $18) {#r} 1-0

[Event "Buenos Aires"] [Site "Buenos Aires"] [Round "0"] [White "Olafsson, Fridrik"] [Black "Larsen, Bent"] [Result "0-1"] [EventType "tourn"] [EventRounds "13"] [EventCountry "ARG"] [ECO "A10"] [Opening "English: 1...g6"] 1. c4 g6 2. d4 Bg7 3. Nf3 c5 4. e4 Nc6 (4... Qa5+ $5 5. Nc3 d6 6. d5 Bxc3+ 7. bxc3 Nf6 8. Qc2 Nxe4 9. Bd3 Nf6 10. O-O O-O 11. Nh4 $5 Nbd7 12. f4 b5 $1 13. cxb5 c4 14. Bxc4 Bb7 $17 {Tal,M-Chekhov,V/URS/1991/}) 5. dxc5 Qa5+ 6. Nfd2 (6. Bd2 Qxc5 7. Nc3 d6 8. Be2 Nf6 9. O-O O-O 10. h3 Bd7 11. Na4 $18 {Chekhov, V-Razuvaev,Y/URS/1982/1:0 (11)/}) 6... Qxc5 7. Nb3 Qb6 8. Be2 d6 9. O-O Be6 10. Be3 Qc7 11. Qd2 Nf6 12. f3 O-O 13. Nc3 $14 Rfc8 14. Nd5 (14. Rac1 $5) 14... Qd8 15. Rac1 Nd7 16. f4 (16. Rfd1 $5) 16... a5 17. Kh1 (17. f5 gxf5 18. exf5 Bxd5 19. cxd5 Nce5 20. Bh6 a4 21. Qg5 Qf8) 17... a4 18. Nd4 Nc5 19. Bf3 Bxd5 20. cxd5 (20. exd5 $5) 20... Nxd4 21. Bxd4 Qa5 22. Qxa5 (22. Qe3 Qb4 23. Bxg7 Kxg7 24. Rf2 $140 Nxe4 $1) 22... Rxa5 23. e5 (23. Bxg7 Kxg7 24. Rfd1 Rb5 25. Rc2 Rb4 26. Re2 {P g1-f2-e3}) 23... b6 24. Be2 (24. Rfd1 $5) 24... f5 (24... Raa8 25. Bb5 {P c6}) 25. Rfd1 (25. g3 {P g2-f3}) 25... Bh6 26. g3 Raa8 27. Bb5 dxe5 28. Bxe5 Bg7 (28... Rd8 29. d6 exd6 30. Rxd6 Rxd6 31. Bxd6 $16) 29. d6 Bxe5 30. fxe5 Kf8 $1 31. g4 $1 exd6 (31... fxg4 $4 32. Rf1+ Kg7 33. dxe7 $18) 32. exd6 Ra5 (32... f4 33. d7 Rd8 34. Rd6 {P b6, P f6}) (32... fxg4 33. Rd4 h5 34. d7 Rd8 35. Rd6) 33. Be2 Ra7 34. gxf5 gxf5 35. Bb5 Rd8 (35... Ra5 $2 36. Bd7 $1 Rd8 37. Bxf5) 36. Rd5 f4 37. Rf1 $6 (37. Rf5+ Rf7 38. Rxf7+ Kxf7 39. Rf1 Rxd6 40. Rxf4+ Kg7 41. Kg2 (41. Bxa4 Nxa4 42. Rxa4 Rd1+ 43. Kg2 Rd2+ $10) 41... Rd2+ 42. Rf2 Rd1 $10) (37. Kg2 $1 $16) 37... Rf7 38. Bc4 $6 (38. Kg2 $1 Rf6 39. d7 Ke7 40. Kf3) 38... Rf6 39. Rg5 (39. Rfd1 Ne4 {P f2} 40. R1d4 Nxd6) 39... Rdxd6 40. Rg8+ Ke7 41. Rg7+ Kd8 42. Rxh7 Ne4 43. Bb5 (43. Rh4 Rd2 44. Rhxf4 (44. Rfxf4 Nf2+) 44... Nf2+) 43... Rd4 (43... f3 $5) 44. Rg1 Rf8 45. Ra7 f3 $1 $17 46. h3 (46. Ra8+ Ke7 47. Rg7+ Ke6 $1 48. Rxf8 $140 Rd1+ 49. Rg1 Nf2#) 46... f2 47. Rc1 (47. Ra8+ Ke7 48. Rg7+ Kf6 49. Rxf8+ Kxg7 50. Rf3 Rb4 51. Bd3 Nc5 $17 {P b2}) 47... Rf5 48. Bf1 Nd2 49. Kg2 $6 (49. Rd1 $5 Rg5 50. Bg2) 49... Rg5+ $1 50. Kxf2 (50. Kh2 Nf3+ 51. Kh1 Rg1#) 50... Rf4+ 51. Ke3 Rxf1 52. Rc3 (52. Kxd2 Rd5+ $19) (52. Rcc7 Rf3+ $1 (52... Rd5 53. Rh7) 53. Kxd2 Rg2+ 54. Ke1 Rxh3 55. Rd7+ Ke8 56. Re7+ Kf8 57. Rf7+ Kg8 58. Rf2 Rxf2 59. Kxf2 b5 60. b3 $1) 52... Rd5 53. Rxa4 b5 54. Rg4 Nc4+ (54... Rf3+ 55. Ke2 Rxc3 56. bxc3 Nc4 57. a4 $1) 55. Ke2 Rf7 56. Rg8+ Kd7 (56... Kd7 57. b3 (57. a4 Rd2+ 58. Ke1 Re7+ 59. Kf1 Ne3+ 60. Kg1 bxa4 $19) 57... Rd2+ 58. Ke1 Re7+ 59. Kf1 Ne3+ 60. Kg1 Rxa2 $19) 0-1

[Event "Buenos Aires"] [Site "Buenos Aires"] [Round "0"] [White "Olafsson, Fridrik"] [Black "Ljubojevic, Ljubomir"] [Result "1/2-1/2"] [BlackElo "2590"] [EventType "tourn"] [EventRounds "13"] [EventCountry "ARG"] [ECO "A04"] [Opening "Reti: 1...c5"] 1. Nf3 c5 2. c4 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. d4 Nxc3 6. bxc3 g6 7. h4 $6 (7. e4) 7... Bg7 8. h5 cxd4 9. cxd4 Nc6 10. e3 e5 $1 $10 11. h6 (11. hxg6 hxg6 12. Rxh8+ Bxh8 13. dxe5 Qxd1+ 14. Kxd1 Nxe5 15. Bb2 Bg4 16. Bb5+ Ke7 17. Ke2) 11... Bf6 12. dxe5 (12. d5 $2 e4) 12... Qxd1+ 13. Kxd1 Nxe5 14. Bb2 Bg4 15. Bb5+ (15. Be2 O-O-O+ 16. Kc2 Bf5+ 17. Kb3 Be6+) 15... Ke7 16. Ke2 a6 (16... Rac8 $5) 17. Ba4 Nc4 18. Bxf6+ Kxf6 19. Bb3 Rac8 20. Rad1 (20. Rac1 Ne5 21. Rhd1) 20... Na5 (20... Ne5 $5) 21. Rh4 Nxb3 (21... Bxf3+ 22. Kxf3 Nxb3 23. axb3 Rhd8 24. Rf4+ Ke7 25. Re4+ Kf8 26. Rxd8+ Rxd8 27. Rc4 {/\ Rc7}) (21... Nxb3 22. Rxg4 (22. axb3 $5) 22... Nc5 $1 (22... Nc1+ 23. Ke1 Nxa2 24. Rd7 Rc1+ 25. Kd2 Rhc8 26. Rf4+ Ke6 27. Rfxf7 {/\ Ng5}) 23. Rf4+ Ke7 24. Rfd4 Rc7 $13) {#d} 1/2-1/2

[Event "Buenos Aires"] [Site "Buenos Aires"] [Round "0"] [White "Olafsson, Fridrik"] [Black "Najdorf, Miguel"] [Result "1/2-1/2"] [EventType "tourn"] [EventRounds "13"] [EventCountry "ARG"] [ECO "A15"] [Opening "English: Anglo-Indian, 2.g3 g6"] 1. c4 Nf6 2. g3 g6 3. Bg2 Bg7 4. Nf3 O-O 5. O-O d6 6. d4 Nbd7 7. Qc2 e5 8. Rd1 Re8 9. e4 c6 10. Nc3 a5 (10... exd4 11. Nxd4 Qe7 12. b3 Nc5 13. Bb2 (13. f3 Nfd7 14. Rb1 Ne5 15. Nce2 a5 16. a3 h5 $13 {Salov,V-Kasparov,G/Linares/1991/ Inf 51/(577)/}) 13... a5 14. Rd2 h5 15. Na4 $1 Nxa4 16. bxa4 Nd7 $14 {Salov, V-Hjartarson,J/Amsterdam/1991/0,5 (39) Inf 51/577/}) 11. h3 (11. b3 $5 Qe7 12. Rb1 h5 {Zaichik,G-Kochyev,A/URS/1975/} 13. Ba3 $14 (13. h3 $14)) 11... a4 12. Rb1 (12. Nxa4 $2 Nxe4) 12... Qa5 (12... exd4 13. Nxd4 Nc5 14. Bf4 $14 {Larsen, B-Matulovic,A/Zagreb/1955/}) 13. b4 $1 axb3 14. axb3 exd4 15. Nxd4 Qc7 16. Bf4 Bf8 $6 (16... Nh5 17. Ndb5 cxb5 18. Nxb5 Qd8 (18... Qa5 19. Bxd6 $36) 19. Bxd6 $36) (16... Ne5 $5) 17. Rd2 (17. g4 $5 Ne5 18. Bg3 {/\ f4}) 17... Nh5 18. Be3 Ng7 19. f4 $6 (19. Re1 $5) 19... f5 $1 20. Bf2 Nf6 21. Re2 fxe4 22. Nxe4 Nxe4 23. Rxe4 Rxe4 24. Qxe4 Bd7 (24... Bd7 25. g4 Re8 26. Qf3 $14) {#d} 1/2-1/2

[Event "Buenos Aires"] [Site "Buenos Aires"] [Round "0"] [White "Olafsson, Fridrik"] [Black "Panno, Oscar"] [Result "1-0"] [BlackElo "2540"] [EventType "tourn"] [EventRounds "13"] [EventCountry "ARG"] [ECO "B40"] [Opening "Sicilian: Open, 2...e6, 4.Nxd4"] 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 Nxd4 (10... Qc7 $5 11. Qg3 Nxd4 12. Bxd4 b5 13. a3 Bb7 14. Rae1 Bc6 15. Kh1 Qb7 16. Bd3 b4 17. axb4 Qxb4 18. Ne2 Qb7 19. e5 Nh5 20. Qh3 g6 $132 {Shirov,A-Ivanchuk,V/Linares/1993/0,5 (35) Inf 57/238/}) 11. Bxd4 b5 12. Rd1 (12. a3 Bb7 13. Qg3 Qc7 14. Rae1 Rad8 15. Kh1 Bc6 16. e5 $5 dxe5 17. Bxe5 Qb7 18. f5 exf5 19. Rxf5 Ne8 $13 {Orlov,V-Ionov,S/RUS/1992/}) 12... Bb7 ( 12... Qc7 13. e5 dxe5 14. fxe5 Nd7 15. Ne4 Bb7 16. Nf6+ Kh8 17. Bd3 $1 $36 { Ivanov,A-Magerramov,E/URS/1980/}) 13. Bf3 Qc7 14. e5 dxe5 15. fxe5 Nd7 16. Bxb7 Qxb7 17. Ne4 Qc7 18. Nf6+ (18. Rd3 Nxe5 $1 19. Qg3 f6 20. Rc3 Qd7 $17) (18. Qg3 Kh8 19. Nd6 Kg8 20. Rxf7 Rxf7 21. Nxf7 Qxc2 $10) 18... Kh8 19. Nxd7 Qxd7 20. Rd3 Rac8 21. c3 b4 $1 $132 22. Rh3 (22. cxb4 Rc4) 22... bxc3 23. bxc3 (23. Bxc3 Qd5 24. a3 Rc4) 23... Qb7 (23... Qd5 $5) 24. Qe3 (24. Qe2 $5) 24... Qb2 25. a4 (25. Qd3 h6 26. a4 $5 (26. Qxa6 Ra8 {P a2})) 25... Qc2 $1 26. a5 Rcd8 27. Rf2 Qg6 $6 (27... Qb1+ 28. Rf1 Qc2 $10) 28. Qe2 $1 Rd5 (28... Ra8 29. Rf1 {P g3-/+ }) 29. Qxa6 Bd8 (29... Qb1+ 30. Rf1 Qa2 31. Qd3 {P a6}) 30. Rg3 Qb1+ $6 (30... Qe4 $5 31. Qxe6 $140 $2 Qe1+ 32. Rf1 Qxf1+ $19) 31. Rf1 Qa2 32. Qxe6 $18 Rxa5 ( 32... Qxa5 33. Rxf7 Qa1+ 34. Kf2 Qa2+ 35. Kf3 $18) 33. Qd6 Rg8 34. e6 f6 (34... Qxe6 35. Bxg7+ Rxg7 36. Qf8+ $18) 35. e7 Bxe7 36. Qxe7 Ra6 37. h3 Qd5 38. Kh2 Re6 39. Qf7 Qd6 40. Rff3 Re7 41. Qh5 {#r} 1-0

[Event "Buenos Aires"] [Site "Buenos Aires"] [Round "0"] [White "Olafsson, Fridrik"] [Black "Quinteros, Miguel Angel"] [Result "1/2-1/2"] [BlackElo "2515"] [EventType "tourn"] [EventRounds "13"] [EventCountry "ARG"] [ECO "B90"] [Opening "Sicilian: Najdorf"] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. O-O O-O 9. Bg5 (9. Be3 $5) 9... Be6 10. f4 (10. Bxf6 Bxf6 11. Qd3 Nc6 12. Nd5 Bg5 13. Rfd1 Rc8 $10) 10... exf4 11. Bxf4 Nc6 12. Kh1 Rc8 13. Qe1 Nd7 (13... Ne8 $5 14. Rd1 Bh4 15. Qd2 Bf6 16. Qe3 Ne5 17. Nd4 Qb6 18. Na4 {Unzicker,W-De Firmian, N/Baden-Baden/1981/1:0 (41) Inf 32/351/} Qa7 $5 19. Nxe6 Qxe3 20. Bxe3 fxe6 21. c3 Nc4 22. Nb6 $10 {Unzicker}) 14. Rd1 Nde5 15. Qg3 (15. Nd5 Bg5 16. Bg3 Kh8 ( 16... b5 $1 $13) 17. c3 b5 18. h3 $14 {Zaichik,G-Psakhis,L/URS/1980/0:1 (34) Inf 29/385/}) 15... Bh4 16. Qe3 Bf6 17. a3 (17. Nd5 $5 Bxd5 18. exd5 Ne7 19. c3 N7g6 $13) 17... Re8 18. Qf2 Qc7 19. Qg3 Kh8 20. Rd2 Rcd8 21. Bg5 $6 (21. Rfd1 $5) (21. h3 $5) 21... Bxg5 22. Qxg5 Qb6 (22... b5 $5) 23. Na4 (23. Rfd1 $5) 23... Qa7 24. Nc3 (24. Rfd1 b5 25. Nc3 Qb8) 24... b5 25. Rfd1 Qb8 26. Nd4 Nxd4 27. Rxd4 Bc4 28. b3 (28. Qd2 $5) 28... Be6 29. Nd5 (29. a4 Qc7) 29... Bxd5 ( 29... Rc8 $5) 30. Rxd5 Rc8 31. Rxd6 (31. Qd2 Qc7 32. Rxd6 Qxc2 33. Qxc2 Rxc2 34. Bf1 Rc3) 31... Rxc2 32. Bf1 f6 33. Qh5 Rc6 34. R6d5 (34. Qxe8+ Qxe8 35. Rd8 Rc8 36. Rxe8+ Rxe8 37. Rd6 Ra8 {/\ Kg8-f7}) 34... Rce6 35. a4 bxa4 36. bxa4 h6 (36... Ng6 $5 37. R5d4 (37. Qf3 $5 Rxe4 $140 38. Qxe4 Rxe4 39. Rd8+ Re8 40. Rxb8 Rxb8 41. Bxa6) 37... Rxe4 38. Rxe4 Rxe4 39. Bd3 Rh4) 37. h3 Rc8 38. Qf5 ( 38. a5 $5) 38... Rec6 39. a5 Qc7 40. Be2 Ra8 41. Qf4 (41. Qf1 $5) 41... Rc5 42. Qd2 Rc2 (42... Rxd5 43. exd5 $16) 43. Qe1 Rc6 $10 44. Qf1 Qe7 45. Rc1 Qc7 46. Rxc6 Qxc6 47. Qd1 (47. Qb1 $5 {/\ Qb6}) 47... Kh7 48. Qf1 Ra7 49. Qf5+ g6 50. Qf2 Rc7 (50... Rc7 51. Qb6 Nc4 52. Bxc4 (52. Qxc6 Rxc6 53. Bxc4 Rxc4 54. Rd7+ Kg8 55. Rd6 Kf7 $1 56. Rxa6 Rxe4 $10) 52... Qxc4 53. Qxf6 Qxe4 $10) {#d} 1/2-1/2

[Event "Buenos Aires"] [Site "Buenos Aires"] [Round "0"] [White "Timman, Jan H"] [Black "Olafsson, Fridrik"] [Result "1-0"] [EventType "tourn"] [EventRounds "13"] [EventCountry "ARG"] [ECO "D85"] [Opening "Gruenfeld: Exchange, 5.e4"] 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 Nc6 8. Ne2 Qd7 $6 (8... O-O 9. Bd3 $5 b6 10. Bg5 Qd7 11. O-O Bb7 12. Qd2 e5 13. d5 Na5 14. c4 c6 $5 15. Rac1 Rac8 16. Be3 f5 $132 {Polgar,Z-Hort,V/Munchen/1991/0,5 (31) Inf 51/469/}) 9. Bb5 $1 O-O (9... a6 10. Ba4 (10. Qa4 $5 Rb8 11. Bxc6 bxc6 12. Ba3) 10... b5 11. Bc2 Bb7 $13) 10. d5 a6 11. Ba4 (11. dxc6 Qxd1+ 12. Kxd1 axb5 $17) 11... Qg4 12. O-O (12. dxc6 $5 Qxg2 13. Ng3 (13. Rg1 Qxe4 14. Be3 b5 15. Bb3 Qxc6 16. Bd5 Bxc3+ 17. Nxc3 Qxc3+ 18. Ke2 Rb8 19. Rc1 Qb4 20. Rxc7 $16) 13... Bxc3+ 14. Bd2 Bxa1 15. Qxa1 Rd8 16. Bh6 f6 17. e5 $1 $36) 12... Ne5 13. f4 Bd7 $1 14. Bxd7 (14. Bb3 Bb5 $1 $36) 14... Nxd7 15. h3 Qh4 16. Be3 Rfd8 17. Bf2 (17. Rb1 $5) 17... Qh5 18. Rb1 c6 19. c4 (19. Rxb7 cxd5 20. exd5 Rac8 $44) 19... b5 20. cxb5 axb5 $2 (20... cxb5) (20... cxd5 21. b6 $1 dxe4 22. b7 Rab8 23. Ba7) 21. dxc6 Ne5 22. Nd4 $1 (22. Qc2 Nxc6 23. Ng3 Nd4 $1) 22... Nc4 (22... Qxd1 23. Rfxd1 Nc4 24. Nxb5 $18) 23. Qxh5 gxh5 24. Nf5 Bf8 (24... Nd2 25. Nxe7+ Kf8 26. c7 $18) 25. Rxb5 $18 e6 26. Ng3 h4 27. Nh5 Be7 28. Rb7 Re8 29. Rc1 Nd6 30. Rxe7 Rxe7 31. Bc5 Nc8 (31... Rd8 32. Bxd6 Rxd6 33. c7) 32. Bxe7 Nxe7 33. c7 f5 34. Rd1 Kf7 35. Rd8 (35. exf5 $5 exf5 36. Rd8) 35... Rxa2 36. c8=Q Nxc8 37. Rxc8 Ra1+ (37... fxe4 38. Rc4 e3 39. Re4 e2 40. g4 $18) 38. Kf2 Ra2+ 39. Ke3 Ra3+ (39... Rxg2 40. Rc7+ $18) 40. Kd4 Kg6 41. g4 {#r} 1-0