[Event "iSchach - Duel"]
[Site "?"]
[Date "2015.11.22"]
[Round "2"]
[White "Supermondial B, Mephisto"]
[Black "Sphinx 50+, CGX."]
[Result "1/2-1/2"]
[ECO "D37"]
[WhiteElo "1883"]
[BlackElo "1880"]
[PlyCount "160"]
[EventDate "2015.??.??"]
[TimeControl "18000+30"]

1. c4 e6 2. Nc3 d5 3. Nf3 Nf6 4. d4 Be7 5. Bf4 O-O 6. e3 c5 7. dxc5 Bxc5 8.
cxd5 exd5 9. Be2 Nc6 10. O-O Be6 11. Rc1 {
Up till here both played out of my database} Qe7 (11... Rc8 12. a3 Be7 13. Nd4
$14) (11... Bb6 12. Qa4 Bd7 13. Rfd1 $14) 12. Na4 b6 $2 {Tries to get support
for the isolated pawn, but gets another disavantage instead (Nc6)} 13. Bg5 $16
Rfc8 14. Ba6 Rc7 15. Nxc5 bxc5 16. Bf4 Nb4 {Its only outcome} (16... Rd7 17.
Bb5 Rc8 18. Bxc6 Rxc6 19. Ne5 $18) 17. Bxc7 Qxc7 18. Qa4 Nxa6 19. Qxa6 $18 {
White has a rook for the bishop} Bg4 20. Nd2 Qb6 21. Qxb6 axb6 22. a3 d4 $2 {
Premature} (22... Nd7 23. h3 Bf5 24. Rfd1 Ne5 $18) 23. exd4 cxd4 {
-3.39 according to my chess engine} 24. Nc4 {not the best} b5 $18 25. Ne5 $2 {
Score drops about 2 pwan equivalents} (25. Nd2 Nd5 26. Rc5 Nf4 27. f3 Be6 $18)
25... Be2 26. Rfe1 d3 27. Ra1 Rc8 28. Rec1 $16 Re8 29. Nc6 d2 30. Rcb1 Kf8 31.
h4 $2 (31. Nd4 d1=Q+ 32. Rxd1 Bxd1 33. Rxd1 $18) 31... Re4 $11 {
And the chances are about equal.} 32. b3 $2 (32. f3 Rc4 33. Nb4 Rxh4 34. Kf2
d1=Q 35. Rxd1 Bxd1 36. Rxd1 Rc4 $14 {
and white still would have slight winning chances}) 32... Rxh4 (32... Nd5 $1
33. f3 Re8 34. Nd4 Nc3 35. Nxe2 Nxb1 36. Rxb1 Rxe2 37. Kf1 Re3 38. b4 Rxa3 39.
Ke2 $17) 33. a4 $4 (33. f3 Nd5 34. Rd1 Bxd1 35. Rxd1 Rh6 36. Rxd2 Rxc6 37. Rxd5
Ra6 $11) 33... bxa4 34. bxa4 (34. Rxa4 $4 Rxa4 35. bxa4 d1=R+ 36. Rxd1 Bxd1 $19
) 34... Nd7 (34... Rc4 $1 {This was the winning move series for black} 35. Ne5
Rd4 36. a5 d1=Q+ 37. Rxd1 Rxd1+ 38. Rxd1 Bxd1 $19) 35. f3 Rc4 36. Kf2 {
Only move to stay in the game !} (36. Nd8 $4 Rd4 $19) (36. Nb4 $4 Rd4 37. a5
d1=Q+ 38. Rxd1 Rxd1+ 39. Rxd1 Bxd1 40. a6 $19) 36... Bd3 37. Rb7 Rxc6 (37...
Bf5) 38. Rxd7 Rc1 39. Rxd3 Rxa1 40. Rxd2 Rxa4 $17 41. Ke3 Ke7 42. g3 f5 43. Kf2
h5 44. Rb2 Kf6 (44... f4 45. g4 (45. gxf4 Rxf4 46. Rb5 h4 $19) 45... hxg4 46.
fxg4 Ra5 47. Kf3 g5 $19 {And black has winning chances in this endgame}) 45.
Rb6+ Ke5 46. Rb5+ Ke6 47. Rb6+ Kf7 48. Rb7+ Kg6 49. Ke3 f4+ $2 {
Here black give away his "easy chances" for a win} (49... Ra3+ 50. Kf4 Kh6 51.
Rb6+ g6 52. Re6 Ra4+ 53. Ke3 Kg5 54. f4+ Kh6 $17) 50. gxf4 h4 51. Rb2 Kh6 52.
f5 Kg5 53. Rg2+ Kf6 54. Rg6+ Kf7 55. Rg5 Rb4 56. Rh5 Ke7 57. Rh7 Kf6 58. f4
Rb3+ 59. Ke4 h3 60. Rh5 Ra3 61. Rh8 Rg3 62. Rh5 Ke7 63. Kd5 Kf8 64. Ke6 Re3+
65. Kd5 Ke7 66. Kd4 Rb3 67. Kd5 Kf7 68. Ke5 Rg3 69. Rh7 Kg8 70. Rh4 Re3+ 71.
Kd4 Rb3 72. Kc4 Ra3 73. Kd4 Kf8 74. Rh8+ Kf7 75. Ke5 Rc3 76. Kd6 Re3 77. Kc5
Kf6 78. Kd4 Rf3 (78... Re7 {IS only possible way to deviate from useless moves}
79. Rxh3 Kxf5 80. Rh4 Re4+ 81. Kd3 g5 $19) 79. Ke4 Ra3 80. Rh5 Ke7 {Tobias Sugg
ested a draw, likely this is correct. Sooner or later repetition of moves
comes within their calculations , then maybe some strange decline of this
could initiate the final error ?} 1/2-1/2