CCCC rounds 28, 29, 30 and 31. Leela draws Stockfish and wins in drawn position again!

It seems Leela is hiding something that is beyond us. How else can be explained that after Fizbo a 3325 CCRL Elo engine with endgame tablebases in a dead 4-men position lost to Leela, now Leela in another dead draw position made Xiphos, a 3200 CCRL Elo engines, to lose!
At round 29 there was the first loss in this tournament of one of the big 3, as Houdini with black lost to Ethereal!

ROUND 28
Andscacs lost to Stockfish and lost ground for the battle of 8th place but Ethereal and Booot lost to Komodo and Leela respectively so they did not took advantage of it so things remained the same.
Fire won against Ivanhoe so now it has a comfortable place inside top 8.

Leela playing with Booot a French defense(what else?) opening, she took a very easy win by playing simple Chess. She initially pushed all her Pawns, h4,f4,g4, in from of the castled King gaining all the space in Kingside and first thoughts were that she is planning an attack. But suddenly she forced the
exchange of Queens getting a huge Knight on d6 and from then on some almost forced trades have been made going to an endgame that as it seems it was almost lost for black since its King was too far away and white had a 3-2 Pawn majority on Queenside.

325 Stockfish vs Andscacs 1-0
326 Texel vs Shredder 1/2-1/2
327 Senpai vs Vajolet 0-1
328 Wasp vs Pedone 1/2-1/2
329 Nirvana vs Xiphos 0-1
330 Arasan vs Nemorino 1-0
331 Lco vs Booot 1-0
332 Crafty vs Laser 1-0
333 Komodo vs Ethereal 1-0
334 Fire vs Ivanhoe 1-0
335 Houdini vs Fizbo 1-0
336 Fritz vs Gull 1-0

[Event “CCCC 1: Rapid Rumble (15|5) Stage 1”] [Site “Chess.com”] [Date “2018.09.10”] [Round “?”] [White “Lc0 17.11089”] [Black “Booot 6.3.1”] [Result “1-0”] [ECO “C13”] [WhiteElo “3300”] [BlackElo “3226”] [PlyCount “217”] [EventDate “2018.??.??”] [EventType “rapid”] 1. d4 e6 2. e4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. h4 {Leela’s favorite move in this line.} h6 7. Bxe7 Qxe7 8. f4 O-O 9. g4 {It’s strange but this interesting move is not tried in human play. Possibly leaving white King so much open and with c5 ready to be played is thought as premature, but here white shows this is not a real issue.} c5 {The freeing move.} 10. dxc5 Qxc5 11. g5 {White has just developed a single piece only but black can’t really exploit this at this time.} Qb4 $1 {[%csl Rf4] Only move.} 12. Qd2 h5 {Of course.} 13. O-O-O Nc6 {And now probably white would try a Kingside attack with all these Pawns in front of the King as also the pieces behind them ready to develop an attack.} 14. Nb5 $1 {But Leela decides she wants to go to an endgame! Having the Kingside safe from anything and her King in the Queenside and the opponent’s King way far away and a huge Knight that will be established to d6, this was very clever thing to do.} Qxd2+ 15. Rxd2 Nc5 16. Nd6 Ne7 (16… Ne4 $2 17. Nxe4 dxe4 $16 {[%csl Ya2,Ga7,Yb2,Gb7,Yc2,Rc8,Re4] [%cal Rc8e6]}) 17. Ne2 a5 18. Bg2 Bd7 19. f5 $1 Nxf5 20. Nxf5 exf5 21. Bxd5 Be6 22. Rhd1 Rac8 23. b3 a4 24. Kb2 Bxd5 25. Rxd5 {[%csl Ya2,Ya4,Rb2,Yb3,Yb7,Yc2, Gd1,Gd5,Rg8][%cal Gd1d8] White has almost a won endgame now. Has a 3-2 Pawn majority in Queenside with its King to be there while the other in another galaxy and also a very strong double Rook battery in d-file.} Ne6 26. c4 Rfe8 27. Rf1 g6 28. Nf4 Nxf4 29. Rxf4 axb3 30. axb3 $16 Rc7 31. Rfd4 Rce7 32. Rb5 Ra8 33. Rd6 Rae8 {The only thing black can do is shuffle randomly its pieces waiting for the inevitable to happen.} 34. Kc3 Ra8 35. Rdb6 Ra7 36. Kd4 Kf8 37. b4 f4 38. Rf6 Ra1 39. Rxf4 Ke8 40. Re4 Kd8 41. Rb6 Rg1 42. Rf6 Kc7 43. e6 fxe6 44. Ke5 Kd7 45. Rxg6 b6 46. Rh6 Rf1 47. Rd4+ Kc7 48. Rf4 Rg1 49. Rxh5 Kd7 50. Rh6 Re1+ 51. Re4 Rf1 52. Rf6 Rb1 53. b5 Rg1 54. Rf8 Rh7 55. Ra8 Rf7 56. Ra7+ Ke8 57. Rxf7 Kxf7 58. Kd6 Rc1 59. h5 Kg7 60. Kxe6 Rh1 61. Kf5 Rf1+ 62. Rf4 Rd1 63. h6+ Kh7 64. Re4 Rf1+ 65. Kg4 Rg1+ 66. Kh5 Rh1+ 67. Kg4 Kg6 68. Re6+ Kf7 69. Rxb6 Rg1+ 70. Kf5 Rf1+ 71. Ke5 Re1+ 72. Kd5 Rd1+ 73. Kc5 Rg1 74. h7 Rxg5+ 75. Kd6 Kg7 76. c5 Kxh7 77. c6 Rg6+ 78. Ke5 Rg5+ 79. Kf6 Rg6+ 80. Kf5 Kh6 81. Rb8 Rg5+ 82. Kf6 Rg6+ 83. Ke5 Rg5+ 84. Kd6 Rg6+ 85. Kd5 Rg5+ 86. Ke6 Rg6+ 87. Kf5 Rg5+ 88. Kf6 Rg6+ 89. Ke5 Rg5+ 90. Kd4 Rg4+ 91. Kc5 Rg5+ 92. Kb6 Rg6 93. Re8 Kg7 94. Re1 Kf6 95. c7 Kf5+ 96. Kc5 Rg8 97. Kd5 Kf6 98. b6 Rg5+ 99. Kd6 Rg2 100. c8=Q Rd2+ 101. Kc7 Rc2+ 102. Kb8 Rxc8+ 103. Kxc8 Kf5 104. b7 Kf4 105. b8=Q+ Kf3 106. Qe5 Kg2 107. Re3 Kf1 108. Qb2 Kg1 109. Re1# 1-0

ROUND 29
Andscacs had a draw with Shredder and Stockfish won so after Komodo drew with Booot and Houdini lost, now Stockfish goes to the natural position of it, to the top!
So Houdini with black lost to Ethereal in a very interesting game, another French defense that had Houdini giving its Rook for a Knight for keeping white’s King in the center. It was a clever idea and Ethereal had to defend well after that, to secure his King. And Ethereal did defend excellently forcing the exchange of the Queens so his King felt more safe. After that Ethereal had a double Rooks + double Bishops + 3 Pawns against Rook + 2 Knights + Bishop + 5 Pawns of black. An interesting imbalance that Ethereal won masterfully because of the power of the double Rooks.
A very nice game to watch. So now only Komodo and Stockfish remain undefeated.

Leela with black against Xiphos was another crazy circus game because of how it ended. In a surprisingly peaceful Sicilian with 4.Qxd4, many exchanges happened early and by move 25 it was already seemed draw was unavoidable. Queens got exchanged too, with Xiphos preferring to give a Rook for a Bishop and a Pawn. A very safe move though, since the position was uncrackable by black and a dead draw.
Engines shuffled pointlessly and 50 move rule with a draw was approaching. But 5 moves before 50 move rule would declare as draw the game, Xiphos made a huge blunder giving a check that allowed the black King to invade into white’s position. Actually white would still hold the black King away, had not been a Rook move that caused a zugzwang situation that allowed its King to penetrate. Leela after the mistake won on the spot. It’s really inexplicable how Xiphos fell to that mistake. Was this a graph history interaction(GHI) issue? Was this a bug in Xiphos with 50 move rule or zugzwang detection? Its author will have to find out, even though with multithreading search reproducibility is never easy.

337 Andscacs vs Shredder 1/2-1/2
338 Stockfish vs Senpai 1-0
339 Pedone vs Texel 0-1
340 Vajolet vs Nirvana 0-1
341 Nemorino vs Wasp 0-1
342 Xiphos vs Lco 0-1
343 Laser vs Arasan 1/2-1/2
344 Booot vs Komodo 1/2-1/2
345 Ivanhoe vs Crafty 1-0
346 Ethereal vs Houdini 1-0
347 Gull vs Fire 0-1
348 Fizbo vs Fritz 1/2-1/2

[Event “CCCC 1: Rapid Rumble (15|5) Stage 1”] [Site “Chess.com”] [Date “2018.09.10”] [Round “?”] [White “Xiphos 0.3.17”] [Black “Lc0 17.11089”] [Result “0-1”] [ECO “B53”] [WhiteElo “3179”] [BlackElo “3123”] [PlyCount “322”] [EventDate “2018.??.??”] [EventType “rapid”] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nf6 5. c4 Nc6 6. Qd3 g6 7. Nc3 Bg7 8. Be2 Bg4 9. O-O Bxf3 10. Bxf3 Ne5 11. Qd1 Rc8 12. Be2 Nxc4 13. Qa4+ Qd7 14. Qxa7 O-O 15. Rd1 Qe6 16. f3 d5 17. Nxd5 Nxd5 18. Rxd5 Nxb2 19. Rb1 Qc6 20. Bxb2 Bxb2 21. Qe3 e6 22. Rdd1 Bf6 23. g3 Rfd8 24. Rxd8+ Rxd8 25. Kf1 {An dry position without too much play left.} Rc8 26. Kg2 h5 27. Kh3 Kg7 28. e5 Be7 29. f4 h4 30. Bf3 Qc2 31. Qb3 Qf2 32. Rb2 $1 Qf1+ 33. Bg2 Qc1 34. Rb1 Qc5 35. Qxb7 g5 36. Rc1 Qxc1 37. Qxe7 {White decided to give its Rook for Bishop +2 Pawns to clear up the mess with his King safety issues. Now he is absolutely safe.} hxg3 38. Qxg5+ Kf8 39. hxg3 Qc2 40. Bb7 Qh7+ 41. Kg4 Rb8 42. Bc6 Qg7 43. Qxg7+ Kxg7 { Game could essentially end up here. But never say never with Leela.} 44. a4 Rb3 45. f5 Rb4+ 46. Kg5 Rc4 47. Bb7 {[%csl Ra4] No real reason to give up the Pawn. Xiphos could have kept it without problems. Yet, even by giving it it still is a dead draw position as black has no way to break white’s position.} Rxa4 48. g4 Rc4 49. Bg2 Rb4 50. Bc6 Rd4 51. Bg2 Rc4 52. Bb7 Rc3 53. f6+ Kf8 54. Be4 Rc1 55. Bd3 Rd1 56. Be4 Rf1 57. Bd3 Rf2 58. Be4 Ke8 59. Ba8 Rf1 60. Be4 Rf2 61. Bc6+ Kf8 62. Be4 Kg8 63. Bd3 Rf3 64. Be4 Rf1 65. Bd3 Rf2 66. Be4 Kh8 67. Bb7 Kh7 68. Be4+ Kh8 69. Bd3 Rf3 70. Bb1 Rf1 71. Be4 Kg8 72. Bd3 Rf2 73. Be4 Kf8 74. Bc6 Rf1 75. Be4 Rf2 76. Bc6 Ra2 77. Kf4 Ra1 78. Kg5 Rc1 79. Be4 Rf1 80. Bb7 Kg8 81. Be4 Kh8 82. Bd3 Rd1 83. Be4 Kg8 84. Kf4 Rf1+ 85. Ke3 Ra1 86. Kf4 Kf8 87. Kg5 Rg1 88. Bf3 Re1 89. Kf4 Rf1 90. Ke3 Ra1 91. Kf4 Rf1 92. Ke3 Rb1 93. Ke4 Kg8 94. Ke3 Rg1 95. Kf4 Rf1 96. Ke3 Kh7 97. Bc6 Rc1 {Shuffling without any purpose till now, and in 5 moves there would be a 50 move rule draw if white didn’t move the g-Pawn. But now white plays the huge blunder Be4+?? giving up the game!} 98. Be4+ $4 Kh6 99. Kf4 {Seemingly the Pawn is safe but there is a nasty zugzwang now.} Rc4 {White has to lose g5-square and the game.} 100. Kf3 { And game is over. 0-1. How did Xiphos manage to lose that?} (100. g5+ Kh5 101. Kf3 Rxe4 102. Kxe4 (102. g6 Kxg6 103. Kxe4 Kg5 104. Ke3 Kf5 105. Kd4 Kf4 $19) 102… Kxg5 {[%csl Rf5]} 103. Ke3 Kf5 104. Kd4 Kf4 $19) 100… Kg5 101. Bb7 Rxg4 102. Bc6 Rf4+ 103. Ke3 Kf5 104. Ba8 Kxe5 105. Kd2 Rxf6 106. Ke3 Rg6 107. Kd3 Rg8 108. Bc6 f5 109. Bb7 Rb8 110. Bc6 Rf8 111. Bb5 Rf6 112. Ke3 Rf7 113. Be8 Rf8 114. Bd7 Rf6 115. Bb5 f4+ 116. Kd3 f3 117. Ke3 f2 118. Bf1 Kd5 119. Bg2+ Kc4 120. Bf1+ Kd5 121. Bg2+ Kc5 122. Bf1 Rf8 123. Ke4 Kd6 124. Ke3 Ke5 125. Kd3 Kf4 126. Ke2 Kg3 127. Kd3 Kf3 128. Be2+ Kf4 129. Bf1 e5 130. Ke2 Ke4 131. Bh3 Kd4 132. Bg2 e4 133. Bh3 Rf6 134. Bg2 e3 135. Bh3 Rf7 136. Bg2 Rf5 137. Bh3 Rf6 138. Bg2 Rf7 139. Bh3 Ra7 140. Kf3 Ra1 141. Ke2 Ke4 142. Bg2+ Kf4 143. Kd3 Rg1 144. Bh3 Rg8 145. Bf1 Kf3 146. Be2+ Kf4 147. Bf1 Rd8+ 148. Kc3 Ke4 149. Bg2+ Ke5 150. Bf1 Rd1 151. Be2 f1=Q 152. Bxf1 Rxf1 153. Kd3 Rf3 154. Kc3 Ke4 155. Kb4 Kd4 156. Kb5 Rf6 157. Kb4 e2 158. Kb3 e1=Q 159. Kb2 Kc4 160. Ka2 Rf2+ 161. Ka3 Qa1# 0-1

And the Ethereal-Houdini game:

[Event “CCCC 1: Rapid Rumble (15|5) Stage 1”] [Site “Chess.com”] [Date “2018.09.10”] [Round “?”] [White “Ethereal 10.88”] [Black “Houdini 6.03”] [Result “1-0”] [ECO “C11”] [WhiteElo “3283”] [BlackElo “3326”] [PlyCount “237”] [EventDate “2018.??.??”] [EventType “rapid”] 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Ne2 Be7 8. c3 O-O 9. Qc2 f6 10. a3 fxe5 11. fxe5 Bh4+ 12. Kd1 Rf7 13. Nf4 cxd4 14. Nxe6 Qe7 15. Neg5 Bxg5 16. Nxg5 Nf8 17. Nxf7 Qxf7 18. h3 Bd7 19. Bb5 dxc3 20. Rf1 Qh5+ 21. Be2 cxb2 22. Bxb2 Qh4 23. Qc5 Rd8 24. Qf2 Qe7 25. Ke1 Be6 26. Rd1 Bf7 27. Qe3 Ne6 28. Qg3 Nc5 29. e6 Nxe6 30. Bf6 Qd6 31. Rf3 Qxg3+ 32. Rxg3 Rd6 33. Rc1 Bg6 34. Bb2 Be4 35. a4 d4 36. Kf2 Ne5 37. Kg1 Bc6 38. Ba3 Rd8 39. Bd1 Bd5 40. a5 h6 41. Be7 Rd7 42. Bb4 Rd8 43. Bc2 Nc4 44. Bf5 Nf4 45. Bd3 Ne5 46. Bf1 Nh5 47. Ra3 a6 48. Bc5 Nc6 49. Rd1 Be4 50. Kh2 Nf6 51. Bd3 Kf7 52. Bb6 Rd6 53. Bxe4 Nxe4 54. Rad3 h5 55. Bxd4 Nxa5 56. Rf1+ Nf6 57. Bxf6 Rxd3 58. Bd8+ Ke6 59. Bxa5 g6 60. Rf8 Ra3 61. Bb6 Rb3 62. Bd4 Kd5 63. Bf6 Ke4 64. Be7 a5 65. Rf6 a4 66. Re6+ Kf5 67. Rf6+ Ke4 68. Rxg6 a3 69. Re6+ Kf5 70. Rf6+ Ke4 71. Rf8 a2 72. Bf6 Rb1 73. Ra8 Rf1 74. Bh8 Rf2 75. Kg3 Rc2 76. Rb8 h4+ 77. Kxh4 Rxg2 78. Rxb7 Rg6 79. Kh5 Ra6 80. Ba1 Kf4 81. Rb4+ Kf3 82. Rg4 Ra5+ 83. Rg5 Ra7 84. Rf5+ Kg3 85. h4 Ra4 86. Be5+ Kh3 87. Rf3+ Kg2 88. Rg3+ Kf2 89. Rg5 Rf4 90. Ba1 Ra4 91. Rg4 Ra5+ 92. Kh6 Kf3 93. Rg6 Ra3 94. h5 Ra5 95. Bf6 Kf2 96. Bd4+ Kf3 97. Bf6 Kf2 98. Bd4+ Kf3 99. Rg1 Rb5 100. Rg5 Rb6+ 101. Rg6 Rb5 102. Bg7 Ra5 103. Rg1 Ra6+ 104. Kg5 Kf2 105. Bd4+ Kf3 106. h6 Ra5+ 107. Kg6 Ra6+ 108. Bf6 Kf2 109. Rh1 Kf3 110. Rf1+ Ke4 111. Rd1 Ra3 112. h7 Rg3+ 113. Kh5 Rh3+ 114. Bh4 Rc3 115. h8=Q Rc5+ 116. Kg4 a1=Q 117. Qh7+ Rf5 118. Qxf5+ Ke3 119. Qd3# 1-0

ROUND 30
Andscacs got closer to top 8 since it won against Senpai while Ethereal had a draw with Fritz and Booot lost from Houdini.

Leela didn’t have a good game since after opening it ended up in a position where she didn’t have a clear target and didn’t managed to find a plan to create a specific target. In an almost equal position she has fallen again for a perpetual check tactic, a rather deep one this time, and 3 fold repetition draw occurred. As we mentioned other times in this blog, perpetual check detection is one of Leela’s weaknesses, but on the 2 previous times in this tournament this had happened the position was draw so Leela did not lose any points out of them. But in this game this may not be the case since while the position was equal, a different choice by Leela not falling into the trap, would mean the game will continue and who knows if Leela could turn the position in her favor.

349 Senpai vs Andscacs 0-1
350 Shredder vs Pedone 1/2-1/2
351 Nirvana vs Stockfish 0-1
352 Texel vs Nemorino 1-0
353 Lco vs Vajolet 1/2-1/2
354 Wasp vs Laser 0-1
355 Komodo vs Xiphos 1-0
356 Arasan vs Ivanhoe 1-0
357 Houdini vs Booot 1-0
358 Crafty vs Gull 0-1
359 Fritz vs Ethereal 1/2-1/2
360 Fire vs Fizbo 1-0

[Event “CCCC 1: Rapid Rumble (15|5) Stage 1”] [Site “Chess.com”] [Date “2018.09.11”] [Round “?”] [White “Lc0 17.11089”] [Black “Vajolet 2.6”] [Result “1/2-1/2”] [ECO “D13”] [WhiteElo “3300”] [BlackElo “3226”] [PlyCount “110”] [EventDate “2018.??.??”] [EventType “rapid”] 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. cxd5 cxd5 5. Nc3 Nc6 6. Bf4 a6 7. e3 Bg4 8. h3 Bxf3 9. Qxf3 Rc8 10. Rc1 e6 11. Bd3 h6 12. O-O Bd6 13. Na4 O-O 14. a3 Rc7 15. Rfd1 Re8 16. Bxd6 Qxd6 17. Qe2 e5 18. dxe5 Nxe5 19. Nc3 Qe6 20. Bb1 Rd7 21. Na4 Rdd8 22. Ba2 b5 23. Nc3 Rd7 24. Rd4 Red8 25. Qc2 Nc4 26. Rcd1 g6 27. a4 Qc6 28. Ne2 (28. axb5 {Would have been a little better.} axb5 29. Bb1 $1) 28… Qb6 29. Nf4 Kh7 30. axb5 axb5 31. Bb1 Ne5 32. Ba2 Nc4 33. Qc3 Rd6 34. Bb3 Kg8 35. Nd3 Ne4 36. Qc2 Qb7 37. Nf4 Nf6 38. Qb1 Kg7 39. Qc2 R6d7 40. Qc3 Kg8 41. Ba2 Rc8 42. Qc1 Rcc7 43. Qc3 Qa8 44. Bb1 Ne5 45. Qb3 $6 (45. Qd2 {If white wants to try for something this should have been played. Still very complicated to find some plan here for white.}) 45… Rc4 46. Nxd5 $6 {Leela falls for the perpetual draw. She misses the following tactic that is forced draw. This is a known problem of Leela to miss perpetual checks.} Nxd5 47. Be4 Rxd4 48. Rxd4 Qa1+ 49. Rd1 Qxd1+ $1 50. Qxd1 Nxe3 51. Qb3 Rd1+ 52. Kh2 Nf1+ 53. Kg1 Ne3+ 54. Kh2 Nf1+ 55. Kg1 Ne3+ 1/2-1/2

ROUND 31
While Shredder started the tournament with 9.5 points after 11 games with 8 wins, 3 draws and no losses, in the next 20 games it has 11 points out of 20 games with 3 wins 1 loss and 16 draws!! It has been transformed into a drawing machine. Here didn’t manage to win against Nemorino.

Leela had a big fight as she had with black to face Stockfish. Stockfish with white had 2 draws and 13 wins so far, no losses of course so Leela theoretically before the match would have one of the toughest games. Yet Leela playing a kind of anti-computer game managed to lock the position in a Sicilian opening and after that an never ending shuffling occurred that was more or less pointless as the result was determined already. A draw! In the end there were some nice fireworks for the uninitiated eye of humans, but these computers play on another level and both sides had everything under control.

Houdini and Komodo outplayed in the endgame Xiphos and Vajolet respectively and they won, so after Stockfish’s draw both big 3 are tied in points for the first place.

361 Andscacs vs Pedone 1-0
362 Senpai vs Nirvana 1/2-1/2
363 Nemorino vs Shredder 1/2-1/2
364 Stockfish vs Lco 1/2-1/2
365 Laser vs Texel 0-1
366 Vajolet vs Komodo 0-1
367 Ivanhoe vs Wasp 1/2-1/2
368 Xiphos vs Houdini 0-1
369 Gull vs Arasan 1/2-1/2
370 Booot vs Fritz
371 Fizbo vs Crafty
372 Ethereal vs Fire

[Event “CCCC 1: Rapid Rumble (15|5) Stage 1”] [Site “Chess.com”] [Date “2018.09.11”] [Round “?”] [White “Stockfish 220818”] [Black “Lc0 17.11089”] [Result “1/2-1/2”] [ECO “B90”] [WhiteElo “3439”] [BlackElo “3144”] [PlyCount “316”] [EventDate “2018.??.??”] [EventType “rapid”] 1. e4 c5 2. Nf3 d6 3. Nc3 a6 4. d4 cxd4 5. Nxd4 Nf6 6. h3 e5 7. Nde2 h5 $1 { Without opening book but Leela finds the best way to play against its mighty opponent. Being active is the key here. This h5 Pawn eventually locked the position.} 8. g3 Be7 9. Bg2 b5 10. Nd5 Nxd5 11. Qxd5 Ra7 12. Be3 Rb7 13. Qd2 Nd7 14. Nc3 Nf6 15. a3 Be6 16. f4 a5 $1 {Leela has the right idea. O-O would be a bit dangerous and a completely other game.} 17. f5 Bd7 18. Nd5 Nxd5 19. Qxd5 Qb8 20. O-O Rc7 21. c3 Rc4 22. Qd3 Qb7 23. Rfe1 Bc6 24. Bd2 a4 25. Rad1 h4 26. g4 Kd7 27. Kh2 Kc8 28. g5 f6 29. g6 $6 {Accepting a super closed position. Probably a bad idea for the best engine in these times.} Rd8 30. Bc1 Rh8 31. Re2 Rd8 32. Qf3 Rh8 33. Bd2 Qb8 34. Kh1 Bd8 35. Qd3 Bb6 36. Be3 Rd8 37. Red2 Kc7 38. Bxb6+ Qxb6 {Everything are locked now.} 39. Kh2 Qb7 40. Re2 Rd7 41. Qf3 Rd8 42. Re3 Qa8 43. Re2 Qb7 44. Re3 Qa8 45. Rd2 Rd7 46. Ree2 Rd8 47. Re1 Rd7 48. Ree2 Bb7 49. Rd1 Bc6 50. Kh1 Rd8 51. Rdd2 Rh8 52. Kh2 Rd8 53. Re1 Rd7 54. Qe3 Rd8 55. Kg1 Bb7 56. Bf3 Rh8 57. Kh2 Rd8 58. Bg2 Bc6 59. Qd3 Bb7 60. Qe2 Rd7 61. Kg1 Qh8 62. Qe3 Qa8 63. Kh2 Rd8 64. Qe2 Bc6 65. Qg4 Rh8 66. Qe2 Rd8 67. Qd1 Rd7 68. Qf3 Bb7 69. Qe3 Rd8 70. Bf3 Bc6 71. Kg1 Rh8 72. Rg2 Qb7 73. Rg4 Qb6 74. Qxb6+ Kxb6 75. Rd1 Kc5 76. Kf2 d5 77. exd5 Bd7 78. Be4 Kd6 79. Ke3 Rc7 80. Rd2 Rc4 81. Bd3 Rc5 82. Be4 Bc8 83. Rf2 Rh5 84. Kd2 Kc7 85. Rf3 Bd7 86. Ke3 Rh6 87. Rf2 Rh8 88. Rd2 Kd6 89. Rg1 Be8 90. Bd3 Rxd5 91. Rg4 Bd7 92. Rf2 Rh5 93. Bc2 Rc5 94. Rd2+ Ke7 95. Rf2 Kd6 96. Be4 Rh8 97. Bd3 Rh5 98. Be4 Kc7 99. Rg1 Kd8 100. Rd1 Ke7 101. Bf3 Rg5 {Leela traps her Rook voluntarily! But it’s still draw anyway.} 102. Bg4 Bc8 103. Rfd2 {[%csl Gd1,Gd2,Rf5][%cal Gd1d8,Rc8f5] Engines don’t have the sense of fear. Leela trapping her own Rook and white to acquire a double Rook battery seems scary but this is a dead draw and these engines don’t have any problems with this. f5-Pawn is weak right now so white does not have the time to try Rd8 or play on the Queenside forgetting the f-Pawn.} Rc6 {[%csl Rf5]} (103… Bxf5 $4 104. Bxf5 Rxf5 105. Rd7+ Ke8 106. Rd8+ Ke7 107. R1d7+ Ke6 108. Rd6+ Ke7 109. R8d7+ Ke8 110. Rxg7 $18 Rg5 111. Ra6 {[%cal Ga6a8]} Rg3+ 112. Kf2 Rd5 113. Raa7 {[%cal Gg7g8]} Rd2+ 114. Ke1 Kf8 115. Raf7+ Ke8 116. Rg8#) 104. Rf2 Rc5 105. Rfd2 Rc6 106. Rf1 Rc7 107. Rd3 Bb7 108. Rfd1 Bc8 109. Rf1 Rc4 110. Rd5 Bd7 111. Rfd1 Rc7 112. Rf1 Bc6 113. Rd2 Bd7 114. Rd3 Bc8 115. Rf2 Rc4 116. Rd5 Bd7 117. Rfd2 Rc7 118. Rf2 Bc6 119. Rd1 Bb7 120. Rfd2 Bc8 121. Rf2 Bb7 122. Rfd2 Bc8 123. Rf2 Bd7 124. Rd3 Rb7 125. Rdd2 Bc6 126. Rd3 Rc7 127. Rfd2 Bd7 128. Ke4 Bc6+ 129. Ke3 Rd7 130. Rxd7+ Bxd7 131. Ke4 Bc6+ 132. Kd3 Bd5 133. Ke3 Bc4 134. Ke4 Ba2 135. Ke3 Bb1 136. Rf2 Ba2 137. Rf3 Bd5 138. Rf2 Ba2 139. Rf3 Kd7 140. Rf2 Kc8 141. Rf1 Bd5 142. Rd1 Bg2 143. c4 bxc4 144. Rc1 Bd5 145. Rd1 Bc6 146. Rc1 Bb5 147. Ke4 Bc6+ 148. Ke3 Bb5 149. Ke4 Kd7 150. Kd5 Bc6+ 151. Kc5 Rxg4 {Nice way to end this.} 152. hxg4 Bg2 153. Rd1+ Ke7 154. Rd6 h3 155. Re6+ Kd7 156. Rd6+ Ke7 157. Re6+ Kd7 158. Rd6+ Ke7 1/2-1/2

_**

Standings after round 31 of 46.**_ First 8 go to next stage.

| Player | Score | (SB) | Ko | St | Ho | Lc | Fi | Sh | An | Et | Bo | Te |

Fr	Xi	Pe	Ar	Va	La	Gu	Wa	Fi	Ne	Iv	Se	Cr	Ni	+/-/=
—	—	—	—	—	—	—	—	—
1:	Komodo 2118.00	25.5 / 31	356.50	XX	=.	=.	=.	1.	1.	=.
=1	1=	1.	=.	=1	1.	=.	11	1=	=1	1.	11	1.	11	1.	1.
1.	(+20 -0 =11)
2:	Stockfish 220818	25.5 / 31	354.00	=.	XX	=.	==	=.	=.	=1
11	1=	1.	1.	=1	1.	=.	11	=.	1.	1.	1.	1.	1.	11

| 11| (+20 -0 =11)
3: | Houdini 6.03 | 25.5 / 31 | 349.75 | =. | =. | XX | =. | 1. | =. | 1. | =0 | =1 | 1. | 1. | 11 | 1. | 1. | =. | 1= | 11 | =. | 11 | 11 | 11 | 1. | 1. | 1.| (+21 -1 =9)
4: | Lc0 17.11089| 22.0 / 31 | 321.25 | =. | == | =. | XX | =. | =. | =. | 10 | =1 | 1. | 1. | 11 | =. | 1. | 1= | 1. | 1= | =. | =1 | =. | 11 | =. | =. | 1.| (+14 -1 =16)
5: | Fire 7.1 | 21.0 / 30 | 272.25 | 0. | =. | 0. | =. | XX | 0= | =. | 1. | =. | 1. | 1. | =. | 1= | 1. | =. | 1= | 11 | =. | =1 | 11 | =1 | 1. | 1. | 1.| (+15 -3 =12)
6: | Shredder 13 | 20.5 / 31 | 280.25 | 0. | =. | =. | =. | 1= | XX | 1= | =. | =. | 1= | =. | =. | == | 1= | =. | =. | 1. | == | =. | 1= | 1. | 1. | 11 | 1.| (+11 -1 =19)
7: | Andscacs 0.94 | 19.0 / 31 | 248.00 | =. | =0 | 0. | =. | =. | 0= | XX |
| =. | =1 | 0. | 0= | =1 | 1. | 11 | 1. | 1. | 1= | =. | 1. | =. | 11 | 1. | 1.| (+13 -6 =12)
8: | Ethereal 10.88 | 18.5 / 30 | 250.00 | =0 | 00 | =1 | 01 | 0. | =. | 1. | XX | =. | 0. | == | 1. | =. | 1. | =. | 1. | 1. | =. | =. | 1. | 1. | =1 | 1. | 11| (+13 -6 =11)
9: | Booot 6.3.1 | 18.5 / 31 | 240.00 | 0= | 0= | =0 | =0 | =. | =. | =. | =. | XX | 1. | == | =. | =. | =. | == | 1. | =. | 1. | =. | 1. | 1. | 11 | 1. | 11| (+10 -4 =17)
10: | Texel 1.07 | 17.5 / 31 | 205.00 | 0. | 0. | 0. | 0. | 0. | 0= | =0 | 1. | 0. | XX | 1. | =. | =1 | =1 | =. | =1 | =. | =1 | =. | 11 | =. | 1. | 11 | 1.| (+12 -8 =11)
11: | Fritz 16.10 | 16.5 / 31 | 215.25 | =. | 0. | 0. | 0. | 0. | =. | 1. | == | == | 0. | XX | =. | 1= | =. | 1. | == | =1 | 1. | == | == | == | =. | 1. | 1.| (+7 -5 =19)
12: | Xiphos 0.3.17 | 14.5 / 31 | 186.00 | =0 | =0 | 00 | 00 | =. | =. | 1= |
| =. | =. | =. | XX | =. | =. | 01 | =. | =. | =. | =. | 1. | 0. | 1= | 1. | 11| (+7 -9 =15)
13: | Pedone 1.8 | 14.5 / 31 | 180.00 | 0. | 0. | 0. | =. | 0= | == | =0 | =. | =. | =0 | 0= | =. | XX | == | =. | =. | =. | == | 1. | =. | =. | 1. | 11 | 1.| (+5 -7 =19)
14: | Arasan CCCC-2018 | 14.0 / 31 | 176.50 | =. | =. | 0. | 0. | 0. | 0= |
| 0. | =. | =0 | =. | =. | == | XX | =. | == | == | 1= | 1. | 01 | 01 | =. | 1. | 1.| (+6 -9 =16)
15: | Vajolet 2.6 | 14.0 / 31 | 170.25 | 00 | 00 | =. | 0= | =. | =. | 00 | =. | == | =. | 0. | 10 | =. | =. | XX | 1. | =. | =. | =. | 0. | =. | 11 | 1. | 11| (+7 -10 =14)
16: | Laser 1.6 | 12.5 / 31 | 167.25 | 0= | =. | 0= | 0. | 0= | =. | 0. | 0. | 0. | =0 | == | =. | =. | == | 0. | XX | =. | =1 | =. | 1. | 0. | 1. | 10 | 1.| (+5 -11 =15)
17: | Gull 3.syz | 12.5 / 31 | 143.50 | =0 | 0. | 00 | 0= | 00 | 0. | 0. | 0. | =. | =. | =0 | =. | =. | == | =. | =. | XX | 1. | =. | =. | 1. | 1. | 11 | ==| (+5 -11 =15)
18: | Wasp 3.25 | 11.5 / 31 | 161.00 | 0. | 0. | =. | =. | =. | == | 0= | =. | 0. | =0 | 0. | =. | == | 0= | =. | =0 | 0. | XX | =. | =1 | 0= | 1. | =. | =.| (+2 -10 =19)
19: | Fizbo 1.9 | 11.0 / 30 | 142.75 | 00 | 0. | 00 | =0 | =0 | =. | =. | =. | =. | =. | == | =. | 0. | 0. | =. | =. | =. | =. | XX | =. | =. | == | 1. | ==| (+1 -9 =20)
20: | Nemorino 5.00 | 10.5 / 31 | 117.75 | 0. | 0. | 00 | =. | 00 | 0= | 0. |
| 0. | 00 | == | 0. | =. | 10 | 1. | 0. | =. | =0 | =. | XX | 1. | 1. | =1 | 1.| (+6 -16 =9)
21: | Ivanhoe 999946h | 10.0 / 31 | 130.00 | 00 | 0. | 00 | 00 | =0 | 0. | =. | 0. | 0. | =. | == | 1. | =. | 10 | =. | 1. | 0. | 1= | =. | 0. | XX | 0. | =1 | 0.| (+5 -16 =10)
22: | Senpai 2.0 | 6.0 / 31 | 70.50 | 0. | 00 | 0. | =. | 0. | 0. | 00 | =0 | 00 | 0. | =. | 0= | 0. | =. | 00 | 0. | 0. | 0. | == | 0. | 1. | XX | =. | ==| (+1 -20 =10)
23: | Crafty 25.2 | 4.5 / 30 | 47.00 | 0. | 0. | 0. | =. | 0. | 00 | 0. | 0. | 0. | 00 | 0. | 0. | 00 | 0. | 0. | 01 | 00 | =. | 0. | =0 | =0 | =. | XX | 1.| (+2 -23 =5)
24: | Nirvana 2.4 | 4.5 / 31 | 45.25 | 0. | 00 | 0. | 0. | 0. | 0. | 0. | 00 | 00 | 0. | 0. | 00 | 0. | 0. | 00 | 0. | == | =. | == | 0. | 1. | == | 0. | XX| (+1 -23 =7)

_ Rating performance so far after round 31 (2 games haven’t been played yet) :_

Rank Name               Elo    +    - games score oppo. draws   
   1 Stockfish 220818   502  113  100    31   82%   264   35%   
   2 Houdini 6.03       500  116  102    31   82%   262   29%   
   3 Komodo 2118.00     496  113  100    31   82%   265   35%   
   4 Lc0 17.11089       399   97   92    31   69%   276   55%   
   5 Fire 7.1           395  102   95    30   70%   262   40%   
   6 Shredder 13        368   93   89    31   66%   264   61%   
   7 Ethereal 10.88     363  102   98    30   62%   284   37%   
   8 Andscacs 0.94      356   98   94    31   61%   274   39%   
   9 Booot 6.3.1        349   93   90    31   60%   283   55%   
  10 Texel 1.07         300   96   94    31   56%   263   35%   
  11 Fritz 16.10        283   90   89    31   53%   268   61%   
  12 Xiphos 0.3.17      272   93   95    31   47%   288   48%   
  13 Pedone 1.8         263   88   89    31   47%   275   61%   
  14 Vajolet 2.6        261   93   94    31   45%   284   45%   
  15 Arasan CCCC-2018   244   91   92    31   45%   268   52%   
  16 Laser 1.6          236   93   95    31   40%   284   48%   
  17 Gull 3.syz         231   92   94    31   42%   281   52%   
  18 Wasp 3.25          206   89   92    31   37%   275   61%   
  19 Fizbo 1.9          199   90   94    30   37%   286   67%   
  20 Nemorino 5.00      170   98  104    31   34%   282   29%   
  21 Ivanhoe 999946h    165   98  105    31   32%   290   32%   
  22 Senpai 2.0          61  102  115    31   19%   286   32%   
  23 Nirvana 2.4          8  108  128    31   15%   286   23%   
  24 Crafty 25.2          0  111  134    30   15%   279   17%

**This is with Lc0 - Gull game counted as draw. Since this is a rating list the real result should be counted, as the CCCC result by their rules because Gull crashed, was 1-0 in favor of Lc0.