[Event "Zuerich"] [Site "Zuerich"] [Round "0"] [White "Dueckstein, Andreas"] [Black "Olafsson, Fridrik"] [Result "0-1"] [EventRounds "15"] [EventCountry "SUI"] [ECO "B43"] [Opening "Sicilian: Kan, 5.Nc3"] 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Nc3 Qc7 6.g3 Nc6 7.Bg2 Nf6 8.O-O Be7 9.b3 (9.Be3 $142) 9...O-O 10.Bb2 Rd8 11.h3 (11.Nce2) 11...Rb8 (11...b5?! 12.e5) 12.g4 b5 13.Nxc6 dxc6 14.Qf3 c5 15.g5 Nd7 16.Qg4 c4 17.Ne2 Bb7 18.f4 cxb3 19.cxb3 Nc5 20.f5 Nd3 21.Bf6 exf5! 22.exf5 (22.Rxf5 Bc8) 22...Bxf6 23.gxf6 Qb6+ 24.Kh2 Qxf6 25.Ng3 Bxg2 26.Nh5 Qe5+ 27.Kxg2 Rbc8 28.Qg3 Qe2+ {#R} 0-1

[Event "Zuerich"] [Site "Zuerich"] [Round "0"] [White "Gligoric, Svetozar"] [Black "Olafsson, Fridrik"] [Result "1-0"] [WhiteElo "2420"] [EventRounds "15"] [EventCountry "SUI"] [ECO "D17"] [Opening "Slav: Czech Defence"] 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bxc4 Bb4 8. O-O Nbd7 9. Qe2 Bg6 10. e4 O-O (10... Bxc3 11. bxc3 Bxe4 (11... Nxe4 12. Ba3 Nxc3 13. Qb2 $44) 12. Ba3 $40) 11. Bd3 Re8 12. Bf4 Nf8 (12... Bh5 $142) 13. h3 Bh5 ( 13... Qa5 $142) 14. g4 Bg6 15. Rad1 N6d7 (15... Qa5 $142) 16. Bg3 f6 17. Bc4 Qe7 18. Ne1 Nb6 19. Bb3 Bf7 20. Nc2 $6 (20. Nd3 Rad8 21. Qe3 $16) 20... Bxc3 21. bxc3 e5 22. Bxf7+ Qxf7 23. a5 Na4 $6 (23... Nc4) 24. Rd3 Nb2 25. Rf3 Qc4 26. Qd2 Ne6 $2 $138 (26... Qf7) 27. h4 $2 $138 (27. Ne3 $1 $18 Qa2 (27... Qb3 28. Rb1 Nc4 29. Qd3) (27... Ng5 28. Rf5 Qa2 29. Nd1 g6 30. Rxg5) (27... Qb5 28. Rb1 Nc4 29. Qa2 (29. Qd3 Nd2 $1)) 28. Nd1) 27... Qb5 (27... Na4 $142) (27... Rad8 28. Ne3 Qb3 29. Rb1 Nc4 30. Qd3 Rxd4 $1) 28. Ne3 Nc4 29. Qa2 Nxe3 (29... Nxa5 30. Rb1 Qa6 31. dxe5 $16) 30. Rxe3 exd4 31. cxd4 Kh8 32. Rb1 Qa6 33. d5 cxd5 (33... Nc5 $142) 34. Qxd5 Rad8 (34... b6 35. axb6 axb6 36. Reb3 $18) 35. Qxb7 Qxa5 36. e5 $1 Nc5 37. Qf7 Rf8 (37... fxe5 38. Bxe5 Rg8 39. Bxg7+ $1 Rxg7 40. Re8+ Rxe8 41. Qxe8+ Rg8 42. Qe5+ Rg7 43. Rb8+ Qd8 44. Rxd8#) 38. Qc4 f5 39. e6 $1 Rde8 40. Re5 Rxe6 41. Rxc5 1-0

[Event "Zuerich"] [Site "Zuerich"] [Round "0"] [White "Keres, Paul"] [Black "Olafsson, Fridrik"] [Result "1/2-1/2"] [EventRounds "15"] [EventCountry "SUI"] [ECO "B90"] [Opening "Sicilian: Najdorf"] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 h6 (7... Qb6 8. Nb3 Qe3+ 9. Qe2 $14) 8. Bh4 Qb6 9. Qd3 Qxb2 10. Rb1 Qa3 11. e5 Nd5 $1 ( 11... dxe5 $2 12. fxe5 Nfd7 13. Nxe6 $1) 12. Nxd5 Qxd3 13. Bxd3 exd5 14. Kd2 dxe5 15. fxe5 Bc5 (15... Nc6) (15... Be7) 16. Nf5 Nc6 $2 (16... Bxf5 17. Bxf5 b5 18. e6 g6 $44) 17. Nxg7+ Kf8 18. Nh5 $16 Bd4 (18... Nxe5 19. Bf6 Rg8 20. Bxe5 Rg5 21. Bg7+ $1) (18... Rg8 19. Bg3) 19. e6 $1 $18 Rg8 $1 (19... Bxe6 20. Rxb7) (19... fxe6 20. Bg6 $1 $40 (20. c3 $40)) 20. g3 fxe6 21. Bh7 (21. c3 $142 Be5 22. Bh7) 21... Rg4 22. Rhf1+ Ke8 23. h3 $2 (23. Bf6 $1) (23. Nf6+ Bxf6 24. Bxf6 $16) 23... Rxh4 24. gxh4 b5 25. Rbe1 $2 (25. c3) 25... b4 26. Kd1 Ke7 27. Bf5 Bc3 28. Re3 Nd4 $6 (28... Ne5 $1) 29. Bg6 Bd7 30. Rf4 $1 (30. Rf7+ Kd6 31. Nf6 Ba4) 30... Nc6 (30... Rg8 $2 31. Rf7+ Kd6 32. Rxd7+ $1 $18) 31. Ng3 $2 (31. Rf7+ Kd6 32. Nf6 Ne5 33. Rxe5 $1) 31... Kd6 32. h5 Ne5 33. Ne2 Nc4 34. Ref3 Be5 35. Rf8 Ra7 36. R3f7 a5 37. Rh7 a4 $1 38. Nc1 (38. Be8 b3 $1) 38... Bc3 39. Rd8 (39. Be8 $2 Bxe8 $1 40. Rxa7 Bxh5+ 41. Ne2 Ne3+ $19) (39. Rxh6 $2 Bg7) 39... Bf6 40. Rb8 Bg5 41. Rxb4 Rc7 $1 (41... e5 42. Ne2 $1 $16) 42. Nd3 e5 (42... Ne3+ 43. Ke2 Nxc2 $1 (43... Rxc2+ 44. Kf3) 44. Rb6+ Bc6 45. Rxc7 Nd4+ 46. Kf2 Kxc7 47. Rb4 $44) 43. Ke2 e4 44. Nf2 Ne5 45. Rb6+ Kc5 46. Rb2 Rc8 $1 47. Bxe4 dxe4 48. Nxe4+ Kd5 49. Nxg5 hxg5 50. Rg7 a3 51. c4+ $1 Rxc4 52. Rd2+ Ke6 53. Rxg5 Bb5 54. Kf2 Rf4+ 55. Ke3 Rh4 56. Rdg2 Rxh3+ 57. R2g3 Rh4 58. Rxe5+ {#d} 1/2-1/2

[Event "Zuerich"] [Site "Zuerich"] [Round "0"] [White "Kupper, Josef"] [Black "Olafsson, Fridrik"] [Result "1-0"] [EventRounds "15"] [EventCountry "SUI"] [ECO "B90"] [Opening "Sicilian: Najdorf"] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f4 e5 7. Nf3 Qc7 8. Bd3 Nbd7 9. a4 b6 10. O-O Bb7 11. Qe1 g6 (11... Be7 $142) 12. Qh4 Bg7 13. fxe5 dxe5 14. Bh6 O-O 15. Ng5 Nh5 $2 (15... Rae8 16. Be2 $1) 16. Bxg7 Kxg7 17. Rxf7+ Kg8 (17... Rxf7 18. Ne6+) 18. Rg7+ Kh8 19. Rxh7+ Kg8 20. Rg7+ {#r} 1-0

[Event "Zuerich"] [Site "Zuerich"] [Round "0"] [White "Olafsson, Fridrik"] [Black "Barcza, Gedeon"] [Result "1-0"] [BlackElo "2440"] [EventRounds "15"] [EventCountry "SUI"] [ECO "A04"] [Opening "Reti"] 1. Nf3 c6 2. g3 d6 3. d4 Bg4 4. Bg2 Nd7 5. O-O Ngf6 6. Nbd2 d5 7. b3 e6 8. Bb2 Be7 9. Ne5 Nxe5 10. dxe5 Nd7 11. Qe1 Qa5 12. a3 O-O 13. h3 Bf5 14. Qc1 f6 15. exf6 Bxf6 16. c4 d4 17. b4 Qc7 18. c5 e5 19. Nc4 Be6 20. e3 $16 Kh8 21. Nd6 Bg5 22. f4 exf4 23. gxf4 Be7 24. Bxd4 Bxd6 25. cxd6 Qxd6 26. Qc3 $18 Qe7 27. e4 b6 28. f5 c5 29. bxc5 bxc5 30. Be3 Bg8 31. e5 Nxe5 32. Bxc5 Qc7 33. Bd4 $18 (33. Bxf8) 33... Qxc3 34. Bxc3 Rae8 35. Rae1 Nf7 (35... Nd7 36. Bc6) 36. f6 g6 37. Re7 Rc8 38. Ba1 a5 39. Bd5 h5 40. Rfe1 Kh7 41. Ra7 Rc5 42. Rd7 Kh6 43. h4 g5 44. Bd4 Rcc8 45. Ree7 Rcd8 46. Be3 Rxd7 47. Rxd7 Kg6 48. hxg5 Kf5 49. Bc5 Ne5 50. Rg7 Bxd5 51. Bxf8 Nf3+ 52. Kf1 Bc4+ 53. Kf2 Nxg5 54. Ra7 Ne4+ 55. Ke3 Nxf6 56. Rxa5+ Ke6 57. Kd4 Bf1 58. Re5+ Kf7 59. Be7 Nd7 60. Rf5+ Kxe7 61. Rxf1 Kd6 62. Rf5 Kc6 63. Rxh5 Nb6 64. Kc3 Nd5+ 65. Kc4 Nc7 66. a4 Kb6 67. Rg5 Ka6 68. Kb4 Kb6 69. Rg6+ Kb7 70. Kc4 Na6 71. a5 Nc7 72. Rb6+ Ka7 73. Kc5 Na8 74. Rh6 {#r} 1-0

[Event "Zuerich"] [Site "Zuerich"] [Round "0"] [White "Olafsson, Fridrik"] [Black "Bhend, Edwin"] [Result "1-0"] [EventRounds "15"] [EventCountry "SUI"] [ECO "B15"] [Opening "Caro-Kann: 4.Nxe4 Nf6"] 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ gxf6 6. Nf3 Bg4 7. Be2 Nd7 8. O-O (8. Bf4 $2 Qa5+ 9. c3 O-O-O 10. O-O e5 11. dxe5 Nxe5 $1) 8... Qc7 9. Nh4 $1 Bxe2 10. Qxe2 e6 11. c4 Nb6 $2 (11... Bd6) 12. g3 $1 h5 13. Bf4 Qe7 (13... Bd6 $2 14. Bxd6 Qxd6 15. c5 $18) 14. Rfd1 O-O-O (14... Bh6 $2 15. Bxh6 Rxh6 16. d5 $1 cxd5 17. cxd5 Nxd5 (17... O-O-O $2 18. Nf5) 18. Rxd5 exd5 19. Qxe7+ Kxe7 20. Nf5+ $18) 15. a3 $1 Qe8 (15... Bh6 $2 16. Nf5) 16. b4 Bh6 17. Bxh6 Rxh6 18. a4 Rh8 19. b5 cxb5 20. axb5 Kb8 21. c5 Nc8 (21... Nd5 $2 22. Qa2) 22. Qf3 $1 f5 (22... Qe7 $142 23. Qf4+ e5) (22... Qxb5 $2 23. Rdb1 Qd7 24. c6 $18) 23. b6 a6 (23... axb6 24. Qf4+ e5 25. dxe5 Rxd1+ 26. Rxd1 bxc5 27. e6+ Ka8 28. Ra1+ Na7 29. exf7 Qxf7 30. Qa4 b6 31. Nxf5 $16) 24. Qf4+ $18 e5 (24... Ka8 25. Qc7 Qd7 26. Rxa6+ bxa6 27. b7+ Ka7 28. b8=Q#) 25. dxe5 Rxd1+ 26. Rxd1 Ne7 (26... Ka8 $142) (26... Qe6 $142) 27. e6+ Ka8 28. Qc7 Nc6 (28... fxe6 $2 29. Rd7 $1) 29. Rd7 Na5 30. c6 $1 Qc8 31. Qxc8+ Rxc8 32. c7 (32. c7 Nc6 33. exf7) 1-0

[Event "Zuerich"] [Site "Zuerich"] [Round "0"] [White "Olafsson, Fridrik"] [Black "Blau, Max"] [Result "1-0"] [EventRounds "15"] [EventCountry "SUI"] [ECO "A21"] [Opening "English: King's, 2.Nc3 d6 3.g3"] 1. c4 e5 2. Nc3 d6 3. g3 g6 4. Nf3 Bg7 5. d4 Nd7 6. Bg2 Ngf6 7. O-O O-O 8. e4 c6 9. h3 exd4 10. Nxd4 Re8 11. Be3 Qa5 $2 12. Qc2 Qa6 13. b3 Nc5 14. a4 Qa5 15. Rab1 Ne6 16. Nde2 Qc7 17. g4 a5 18. Ng3 Nd7 19. f4 Nef8 (19... Nd4 20. Qd2 Ne6 (20... c5 21. Nb5 $16)) 20. Qd2 Rd8 21. Rfd1 Ne6 (21... Nb8 $2 22. e5) 22. Nce2 Bf8 23. Nd4 Ng7 24. Nf3 Be7 25. Qf2 Re8 (25... Nf8 $2 26. Bb6) 26. f5 $1 f6 ( 26... Ne5 $2 27. Nxe5 dxe5 28. f6 $18) 27. h4 Rf8 28. Rd2 c5 $6 (28... Ne5 29. Nxe5 dxe5 30. Bb6 Qb8 31. Rbd1) 29. Rbd1 $18 Ra6 30. Ne2 Ne5 31. Nxe5 fxe5 ( 31... dxe5 32. Nc3) 32. Qg3 Bd7 (32... Qd8 33. Bf2) 33. Nc3 Bc6 34. Nb5 Bxb5 35. cxb5 $1 Raa8 36. Bf1 Kh8 37. Bc4 Ne8 (37... b6 $142) (37... Qd8 38. Bxc5 $5 (38. Rh2) (38. Bf2) 38... Bxh4 39. Qh3) 38. Bh6 Ng7 39. Rf2 gxf5 40. exf5 Qd8 41. Bxg7+ Kxg7 42. g5 $1 Kh8 43. f6 (43. f6 Bxf6 44. Rxf6 Rxf6 45. gxf6 Qxf6 46. Rf1 Qh6 47. Kh1 $1) {#r} 1-0

[Event "Zuerich"] [Site "Zuerich"] [Round "0"] [White "Olafsson, Fridrik"] [Black "Donner, Jan Hein"] [Result "1/2-1/2"] [EventRounds "15"] [EventCountry "SUI"] [ECO "A16"] [Opening "English: Anglo-Indian, 2.Nc3 g6 3.g3"] 1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. d4 d6 5. Nf3 Nc6 6. Bg2 O-O 7. O-O a6 8. Bg5 $146 (8. h3) (8. d5 Na5 9. Nd2) 8... h6 9. Bd2 e5 10. d5 Ne7 11. e4 Nd7 12. Ne1 f5 13. Nd3 Nf6 14. f3 g5 $1 15. f4 exf4 16. gxf4 fxe4 (16... Nxe4 17. Nxe4 fxe4 18. Bxe4 Bh3 19. Bg2 Bf5) 17. fxg5 (17. Nxe4 g4) 17... exd3 18. gxf6 Rxf6 19. Rxf6 Bxf6 20. Qh5 Bf5 21. Rf1 Bg6 22. Qxh6 Qf8 23. Qf4 Be5 {#d} 1/2-1/2

[Event "Zuerich"] [Site "Zuerich"] [Round "0"] [White "Olafsson, Fridrik"] [Black "Fischer, Robert James"] [Result "0-1"] [EventRounds "15"] [EventCountry "SUI"] [ECO "A16"] [Opening "English: Anglo-Indian, 2.Nc3 g6"] 1. c4 Nf6 2. Nc3 g6 3. d4 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. d5 (7. dxe5 dxe5 8. Qxd8 Rxd8 9. Nxe5 Nxe4 $1) 7... Nbd7 8. Bg5 h6 9. Bh4 a6 (9... g5 $142 $1 10. Bg3 Nh5 $1 11. h4 (11. Nd2 Nf4 12. O-O Nxe2+ 13. Qxe2 f5 14. exf5 Nf6 15. c5 Bxf5 16. Rac1 Rf7 $1 17. Nc4 Bf8 $17) 11... Nxg3 $1 12. fxg3 gxh4 $1 13. Rxh4 (13. Nxh4 Qg5 14. Nf5 Nf6) (13. gxh4 f5 14. exf5 Nf6 15. O-O Bxf5) 13... f5 14. Qc2 Nc5 15. Bd3 Qf6 $17) (9... Qe8 10. Nb5) 10. Nd2 Qe8 11. g4 $5 (11. O-O Nh7 12. b4 Ng5 (12... Bf6 $5) 13. f3 f5 $10) 11... Nh7 12. Qc2 (12. Bg3) 12... Ng5 $2 (12... Nc5 13. O-O-O (13. b4 Nd7 $17) 13... f5 $10) 13. h3 $1 Nc5 14. O-O-O Bd7 (14... f5 15. Bxg5 $1 hxg5 16. gxf5 gxf5 17. Rdg1 $16) 15. f3 ( 15. Rdg1 Na4 16. Nxa4 Bxa4 17. Qd3) 15... Na4 (15... b5 $5 16. b4 Nb7) 16. Nxa4 (16. Ncb1) (16. Bf2) 16... Bxa4 17. b3 Bd7 18. Bf2 c5 $1 19. h4 (19. dxc6 $2 bxc6 20. Nb1 d5 $1 21. exd5 (21. Bc5 d4 22. Bxf8 Bxf8 $44) 21... cxd5 22. Rxd5 Bc6 $36) 19... Nh7 20. Be3 b5 21. Nb1 $2 (21. Bd3 $142 $1) (21. h5 Ng5) (21. Rdg1 Kh8 22. Bd3 f5 23. exf5 gxf5 24. Bxf5 Bxf5 25. gxf5 Qh5 26. Ne4) 21... f5 $1 22. gxf5 gxf5 23. exf5 Bxf5 24. Qd2 e4 $1 (24... Rf6 $143) (24... h5 $143) 25. Rdg1 (25. Bxh6 e3 $1 26. Bxe3 (26. Qxe3 Bxb1 27. Kxb1 Qg6+ $19) 26... Bxb1 27. Kxb1 Qe5 $19) 25... exf3 $2 (25... Ra7 $1 26. Bxh6 exf3) 26. Bxh6 $2 (26. Rxg7+ Kxg7 27. Bxh6+ Kh8 28. Bxf8 Qxf8 29. Bxf3 Bxb1 30. Qc3+ $18) 26... Ra7 $1 27. Bxg7 (27. Bxf3 $2 Bxb1 $19) (27. Qb2 Qe5 $17) 27... Rxg7 28. Rxg7+ Kxg7 29. Bd3 (29. Bxf3 $2 Bxb1 30. Kxb1 Rxf3 31. Qg2+ Qg6+ $19) (29. Qc3+ Qe5 30. Qxf3 Bxb1 31. Qg4+ Bg6 $19 32. h5 Qa1+ $19) 29... bxc4 30. Rg1+ Kh8 31. Qc3+ (31. bxc4 f2 (31... Bxd3 32. Qxd3 Qe5 $17) 32. Rf1 Bxd3 33. Qxd3 Qe1+ 34. Kc2 Nf6 35. Nd2 Ng4 $19) 31... Qe5 32. Qxe5+ (32. Bxf5 Rxf5 33. bxc4 Nf6 34. Qxe5) 32... dxe5 33. Bxf5 Rxf5 34. bxc4 (34. d6 Nf6 35. Nd2 $1 cxb3 36. axb3 e4 37. Nc4 f2 38. Rf1 Ng4 39. Kd1 Nh2 $1 40. d7 Rd5+ $19) 34... Nf6 35. Nd2 (35. Kd2 Ng4 $1 36. Rf1 e4) (35. Kd1 e4) 35... f2 36. Rh1 (36. Rf1 e4) 36... e4 37. Kd1 (37. Nf1 Ng4 $1 38. Kd2 (38. d6 Rf6 39. d7 Rd6) 38... Rf3 $1 $19) 37... e3 38. Nf1 Re5 39. Ke2 (39. Ng3 Nh5 40. Ne2 (40. Nxh5 $2 e2+) 40... Kg7) 39... Nh5 $1 40. Kf3 e2 {#R} 0-1

[Event "Zuerich"] [Site "Zuerich"] [Round "0"] [White "Olafsson, Fridrik"] [Black "Keller, Dieter"] [Result "1-0"] [EventRounds "15"] [EventCountry "SUI"] [ECO "A16"] [Opening "English: Anglo-Indian, 2.Nc3"] 1. c4 Nf6 2. Nc3 e5 3. g3 Bc5 4. Bg2 O-O 5. e3 c6 6. Nge2 Bb6 7. d4 d6 8. O-O Re8 9. b3 Nbd7 10. Ba3 Nf8 11. d5 $1 c5 12. e4 Ba5 13. Bc1 Nh5 14. Bd2 (14. f4 exf4 15. gxf4 f5 $15) 14... Bg4 15. f3 (15. h3) 15... Bd7 16. Nc1 Nf6 17. Nd3 a6 18. Qc2 h5 19. h4 Qc8 20. Rae1 Ng6 21. Re2 b5 22. Bc1 bxc4 23. bxc4 Rb8 24. Nd1 Qb7 25. Bb2 Bd8 26. Ne3 Qc8 27. Bc3 a5 28. Nf2 a4 29. Nf5 $1 Qa6 (29... Bxf5 $2 30. exf5) 30. Qd3 Ne7 31. Ne3 Nc8 (31... Ng6 $142) 32. f4 $1 Nh7 (32... exf4 33. gxf4 Nh7 34. Nf5 Bxf5 35. exf5 $16) 33. fxe5 dxe5 34. Bh3 Bxh3 35. Nxh3 Nd6 36. Ref2 Ba5 37. Ba1 Rb7 38. Rc2 Nf6 $6 (38... f6 $142) 39. Ng5 Nh7 40. Nxh7 Kxh7 41. Kh2 $16 Bd8 42. Rg2 a3 (42... Rb4 43. Bc3) 43. Rfg1 g6 $2 ( 43... Rb4 $142) (43... f6 $142) 44. g4 $1 $18 hxg4 45. Rxg4 Bf6 46. Qf1 Kg7 ( 46... Bh8 47. h5 $1 gxh5 48. Rh4) 47. h5 g5 (47... Rh8 48. Rxg6+) 48. h6+ Kg6 49. Qg2 Nxe4 50. Qxe4+ Kxh6 51. Nf5+ {#r} 1-0

[Event "Zuerich"] [Site "Zuerich"] [Round "0"] [White "Olafsson, Fridrik"] [Black "Larsen, Bent"] [Result "0-1"] [EventRounds "15"] [EventCountry "SUI"] [ECO "B45"] [Opening "Sicilian: Taimanov, 5.Nc3"] 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Nf6 6. Ndb5 d6 $6 (6... Bb4 7. a3) 7. Bf4 e5 (7... Ne5 $2 8. Qd4) 8. Bg5 a6 9. Na3 (9. Bxf6 gxf6 10. Na3 d5 $5 ) 9... b5 (9... Be6 10. Nc4 Nd4 11. Bxf6 $1 gxf6 (11... Qxf6) 12. Ne3 $1 $16) 10. Nd5 Be6 11. c3 Be7 12. Bxf6 Bxf6 13. Nxf6+ gxf6 14. Nc2 O-O 15. Bd3 Kh8 16. O-O Rg8 17. Ne3 b4 $1 18. Bc4 (18. cxb4 Nxb4 19. a3 Nc6) 18... bxc3 19. bxc3 Ne7 20. Qd3 Ng6 21. g3 (21. Rfd1 Nf4) 21... Nf4 22. Qd2 Bxc4 23. Nxc4 d5 24. exd5 Qxd5 25. Qxd5 Nxd5 26. Rac1 $2 (26. Nd6 Nxc3 (26... Kg7 27. c4) 27. Nxf7+ $10) 26... Rac8 27. Nd6 Rxc3 $2 (27... Rc6 $1 28. Nxf7+ $2 Kg7 29. c4 Ne7 $1) 28. Nxf7+ Kg7 29. Nd6 Rb8 30. Rcd1 Ne7 31. Rb1 Rxb1 32. Rxb1 Kg6 33. Rb7 Nd5 34. Rb8 f5 35. h4 Rc6 (35... Rc1+ 36. Kg2 Rc2 37. Kf1 Rxa2 38. Rf8 Nf6 (38... Ne7) 39. h5+ $1 $10) 36. Rd8 Nf6 37. h5+ $1 Nxh5 38. Rg8+ Kf6 39. Rf8+ Ke7 40. Rxf5 Nxg3 $1 41. fxg3 Kxd6 42. Rh5 Kd5 43. Rxh7 Kd4 44. g4 Ke3 (44... Rg6 45. Rh4 Ke3 46. Kf1 Kf4 (46... e4 47. Ke1 $1 Kd3 48. Rh3+ e3 49. Rh8 $10) 47. g5+ Kxg5 48. Ra4) 45. Kg2 e4 46. Kg3 Rc1 47. Ra7 Rg1+ 48. Kh4 Kf4 49. Rf7+ Ke5 50. Kg5 $4 (50. Re7+ $1 Kd4 (50... Kd5 51. g5) 51. Rd7+ Ke3 52. Ra7 $10) 50... e3 51. Re7+ Kd4 (51... Kd4 52. Kf5 Kd3 53. Rd7+ Kc2 54. Rc7+ Kd2 55. Rd7+ Ke1 $19) {#R} 0-1

[Event "Zuerich"] [Site "Zuerich"] [Round "0"] [White "Olafsson, Fridrik"] [Black "Nievergelt, Erwin"] [Result "1-0"] [EventRounds "15"] [EventCountry "SUI"] [ECO "A65"] [Opening "Benoni: 6.e4"] 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 ( 8. Bd3 $142) 8... O-O 9. Bg5 (9. O-O Re8 10. Nd2 Na6 11. f3 Nc7) 9... h6 10. Bh4 g5 11. Bg3 Nh5 12. Nd2 Nf4 (12... Nxg3 $142) 13. Bxf4 gxf4 14. O-O a6 15. Bg4 $1 f5 16. Bxf5 Bxf5 17. exf5 Rxf5 18. Qg4 Qg5 19. Qxg5 Rxg5 (19... hxg5 20. Nc4) 20. Nc4 Nd7 (20... Rg6 21. Nb6 Ra7 22. Nc8 $18) 21. Nxd6 b5 (21... Bxc3 22. bxc3 Rxd5 23. Rad1 $18) 22. Nde4 Rg6 23. Rac1 Re8 24. f3 Bd4+ 25. Kh1 Ne5 26. b3 Kh8 27. Rc2 Reg8 28. d6 $1 Be3 29. Nd5 Nc6 30. Nxe3 fxe3 31. g3 Nd4 32. Rxc5 Re6 33. Kg2 Rd8 34. Re1 e2 35. Rd5 {#r} 1-0

[Event "Zuerich"] [Site "Zuerich"] [Round "0"] [White "Tal, Mihail"] [Black "Olafsson, Fridrik"] [Result "1-0"] [WhiteElo "2505"] [EventRounds "15"] [EventCountry "SUI"] [ECO "B40"] [Opening "Sicilian: Open, 2...e6, 4.Nxd4"] 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 (6. Nxc6 bxc6 7. e5 Nd5 8. Ne4) 6... Bb4 7. a3 (7. Nd6+ Ke7 $1 8. Nxc8+ Rxc8 $36) 7... Bxc3+ 8. Nxc3 d5 9. exd5 exd5 (9... Nxd5 10. Nxd5 exd5) 10. Bd3 O-O 11. O-O h6 (11... Bg4 12. f3 Be6 13. Qd2 $1 (13. Bg5 Qb6+)) 12. Bf4 d4 13. Nb5 $1 Nd5 14. Bg3 Be6 15. Re1 Qd7 16. h3 a6 17. Nd6 Nf6 18. Qf3 Kh8 (18... Ne8 $2 19. Nf5 (19. Ne4 $2 Qd5)) 19. Rad1 Nh7 20. Bxh7 Kxh7 21. c3 dxc3 22. Ne4 Qc8 23. Qxc3 Ne7 24. Nc5 Nf5 25. Bc7 $1 b5 (25... Qxc7 $2 26. Nxe6 Qxc3 27. Nxf8+) 26. Nxe6 fxe6 27. Qc6 Ne7 (27... Rf7 28. Rd8) (27... Ra7 28. Rd7) 28. Qxe6 Qxc7 29. Qxe7 Qb6 30. Re3 Rad8 31. Rd7 Rxd7 32. Qxf8 Rd1+ 33. Kh2 Rd8 34. Qf5+ Kh8 35. Re6 Qc7+ 36. g3 Qd7 37. Qe5 Qd2 38. Kg2 Rf8 39. Qe2 Qd5+ 40. Kg1 Rc8 41. Qe4 Qd2 42. Qe5 Rf8 43. Qe2 Qc1+ 44. Kg2 Qc8 45. b4 Qb7+ 46. Kg1 Qc8 47. Qe3 Kg8 48. h4 Kh8 49. Re7 Qg4 50. Kg2 Qf5 51. Qd4 Qf3+ 52. Kg1 Rf7 53. Re6 Kg8 54. Rxa6 Re7 55. Qd8+ Kf7 56. Qd2 Kg8 (56... Re2 $142 57. Qf4+ $18) 57. Rd6 Qf8 58. Rd5 Re8 59. Rxb5 Qf6 60. Ra5 Kh8 61. Qd5 Rf8 62. Qd2 Qf3 63. Rd5 Qxa3 64. Rd8 {#r} 1-0

[Event "Zuerich"] [Site "Zuerich"] [Round "0"] [White "Unzicker, Wolfgang"] [Black "Olafsson, Fridrik"] [Result "1/2-1/2"] [EventRounds "15"] [EventCountry "SUI"] [ECO "B90"] [Opening "Sicilian: Najdorf"] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 h6 (7... Qb6 8. Qd2 (8. Nb3 Qe3+ 9. Qe2 Qxe2+ 10. Bxe2 Nbd7 11. O-O-O b6 12. f5 e5 13. Bc4 $1 Bb7 14. Bd5 $16) 8... Qxb2 9. Rb1 Qa3 10. e5) 8. Bh4 Qb6 9. Rb1 (9. Qd3 $5) 9... Nc6 10. Bf2 Qc7 11. Bd3 Be7 12. O-O b5 13. Nxc6 Qxc6 14. Qe2 b4 15. Nb5 Bb7 16. Nd4 Qd7 17. Rbd1 O-O 18. Bh4 Rfd8 19. Kh1 Qe8 20. Qe1 Rab8 21. Qe2 Ra8 {#d} 1/2-1/2

[Event "Zuerich"] [Site "Zuerich"] [Round "0"] [White "Walther, Edgar"] [Black "Olafsson, Fridrik"] [Result "1/2-1/2"] [EventType "tourn"] [EventRounds "15"] [EventCountry "SUI"] [ECO "E46"] [Opening "Nimzo-Indian: 4.e3 O-O"] 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nge2 d5 6. a3 Be7 7. Nf4 c6 8. Bd3 Nbd7 9. cxd5 cxd5 10. O-O b6 11. Qf3 Bb7 12. Rd1 Rc8 13. Bd2 Re8 14. Qh3 Nf8 15. Rac1 Bd6 16. Nce2 Qd7 17. Ng3 Rxc1 18. Rxc1 Rc8 19. Rxc8 Qxc8 20. Nfh5 Nxh5 21. Nxh5 Ba6 22. Qg4 Ng6 23. Bxa6 Qxa6 $36 24. Qd1 Qd3 25. Qc1 h6 26. g3 Qe2 27. Nf4 Bxf4 28. exf4 Ne7 29. Qc7 Nf5 30. Bc3 h5 (30... Nxd4 $5 31. Bxd4 Qd1+ 32. Kg2 Qxd4 33. Qb8+ Kh7 34. Qxa7 $17) 31. h4 Nh6 32. Qe5 $1 Qd1+ 33. Qe1 Qf3 34. Qe3 Qxe3 35. fxe3 Ng4 36. Bd2 Kh7 37. Kg2 Kg6 38. Kf3 Kf5 39. Bb4 b5 40. Bc5 a6 41. Bf8 Kg6 42. Be7 Kf5 43. Bf8 g6 44. Be7 f6 45. Bd6 Nh6 46. Bb8 Nf7 47. Bc7 g5 48. fxg5 fxg5 49. b3 gxh4 50. gxh4 Nh8 51. a4 Ng6 52. axb5 axb5 53. Bd8 e5 54. Bg5 Nf8 55. dxe5 Kxe5 56. Bf4+ Kf5 57. Bc7 Nd7 58. Ke2 Nc5 59. Bb6 Nd7 $5 60. Bd8 Ke4 61. Be7 Ne5 62. Bg5 Nf3 63. Bf6 Nh2 64. Bg5 Ng4 65. Kd2 Nf2 66. Kc3 Ng4 67. Kd2 Ne5 68. Ke2 Nf7 69. Be7 Nh6 70. Bg5 Nf5 71. Kf2 d4 72. exd4 Nxd4 73. b4 Nc6 74. Bd2 Kd3 75. Be1 Nd4 76. Kg3 Nc2 77. Bf2 Nxb4 78. Kf4 Nd5+ 79. Kg5 b4 80. Bc5 b3 81. Ba3 Ne3 82. Bb2 Nd1 83. Ba1 {#d} 1/2-1/2