Somewhat OT, a single decisive game in a 12 game corr match.

[Dann Corbit]

[Event "FICGS__CHESS__WORLD_CHAMPIONSHIP__000004"]
[Site "FICGS"]
[Date "2010.07.03"]
[Round "1"]
[White "Kotlyanskiy,Edward"]
[Black "Riccio,Eros"]
[Result "1/2-1/2"]
[WhiteElo "2565"]
[BlackElo "2477"]
[ECO "B90o"]
[Variation "Sicilian: Najdorf, 6.Be3 e5 7.Nb3 Be6 8.f3 Be7"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f3 e5 7. Nb3 Be6
8. Be3 Be7 9. Be2 O-O 10. O-O Nbd7 11. Nd5 Nxd5 12. exd5 Bf5 13. Qd2 Qc7
14. Rac1 a5 15. a4 Bg6 16. Bb5 f5 17. Nxa5 f4 18. Bf2 e4 19. fxe4 f3 20.
Nc4 fxg2 21. Rfe1 Nc5 22. e5 Ne4 23. Rxe4 Bxe4 24. Re1 Rxf2 25. Qxf2 Rf8
26. Qd2 Qc5+ 27. Qe3 Qxe3+ 28. Nxe3 Bh4 29. Re2 Bf3 30. Rd2 Be1 31. Rxg2
Bxg2 32. Kxg2 dxe5 33. d6 Rf2+ 34. Kg1 Rd2 35. Nc4 Rxc2 36. d7 Bh4 37.
Nd6 b6 38. b4 e4 39. Nxe4 Bd8 40. Nd6 Kf8 41. Nc4 Ke7 42. a5 1/2-1/2

[Event "FICGS__CHESS__WORLD_CHAMPIONSHIP__000004"]
[Site "FICGS"]
[Date "2010.07.03"]
[Round "2"]
[White "Riccio,Eros"]
[Black "Kotlyanskiy,Edward"]
[Result "1/2-1/2"]
[WhiteElo "2477"]
[BlackElo "2565"]
[ECO "D43j"]
[Variation "Semi-Slav: Moscow, 6.Bh4 Gambit, Main Line, 9...Bb7"]

1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. Nc3 e6 5. Bg5 h6 6. Bh4 dxc4 7. e4 g5 8.
Bg3 b5 9. Be2 Bb7 10. O-O Nbd7 11. Ne5 h5 12. Nxd7 Qxd7 13. Qc1 Rg8 14.
Rd1 Bb4 15. Be5 Qe7 16. a4 a6 17. d5 exd5 18. Bxf6 Qxf6 19. axb5 Bxc3
20. bxa6 Bxb2 21. axb7 Rb8 22. Ra8 Ke7 23. Qd2 c3 24. Qe3 d4 25. Rxd4 c2
26. e5 Qg6 27. Rxb8 Rxb8 28. Rc4 Rxb7 29. Qc5+ Ke8 30. Bf3 Re7 31. Qxc6+
Qxc6 32. Bxc6+ Kf8 33. Rxc2 Bxe5 34. g3 Rc7 1/2-1/2

[Event "FICGS__CHESS__WORLD_CHAMPIONSHIP__000004"]
[Site "FICGS"]
[Date "2010.07.03"]
[Round "3"]
[White "Kotlyanskiy,Edward"]
[Black "Riccio,Eros"]
[Result "1/2-1/2"]
[WhiteElo "2565"]
[BlackElo "2477"]
[ECO "B90r"]
[Opening "Sicilian: Najdorf, 6.Be3 e5 7.Nb3 Be6 8.f3 Be7 9.Qd2 O-O 10.O-O-O Nbd7"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be6
8. f3 Be7 9. Qd2 O-O 10. O-O-O Nbd7 11. g4 b5 12. g5 b4 13. Ne2 Ne8 14.
f4 a5 15. f5 a4 16. Nbd4 exd4 17. Nxd4 b3 18. Kb1 bxc2+ 19. Nxc2 Bb3 20.
axb3 axb3 21. Na3 Ne5 22. h4 Ra4 23. Bd4 Nf3 1/2-1/2

[Event "FICGS__CHESS__WORLD_CHAMPIONSHIP__000004"]
[Site "FICGS"]
[Date "2010.07.03"]
[Round "4"]
[White "Riccio,Eros"]
[Black "Kotlyanskiy,Edward"]
[Result "1/2-1/2"]
[WhiteElo "2477"]
[BlackElo "2565"]
[ECO "B97p"]
[Variation "Sicilian: Najdorf, Poisoned Pawn, 10.e5"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Qb6
8. Qd2 Qxb2 9. Rb1 Qa3 10. e5 h6 11. Bh4 dxe5 12. fxe5 g5 13. exf6 gxh4
14. Be2 Qa5 15. O-O Nd7 16. Kh1 Qg5 17. Rf4 e5 18. Nd5 exd4 19. Bf3 Bc5
20. Nc7+ 1/2-1/2

[Event "FICGS__CHESS__WORLD_CHAMPIONSHIP__000004"]
[Site "FICGS"]
[Date "2010.07.03"]
[Round "5"]
[White "Kotlyanskiy,Edward"]
[Black "Riccio,Eros"]
[Result "1/2-1/2"]
[WhiteElo "2565"]
[BlackElo "2477"]
[ECO "B90r"]
[Opening "Sicilian: Najdorf, 6.Be3 e5 7.Nb3 Be6 8.f3 Be7 9.Qd2 O-O 10.O-O-O Nbd7"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be6
8. f3 Be7 9. Qd2 O-O 10. O-O-O Nbd7 11. g4 b5 12. g5 b4 13. Ne2 Ne8 14.
f4 a5 15. f5 a4 16. Nbd4 exd4 17. Nxd4 b3 18. Kb1 bxc2+ 19. Nxc2 Bb3 20.
axb3 axb3 21. Na3 Ne5 22. Qg2 Qb8 23. Bf4 Ra4 24. f6 Bd8 25. Bxe5 dxe5
26. Bb5 Rxa3 27. bxa3 Nd6 28. Ba6 Qb6 29. Qe2 Bc7 30. Rd2 Qa5 31. Rc1
Nxe4 32. Rd7 Nc3+ 33. Rxc3 Qxc3 34. Bc4 Bb6 35. Qe4 Rd8 36. Bd3 g6 37.
Rxd8+ Bxd8 38. Qd5 Qd4 39. Qxd4 exd4 40. a4 1/2-1/2

[Event "FICGS__CHESS__WORLD_CHAMPIONSHIP__000004"]
[Site "FICGS"]
[Date "2010.07.03"]
[Round "6"]
[White "Riccio,Eros"]
[Black "Kotlyanskiy,Edward"]
[Result "1/2-1/2"]
[WhiteElo "2477"]
[BlackElo "2565"]
[ECO "B90r"]
[Opening "Sicilian: Najdorf, 6.Be3 e5 7.Nb3 Be6 8.f3 Be7 9.Qd2 O-O 10.O-O-O Nbd7"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f3 e5 7. Nb3 Be6
8. Be3 Be7 9. Qd2 O-O 10. O-O-O Nbd7 11. g4 b5 12. g5 b4 13. Ne2 Ne8 14.
f4 a5 15. f5 a4 16. Nbd4 exd4 17. Nxd4 b3 18. Kb1 bxc2+ 19. Nxc2 Bb3 20.
axb3 axb3 21. Na3 Ne5 22. Qg2 Qb8 23. Bf4 Kh8 24. h4 Qb7 25. Rh3 Ra4 26.
Re3 f6 27. Qe2 d5 28. gxf6 gxf6 29. Rxd5 Bxa3 30. bxa3 Rxa3 31. Bxe5
fxe5 32. Qb2 Ra8 33. Rxb3 Qa7 34. Rxe5 Nf6 35. Rd5 Qg1 36. Rd1 Qg4 37.
Rd4 Qg1 38. Rd1 1/2-1/2

[Event "FICGS__CHESS__WORLD_CHAMPIONSHIP__000004"]
[Site "FICGS"]
[Date "2010.07.03"]
[Round "7"]
[White "Kotlyanskiy,Edward"]
[Black "Riccio,Eros"]
[Result "1/2-1/2"]
[WhiteElo "2565"]
[BlackElo "2477"]
[ECO "B90r"]
[Opening "Sicilian: Najdorf, 6.Be3 e5 7.Nb3 Be6 8.f3 Be7 9.Qd2 O-O 10.O-O-O Nbd7"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be6
8. f3 Be7 9. Qd2 O-O 10. O-O-O Nbd7 11. g4 b5 12. g5 b4 13. Ne2 Ne8 14.
f4 a5 15. f5 a4 16. Nbd4 exd4 17. Nxd4 b3 18. Kb1 bxc2+ 19. Nxc2 Bb3 20.
axb3 axb3 21. Na3 Ne5 22. h4 Ra4 23. Rh3 Qa8 24. Qd5 Rxa3 25. bxa3 Qxa3
26. Qd2 Nf6 27. Bd4 Nfd7 28. Rc3 Nc5 29. Rxc5 Nf3 30. Qa5 Qa2+ 31. Qxa2
bxa2+ 1/2-1/2

[Event "FICGS__CHESS__WORLD_CHAMPIONSHIP__000004"]
[Site "FICGS"]
[Date "2010.07.03"]
[Round "8"]
[White "Riccio,Eros"]
[Black "Kotlyanskiy,Edward"]
[Result "1/2-1/2"]
[WhiteElo "2477"]
[BlackElo "2565"]
[ECO "B95l"]
[Variation "Sicilian: Najdorf, 6...e6 7.Qf3 h6"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. Qf3 h6
8. Be3 e5 9. Nb3 Be6 10. Nd5 Nbd7 11. c4 Bg4 12. Qg3 Nxd5 13. cxd5 Bh5
14. Bd3 Bg6 15. Bd2 Be7 16. O-O O-O 17. Rac1 Rc8 18. Qf3 Rxc1 19. Rxc1
Qb8 20. Qd1 Rc8 1/2-1/2

[Event "FICGS__CHESS__WORLD_CHAMPIONSHIP__000004"]
[Site "FICGS"]
[Date "2010.07.03"]
[Round "9"]
[White "Kotlyanskiy,Edward"]
[Black "Riccio,Eros"]
[Result "1/2-1/2"]
[WhiteElo "2565"]
[BlackElo "2477"]
[ECO "B90r"]
[Opening "Sicilian: Najdorf, 6.Be3 e5 7.Nb3 Be6 8.f3 Be7 9.Qd2 O-O 10.O-O-O Nbd7"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be6
8. Qd2 Be7 9. f3 O-O 10. O-O-O Nbd7 11. g4 b5 12. g5 b4 13. Ne2 Ne8 14.
f4 a5 15. f5 a4 16. Nbd4 exd4 17. Nxd4 b3 18. Kb1 bxc2+ 19. Nxc2 Bb3 20.
axb3 axb3 21. Na3 Ne5 22. h4 Ra4 23. Rh3 Qa8 24. Qd5 Rxa3 25. bxa3 Qxa3
26. Qd2 Nf6 27. Bd4 Nfd7 28. Rc3 Nc5 29. Rxc5 Nf3 30. Qa5 Qa2+ 31. Qxa2
bxa2+ 32. Kxa2 dxc5 33. Bf2 1/2-1/2

[Event "FICGS__CHESS__WORLD_CHAMPIONSHIP__000004"]
[Site "FICGS"]
[Date "2010.07.03"]
[Round "10"]
[White "Riccio,Eros"]
[Black "Kotlyanskiy,Edward"]
[Result "1/2-1/2"]
[WhiteElo "2477"]
[BlackElo "2565"]
[ECO "B90r"]
[Opening "Sicilian: Najdorf, 6.Be3 e5 7.Nb3 Be6 8.f3 Be7 9.Qd2 O-O 10.O-O-O Nbd7"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be6
8. Qd2 Be7 9. f3 O-O 10. O-O-O Nbd7 11. g4 b5 12. a3 Nb6 13. g5 Nh5 14.
Na5 Rc8 15. Kb1 g6 16. h4 Ng3 17. Rh2 Nxf1 18. Rxf1 Na4 19. Nxa4 bxa4
20. Rd1 Qc7 21. h5 d5 22. exd5 Bxd5 23. hxg6 Bxf3 24. gxh7+ Kh8 25. Rc1
Rb8 26. c4 Bxa3 27. Qe1 Be4+ 28. Ka2 Bb4 29. Qf2 Be7 30. Bd2 Bg6 31. Qg3
Rfe8 32. Re1 Bf8 33. Bc3 Bg7 34. Rhe2 Re6 35. Rxe5 Bc2 36. g6 Bxg6 37.
R1e3 Rxe5 38. Rxe5 Rf8 39. Qe1 Qd7 40. Rd5 Qh3 41. Bxg7+ Kxg7 42. Qd1
Rb8 43. Nc6 Qb3+ 44. Qxb3 Rxb3 45. h8=Q+ Kxh8 46. Ra5 Rb6 47. Ne5 Re6
48. Nxg6+ fxg6 49. Rxa4 Kg7 50. Kb3 g5 51. c5 Kf6 1/2-1/2

[Event "FICGS__CHESS__WORLD_CHAMPIONSHIP__000004"]
[Site "FICGS"]
[Date "2010.07.03"]
[Round "11"]
[White "Kotlyanskiy,Edward"]
[Black "Riccio,Eros"]
[Result "1/2-1/2"]
[WhiteElo "2565"]
[BlackElo "2477"]
[ECO "B90r"]
[Opening "Sicilian: Najdorf, 6.Be3 e5 7.Nb3 Be6 8.f3 Be7 9.Qd2 O-O 10.O-O-O Nbd7"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be6
8. f3 Be7 9. Qd2 O-O 10. O-O-O Nbd7 11. g4 b5 12. g5 b4 13. Ne2 Ne8 14.
f4 a5 15. f5 a4 16. Nbd4 exd4 17. Nxd4 b3 18. Kb1 bxc2+ 19. Nxc2 Bb3 20.
axb3 axb3 21. Na3 Ne5 22. Qg2 Qb8 23. Bf4 Ra4 24. f6 Bd8 25. Bxe5 dxe5
26. Bb5 Rxa3 27. bxa3 Nd6 28. Ba6 Qb6 29. Qe2 Bc7 30. Rd2 Qa5 31. Rc1
Nxe4 32. Rd7 Nc3+ 33. Rxc3 Qxc3 34. Bc4 Bb6 35. Qe4 Rd8 36. Bd3 g6 37.
Rxd8+ Bxd8 38. Qd5 Qd4 39. Qxd4 exd4 40. a4 h6 41. h4 hxg5 42. hxg5 Kf8
43. Kb2 Bc7 44. Bb5 Ba5 45. Kxb3 1/2-1/2

[Event "FICGS__CHESS__WORLD_CHAMPIONSHIP__000004"]
[Site "FICGS"]
[Date "2010.07.03"]
[Round "12"]
[White "Riccio,Eros"]
[Black "Kotlyanskiy,Edward"]
[Result "1-0"]
[WhiteElo "2477"]
[BlackElo "2565"]
[ECO "B90e"]
[Variation "Sicilian: Najdorf, Adams Attack"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. h3 e5 7. Nde2 h5
8. g3 Be6 9. Bg2 Nbd7 10. O-O Be7 11. Be3 Rc8 12. a4 O-O 13. a5 Re8 14.
Qd2 Rc7 15. f4 Bc4 16. Rfd1 Qc8 17. f5 d5 18. exd5 Bd6 19. Re1 Nc5 20.
g4 hxg4 21. hxg4 Nxg4 22. Ng3 Bb5 23. Bg5 Na4 24. Nce4 Bc5+ 25. Nxc5
Rxc5 26. Ne4 Rxc2 27. Qd1 Rxg2+ 28. Kxg2 Qxf5 29. Rxa4 f6 30. Bd2 Qh5
31. Rh1 Qg6 32. Ng3 f5 33. Rxg4 fxg4 34. Re1 Qf7 35. Bc3 Rf8 36. Qd2 1-0

[Kurt Utzinger]

An Elo difference of 68 points in corr games seems to be too less to give the stronger player the expected advantage.
Kurt