[Event "Portoroz Interzonal"] [Site "Portoroz"] [Round "1"] [White "Olafsson, Fridrik"] [Black "Szabo, Laszlo"] [Result "1-0"] [BlackElo "2505"] [EventType "tourn"] [EventRounds "21"] [EventCountry "YUG"] [ECO "A34"] [Opening "English: Symmetrical"] 1.c4 c5 2.Nc3 e6 3.Nf3 d5 4.cxd5 exd5 5.d4 Nc6 6.g3 c4 7.Bg2 Bb4 8.O-O Nge7 9.e4 O-O 10.exd5 Nxd5 11.Ng5 Nf6 12.d5 Na5 13.Nge4 Nxe4 14.Nxe4 Bf5 15.Bg5 f6 16.Bd2 Bxd2 17.Qxd2 Qb6 18.Rfe1 Rfe8 19.d6 Kh8 20.Nc3 Red8 21.Nd5 Qc5 22.Qf4 Bg6 23.Nc7 Rac8 24.Rad1 Qb6 25.Bh3 Rb8 26.d7 Nc6 27.Ne6 Qxb2 28.Nxd8 Rxd8 29.Qc7 Qb6 30.Qxb6 axb6 31.Rb1 Ne5 32.Rxe5 fxe5 33.Rxb6 Be4 34.Re6 Bc6 35.Rxe5 Kg8 36.Rc5 Kf7 37.Rxc4 Ke7 38.f4 Ra8 39.Rd4 Kd8 40.Be6 Ra3 41.f5 Re3 42.Rg4 g6 {#r} 1-0

[Event "Portoroz Interzonal"] [Site "Portoroz"] [Round "2"] [White "Pachman, Ludek"] [Black "Olafsson, Fridrik"] [Result "1/2-1/2"] [EventType "tourn"] [EventRounds "21"] [EventCountry "YUG"] [ECO "B24"] [Opening "Sicilian: Closed, 3.g3 g6"] 1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. Be3 Nf6 7. Qc1 Nd4 8. Nd1 e5 9. c3 Ne6 10. Bh6 O-O 11. Bxg7 Nxg7 12. Ne2 Be6 13. f4 Bg4 14. Qd2 Bxe2 15. Qxe2 exf4 16. gxf4 Nfh5 17. O-O Ne6 18. Qg4 Nf6 19. Qf3 Nh5 20. Qg4 Nf6 {#d} 1/2-1/2

[Event "Portoroz Interzonal"] [Site "Portoroz"] [Round "3"] [White "Olafsson, Fridrik"] [Black "Matanovic, Aleksandar"] [Result "1/2-1/2"] [EventType "tourn"] [EventRounds "21"] [EventCountry "YUG"] [ECO "A17"] [Opening "English: Anglo-Indian, 2.Nc3 e6 3.Nf3 d5"] 1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. d4 Bb4 5. e3 O-O 6. Bd3 c5 7. O-O Nc6 8. a3 Bxc3 9. bxc3 dxc4 10. Bxc4 Qc7 11. Bb2 e5 12. h3 e4 13. Nh2 Ne7 14. Ba2 c4 15. a4 Re8 16. Qe2 Be6 17. Ba3 Ned5 18. Rfc1 Rac8 19. Nf1 Qa5 20. Qc2 Bd7 21. Nd2 Bxa4 22. Qb2 Qb5 23. Qxb5 Bxb5 24. Bc5 b6 25. Bd6 a6 26. g4 h5 27. Bb1 hxg4 28. hxg4 Rcd8 29. Bg3 g5 30. Ba2 Rc8 31. Bb1 a5 32. Be5 Nxg4 33. Bxe4 Nxe5 34. Bxd5 Red8 35. Bg2 Bc6 36. Rcb1 Bxg2 37. Kxg2 Nd7 38. Rb5 f6 39. Ra4 Kf7 40. Nxc4 Rc6 41. d5 {#d} 1/2-1/2

[Event "Portoroz Interzonal"] [Site "Portoroz"] [Round "4"] [White "Filip, Miroslav"] [Black "Olafsson, Fridrik"] [Result "1/2-1/2"] [WhiteElo "2300"] [EventType "tourn"] [EventRounds "21"] [EventCountry "YUG"] [ECO "A15"] [Opening "English: Anglo-Indian, 2.Nf3 g6"] 1. c4 Nf6 2. Nf3 g6 3. Nc3 Bg7 4. e4 d6 5. d4 O-O 6. Be2 Nbd7 7. O-O e5 8. Re1 c6 9. Bf1 Qe7 10. Rb1 a6 11. d5 cxd5 12. cxd5 Ne8 13. Nd2 f5 14. exf5 gxf5 15. f4 Nef6 16. Nf3 Qd8 17. h3 Ne4 18. Nxe4 fxe4 19. Ng5 Nc5 20. fxe5 Bxe5 21. Qh5 Bf5 22. Be3 Bg6 23. Qg4 Bf5 {#d} 1/2-1/2

[Event "Portoroz Interzonal"] [Site "Portoroz"] [Round "5"] [White "Olafsson, Fridrik"] [Black "Cardoso, Radolfo Tan"] [Result "1-0"] [EventType "tourn"] [EventRounds "21"] [EventCountry "YUG"] [ECO "B40"] [Opening "Sicilian: Open, 2...e6, 4.Nxd4"] 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Bb4 6. e5 Nd5 7. Bd2 Bxc3 8. bxc3 Qc7 9. f4 a6 10. c4 Ne7 11. Bd3 d6 12. O-O dxe5 13. fxe5 Ng6 14. Qg4 Nc6 15. Nxc6 bxc6 16. Rae1 c5 17. h4 O-O 18. Qg5 Qd8 19. h5 Nh8 20. Qg3 f5 21. exf6 Rxf6 22. Bc3 Rxf1+ 23. Rxf1 Qe7 24. h6 e5 25. Bxe5 Ng6 26. Bd6 Qd7 27. Bxg6 hxg6 28. h7+ {#r} 1-0

[Event "Portoroz Interzonal"] [Site "Portoroz"] [Round "6"] [White "Gligoric, Svetozar"] [Black "Olafsson, Fridrik"] [Result "0-1"] [WhiteElo "2420"] [EventType "tourn"] [EventRounds "21"] [EventCountry "YUG"] [ECO "C70"] [Opening "Spanish: 4.Ba4"] 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 Bd7 6. d4 g6 7. O-O Bg7 8. dxe5 dxe5 9. Be3 Nf6 10. Nbd2 Qe7 11. b4 b6 12. Bb3 O-O 13. Qc2 h6 14. Nc4 Be6 15. a4 Nd7 16. a5 b5 17. Ncd2 Nd8 18. Ne1 c5 19. bxc5 Nxc5 20. Bxc5 Qxc5 21. Nd3 Qc7 22. Nb4 Nc6 23. Nd5 Bxd5 24. exd5 Ne7 25. c4 Nf5 26. Qa2 Nd4 27. cxb5 axb5 28. Ne4 Nxb3 29. Qxb3 f5 30. Rac1 Qf7 31. Nc5 Rfc8 32. Ne6 Qd7 33. Rc6 Bf6 34. Rfc1 e4 35. Nc7 Rxa5 36. Rxf6 Rxc7 37. d6+ Rc4 38. Rxc4 bxc4 39. Qc3 Rd5 40. Qxc4 Qc6 41. Qf1 Qc2 {#R} 0-1

[Event "Portoroz Interzonal"] [Site "Portoroz"] [Round "7"] [White "Olafsson, Fridrik"] [Black "Neikirkh, Oleg"] [Result "0-1"] [EventType "tourn"] [EventRounds "21"] [EventCountry "YUG"] [ECO "A17"] [Opening "English: Anglo-Indian, 2.Nc3 e6 3.Nf3 d5"] 1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. e3 c5 5. d4 Nc6 6. cxd5 Nxd5 7. Bd3 Be7 8. O-O O-O 9. a3 Nxc3 10. bxc3 Bf6 11. Qc2 g6 12. Rd1 Qe7 13. a4 b6 14. Ba3 Na5 15. dxc5 bxc5 16. Rab1 Qc7 17. c4 Bd7 18. h4 Rfb8 19. Ng5 Rb6 20. Ne4 Be7 21. Qc3 Rxb1 22. Rxb1 e5 23. Qc2 Rd8 24. Nc3 Be6 25. Nd5 Bxd5 26. cxd5 Rxd5 27. h5 Qd6 28. Bf1 Nc6 29. Qe4 Rd2 30. h6 Qf6 31. f3 Qg5 32. Bc1 Rd6 33. f4 exf4 34. exf4 Qxh6 35. f5 Qh4 36. Qxh4 Bxh4 37. Bh6 g5 38. g3 Rxh6 39. gxh4 Rxh4 40. Bg2 Nb4 41. Re1 Rf4 42. Re5 Nd3 43. Re3 c4 44. Bd5 Nb2 45. Be4 Nxa4 46. Bc2 Nc5 47. Re5 Nd3 48. Ra5 Kg7 {#R} 0-1

[Event "Portoroz Interzonal"] [Site "Portoroz"] [Round "8"] [White "Fuster, Geza"] [Black "Olafsson, Fridrik"] [Result "0-1"] [EventType "tourn"] [EventRounds "21"] [EventCountry "YUG"] [ECO "A81"] [Opening "Dutch: 2.g3 Nf6 3.Bg2 e6"] 1. d4 f5 2. g3 Nf6 3. Bg2 e6 4. Nf3 Be7 5. O-O O-O 6. c4 d6 7. Nc3 Qe8 8. Re1 Qg6 9. b3 Nc6 10. d5 exd5 11. Nxd5 Nxd5 12. Qxd5+ Be6 13. Qd2 f4 14. Bb2 Rf7 15. Nd4 Nxd4 16. Bxd4 Raf8 17. Rf1 h5 18. Kh1 fxg3 19. hxg3 h4 20. Qd3 Bf5 21. Qe3 c6 22. Bxa7 Bg5 23. Qc3 Qh6 24. Kg1 hxg3 25. Qxg3 Bf4 26. Be3 Bxg3 27. Bxh6 Be5 28. Bg5 Bxa1 29. Rxa1 Re8 30. e3 Be4 31. Bh3 Bf3 32. a4 d5 33. c5 g6 34. Kf1 Rh7 35. Bg2 Be4 36. f3 Bc2 37. b4 Rh5 38. Bf4 g5 39. Bg3 Rxe3 40. Bf2 Rb3 41. Be1 g4 42. fxg4 Rg5 43. b5 Rxg4 44. Ra2 Bd3+ 45. Kf2 Be4 46. Bf1 Rf4+ 47. Kg1 Rb1 48. Re2 Rxf1+ 49. Kxf1 Bd3 {#R} 0-1

[Event "Portoroz Interzonal"] [Site "Portoroz"] [Round "9"] [White "Olafsson, Fridrik"] [Black "Rossetto, Hector"] [Result "0-1"] [EventType "tourn"] [EventRounds "21"] [EventCountry "YUG"] [ECO "A05"] [Opening "Reti: 1...Nf6"] 1. Nf3 Nf6 2. c4 e6 3. g3 d5 4. Bg2 c6 5. b3 Nbd7 6. O-O Be7 7. Qc2 O-O 8. Bb2 a5 9. Nc3 Nb6 10. d3 a4 11. e4 axb3 12. axb3 Rxa1 13. Rxa1 Qc7 14. Ne2 dxe4 15. dxe4 Nbd7 16. Nc1 Rd8 17. e5 Ng4 18. Nd3 Nc5 19. Nxc5 Bxc5 20. Rf1 Qd7 21. h3 Nh6 22. g4 Qd3 23. Rc1 Be7 24. Qxd3 Rxd3 25. Bc3 f5 26. g5 Nf7 27. h4 c5 28. Ne1 Rd8 29. Kf1 Nh8 30. Ba5 Rd4 31. Ra1 Ng6 32. Bb6 Bd7 33. Ra8+ Kf7 34. Bxb7 Nxe5 35. h5 Rd1 36. f4 Ng4 37. Ke2 Rb1 38. Nd3 Rxb3 39. Rh8 Rxb6 40. Bf3 Bd6 41. h6 {#R} 0-1

[Event "Portoroz Interzonal"] [Site "Portoroz"] [Round "10"] [White "Benko, Pal C"] [Black "Olafsson, Fridrik"] [Result "1/2-1/2"] [EventType "tourn"] [EventRounds "21"] [EventCountry "YUG"] [ECO "E10"] [Opening "Neo-Indian: 3.Nf3"] 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 b4 9. Ne4 Nxe4 10. Bxe4 Bb7 11. Qa4 Qb6 12. O-O Be7 13. Nd2 Rc8 14. a3 Ba6 15. Rd1 Be2 16. Re1 Bb5 17. Qc2 Nf6 18. Bd3 O-O 19. Nc4 Bxc4 20. Qxc4 bxa3 21. bxa3 c5 22. dxc5 Rxc5 23. Qa6 Rd8 24. Qxb6 axb6 25. Be2 Ne4 26. Bf3 f5 27. Rb1 Rdc8 28. Bxe4 fxe4 29. Bd2 Rc2 30. Bb4 Bf6 31. Kf1 Be5 32. Re2 Kf7 33. Rxc2 Rxc2 34. Be1 Bb2 35. a4 Ke7 36. a5 bxa5 37. Bxa5 Kd6 38. Rd1+ Kc5 39. Bc7 Kc4 40. Bb6 g6 41. Bd4 {#d} 1/2-1/2

[Event "Portoroz Interzonal"] [Site "Portoroz"] [Round "11"] [White "Olafsson, Fridrik"] [Black "Fischer, Robert James"] [Result "1-0"] [EventType "tourn"] [EventRounds "21"] [EventCountry "YUG"] [ECO "A17"] [Opening "English: Anglo-Indian, 2.Nc3 e6 3.Nf3 d5"] 1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. d4 Bb4 5. cxd5 exd5 6. Bg5 h6 7. Bh4 c5 8. e3 Nc6 9. Rc1 c4 10. Be2 Be6 11. O-O O-O 12. Nd2 Be7 13. b3 g5 14. Bg3 Ba3 15. Rc2 Nb4 16. bxc4 Nxc2 17. Qxc2 dxc4 18. Nb5 Bb4 19. Nc7 Bxd2 20. Nxe6 fxe6 21. Bxc4 Qe8 22. Qxd2 Ne4 23. Qd3 Nxg3 24. hxg3 Rf6 25. Qe4 Rc8 26. Bb3 Qd7 27. Rd1 Re8 28. f4 Qh7 29. Qe5 Qf5 30. g4 Qxe5 31. dxe5 Rf7 32. f5 Rc7 33. Rd6 Rc5 34. Bxe6+ Kf8 35. Bb3 Rcxe5 36. Rxh6 Rxe3 37. Rg6 R8e4 38. Rxg5 Rg3 39. Rg8+ Ke7 40. g5 Re2 41. Bd5 Kd6 42. Bf3 Rxa2 43. f6 Ke6 44. Re8+ {#r} 1-0

[Event "Portoroz Interzonal"] [Site "Portoroz"] [Round "12"] [White "Bronstein, David I"] [Black "Olafsson, Fridrik"] [Result "1-0"] [EventType "tourn"] [EventRounds "21"] [EventCountry "YUG"] [ECO "B90"] [Opening "Sicilian: Najdorf"] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 Nbd7 7. a3 g6 8. h4 Ne5 9. Bb3 Bg7 10. Bg5 Qa5 11. Qd2 Bd7 12. Bxf6 Bxf6 13. Nd5 Qxd2+ 14. Kxd2 Rc8 15. Nxf6+ exf6 16. Rad1 Ke7 17. Bd5 Bc6 18. b3 Bxd5 19. exd5 f5 20. c4 Kd7 21. f3 h5 22. Rc1 Rc7 23. a4 Re8 24. Rhe1 Kd8 25. Re2 Nd7 26. Rxe8+ Kxe8 27. a5 Ne5 28. Ne2 Kd7 29. Kc3 Rc8 30. Kd4 Re8 31. Nf4 Kc7 32. b4 Kd7 33. Rc2 Kc7 34. Re2 Kd7 35. c5 Rc8 36. Rxe5 dxe5+ 37. Kxe5 Re8+ 38. Kf6 Re3 39. Kxf7 Rb3 40. Nxg6 Rxb4 41. Ne5+ Kc8 42. d6 Rb2 43. Ke8 Rd2 44. Ng6 Kb8 45. g3 Rd1 46. Ne7 {#r} 1-0

[Event "Portoroz Interzonal"] [Site "Portoroz"] [Round "13"] [White "Olafsson, Fridrik"] [Black "Averbakh, Yuri L"] [Result "1-0"] [EventType "tourn"] [EventRounds "21"] [EventCountry "YUG"] [ECO "A15"] [Opening "English: Anglo-Indian, 2.g3"] 1. c4 Nf6 2. g3 c6 3. Bg2 d5 4. Nf3 g6 5. b3 Bg7 6. Bb2 O-O 7. O-O a5 8. Na3 Na6 9. d3 Bg4 10. Nc2 Re8 11. Ne5 Bc8 12. Qc1 Nb4 13. a3 Nxc2 14. Qxc2 Qb6 15. e3 Be6 16. Rab1 Red8 17. Bc3 Nd7 18. Nf3 Bxc3 19. Qxc3 Bg4 20. Nd4 e5 21. Nc2 Be6 22. Kh1 Qc5 23. f4 Qd6 24. Rbd1 dxc4 25. bxc4 Qc5 26. fxe5 Qxe5 27. d4 Qg7 28. c5 a4 29. e4 Bb3 30. Rd2 Nf8 31. Ne3 h5 32. Nc4 Bxc4 33. Qxc4 Nd7 34. Rdf2 Rf8 35. e5 Rae8 36. Bh3 Nb8 37. Rf6 Re7 38. e6 Kh7 39. Rxf7 Rexf7 40. exf7 Na6 41. Bg2 Nc7 42. h4 Kh8 43. Rf4 Kh7 44. Kh2 Kh8 45. Qa2 Kh7 46. Be4 Nb5 47. Qf2 Nc3 48. Bg2 Kh8 49. Qe3 Nb5 50. Bf1 Kh7 51. Bc4 Kh8 52. Bxb5 cxb5 53. Qf3 b4 54. axb4 a3 55. Qxb7 a2 56. Qa7 Rxf7 57. Rxf7 Qxf7 58. Qxf7 a1=Q 59. Qf2 {#r} 1-0

[Event "Portoroz Interzonal"] [Site "Portoroz"] [Round "14"] [White "Larsen, Bent"] [Black "Olafsson, Fridrik"] [Result "0-1"] [EventType "tourn"] [EventRounds "21"] [EventCountry "YUG"] [ECO "A05"] [Opening "Reti: KIA"] 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O O-O 5. c4 c6 6. d4 d6 7. Nc3 Nbd7 8. e4 e5 9. Re1 Ne8 10. Bg5 f6 11. Be3 Qe7 12. Qd2 f5 13. c5 Qf7 14. exf5 gxf5 15. cxd6 e4 16. Ng5 Qf6 17. d5 Nxd6 18. Ne6 Nc4 19. Qe2 Nxe3 20. Nxf8 Nxd5 21. Nxd7 Bxd7 22. Rac1 Re8 23. Red1 Be6 24. Nxd5 Bxd5 25. b3 Bh6 26. f4 Bf8 27. Qh5 Bf7 28. Qg5+ Qxg5 29. fxg5 Bh5 30. Rd7 e3 31. Rxb7 e2 32. Kf2 Bc5+ 33. Ke1 Rd8 {#R} 0-1

[Event "Portoroz Interzonal"] [Site "Portoroz"] [Round "15"] [White "Olafsson, Fridrik"] [Black "Sanguineti, Raul"] [Result "1/2-1/2"] [EventType "tourn"] [EventRounds "21"] [EventCountry "YUG"] [ECO "A16"] [Opening "English: Anglo-Indian, 2.Nc3 c6"] 1. c4 Nf6 2. Nc3 c6 3. d4 d5 4. e3 g6 5. Nf3 Bg7 6. Be2 O-O 7. O-O Bg4 8. cxd5 Nxd5 9. Qb3 Nb6 10. Rd1 N8d7 11. a4 Be6 12. Qc2 Nd5 13. a5 Nc7 14. h3 f5 15. Ng5 Bd5 16. Nxd5 cxd5 17. Nf3 e6 18. Bd2 Rf7 19. Rdc1 Ne8 20. a6 b6 21. Ra3 Bf8 22. Rc3 Qf6 23. Rc6 Ng7 24. Bb5 g5 25. Rc8 Rxc8 26. Qxc8 g4 27. Nh2 gxh3 28. Bxd7 Qg6 29. g3 f4 30. exf4 Qe4 31. Kf1 Nf5 32. Be3 Nxe3+ 33. fxe3 Rxd7 34. Qxd7 Qg2+ 35. Ke1 Bb4+ 36. Rc3 Bxc3+ 37. bxc3 Qxg3+ 38. Kd1 Qg1+ 39. Kc2 Qxh2+ 40. Kb3 Qg2 41. Qxe6+ Kf8 42. Qf6+ {#d} 1/2-1/2

[Event "Portoroz Interzonal"] [Site "Portoroz"] [Round "16"] [White "Panno, Oscar"] [Black "Olafsson, Fridrik"] [Result "1/2-1/2"] [EventType "tourn"] [EventRounds "21"] [EventCountry "YUG"] [ECO "D11"] [Opening "Slav: 4.e3"] 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 e6 5. Nc3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 b4 9. Ne4 Nxe4 10. Bxe4 Bb7 11. O-O Be7 12. b3 O-O 13. Bb2 Nf6 14. Bd3 c5 15. dxc5 Bxc5 16. Rc1 Be7 17. Ne5 Qd5 18. f3 Rac8 19. e4 Rxc1 20. Qxc1 Qa5 21. Qb1 Rd8 22. Rd1 Nd7 23. Nc4 Qc5+ 24. Kh1 Nb6 25. Qa1 Bf8 {#d} 1/2-1/2

[Event "Portoroz Interzonal"] [Site "Portoroz"] [Round "18"] [White "Olafsson, Fridrik"] [Black "Tal, Mihail"] [Result "1/2-1/2"] [BlackElo "2505"] [EventType "tourn"] [EventRounds "21"] [EventCountry "YUG"] [ECO "A17"] [Opening "English: Anglo-Indian, 2.Nc3 e6 3.Nf3"] 1. c4 Nf6 2. Nc3 e6 3. Nf3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 Nc6 9. Qf4 O-O 10. Rd1 Qb8 11. Qxb8 Raxb8 12. Bf4 Rbc8 13. Ne5 d6 14. Nxc6 Bxc6 15. Bxd6 Bxd6 16. Rxd6 Bxg2 17. Kxg2 Rxc4 18. Rad1 g6 19. f3 Kg7 20. e4 e5 21. R1d2 Rfc8 22. Kf2 R4c6 23. Ke3 Kf8 24. Rxc6 Rxc6 25. Rd8+ Ke7 26. Ra8 a5 27. g4 g5 28. Rb8 Re6 29. Nd5+ Nxd5+ 30. exd5 Rh6 31. Rb7+ Ke8 32. Ke4 Rxh2 33. Rxb6 Re2+ 34. Kf5 h6 35. Rxh6 Rxb2 36. Kxe5 Rxa2 37. Ra6 Ra3 38. Ra8+ Kd7 39. Ra7+ Ke8 40. Ra8+ Kd7 41. Ra7+ Ke8 42. Kd6 Kf8 43. Kd7 a4 44. d6 Kg7 45. Ke8 Rxf3 46. Rxa4 Re3+ 47. Kd8 f5 48. gxf5 Kf6 49. Ra6 Kxf5 50. Kc7 g4 51. d7 Re7 52. Kd6 Rxd7+ 53. Kxd7 g3 54. Kd6 g2 55. Ra1 Ke4 {#d} 1/2-1/2

[Event "Portoroz Interzonal"] [Site "Portoroz"] [Round "19"] [White "Petrosian, Tigran V"] [Black "Olafsson, Fridrik"] [Result "1/2-1/2"] [WhiteElo "2379"] [EventType "tourn"] [EventRounds "21"] [EventCountry "YUG"] [ECO "E90"] [Opening "King's Indian: 5.Nf3"] 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. d5 Nh5 8. g3 Nd7 9. Be3 Nhf6 10. Nd2 c6 11. h4 Ne8 12. g4 f5 13. gxf5 gxf5 14. exf5 Ndf6 15. h5 h6 16. Qc2 cxd5 17. cxd5 b5 18. Bxb5 Ng4 19. Nde4 Bxf5 20. Bd3 Kh8 21. Qe2 Qa5 22. Bd2 Ngf6 23. Nxf6 Rxf6 24. Rg1 Qb6 25. Bxf5 Rxf5 26. Be3 Qb4 27. a3 Qb3 28. Rg6 e4 29. Kf1 Nf6 30. Bxh6 Bxh6 31. Rxh6+ Kg7 32. Rg6+ Kf7 33. Nxe4 Qh3+ 34. Kg1 Nxe4 35. Qxe4 Rxh5 36. Rg3 Qh2+ 37. Kf1 Qh1+ 38. Qxh1 Rxh1+ 39. Rg1 Rh3 40. Rd1 Rb8 41. Rd2 Rhb3 42. Rd4 Kf6 43. Re4 Rd3 44. Re6+ Kf5 45. Rg7 Rxd5 46. Re2 a5 47. Rf7+ Kg5 48. Rf3 Rdb5 49. Rd2 R8b6 50. Rfd3 Kf4 51. Rxd6 Rxd6 52. Rxd6 Rxb2 53. Kg2 Rb3 54. Rd4+ Ke5 55. Ra4 Rb5 56. Kg3 Kf5 57. f3 Rc5 58. Rd4 Rb5 59. Rh4 Kg6 60. Rc4 Kf5 61. Rc6 Rd5 62. Kf2 Rb5 63. Kg3 Rd5 64. a4 Kg5 65. Rc4 Kf5 66. Kf2 Rd3 67. Rh4 Kg6 68. Rg4+ Kf5 69. Kg3 Ra3 70. Rc4 Kg6 71. Kg4 Kf6 72. f4 Ra1 73. Kf3 Ke6 74. Ke4 Re1+ 75. Kd3 Rd1+ 76. Kc2 Rf1 77. Rd4 Rf3 {#d} 1/2-1/2

[Event "Portoroz Interzonal"] [Site "Portoroz"] [Round "20"] [White "Olafsson, Fridrik"] [Black "Sherwin, James T"] [Result "0-1"] [EventType "tourn"] [EventRounds "21"] [EventCountry "YUG"] [ECO "A17"] [Opening "English: Anglo-Indian, 2.Nc3 e6 3.Nf3 d5"] 1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. d4 c5 5. cxd5 Nxd5 6. e3 Nc6 7. Bd3 Be7 8. O-O O-O 9. a3 cxd4 10. exd4 Nf6 11. Bc2 a6 12. Qd3 b6 13. Bg5 g6 14. Rad1 Bb7 15. Rfe1 Re8 16. Bb3 b5 17. Bh6 b4 18. axb4 Nxb4 19. Qe2 Qb6 20. Ne5 Nbd5 21. Bc4 Rac8 22. Na4 Qa7 23. b3 Bb4 24. Qf3 Ba8 25. Re2 Nh5 26. Qg4 f5 27. Qh4 Be7 28. Qh3 Nhf4 29. Bxf4 Nxf4 30. Qe3 Nxe2+ 31. Qxe2 Bd5 32. Bxd5 exd5 33. Qf3 Red8 34. g4 Qb7 35. Nc5 Bxc5 36. dxc5 fxg4 37. Nxg4 Rf8 38. Qe3 Qg7 39. Rxd5 Rce8 40. Ne5 Rf5 41. f4 {#R} 0-1

[Event "Portoroz Interzonal"] [Site "Portoroz"] [Round "21"] [White "De Greif, Boris"] [Black "Olafsson, Fridrik"] [Result "0-1"] [EventType "tourn"] [EventRounds "21"] [EventCountry "YUG"] [ECO "E41"] [Opening "Nimzo-Indian: 4.e3 c5 5.Bd3"] 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. Nf3 b6 7. O-O Bb7 8. Bd2 d6 9. a3 Bxc3 10. Bxc3 Nbd7 11. Qe2 Qc7 12. Rfd1 e5 13. dxe5 dxe5 14. Bf5 Rfe8 15. Nd2 e4 16. Bxd7 Nxd7 17. Qg4 Ne5 18. Qg3 f6 19. Nf1 Qf7 20. Bxe5 Rxe5 21. b3 Rae8 22. a4 Bc8 23. h4 h6 24. Rd6 Kh7 25. Rad1 Qh5 26. R1d2 R8e7 27. Rd8 Bg4 28. Rf8 Bd7 29. Rd8 Be6 30. Qf4 Qf7 31. Nh2 Qg6 32. Nf1 Qf7 33. Nh2 g5 34. hxg5 hxg5 35. Qg3 Qh5 36. Rf8 Kg6 37. f4 exf3 38. Nxf3 Re4 39. Rdd8 Bf7 40. Rd6 R4e6 41. Rxe6 Rxe6 42. Qc7 Kg7 43. Ra8 Rxe3 44. Qd6 Re8 45. Rxa7 g4 46. Qd7 Kg8 47. Nh4 g3 48. Nf3 Qg6 49. Qd1 Qe4 50. Rd7 Qe3+ 51. Kh1 Kg7 52. Rd8 Qh6+ {#R} 0-1