Arasan games in WCRCC 2017

[jdart]

I have posted a few general comments and issues on my blog:

https://arasanchess.org/blog.shtml

Regarding the games: I haven't done a deep analysis but following is a recap and some brief comments.

The first round Arasan had Black matched with zurichess. Arasan equalized out of the opening, later won a pawn, and put a nice positional squeeze on zurichess to win the game.

The next game was with Wasp. The opening was a fairly boring Semi-Slav. Arasan built up some advantage but something went very strange. Between moves 36 and 59, Arasan's score went up to over +3, which does not seem justified. Then it abruptly started dropping, again for no discernible good reason. At move 74 suddenly it dropped again, to -2.85, and stayed there for the rest of the game. That looks like a bug. Note that as described in the blog, Arasan's effective contempt factor was wrong for this and the other games in day 1, but the other games didn't have weird scores like this.

3rd round was Black against Tinker. Arasan got nothing from the opening and quickly drew. Qxc4 here was an error according to the Hiarcs book:

[d] r1b2rk1/2qnbppp/pp1p1n2/4p3/P1Q1P3/2N1BN2/1PP1BPPP/R4RK1 b - - 0 12

but that is what most engines seem to want to play.

4th round was against The Baron. The opening was a Catalan. Arasan's scores soon started dropping a bit, but Stockfish thinks it was never in any danger and it soon converted into an equal endgame, which was drawn.

5th round game was with Telepath. Telepath played a Gruenfeld variant. Stockfish thinks it went wrong here:

[d] r2qr1k1/pNn2p1p/2p3p1/3p4/1PP5/b3PQ1P/4BPP1/3R1RK1 b - - 0 17

by playing Qb8 instead of Qd7. But Black was still in the game and had an outside passer. However, that passer was later lost and then it had to play a pawn-down endgame with no compensation, and lost.

6th round Arasan had a bye. 7th round was against Nightmare and was another short draw. The contempt issue was probably a factor here, I think. Arasan might have not played so readily into a draw if its rating had been accurate.

Next round Arasan was matched with Komodo. Komodo played the French but Arasan avoided the interesting variation it had tried against some other programs (1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be3 Rb8). Arasan went instead for 4. Bg5. It it was equal coming out of the opening and actually did not seem to go wrong until move 32:

[d] 2r2rk1/2b2p1p/2b1p1p1/2NnR3/3P4/1P1B4/2K2PPP/2Q5 w - - 0 32

Here Arasan played Re2, which runs into Nf4 (better was Re1). Arasan hung on but it wound up with four isolated pawns, and gradually succumbed.

On Sunday Arasan was first matched with Goldbar and that game was a very boring QGD. Arasan drifted into being somewhat worse. For a long time there was a lot of shuffling around, with this position at move 51 being typical:

[d] 1r6/p3rb1R/B1pn1kp1/1pNp1p2/3P1P2/PP2PP2/3K4/R7 w - - 0 51

White has managed to get the Bishop trapped, but Black can't actually take it because it is defended. And in turn Black's bishop has almost no mobility. I thought Arasan was worse but it is hard to see how either side can make progress from here.

Eventually the position became less locked but simplifications took it into an equal endgame, which was drawn after over 150 moves.

Next round Arasan was matched with gogobello, I think a new Italian engine. gogobello played an inferior line of the Najorf Poisioned Pawn (with 10. Be2) and was crushed.

Round 11 Arasan had White against DeltomateX. After a completely equal opening, Stockfish thinks Deltomate went wrong here:

[d] 2r1r1k1/pp3p1p/5p2/8/3QP3/5PPb/1P2B2P/6K1 b - - 0 30

Deltomate had to play .. Kg7 but instead went for Rc2. And although that looks like a reasonable move, Arasan was soon able to mount a winning attack on the king side.

Round 12 Arasan was matched with Chiron and was doing worse for most of the game, eventually defending a pawn-down endgame. As mentioned in the blog Arasan disconnected twice in the endgame due to program crashes. I am still not certain what the issue is, but looks like it may be related to tb access. I switched to a dual Xeon Linux system for the remainder of the game and it was able to draw. This was a good result because Chiron was running on 30 cores and is a strong program.

The last round Arasan won against BertaX. Berta played the Ruy Lopez Berlin. Arasan was able to break through on the Queen side, creating a passed pawn, and later a couple more.

I think the key position is here:

[d] 8/bpp1kr2/p1p1p1np/P3P1p1/1P4R1/5NPP/1BP2PK1/8 b - - 0 28

where Deltomate played Rf5. Correct is Rf8, because the Rook is needed on the back rank for defense against the White passers. Another example where one missing tempo is everything.

games:

[pgn]
[Event "11th Annual WCRCC"]
[Site "chessclub.com"]
[Date "2017.06.24"]
[Round "1"]
[White "zurichess"]
[Black "Arasan v20.1.0-46-ge836015"]
[Result "0-1"]
[ECO "E15"]
[WhiteElo "2188"]
[BlackElo "2398"]
[TimeControl "1500+4"]

1. c4 Nf6 2. d4 e6 3. Nf3 b6 4. g3 Ba6 5. Nbd2 Bb4 6. Qb3 c5 7. Bg2
Nc6 8. dxc5 bxc5 9. a3 Bxd2+ 10. Bxd2 O-O 11. Qc2 d5 12. cxd5 Qxd5
13. Rc1 Nd4 14. Qxc5 Nb3 15. Qxd5 Nxd5 16. Rc6 Bb5 17. Rc2 Rac8
18. Bc3 Rc7 19. O-O Rfc8 20. Rb1 g6 21. Bf1 Ba4 22. h4 Nxc3 23. bxc3
Kg7 24. c4 Rxc4 25. Rcb2 Rc3 26. Ne5 R8c5 27. Nf3 h6 28. Bg2 Nc1
29. Bf1 a5 30. Rb7 Bc6 31. Rc7 e5 32. Re7 Nxe2+ 33. Bxe2 Bxf3
34. Bxf3 Rxf3 35. Kg2 Rf5 36. Rb2 Rc3 37. Ra2 Rc4 38. Re2 Kf6 39. Re8
Rc3 40. Ra2 Rc4 41. Re2 h5 42. Rb2 e4 43. Rg8 Re5 44. Ra8 Kg7
45. Rab8 Rd5 46. Re8 Rd3 47. Ra2 Ra4 48. Kf1 Rdxa3 49. Rxa3 Rxa3
50. Rxe4 a4 51. Ke1 Ra2 52. Rd4 Kf6 53. Rf4+ Ke7 54. Kd1 Ke6 55. Kc1
a3 56. Rf3 f6 57. Re3+ Kf5 58. Rf3+ Ke5 59. Re3+ Kd4 60. Rf3 Re2
61. Kb1 a2+ 62. Ka1 Ke5 63. Rf4 f5 64. Rf3 Kf6 65. Rf4 Rc2 66. Rf3
Rd2 67. Rf4 g5 68. Rc4 g4 69. Rf4 Ke5 70. f3 Rd4 71. fxg4 Rxf4
72. gxf4+ Kxf4 73. gxh5 Ke5 74. h6 Kf6 75. Kb2 a1=Q+ 76. Kxa1 f4
77. Kb2 f3 78. h5 f2 79. h7 Kg7 80. h8=Q+ Kxh8 81. Kb3 f1=Q 82. Kc3
Qe2 83. Kb4 Qc2 84. Kb5 Kh7 85. Kb6 Qc4 86. h6 Qb4+ 87. Kc6 Kxh6
88. Kd5 Kg5 89. Kc6 Qa5 90. Kb7 Qb5+ 91. Kc7 Kg6 92. Kc8 Kf6 93. Kc7
Ke6 94. Kc8 Kd6 95. Kd8 Qd7# 0-1 {zurichess checkmated}
[Event "11th Annual WCRCC"]
[Site "chessclub.com"]
[Date "2017.06.24"]
[Round "2"]
[White "Arasan v20.1.0-46-ge836015"]
[Black "WaspX"]
[Result "1/2-1/2"]
[ECO "D43"]
[WhiteElo "2398"]
[BlackElo "1400"]
[TimeControl "1500+4"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 h6 6. Bxf6 Qxf6 7. e3
Nd7 8. Bd3 dxc4 9. Bxc4 g6 10. O-O Bg7 11. a4 a5 12. Qe2 Qe7 13. e4
b6 14. e5 O-O 15. h3 Bb7 16. Rad1 Rad8 17. Rfe1 Qb4 18. Rd2 Rb8
19. Ba6 Ba8 20. Bd3 Rfd8 21. Red1 Rbc8 22. Be4 Bb7 23. h4 Qe7 24. Qe3
Nf8 25. Bc2 c5 26. d5 exd5 27. Nxd5 Bxd5 28. Rxd5 Rxd5 29. Rxd5 Rd8
30. Bb3 Rxd5 31. Bxd5 Kh8 32. Bc4 Kg8 33. Qe4 Qd7 34. g3 Ne6 35. b3
Kf8 36. Kg2 Kg8 37. h5 gxh5 38. Qf5 Qe8 39. Kh2 Ng5 40. Nxg5 hxg5
41. f4 gxf4 42. gxf4 h4 43. Kh3 Qe7 44. e6 Kf8 45. exf7 Qe3+ 46. Kxh4
Qf2+ 47. Kg5 Qg3+ 48. Qg4 Qxg4+ 49. Kxg4 Bd4 50. Kf3 Ke7 51. Ke4 Bh8
52. f5 Bd4 53. Be6 Bc3 54. Kd5 Bd4 55. Kc6 c4 56. Bxc4 Bc5 57. Bd5
Bd4 58. b4 Be3 59. b5 Bg1 60. Bb3 Bc5 61. Kd5 Kxf7 62. Ke5+ Ke8
63. Ba2 Bg1 64. Ke6 Bh2 65. Bd5 Bf4 66. f6 Kf8 67. Kf5 Bd6 68. Bg2
Kf7 69. Bd5+ Kf8 70. Ba2 Bc5 71. Kg4 Bb4 72. Bb3 Bc3 73. Kf5 Ke8
74. Kg5 Kd7 75. Kg6 Kd6 76. f7 Ke7 77. Kf5 Bh8 78. Ke4 Bc3 79. f8=Q+
Kxf8 80. Kd3 Ba1 81. Kc4 Ke7 82. Kd3 Kd6 83. Ke2 Kc5 84. Be6 Kb4
85. Kd1 Kxa4 86. Bc4 Kb4 87. Bf1 Be5 88. Kc1 a4 89. Kb1 Kb3 90. Be2
Bf4 91. Bd1+ Kb4 92. Be2 Be5 93. Ka2 Bf6 94. Bd3 Be5 95. Be2 a3
96. Bf3 Bb2 97. Be2 Be5 98. Bf3 Bd6 99. Be2 Bf4 100. Bf3 Be5 101. Be4
Bd6 102. Bd3 Be5 103. Bb1 Bh8 104. Bc2 Bd4 105. Bb1 Bh8 106. Bf5 Bd4
107. Bb1 Bc3 108. Be4 Bb2 109. Bd3 Bc1 110. Bf1 Be3 111. Be2 Bf4
112. Bf3 Bd6 113. Be2 Bc5 114. Ka1 Be3 115. Ka2 Bc5 116. Ka1 Kb3
117. Bd1+ Kc4 118. Be2+ Kb4 119. Ka2 Be3 120. Bf3 Bc5 121. Bc6 Bf2
122. Bd7 Bg1 123. Bh3 Bc5 124. Bf1 Bf8 125. Bd3 Bc5 126. Bf1 Bd4
127. Be2 Be3 128. Bg4 Bd2 129. Bf5 Bc3 130. Be4 Bb2 131. Bd3 Be5
132. Bf5 Bd6 133. Bd7 Bf8 134. Be8 Be7 135. Bd7 Bc5 136. Bc6 Be3
137. Be8 Bd4 138. Bh5 Bh8 139. Bg6 Be5 140. Bb1 Bd6 141. Bd3 Bh2
142. Bf1 Bg1 143. Bd3 Bf2 144. Bh7 Be3 145. Bb1 Kxb5 146. Kxa3 Kc5
147. Ka4 Bd4 148. Ka3 Be5 149. Ka4 Bd4 150. Ka3 Be5 151. Bd3 Bh8
152. Bb1 Bd4 153. Bd3 Bf6 154. Bb1 Bh4 155. Kb2 Kb4 156. Kc1 Kc3
157. Be4 b5 158. Kb1 Bf6 159. Bc6 b4 160. Ba4 Be5 161. Ka1 Bf4
162. Kb1 Bg5 163. Ka2 Bf4 164. Ka1 Bg5 165. Kb1 Be3 166. Ka1 Bf4
167. Bb5 b3 168. Ba4 b2+ 169. Kb1 Be5 170. Ka2 Bg3 171. Kb1 Be5
172. Be8 Kb3 173. Bg6 Kc3 174. Be8 Bf6 175. Bf7 Be7 176. Bh5 Bc5
177. Be8 Bb6 178. Bf7 Bc7 179. Bh5 Bf4 180. Be8 Bg5 181. Bf7 Bf4
182. Bh5 Bd2 183. Be8 Bf4 184. Bf7 Bg3 185. Bh5 Kb3 186. Bg4 Be5
187. Bd1+ Kc3 188. Bh5 Kb3 189. Bg4 Bd4 190. Bd1+ Kc4 191. Ka2 Kc3
192. Ba4 Bf2 193. Bb5 Kc2 194. Bd3+ Kc1 195. Be4 Be3 196. Bd3 Bf2
197. Be4 Bb6 198. Bd3 Bg1 199. Be4 Bd4 200. Bd3 Bh8 201. Be4 Be5
202. Bd3 Bd6 203. Be4 Be5 204. Bd3 Kd2 205. Bb1 Kc3 206. Ka3 Bd4
207. Be4 Bb6 208. Bd3 Bc5+ 209. Ka2 Bb4 210. Bc2 Kxc2
1/2-1/2 {ArasanX stalemated}
[Event "11th Annual WCRCC"]
[Site "chessclub.com"]
[Date "2017.06.24"]
[Round "3"]
[White "Tinker"]
[Black "Arasan v20.1.0-46-ge836015"]
[Result "1/2-1/2"]
[ECO "B90"]
[WhiteElo "2285"]
[BlackElo "2398"]
[TimeControl "1500+4"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nf3
Qc7 8. a4 Be7 9. Be2 O-O 10. O-O b6 11. Qd3 Nbd7 12. Qc4 Qxc4
13. Bxc4 Bb7 14. Nd2 Ng4 15. Bb3 Nxe3 16. fxe3 Nf6 17. Nc4 Nxe4
18. Nxb6 Rad8 19. Nbd5 Bxd5 20. Bxd5 Nf6 21. Bc4 d5 22. Bxa6 Bc5
23. Nd1 Rd6 24. Bb5 Ng4 25. Re1 f5 26. Kh1 f4 27. exf4 Nxh2 28. Kxh2
Rh6+ 29. Kg3 Rg6+ 30. Kh3 Rh6+ 31. Kg3 Rg6+ 32. Kh2 Rh6+ 33. Kg3
1/2-1/2 {Game drawn by repetition}
[Event "11th Annual WCRCC"]
[Site "chessclub.com"]
[Date "2017.06.24"]
[Round "4"]
[White "TheBaron"]
[Black "Arasan v20.1.0-46-ge836015"]
[Result "1/2-1/2"]
[ECO "E04"]
[WhiteElo "2606"]
[BlackElo "2398"]
[TimeControl "1500+4"]

1. Nf3 Nf6 2. c4 e6 3. g3 d5 4. d4 dxc4 5. Bg2 c5 6. O-O Nc6 7. dxc5
Qxd1 8. Rxd1 Bxc5 9. Nbd2 c3 10. bxc3 O-O 11. Ne1 Be7 12. Rb1 Nd5
13. Bb2 Nb6 14. Nd3 Rd8 15. c4 f6 16. Ba1 Na4 17. Ne4 Na5 18. c5 Bd7
19. Nd6 Bc6 20. Bxc6 bxc6 21. Ne4 Rab8 22. Rxb8 Rxb8 23. Kg2 Rb5
24. Rc1 Nb7 25. Nd6 Nxd6 26. cxd6 Bxd6 27. Rxc6 Rb6 28. Rc8+ Kf7
29. Bd4 Ra6 30. Ra8 e5 31. Rxa7+ Rxa7 32. Bxa7 Nc3 33. Nc5 Bxc5
34. Bxc5 Nxa2 35. Kf3 Nc3 36. e4 g5 37. g4 Nb5 38. Ke3 Kg7 39. Bb6
Nd6 40. Kd3 Nf7 41. Kc4 Nh8 42. f3 Kf8 43. Bf2 Ng6 44. Bc5+ Kg7
45. Kd3 Nf4+ 46. Ke3 Kf7 47. Kd2 Kg7 48. Ke3 Ne6 49. Bb6 Nf4 50. Bc5
1/2-1/2 {Game drawn by repetition}
[Event "11th Annual WCRCC"]
[Site "chessclub.com"]
[Date "2017.06.24"]
[Round "5"]
[White "Arasan v20.1.0-46-ge836015"]
[Black "Telepath"]
[Result "1-0"]
[ECO "D94"]
[WhiteElo "2398"]
[BlackElo "2285"]
[TimeControl "1500+4"]

1. Nf3 g6 2. d4 Bg7 3. c4 Nf6 4. Nc3 d5 5. e3 O-O 6. b4 c6 7. Bb2 Bg4
8. h3 Bxf3 9. Qxf3 Na6 10. a3 Nc7 11. Be2 Re8 12. O-O e5 13. dxe5 Ne4
14. Rad1 Bxe5 15. Nxe4 Bxb2 16. Nc5 Bxa3 17. Nxb7 Qb8 18. Na5 Qb6
19. Rb1 Bxb4 20. Nxc6 Qxc6 21. Rxb4 a5 22. cxd5 Qxd5 23. Rb7 Qxf3
24. Bxf3 Ne6 25. Ra1 Ra6 26. Rb2 a4 27. Bb7 Rb8 28. Bxa6 Rxb2
29. Rxa4 Nc5 30. Ra5 Rc2 31. g4 Kg7 32. Bf1 h5 33. gxh5 gxh5 34. Ra7
Kg6 35. h4 Rd2 36. Bb5 f6 37. Bc6 Rd6 38. Rc7 Ne6 39. Rc8 Rd8
40. Be4+ f5 41. Rxd8 Nxd8 42. Bd5 f4 43. Kg2 fxe3 44. fxe3 Kf5
45. Kf3 Ke5 46. e4 Kf6 47. Kf4 Kg6 48. Ke5 Kg7 49. Kd6 Kf6 50. Kd7
Nf7 51. Bxf7 Kxf7 52. Kd6 Kg6 53. Kc5 Kf7 54. Kb4 Kf6 55. Kc3 Ke7
56. Kb2 Ke6 57. Kc2 Ke5 58. Kd3 Kd6 59. Kc2 Ke5 60. Kd3 Kd6 61. Kd4
Ke6 62. e5 Kf7 63. Kc3 Ke6 64. Kd4 Kf7 65. Kd5 Ke7 66. e6 Ke8 67. Kc4
Ke7 68. Kd5 Ke8 69. Ke5 Ke7 70. Kf5 Kd6 71. Kf6 Kc6 72. e7 Kd7
73. Kf7 Kd6 74. e8=R Kd5 75. Rh8 Ke5 76. Rxh5+ Ke4 77. Ra5 Kd4
78. Ra8 Kc5 79. h5 Kb6 80. h6 Kb7 81. Ra3 Kc6 82. h7 Kb5 83. h8=Q Kc6
84. Qc8+ Kd6 85. Rd3+ Ke5 86. Qc4 Kf5 87. Rd5#
1-0 {Telepath checkmated}
[Event "11th Annual WCRCC"]
[Site "chessclub.com"]
[Date "2017.06.24"]
[Round "7"]
[White "Arasan v20.1.0-46-ge836015"]
[Black "NightmareX"]
[Result "1/2-1/2"]
[ECO "A11"]
[WhiteElo "2398"]
[BlackElo "2712"]
[TimeControl "1500+4"]

1. c4 e6 2. Nf3 d5 3. e3 Nf6 4. Nc3 c6 5. b3 Nbd7 6. Qc2 Bd6 7. Bb2
O-O 8. Be2 a6 9. d4 Qe7 10. O-O e5 11. cxd5 e4 12. dxc6 exf3 13. Bxf3
Nb8 14. d5 Qc7 15. h3 bxc6 16. dxc6 Nxc6 17. Rac1 Bb7 18. Na4 Qe7
19. Qf5 Rac8 20. Nb6 Rc7 21. Bxf6 Qxf6 22. Qxf6 gxf6 23. Nd5 Rcc8
24. Nb6 Rc7 25. Nd5 Rcc8 26. Nb6 Rc7
1/2-1/2 {Game drawn by repetition}
[Event "11th Annual WCRCC"]
[Site "chessclub.com"]
[Date "2017.06.24"]
[Round "8"]
[White "Arasan v20.1.0-46-ge836015"]
[Black "Komodo"]
[Result "0-1"]
[ECO "C13"]
[WhiteElo "2398"]
[BlackElo "1400"]
[TimeControl "1500+4"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 dxe4 5. Nxe4 Be7 6. Bxf6 Bxf6
7. Nf3 O-O 8. Bc4 Nd7 9. Qe2 a6 10. O-O-O b5 11. Bb3 Nb6 12. c3 Bb7
13. Rhe1 b4 14. cxb4 a5 15. b5 a4 16. Bc2 a3 17. b3 Rc8 18. Ne5 c6
19. Nc5 Ba8 20. bxc6 Nd5 21. Qa6 g6 22. Qxa3 Bxc6 23. Qb2 Qa5 24. Bd3
Nc3 25. Rd2 Bg5 26. Nc4 Nxa2+ 27. Kb1 Bxd2 28. Nxa5 Bxa5 29. Re5 Nc3+
30. Kc2 Nd5 31. Qc1 Bc7 32. Re2 Nf4 33. Rd2 Nxg2 34. Kb2 Bf4 35. Qc3
Bd5 36. Rd1 Nh4 37. Ba6 Rcd8 38. Bb5 Nf5 39. Nd7 Rc8 40. Qh3 Rfd8
41. Nf6+ Kg7 42. Nxd5 Rxd5 43. Bc4 Rd7 44. Qg4 Bxh2 45. Qe4 Nd6
46. Qe2 Rb8 47. Kc3 Bf4 48. d5 e5 49. Ra1 h5 50. Ra6 Nxc4 51. bxc4 h4
52. Ra1 h3 53. Qa2 h2 54. Rh1 Rc7 55. Qa4 Rcb7 56. Qc2 Ra7 57. Kd3
Ra3+ 58. Ke2 Rab3 59. Qd1 Rc3 60. d6 Rb2+ 61. Ke1 Rcc2 62. Rxh2 Bxh2
63. Qxc2 0-1 {ArasanX resigns}
[Event "11th Annual WCRCC"]
[Site "chessclub.com"]
[Date "2017.06.25"]
[Round "9"]
[White "Goldbar"]
[Black "Arasan v20.1.0-50-gab0d574"]
[Result "1/2-1/2"]
[ECO "D36"]
[WhiteElo "2515"]
[BlackElo "2398"]
[TimeControl "1500+4"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 Nbd7 6. cxd5 exd5 7. e3
Be7 8. Qc2 O-O 9. Bd3 Re8 10. O-O Nf8 11. h3 Ne4 12. Bf4 f5 13. Ne5
Ng6 14. Nxg6 hxg6 15. f3 Nd6 16. Rfe1 Bg5 17. Qf2 Bh4 18. g3 Bf6
19. h4 g5 20. hxg5 Bxg5 21. Kg2 Bxf4 22. gxf4 Kf7 23. Rh1 Qf6 24. Rh5
Be6 25. Rah1 Ke7 26. Qh4 Bf7 27. Rh7 Qxh4 28. R7xh4 Kf6 29. Kf2 Re7
30. b3 Rae8 31. Re1 Re6 32. Rhh1 R6e7 33. Na4 b6 34. Ba6 Rb8 35. Rc1
Rc7 36. Nb2 b5 37. Nd3 Rb6 38. Nc5 Rb8 39. Rh7 Re7 40. Rh3 Rc7
41. Rhh1 Re7 42. a3 g6 43. Rh7 Rc7 44. Rch1 Re7 45. R1h3 Rbe8
46. R3h6 Rb8 47. Rh1 Rc7 48. Ke2 Re7 49. Kd2 Rc7 50. Ra1 Re7 51. Rc1
Be8 52. Rxe7 Kxe7 53. Rh1 Kf6 54. Rh7 Nf7 55. Ke2 Ke7 56. Rg7 Kf6
57. Rg8 Nh6 58. Rf8+ Ke7 59. Rh8 Nf7 60. Rh7 Kf6 61. Kf2 Ke7 62. Rg7
Kf6 63. Rg8 Nd6 64. Rf8+ Ke7 65. Rh8 Nf7 66. Rh7 Kf8 67. Ke1 Kg8
68. Rh2 Kf8 69. Kd1 Kg7 70. Kd2 Nd8 71. Kd3 Nf7 72. Rh4 Kf6 73. Rh7
g5 74. fxg5+ Kxg5 75. Rg7+ Kf6 76. Rg8 Nh6 77. Rg2 Nf7 78. Ke2 Nh6
79. Rh2 Kg6 80. Rh1 Nf7 81. Kf2 Nd6 82. Kg3 Kg5 83. Rh8 f4+ 84. exf4+
Kg6 85. Rg8+ Kf6 86. Kf2 Kf7 87. Rg5 Kf6 88. Ke3 Nf5+ 89. Kd3 Nh4
90. Kc3 Ng6 91. Rg4 Ra8 92. Nd3 Rd8 93. Rg2 Nf8 94. Kd2 Ne6 95. Ke3
Ng7 96. Ne5 Rb8 97. Rh2 Nf5+ 98. Kd3 Kg7 99. Kc3 Ne7 100. a4 Rb6
101. axb5 cxb5 102. Ra2 Kf6 103. Kd2 Ke6 104. Nd3 Kd6 105. Kc3 Bg6
106. Ne5 Be8 107. Ra5 Kc7 108. Kb4 Kd6 109. Ra1 Rb8 110. Kc3 Rb6
111. b4 Kc7 112. Nd3 Nf5 113. Nc5 Rb8 114. Rg1 Bf7 115. Rg5 Nd6
116. Re5 Kc6 117. Re7 Bh5 118. Re6 Kc7 119. f5 Nxf5 120. Re5 Bg6
121. Rxd5 Nd6 122. Re5 Bf5 123. d5 Rh8 124. Re7+ Kb6 125. Nb7 Re8
126. Rg7 Nc4 127. Nc5 Nd6 128. Bb7 Re3+ 129. Kd4 Rxf3 130. Ba8 Rf1
131. Ke5 Nc4+ 132. Kf6 Bc8+ 133. Ke7 a5 134. Rg6+ Ka7 135. Rg8 Bf5
136. bxa5 Re1+ 137. Kf6 Rf1 138. Rh8 Nxa5 139. Ke7 Rc1 140. Ne6 Be4
141. Nd4 b4 142. Nc6+ Nxc6+ 143. Bxc6 Rg1 144. Kd6 b3 145. Ra8+ Kb6
146. Rb8+ Ka6 147. Rxb3 Bxd5 148. Ra3+ Kb6 149. Bxd5 Rd1 150. Ke6
Re1+ 151. Kf7 Rf1+ 152. Ke8 Re1+ 153. Kd7 Rd1 154. Kd6 Rg1 155. Rb3+
Ka6 156. Bc4+ Ka7 157. Ra3+ Kb6 158. Ra6+ Kb7 159. Kd7 Rd1+ 160. Ke6
Rd4 161. Bb5 Rb4 162. Ra5 Kb6 163. Ra6+ Kxb5 164. Rd6 Rb1 165. Ke5
Re1+ 166. Kf5 Rf1+ 167. Kg5 Rb1 168. Rd5+ Kc4 169. Rd2 Rf1 170. Rc2+
Kd5 171. Kh5 Rg1 172. Rd2+ Ke4 173. Re2+ Kf5 174. Rf2+ Ke4 175. Re2+
Kd5 176. Rd2+ Kc6 177. Rc2+ Kb7 178. Rb2+ Ka8 179. Rb6 Rc1 180. Ra6+
Kb7 181. Rd6 Rh1+ 182. Kg5 Rg1+ 183. Kf5 Rh1 184. Ke5 Rh7 185. Rf6
Rc7 186. Ke4 Rd7 187. Kf4 Rc7 188. Re6 Rd7 189. Kf5 Rc7 190. Rg6 Rd7
191. Kf4 Rc7 192. Kf3 Rd7 193. Re6 Rc7 194. Rd6 Re7 195. Kg4 Rc7
196. Rf6 Rd7 197. Kg5 Rc7 198. Kh4 Rd7 199. Kh5 Rc7 200. Rd6 Re7
201. Rg6 Rc7 202. Kh4 Rd7 203. Re6 Rc7 204. Rd6 Re7 205. Kh5 Rc7
206. Re6 Rd7 207. Rh6 Rc7 208. Rf6 Rd7 209. Re6 Rc7 210. Kh4 Rd7
211. Rg6 Rc7 212. Kh5 Rd7 213. Rg1 Rd4
1/2-1/2 {Game drawn by the 50 move rule}
[Event "11th Annual WCRCC"]
[Site "chessclub.com"]
[Date "2017.06.25"]
[Round "10"]
[White "gogobello"]
[Black "Arasan v20.1.0-50-gab0d574"]
[Result "0-1"]
[ECO "B97"]
[WhiteElo "1400"]
[BlackElo "2398"]
[TimeControl "1500+4"]

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. Be2 Nbd7 11. O-O Qc5 12. Kh1 Be7
13. Bh4 O-O 14. g4 Bd8 15. Nb3 Qc7 16. g5 Ne8 17. a4 h6 18. Rg1 hxg5
19. Bxg5 Bf6 20. Rg3 b6 21. f5 Bb7 22. Nd4 Rc8 23. Rh3 Qd8 24. Bxf6
Qxf6 25. Rf1 Qe5 26. Rg1 Rxc3 27. Qxc3 Nc5 28. Rg2 Bxe4 29. Bf3 exf5
30. Bxe4 Nxe4 31. Qb4 N8f6 32. Nc6 Qe8 33. Qxb6 Ng4 34. Nb4 Nc5
35. Nd3 Qa8 36. Qb1 Re8 37. Kg1 Nxd3 38. cxd3 Qa7+ 39. Kf1 Ne3+
40. Rxe3 Qxe3 41. Qd1 Qh3 42. Kg1 Re3 43. Qa1 g6 44. Rb2 Qg4+ 45. Kh1
Re8 46. Qb1 Qxa4 47. Ra2 Qh4 48. Kg2 Re1 49. Qb8+ Kh7 50. Qxd6 f4
51. Qc6 Qg4+ 52. Kf2 Qg1+ 53. Kf3 Re3+ 54. Kxf4 Rxd3 55. Qe4 Qc1+
56. Kg4 f5+ 57. Qxf5 Qg1+ 58. Kh4 gxf5 59. Rg2 Qxg2 60. h3 Rxh3#
0-1 {gogobello checkmated}
[Event "11th Annual WCRCC"]
[Site "chessclub.com"]
[Date "2017.06.25"]
[Round "11"]
[White "Arasan v20.1.0-50-gab0d574"]
[Black "DeltomateX"]
[Result "1-0"]
[ECO "A22"]
[WhiteElo "2398"]
[BlackElo "2429"]
[TimeControl "1500+4"]

1. c4 Nf6 2. g3 e5 3. Bg2 d5 4. cxd5 Nxd5 5. Nc3 Nb6 6. d3 Be7 7. Be3
O-O 8. Rc1 Re8 9. Nf3 Nc6 10. O-O Bf8 11. Ne4 Nd4 12. Nc5 Nxf3+
13. Bxf3 c6 14. Qb3 Bxc5 15. Bxc5 Be6 16. Qb4 Qd7 17. Rfd1 Bxa2
18. e4 Be6 19. d4 exd4 20. Rxd4 Qc7 21. Bd6 Qd8 22. Bf4 Qc8 23. Be2
Nd7 24. Qc3 Nf6 25. Be5 c5 26. Bxf6 cxd4 27. Qd2 gxf6 28. Rxc8 Raxc8
29. Qxd4 Bh3 30. f3 Rc2 31. Kf2 Be6 32. Ke3 Kg7 33. g4 a6 34. g5 Kg8
35. gxf6 Rec8 36. Qb6 R2c5 37. Qxb7 a5 38. f4 Kh8 39. e5 Bd5 40. Qa7
Rc1 41. f5 R1c7 42. Qxa5 Rc5 43. Qa7 R5c7 44. Qb6 Rb7 45. Qd6 Ba2
46. e6 Rb3+ 47. Kf2 Rbb8 48. e7 Rg8 49. Qe5 h6 50. Bb5 Kh7 51. e8=Q
Rbxe8 52. Bxe8 Rg4 53. Qe7 Kg8 54. Qb7 Rg5 55. Ke3 Bc4 56. b3 Rxf5
57. Bxf7+ Bxf7 58. Qc8+ Kh7 59. Qxf5+ Kg8 60. Qc8+ Kh7 61. Qg4 Bg6
62. Qd7+ Bf7 63. Qxf7+ Kh8 64. Qg7# 1-0 {DeltomateX checkmated}
[Event "11th Annual WCRCC"]
[Site "chessclub.com"]
[Date "2017.06.25"]
[Round "12"]
[White "ChironX"]
[Black "Arasan v20.1.0-45-g45ad5a0"]
[Result "1/2-1/2"]
[ECO "E53"]
[WhiteElo "2784"]
[BlackElo "2398"]
[TimeControl "1500+4"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O
cxd4 8. exd4 dxc4 9. Bxc4 a6 10. Bg5 b5 11. Be2 Bb7 12. a4 bxa4
13. Qxa4 a5 14. Rfd1 Nbd7 15. Ne5 Qc7 16. Nb5 Qb8 17. Bf4 Nb6 18. Qb3
Nfd5 19. Bd2 Bxd2 20. Rxd2 a4 21. Qd1 Ra5 22. Rc2 Nf4 23. Rc5 f6
24. Nc6 Bxc6 25. Rxc6 Qb7 26. Rac1 Nbd5 27. Nd6 Qxb2 28. Bf1 Qb3
29. Qe1 Qb4 30. Qe4 Qd2 31. g3 f5 32. Qf3 Ng6 33. Rd1 Qg5 34. Nb7 Nh4
35. Qe2 Nf4 36. Qe3 Ra7 37. Rb1 Nfg6 38. Qxe6+ Kh8 39. Rc8 Nf3+
40. Kh1 Nd2 41. Rxf8+ Nxf8 42. Qe8 Kg8 43. Bg2 Ne4 44. Kg1 Qd2
45. Bxe4 fxe4 46. Qxe4 Qa2 47. Qd3 Ra8 48. Nc5 Ne6 49. Qe4 Nc7
50. Rb7 Re8 51. Qf3 Rf8 52. Qe3 Re8 53. Qc1 Ne6 54. Rb2 Qd5 55. Re2
Rc8 56. Qe1 Nf8 57. Qa1 Rd8 58. Qxa4 Qxd4 59. Qxd4 Rxd4 60. Kg2 Rd5
61. Ne4 h6 62. h4 Re5 63. Nc3 Rc5 64. Re3 Nd7 65. Ne4 Re5 66. Kf3
Rf5+ 67. Ke2 Ra5 68. Rc3 Kf7 69. Ke3 Nf6 70. Rc5 Ng4+ 71. Ke2 Rxc5
72. Nxc5 Kf6 73. f3 Ne5 74. Nd3 Nc4 75. Nf2 Kf5 76. Nd1 h5 77. Kf2
Ke5 78. Nc3 Nb6 79. Ke2 Nc8 80. Nd1 Nd6 81. Ne3 Nb5 82. Ng2 Nc3+
83. Kf2 Nd5 84. Ne3 Nb4 85. Ng2 Nd5 86. Ke2 Kf6 87. Kd3 Ke5 88. Ne3
Nb4+ 89. Kc4 Nc6 90. Nc2 Ne7 91. Kc3 Nf5 92. g4 Nxh4 93. gxh5 Nxf3
94. Kc4 Ke4 95. Kc3 Kf5 96. Kc4 Ke4 97. Kc3 Ne5 98. Nd4 Ng4 99. Ne6
Nf2 100. Nxg7 Nd1+ 101. Kb4 Ne3 102. h6 Nd5+ 103. Kc5 Nf6 104. Kd6
Kf4 105. Ne6+ Kf5 106. Nf8 Kg5 107. h7 Nxh7
1/2-1/2 {Game drawn because neither player has mating material}
[Event "11th Annual WCRCC"]
[Site "chessclub.com"]
[Date "2017.06.25"]
[Round "13"]
[White "Arasan v20.1.0-50-gab0d574"]
[Black "BertaX"]
[Result "1-0"]
[ECO "C67"]
[WhiteElo "2398"]
[BlackElo "2305"]
[TimeControl "1500+4.00"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. Bxc6 dxc6
7. dxe5 Nf5 8. Qxd8+ Kxd8 9. Nc3 Ke8 10. Rd1 h6 11. b3 Be6 12. Bb2
Rd8 13. Ne2 Bc5 14. Nf4 g5 15. Nxe6 fxe6 16. Rxd8+ Kxd8 17. Rd1+ Kc8
18. Rd3 Ne7 19. g3 Ng6 20. h3 Rf8 21. Kg2 a6 22. a3 Rf7 23. Rd2 Bf8
24. Rd4 Bc5 25. Rg4 Kd7 26. a4 Ke7 27. b4 Ba7 28. a5 Rf5 29. c4 c5
30. b5 axb5 31. cxb5 b6 32. a6 Kd7 33. h4 c6 34. bxc6+ Kxc6 35. hxg5
h5 36. Rc4 Rf7 37. Rc1 Bb8 38. Rh1 b5 39. Rxh5 Rg7 40. Rh6 Kd5
41. Nh4 Nxh4+ 42. gxh4 Bxe5 43. Bxe5 Kxe5 44. g6 c4 45. h5 c3 46. Rh8
Rc7 47. h6 c2 48. g7 c1=Q 49. g8=Q Qf4 50. Qg3 Qxg3+ 51. fxg3 Ra7
52. Rg8 Ke4 53. Rg4+ Ke3 54. Rh4 Rxa6 55. h7 Ra2+ 56. Kh3 Ra8
57. h8=Q Rxh8 58. Rxh8 b4 59. Re8 Kd4 60. Rxe6 b3 61. Rf6 b2 62. Rb6
Kc3 63. g4 Kc2 64. g5 b1=Q 65. Rxb1 Kxb1 66. g6 Kc2 67. g7 Kd3
68. g8=Q Kc3 69. Qg4 Kd3 70. Qb4 Ke2 71. Qb3 Kd2 72. Kg3 Ke2 73. Qc3
Kd1 74. Qb2 Ke1 75. Qc2 Kf1 76. Qd1# 1-0 {BertaX checkmated}
[/pgn]

[Lyudmil Tsvetkov]

thanks, Jon.

an interesting account.

reminds me of those paperback Russian chess books I used to read when computers still were not accessible.