The nightmare of every programmer

Bugs come with programming, they can't be avoided. The vast majority of bugs are easy to fix. The hardest bugs are those programs that after years of functioning flawlessly suddenly start to misbehave. 2 days ago I had such a case, in the 90's I wrote my own pgn parser which I use for the development of NNUE. Everything worked fine for Rebel 14, 14.2, 14.2 and 15.

Until now, when working on a new net (currently ~650 million epds) suddenly I got errors showing funny epds without kings and other very creative but faulty epds. Flabbergasted.... What's going on? No idea. Long story short (lucky to find the bastard within 2 day days only, I once had a bug in the 90's that took me weeks) there were a couple of pgn games that exceeded the maximum number of moves (500) as defined in the pgn util. Doubling the number of moves to 1000 fixed the problem.

PGN example in the next post, look and shiver

[Event "?"]
[Site "?"]
[Date "2022.05.12"]
[Round "3382"]
[White "r15b"]
[Black "r15a"]
[Result "1/2-1/2"]
[FEN "rnb1k1nr/1pqpp2p/p1p2ppb/8/1PPP4/B4P2/P3P1PP/RN1QKBNR w KQkq - 0 1"]
[PlyCount "1046"]
[SetUp "1"]
[TimeControl "inf"]

1. Bc1 {-0.08/6 0.059s} a5 {+0.25/6 0.093s} 2. Bxh6 {-0.14/6 0.053s}
Nxh6 {+0.15/6 0.017s} 3. Qd2 {-0.18/6 0.018s} Nf7 {0.00/6 0.021s}
4. b5 {-0.15/6 0.019s} O-O {-0.21/6 0.044s} 5. Nc3 {+0.21/6 0.045s}
e5 {-0.33/6 0.080s} 6. e3 {+0.33/6 0.049s} Re8 {-0.25/6 0.047s}
7. Nge2 {+0.49/6 0.098s} d6 {-0.44/6 0.074s} 8. h4 {+0.26/6 0.064s}
h5 {-0.32/6 0.065s} 9. Kf2 {+0.42/6 0.14s} Nd7 {-0.26/6 0.028s}
10. Ne4 {+0.14/6 0.14s} f5 {-0.09/6 0.056s} 11. Ng5 {+0.15/6 0.039s}
Nf6 {-0.21/6 0.054s} 12. Nc3 {+0.09/6 0.20s} e4 {-0.21/6 0.095s}
13. Be2 {+0.19/6 0.14s} d5 {-0.28/6 0.14s} 14. f4 {+0.42/6 0.13s}
Bd7 {-0.62/6 0.16s} 15. Rhc1 {+0.83/6 0.090s} Qd6 {-0.89/6 0.089s}
16. Kg1 {+0.93/6 0.094s} cxb5 {-1.00/6 0.10s} 17. c5 {+1.07/6 0.025s}
Qe7 {-0.91/6 0.031s} 18. Nxb5 {+1.15/6 0.051s} Bxb5 {-1.09/6 0.019s}
19. Bxb5 {+1.04/6 0.018s} Rec8 {-1.21/6 0.017s} 20. Be2 {+1.24/6 0.036s}
Nh6 {-1.38/6 0.033s} 21. Rab1 {+1.48/6 0.032s} Nhg4 {-1.58/6 0.033s}
22. Rb5 {+1.58/6 0.016s} Rc7 {-1.77/6 0.032s} 23. Rcb1 {+1.92/6 0.032s}
Ra6 {-1.89/6 0.057s} 24. a4 {+2.08/6 0.12s} Kh8 {-2.56/6 0.10s}
25. R1b3 {+2.70/6 0.041s} Kg7 {-3.02/6 0.054s} 26. Rxa5 {+3.05/6 0.038s}
Rxa5 {-3.22/6 0.022s} 27. Qxa5 {+3.22/6 0.022s} Ne8 {-3.45/6 0.032s}
28. Qb6 {+3.61/6 0.017s} Kh6 {-3.55/6 0.024s} 29. a5 {+3.70/6 0.035s}
Ngf6 {-4.04/6 0.036s} 30. Bb5 {+4.64/6 0.031s} Ng7 {-4.90/6 0.031s}
31. Qd6 {+4.98/6 0.027s} Qxd6 {-5.47/6 0.085s} 32. cxd6 {+5.31/6 0.042s}
Rc1+ {-5.44/6 0.013s} 33. Kf2 {+5.31/6 0.006s} Ng4+ {-5.84/6 0.090s}
34. Ke2 {+5.47/6 0.019s} Rc2+ {-6.27/6 0.073s} 35. Kd1 {+5.83/6 0.056s}
Ra2 {-6.27/6 0.062s} 36. d7 {+6.60/6 0.15s} Rxa5 {-6.47/6 0.15s}
37. d8=N {+6.44/6 0.20s} Ne6 {-6.47/6 0.008s} 38. Ngxe6 {+6.51/6 0.069s}
Nxe3+ {-6.40/6 0.034s} 39. Rxe3 {+6.51/6 0.007s} Rxb5 {-6.58/6 0.023s}
40. Ke2 {+6.60/6 0.085s} Rb4 {-6.65/6 0.091s} 41. Kf2 {+6.70/6 0.044s}
Kh7 {-6.64/6 0.029s} 42. Re1 {+6.71/6 0.050s} Kh8 {-6.52/6 0.015s}
43. Kf1 {+6.69/6 0.041s} Kg8 {-6.79/6 0.033s} 44. Rc1 {+6.60/6 0.032s}
Rb2 {-6.59/6 0.030s} 45. Nc7 {+6.67/6 0.10s} b5 {-6.58/6 0.066s}
46. Rc6 {+6.48/6 0.053s} Rb1+ {-6.72/6 0.077s} 47. Ke2 {+6.64/6 0.028s}
Rb2+ {-6.97/6 0.26s} 48. Kd1 {+6.63/6 0.041s} Kh8 {-6.79/6 0.22s}
49. Nf7+ {+6.69/6 0.34s} Kg8 {-6.97/6 0.035s} 50. Ne5 {+6.88/6 0.12s}
Rb1+ {-7.02/6 0.33s} 51. Ke2 {+7.21/6 0.052s} Rb2+ {-6.79/6 0.017s}
52. Ke1 {+6.80/6 0.039s} Rb1+ {-6.63/6 0.008s} 53. Kd2 {+6.58/6 0.033s}
b4 {-7.26/6 0.070s} 54. Nxd5 {+7.34/6 0.10s} Rb2+ {-7.37/6 0.12s}
55. Rc2 {+7.34/6 0.008s} Rb1 {-7.19/6 0.054s} 56. Rc8+ {+7.54/6 0.067s}
Kh7 {-7.34/6 0.016s} 57. Nc4 {+7.47/6 0.073s} Rb3 {-7.74/6 0.062s}
58. Rb8 {+7.86/6 0.078s} Rd3+ {-8.07/6 0.054s} 59. Ke2 {+7.86/6 0.018s}
b3 {-8.09/6 0.048s} 60. Nde3 {+8.02/6 0.035s} Rc3 {-8.09/6 0.013s}
61. Nd2 {+8.07/6 0.058s} Rd3 {-8.35/6 0.027s} 62. Rxb3 {+8.33/6 0.023s}
Rxd4 {-8.35/6 0.028s} 63. Ndc4 {+8.33/6 0.032s} Rd7 {-8.19/6 0.008s}
64. Ra3 {+8.16/6 0.052s} Ra7 {-8.00/6 0.014s} 65. Rxa7+ {+10.19/6 0.029s}
Kh8 {-9.73/6 0.032s} 66. Ke1 {+10.26/6 0.043s} Kg8 {-10.14/6 0.014s}
67. Ra2 {+10.62/6 0.030s} Kh8 {-10.36/6 0.025s} 68. Rf2 {+10.57/6 0.023s}
Kh7 {-10.41/6 0.016s} 69. Nd1 {+10.83/6 0.046s} Kg7 {-10.29/6 0.017s}
70. Nd2 {+10.83/6 0.023s} Kh8 {-10.70/6 0.026s} 71. Rf1 {+10.71/6 0.024s}
Kg7 {-10.56/6 0.016s} 72. Nc4 {+10.78/6 0.025s} Kf8 {-10.56/6 0.022s}
73. Nde3 {+10.94/6 0.024s} Kg7 {-10.27/6 0.037s} 74. Kf2 {+10.73/6 0.032s}
Kh8 {-10.61/6 0.025s} 75. Kg1 {+10.82/6 0.015s} g5 {-10.74/6 0.022s}
76. Nxf5 {+10.86/6 0.081s} Kh7 {-10.71/6 0.035s} 77. Ng3 {+11.01/6 0.016s}
g4 {-11.43/6 0.084s} 78. Ne2 {+11.45/6 0.045s} Kg6 {-11.24/6 0.029s}
79. g3 {+11.50/6 0.031s} Kh6 {-11.64/6 0.013s} 80. Ne3 {+11.36/6 0.020s}
Kh7 {-11.74/6 0.011s} 81. Kf2 {+12.53/6 0.034s} Kg6 {-11.74/6 0.017s}
82. Rh1 {+12.53/6 0.020s} Kh6 {-11.89/6 0.017s} 83. Kg1 {+11.63/6 0.030s}
Kh7 {-11.99/6 0.012s} 84. Nc3 {+12.67/6 0.023s} Kg8 {-12.76/6 0.017s}
85. Nb1 {+12.76/6 0.034s} Kh7 {-12.76/6 0.012s} 86. Nd2 {+12.29/6 0.011s}
Kh8 {-12.76/6 0.009s} 87. Nxe4 {+12.02/6 0.018s} Kh7 {-12.60/6 0.008s}
88. Nf2 {+13.24/6 0.008s} Kg6 {-13.13/6 0.011s} 89. Nf1 {+13.00/6 0.018s}
Kh7 {-12.50/6 0.010s} 90. Nd2 {+12.31/6 0.016s} Kg7 {-12.27/6 0.011s}
91. Nde4 {+12.22/6 0.013s} Kg6 {-12.48/6 0.014s} 92. Nc3 {+12.35/6 0.017s}
Kh6 {-12.57/6 0.007s} 93. Ne2 {+12.52/6 0.023s} Kg6 {-12.34/6 0.009s}
94. Nd1 {+12.50/6 0.022s} Kh7 {-12.28/6 0.012s} 95. Ne3 {+12.49/6 0.016s}
Kh8 {-12.24/6 0.010s} 96. Nf5 {+12.45/6 0.011s} Kh7 {-11.44/6 0.018s}
97. Nd6 {+12.21/6 0.015s} Kg8 {-12.48/6 0.013s} 98. Nb5 {+12.45/6 0.011s}
Kg7 {-11.99/6 0.009s} 99. Nbc3 {+11.84/6 0.017s} Kg8 {-12.48/6 0.007s}
100. Ne4 {+12.22/6 0.008s} Kh7 {-12.27/6 0.009s} 101. Nd2 {+12.40/6 0.026s}
Kh8 {-11.99/6 0.010s} 102. Kf1 {+12.29/6 0.016s} Kh7 {-12.02/6 0.011s}
103. Rg1 {+12.20/6 0.014s} Kg6 {-11.86/6 0.011s} 104. Rg2 {+12.32/6 0.012s}
Kg7 {-12.04/6 0.013s} 105. Rh2 {+12.16/6 0.012s} Kh7 {-12.10/6 0.011s}
106. Ke1 {+12.22/6 0.018s} Kh6 {-12.18/6 0.006s} 107. Nb1 {+12.37/6 0.028s}
Kg7 {-12.28/6 0.010s} 108. Nbc3 {+12.27/6 0.014s} Kh7 {-11.99/6 0.012s}
109. Ne4 {+12.55/6 0.019s} Kg8 {-12.74/6 0.014s} 110. Nd2 {+12.04/6 0.023s}
Kh8 {-12.30/6 0.010s} 111. Ng1 {+12.45/6 0.019s} Kh7 {-11.86/6 0.009s}
112. Nb3 {+12.41/6 0.016s} Kg6 {-12.08/6 0.013s} 113. Nc1 {+12.29/6 0.016s}
Kf5 {-12.01/6 0.011s} 114. Nce2 {+12.07/6 0.025s} Kg6 {-12.07/6 0.017s}
115. Nc3 {+12.50/6 0.012s} Kh6 {-11.98/6 0.011s} 116. Ra2 {+12.27/6 0.029s}
Kg6 {-12.11/6 0.017s} 117. Rb2 {+12.50/6 0.022s} Kg7 {-12.34/6 0.013s}
118. Nge2 {+12.55/6 0.035s} Kg6 {-12.46/6 0.019s} 119. Rb6+ {+12.81/6 0.041s}
Kg7 {-12.46/6 0.010s} 120. Nb1 {+12.73/6 0.036s} Kf7 {-13.02/6 0.021s}
121. Nd2 {+12.76/6 0.030s} Ke7 {-12.77/6 0.017s} 122. Rb2 {+12.76/6 0.052s}
Ke6 {-12.67/6 0.020s} 123. Rb7 {+12.81/6 0.043s} Kd6 {-12.72/6 0.021s}
124. Rb8 {+12.76/6 0.059s} Ke6 {-12.72/6 0.021s} 125. Rb5 {+13.08/6 0.052s}
Kf6 {-12.82/6 0.013s} 126. Rxh5 {+12.95/6 0.037s} Kg6 {-13.02/6 0.012s}
127. Rb5 {+12.86/6 0.018s} Kh6 {-12.86/6 0.008s} 128. Nc1 {+12.57/6 0.034s}
Kg6 {-12.87/6 0.010s} 129. Rb6+ {+12.75/6 0.032s} Kh5 {-12.87/6 0.008s}
130. Rb3 {+12.85/6 0.012s} Kg6 {-12.99/6 0.007s} 131. Kd1 {+12.37/6 0.031s}
Kg7 {-12.97/6 0.013s} 132. Na2 {+12.57/6 0.040s} Kh7 {-12.97/6 0.013s}
133. Nb4 {+13.12/6 0.026s} Kg8 {-12.96/6 0.008s} 134. Rd3 {+13.23/6 0.021s}
Kh7 {-12.97/6 0.011s} 135. Nc2 {+13.23/6 0.012s} Kg7 {-12.97/6 0.009s}
136. Rb3 {+13.23/6 0.025s} Kh8 {-13.12/6 0.007s} 137. Rb1 {+13.51/6 0.023s}
Kg7 {-12.93/6 0.012s} 138. Ra1 {+13.23/6 0.034s} Kh6 {-13.23/6 0.010s}
139. Ra3 {+13.23/6 0.022s} Kg7 {-13.12/6 0.008s} 140. Rd3 {+13.23/6 0.021s}
Kg8 {-12.97/6 0.010s} 141. Rc3 {+13.11/6 0.024s} Kf8 {-12.91/6 0.015s}
142. Kc1 {+13.23/6 0.030s} Kg7 {-12.93/6 0.015s} 143. Re3 {+13.23/6 0.026s}
Kh7 {-12.93/6 0.010s} 144. Rb3 {+13.02/6 0.026s} Kg7 {-12.93/6 0.012s}
145. Ra3 {+13.02/6 0.025s} Kh6 {-12.89/6 0.009s} 146. Ra5 {+13.02/6 0.022s}
Kg6 {-12.98/6 0.011s} 147. Ra2 {+13.05/6 0.024s} Kh6 {-12.98/6 0.007s}
148. Ra3 {+13.05/6 0.016s} Kg6 {-12.92/6 0.008s} 149. Ra4 {+13.05/6 0.014s}
Kg7 {-12.88/6 0.010s} 150. Ra1 {+13.05/6 0.014s} Kh7 {-12.74/6 0.013s}
151. Nc4 {+13.62/6 0.020s} Kg6 {-13.62/6 0.017s} 152. N4e3 {+13.62/6 0.030s}
Kg7 {-13.62/6 0.020s} 153. Kb1 {+13.62/6 0.030s} Kg6 {-14.21/6 0.012s}
154. Nxg4 {+13.83/6 0.035s} Kh7 {-13.86/6 0.009s} 155. Nge3 {+13.83/6 0.018s}
Kg7 {-13.95/6 0.010s} 156. Nd1 {+13.86/6 0.024s} Kh7 {-13.60/6 0.008s}
157. Nb2 {+13.84/6 0.026s} Kg8 {-13.66/6 0.013s} 158. Na4 {+13.83/6 0.022s}
Kh7 {-13.57/6 0.007s} 159. Nc3 {+13.84/6 0.013s} Kh8 {-13.57/6 0.008s}
160. Ne4 {+13.76/6 0.022s} Kh7 {-13.57/6 0.012s} 161. Nf2 {+13.84/6 0.020s}
Kg7 {-13.57/6 0.010s} 162. g4 {+13.83/6 0.017s} Kh7 {-13.57/6 0.006s}
163. Nd1 {+13.69/6 0.018s} Kg8 {-13.57/6 0.007s} 164. Nb2 {+13.67/6 0.020s}
Kh7 {-13.57/6 0.009s} 165. Na4 {+13.69/6 0.016s} Kg8 {-13.41/6 0.007s}
166. Nc3 {+13.83/6 0.014s} Kh7 {-13.57/6 0.011s} 167. h5 {+13.62/6 0.025s}
Kg7 {-13.16/6 0.012s} 168. Na3 {+13.46/6 0.021s} Kg8 {-13.16/6 0.010s}
169. Nd1 {+12.94/6 0.021s} Kh7 {-13.16/6 0.010s} 170. Ne3 {+12.83/6 0.015s}
Kg8 {-13.16/6 0.009s} 171. Nec4 {+12.89/6 0.017s} Kg7 {-13.16/6 0.007s}
172. Nc2 {+12.57/6 0.016s} Kh6 {-13.16/6 0.008s} 173. Nb2 {+12.82/6 0.015s}
Kh7 {-13.16/6 0.007s} 174. Na4 {+12.64/6 0.021s} Kg8 {-13.74/6 0.009s}
175. Nc5 {+12.48/6 0.017s} Kh7 {-13.61/6 0.013s} 176. Nd3 {+12.45/6 0.021s}
Kh8 {-13.16/6 0.011s} 177. Ndb4 {+12.57/6 0.021s} Kh7 {-13.16/6 0.015s}
178. Na3 {+12.57/6 0.017s} Kg8 {-13.16/6 0.010s} 179. Na2 {+12.51/6 0.011s}
Kh7 {-13.16/6 0.006s} 180. Nc4 {+12.65/6 0.010s} Kg7 {-13.16/6 0.013s}
181. Nd2 {+12.62/6 0.018s} Kg8 {-13.61/6 0.011s} 182. Nf1 {+12.38/6 0.018s}
Kg7 {-13.16/6 0.009s} 183. Ne3 {+12.51/6 0.014s} Kg8 {-13.16/6 0.007s}
184. Nc1 {+12.51/6 0.014s} Kf8 {-13.61/6 0.014s} 185. Nc2 {+12.51/6 0.024s}
Kg8 {-13.61/6 0.007s} 186. Na3 {+12.57/6 0.014s} Kh7 {-13.61/6 0.008s}
187. Ne2 {+12.48/6 0.014s} Kg7 {-13.04/6 0.012s} 188. Nd4 {+12.77/6 0.011s}
Kh6 {-13.61/6 0.007s} 189. Nac2 {+12.48/6 0.015s} Kh7 {-13.61/6 0.005s}
190. Nb5 {+12.19/6 0.013s} Kh8 {-12.88/6 0.014s} 191. Ne3 {+12.71/6 0.017s}
Kg7 {-13.38/6 0.012s} 192. Nd1 {+12.46/6 0.014s} Kh8 {-13.16/6 0.009s}
193. Nf2 {+13.26/6 0.015s} Kg7 {-13.16/6 0.012s} 194. Nc3 {+13.13/6 0.013s}
Kh6 {-13.34/6 0.014s} 195. Na2 {+12.58/6 0.017s} Kg7 {-13.38/6 0.014s}
196. Nc1 {+12.50/6 0.014s} Kh7 {-13.34/6 0.016s} 197. Nd1 {+12.50/6 0.015s}
Kg8 {-13.38/6 0.006s} 198. Nb2 {+12.67/6 0.019s} Kg7 {-13.50/6 0.007s}
199. Na4 {+12.67/6 0.014s} Kh7 {-13.55/6 0.011s} 200. Ne2 {+12.67/6 0.009s}
Kg7 {-13.34/6 0.013s} 201. Nb2 {+12.49/6 0.014s} Kg8 {-13.86/6 0.009s}
202. Nc3 {+12.60/6 0.017s} Kh8 {-13.67/6 0.008s} 203. Ncd1 {+12.60/6 0.014s}
Kg8 {-13.66/6 0.010s} 204. Na4 {+12.45/6 0.017s} Kg7 {-13.41/6 0.010s}
205. Ra3 {+12.50/6 0.019s} Kf7 {-12.66/6 0.026s} 206. Nac3 {+12.45/6 0.023s}
Kf8 {-13.34/6 0.011s} 207. Ra1 {+12.43/6 0.020s} Kg8 {-13.14/6 0.006s}
208. Nf2 {+12.54/6 0.013s} Kg7 {-13.34/6 0.008s} 209. Nd3 {+12.46/6 0.016s}
Kh7 {-13.38/6 0.010s} 210. Na2 {+12.45/6 0.012s} Kg7 {-13.61/6 0.007s}
211. Nb2 {+12.43/6 0.011s} Kg8 {-13.38/6 0.005s} 212. Nd1 {+13.10/6 0.010s}
Kh7 {-13.38/6 0.006s} 213. Nb4 {+13.11/6 0.010s} Kg7 {-13.35/6 0.006s}
214. Nb2 {+12.57/6 0.015s} Kg8 {-13.20/6 0.009s} 215. Na2 {+12.29/6 0.015s}
Kh7 {-11.97/6 0.010s} 216. f5 {+12.38/6 0.010s} Kg7 {-12.22/6 0.006s}
217. Nb4 {+12.22/6 0.017s} Kg8 {-12.61/6 0.011s} 218. Nc4 {+12.13/6 0.016s}
Kf8 {-12.50/6 0.010s} 219. Ne3 {+11.89/6 0.024s} Kg7 {-12.20/6 0.010s}
220. Na2 {+12.13/6 0.013s} Kh7 {-12.53/6 0.009s} 221. Nc3 {+11.80/6 0.015s}
Kg8 {-12.64/6 0.012s} 222. Ned1 {+12.18/6 0.008s} Kh8 {-12.64/6 0.008s}
223. Nb5 {+12.22/6 0.013s} Kh7 {-12.61/6 0.007s} 224. Na3 {+12.38/6 0.015s}
Kg7 {-12.61/6 0.006s} 225. Nc4 {+12.14/6 0.015s} Kf8 {-12.35/6 0.014s}
226. Ncb2 {+12.02/6 0.020s} Kg7 {-12.46/6 0.008s} 227. Nc3 {+11.58/6 0.015s}
Kh7 {-12.53/6 0.010s} 228. Ne2 {+11.02/6 0.015s} Kg7 {-13.02/6 0.011s}
229. Nd1 {+11.58/6 0.021s} Kh8 {-12.28/6 0.010s} 230. Nec3 {+11.41/6 0.016s}
Kh7 {-12.63/6 0.006s} 231. Nb5 {+11.80/6 0.013s} Kh8 {-12.61/6 0.006s}
232. Nd4 {+11.55/6 0.015s} Kh7 {-12.61/6 0.006s} 233. Nc2 {+11.58/6 0.008s}
Kg7 {-12.61/6 0.004s} 234. Na3 {+12.02/6 0.015s} Kh8 {-12.88/6 0.006s}
235. Nc4 {+11.86/6 0.011s} Kh7 {-12.61/6 0.006s} 236. Ndb2 {+11.58/6 0.016s}
Kg8 {-12.61/6 0.007s} 237. Na3 {+11.82/6 0.011s} Kh7 {-12.61/6 0.007s}
238. Nc2 {+10.88/6 0.016s} Kh8 {-12.50/6 0.006s} 239. Ra8+ {+12.48/6 0.021s}
Kh7 {-12.08/6 0.015s} 240. h6 {+12.90/6 0.039s} Kxh6 {-13.09/4 0.006s}
241. Ra1 {+12.90/6 0.012s} Kh7 {-12.68/6 0.007s} 242. Nd1 {+12.90/6 0.018s}
Kg8 {-12.77/6 0.007s} 243. Ra3 {+12.89/6 0.017s} Kg7 {-12.66/6 0.022s}
244. Rh3 {+12.89/6 0.020s} Kg8 {-13.13/6 0.021s} 245. Rg3 {+12.89/6 0.025s}
Kh7 {-12.69/6 0.009s} 246. Rd3 {+12.88/6 0.014s} Kh6 {-12.67/6 0.015s}
247. Rd4 {+12.89/6 0.020s} Kh7 {-12.77/6 0.014s} 248. Rd2 {+12.94/6 0.016s}
Kh6 {-12.44/6 0.009s} 249. Nb2 {+12.43/6 0.057s} Kg7 {-12.83/6 0.022s}
250. Rd1 {+13.11/6 0.036s} Kg8 {-12.99/6 0.010s} 251. Rh1 {+13.11/6 0.022s}
Kf8 {-13.13/6 0.008s} 252. Nd1 {+13.02/6 0.019s} Kg7 {-12.81/6 0.008s}
253. Rh2 {+12.89/6 0.016s} Kf8 {-13.13/6 0.008s} 254. Rh4 {+12.89/6 0.024s}
Kg8 {-13.13/6 0.009s} 255. Rh3 {+12.89/6 0.010s} Kf8 {-13.03/6 0.006s}
256. Rh2 {+12.89/6 0.018s} Kg8 {-12.67/6 0.013s} 257. Rh4 {+12.89/6 0.018s}
Kf8 {-12.62/6 0.008s} 258. Rh8+ {+12.89/6 0.011s} Kf7 {-12.60/6 0.010s}
259. Na3 {+12.83/6 0.018s} Kg7 {-12.76/6 0.018s} 260. Rh2 {+12.94/6 0.017s}
Kf7 {-12.81/6 0.019s} 261. Nb2 {+12.85/6 0.031s} Kg7 {-12.69/6 0.011s}
262. Rf2 {+12.85/6 0.027s} Kf8 {-12.81/6 0.017s} 263. Re2 {+12.85/6 0.020s}
Kg8 {-12.81/6 0.007s} 264. Re1 {+13.11/6 0.024s} Kg7 {-13.04/6 0.010s}
265. Rg1 {+12.95/6 0.025s} Kh6 {-12.97/6 0.016s} 266. Rc1 {+12.74/6 0.018s}
Kg7 {-13.04/6 0.026s} 267. Rf1 {+12.85/6 0.023s} Kh6 {-12.49/6 0.009s}
268. Rf4 {+12.80/6 0.025s} Kg7 {-12.81/6 0.010s} 269. Rc4 {+12.80/6 0.013s}
Kh7 {-12.77/6 0.013s} 270. Ka2 {+12.99/6 0.023s} Kh8 {-13.69/6 0.015s}
271. Rf4 {+13.16/6 0.018s} Kg8 {-13.27/6 0.006s} 272. Re4 {+13.00/6 0.013s}
Kf7 {-13.02/6 0.009s} 273. Re2 {+12.85/6 0.022s} Kg7 {-13.12/6 0.010s}
274. Rc2 {+12.69/6 0.020s} Kf8 {-12.81/6 0.015s} 275. Kb1 {+12.78/6 0.019s}
Kg8 {-12.97/6 0.012s} 276. Rc8+ {+12.85/6 0.018s} Kh7 {-12.77/6 0.013s}
277. Rc4 {+12.85/6 0.019s} Kh6 {-12.92/6 0.009s} 278. Ra4 {+12.77/6 0.024s}
Kh7 {-13.69/6 0.006s} 279. Ra7+ {+12.85/6 0.019s} Kh8 {-13.02/6 0.013s}
280. Rc7 {+12.85/6 0.010s} Kg8 {-12.77/4 0.007s} 281. Rc2 {+12.85/6 0.012s}
Kf7 {-12.97/6 0.009s} 282. Rc8 {+12.85/6 0.013s} Ke7 {-12.79/6 0.016s}
283. Rc1 {+12.85/6 0.019s} Kd7 {-12.95/6 0.013s} 284. Rc2 {+12.85/6 0.016s}
Kd6 {-12.97/6 0.016s} 285. Nd1 {+13.02/6 0.022s} Kd5 {-12.79/6 0.021s}
286. Rc4 {+12.79/6 0.034s} Ke5 {-12.95/6 0.010s} 287. Nc2 {+13.37/6 0.015s}
Kd6 {-13.04/6 0.013s} 288. Ra4 {+13.21/6 0.036s} Ke7 {-11.62/6 0.017s}
289. Ra1 {+12.31/6 0.014s} Kf8 {-11.44/6 0.008s} 290. g5 {+12.11/6 0.009s}
Kg8 {-12.04/6 0.008s} 291. Nb4 {+11.81/6 0.016s} Kh7 {-12.39/6 0.008s}
292. Nd3 {+11.45/6 0.021s} Kg8 {-12.39/6 0.010s} 293. N3b2 {+11.99/6 0.015s}
Kh8 {-12.39/6 0.008s} 294. Na4 {+11.02/6 0.007s} Kg8 {-12.39/6 0.007s}
295. Kc1 {+11.36/6 0.018s} Kh8 {-11.71/6 0.008s} 296. Kb2 {+11.13/6 0.020s}
Kg7 {-11.71/6 0.009s} 297. Ra3 {+11.34/6 0.009s} Kf7 {-11.71/6 0.009s}
298. Kc1 {+10.88/6 0.018s} Kg7 {-11.71/6 0.008s} 299. Nab2 {+10.91/6 0.026s}
Kf8 {-11.87/6 0.013s} 300. Ra8+ {+11.22/6 0.026s} Kg7 {-11.87/6 0.006s}
301. Rg8+ {+12.07/6 0.019s} Kh7 {-11.87/6 0.012s} 302. Kb1 {+12.05/6 0.012s}
Kxg8 {-12.07/4 0.004s} 303. Ka2 {+12.22/6 0.008s} Kf7 {-12.07/6 0.016s}
304. Ne3 {+12.11/6 0.025s} Kg8 {-11.94/6 0.012s} 305. Nc2 {+12.27/6 0.017s}
Kf7 {-12.20/6 0.015s} 306. Ne1 {+12.07/6 0.026s} Kf8 {-12.11/6 0.011s}
307. Ned3 {+11.80/6 0.021s} Kf7 {-12.11/6 0.017s} 308. Nc4 {+11.97/6 0.027s}
Kf8 {-12.11/6 0.021s} 309. Nce5 {+12.58/6 0.025s} Ke8 {-12.20/6 0.014s}
310. Nf2 {+12.12/6 0.039s} Ke7 {-11.94/6 0.016s} 311. Ne4 {+12.02/6 0.039s}
Kd8 {-12.04/6 0.021s} 312. Nd2 {+12.29/6 0.044s} Ke7 {-12.11/6 0.013s}
313. Ndf3 {+12.11/6 0.041s} Ke8 {-12.00/6 0.014s} 314. Ng4 {+12.14/6 0.015s}
Ke7 {-11.85/6 0.027s} 315. Nf2 {+12.18/6 0.019s} Ke8 {-12.20/6 0.017s}
316. Nd2 {+12.21/6 0.030s} Kf7 {-12.03/6 0.024s} 317. Nde4 {+12.21/6 0.027s}
Kg7 {-12.04/6 0.022s} 318. Kb3 {+12.20/6 0.028s} Kf8 {-12.27/6 0.017s}
319. Kc4 {+12.32/6 0.030s} Ke7 {-12.25/6 0.014s} 320. Kd5 {+12.67/6 0.017s}
Kf7 {-12.80/6 0.021s} 321. Nd6+ {+12.98/6 0.032s} Ke7 {-12.64/6 0.015s}
322. Ke5 {+12.98/6 0.008s} Kf8 {-12.80/6 0.017s} 323. Nc4 {+12.83/6 0.021s}
Kg7 {-13.15/6 0.021s} 324. Nd3 {+12.82/6 0.025s} Kf8 {-13.02/6 0.021s}
325. Nb4 {+12.60/6 0.025s} Ke8 {-12.99/6 0.012s} 326. Nc2 {+12.74/6 0.037s}
Kf7 {-13.16/6 0.019s} 327. Nd2 {+12.50/6 0.031s} Kg8 {-13.15/6 0.015s}
328. Nf3 {+12.65/6 0.021s} Kh8 {-12.65/6 0.016s} 329. Ng1 {+12.94/6 0.021s}
Kg7 {-12.74/6 0.014s} 330. Na3 {+12.59/6 0.020s} Kg8 {-13.21/6 0.021s}
331. Nh3 {+12.83/6 0.023s} Kg7 {-12.78/6 0.012s} 332. Nc4 {+12.50/6 0.017s}
Kf8 {-12.95/6 0.014s} 333. Nb2 {+12.85/6 0.014s} Kg7 {-13.01/6 0.013s}
334. Na4 {+12.72/6 0.021s} Kf7 {-13.01/6 0.009s} 335. Ng1 {+12.59/6 0.013s}
Kg8 {-13.02/6 0.008s} 336. Nc3 {+12.60/6 0.014s} Kg7 {-12.67/6 0.012s}
337. Kd5 {+12.56/6 0.022s} Kh8 {-12.94/6 0.014s} 338. Nf3 {+12.56/6 0.026s}
Kg8 {-13.02/6 0.007s} 339. Ne5 {+12.50/6 0.021s} Kf8 {-12.75/6 0.013s}
340. Ng6+ {+13.11/6 0.028s} Kg8 {-13.09/6 0.010s} 341. Ke5 {+12.57/6 0.032s}
Kf7 {-13.01/6 0.008s} 342. Nb1 {+12.50/6 0.017s} Kg8 {-12.95/6 0.010s}
343. Nf4 {+12.50/6 0.014s} Kg7 {-13.01/6 0.008s} 344. Nd2 {+12.65/6 0.013s}
Kf7 {-13.01/6 0.009s} 345. Nc4 {+12.75/6 0.009s} Ke7 {-13.01/6 0.014s}
346. Nh5 {+12.93/6 0.022s} Ke8 {-12.88/6 0.014s} 347. Nf6+ {+13.01/6 0.022s}
Kf7 {-13.15/6 0.010s} 348. Nd2 {+12.52/6 0.033s} Kg7 {-13.15/6 0.017s}
349. Nb3 {+12.67/6 0.023s} Kf8 {-12.99/6 0.013s} 350. Ng4 {+12.50/6 0.027s}
Kf7 {-12.32/6 0.011s} 351. Nh6+ {+11.63/6 0.020s} Kg7 {-12.39/6 0.020s}
352. g6 {+12.04/6 0.021s} Kh8 {-12.00/6 0.015s} 353. Nf7+ {+13.51/6 0.022s}
Kg7 {-12.64/6 0.011s} 354. Ke4 {+10.82/6 0.017s} Kf6 {-12.34/6 0.007s}
355. Nd6 {+11.63/6 0.041s} Kg7 {-11.99/6 0.009s} 356. Nb5 {+11.43/6 0.030s}
Kf6 {-12.13/6 0.007s} 357. g7 {+11.41/6 0.014s} Kf7 {-11.64/6 0.029s}
358. g8=B+ {+11.92/6 0.034s} Kxg8 {-12.07/6 0.011s} 359. Ke5 {+12.17/6 0.008s}
Kf7 {-11.85/6 0.013s} 360. N3d4 {+12.23/6 0.018s} Ke7 {-11.90/6 0.021s}
361. Nc3 {+12.13/6 0.032s} Kd7 {-11.80/6 0.013s} 362. f6 {+12.78/6 0.029s}
Kc7 {-12.36/6 0.013s} 363. Ne6+ {+12.66/6 0.014s} Kd7 {-12.59/6 0.012s}
364. Ng7 {+13.68/6 0.022s} Kc7 {-12.46/6 0.011s} 365. Kf5 {+12.65/6 0.023s}
Kd6 {-12.56/6 0.016s} 366. Ne4+ {+12.61/6 0.040s} Kd5 {-12.50/6 0.013s}
367. Nd2 {+12.61/6 0.037s} Kd4 {-12.40/6 0.040s} 368. Nf3+ {+13.09/6 0.050s}
Kd5 {-12.91/6 0.016s} 369. Ne8 {+12.43/6 0.026s} Kc4 {-13.58/6 0.017s}
370. Nh4 {+13.51/6 0.032s} Kd3 {-12.18/6 0.028s} 371. Nc7 {+12.04/6 0.035s}
Ke2 {-12.78/6 0.020s} 372. Kg6 {+12.52/6 0.025s} Ke3 {-12.46/6 0.014s}
373. Nf5+ {+12.71/6 0.047s} Kf3 {-12.19/6 0.013s} 374. Nh6 {+11.80/6 0.035s}
Ke4 {-12.96/6 0.029s} 375. Ne6 {+12.24/6 0.007s} Kd3 {-12.41/6 0.028s}
376. Nf8 {+13.18/6 0.042s} Ke4 {-13.00/6 0.016s} 377. Nh7 {+12.98/6 0.029s}
Kf3 {-12.73/6 0.031s} 378. Nf5 {+14.09/6 0.019s} Kf4 {-13.43/6 0.015s}
379. Nf8 {+12.74/6 0.012s} Kf3 {-13.11/6 0.012s} 380. Nd7 {+12.79/6 0.027s}
Ke4 {-12.55/6 0.020s} 381. Ng3+ {+12.72/6 0.050s} Ke3 {-12.64/6 0.023s}
382. Ne5 {+13.25/6 0.041s} Kd4 {-12.78/6 0.024s} 383. Kf5 {+12.39/6 0.049s}
Kd5 {-12.81/6 0.018s} 384. Nh1 {+12.59/6 0.040s} Kd4 {-12.67/6 0.015s}
385. Nf7 {+12.14/6 0.006s} Kd3 {-12.76/6 0.011s} 386. Nf2+ {+12.86/6 0.027s}
Kd4 {-12.85/6 0.021s} 387. Nh3 {+12.30/6 0.047s} Kd5 {-13.18/6 0.018s}
388. Nhg5 {+12.74/6 0.022s} Kd4 {-13.32/6 0.018s} 389. Nf3+ {+12.81/6 0.037s}
Kc3 {-12.79/6 0.020s} 390. Nh6 {+13.14/6 0.018s} Kc2 {-12.60/6 0.015s}
391. Ng8 {+12.32/6 0.030s} Kb1 {-13.26/6 0.025s} 392. Ng1 {+13.97/6 0.027s}
Kc1 {-13.38/6 0.012s} 393. Nh3 {+13.66/6 0.022s} Kc2 {-13.48/6 0.011s}
394. Nf4 {+12.83/6 0.022s} Kd2 {-13.51/6 0.017s} 395. Ke6 {+13.56/6 0.028s}
Ke3 {-13.57/6 0.019s} 396. Nd5+ {+12.74/6 0.024s} Kf3 {-12.95/6 0.007s}
397. Nge7 {+12.29/6 0.017s} Kg2 {-12.74/6 0.028s} 398. Nb4 {+14.04/6 0.033s}
Kf3 {-13.22/6 0.013s} 399. Ng6 {+12.57/6 0.024s} Kg3 {-12.64/6 0.016s}
400. Na6 {+13.17/6 0.015s} Kg2 {-12.64/6 0.010s} 401. Kf5 {+13.85/6 0.031s}
Kf1 {-12.41/6 0.011s} 402. f7 {+12.15/6 0.015s} Kg1 {-13.23/6 0.014s}
403. Ke6 {+10.63/6 0.020s} Kh2 {-13.39/6 0.009s} 404. Kd7 {+11.06/6 0.022s}
Kg3 {-13.12/6 0.009s} 405. Nf8 {+10.55/6 0.020s} Kh3 {-14.36/6 0.010s}
406. Kd6 {+10.33/6 0.017s} Kg2 {-14.45/6 0.010s} 407. Ke6 {+10.32/6 0.007s}
Kh2 {-13.35/6 0.009s} 408. Ng6 {+10.63/6 0.023s} Kh1 {-9.74/6 0.008s}
409. Nc7 {+10.29/6 0.019s} Kg2 {-13.43/6 0.013s} 410. Nf4+ {+12.60/6 0.033s}
Kh2 {-13.27/6 0.025s} 411. Nd3 {+10.55/6 0.018s} Kg1 {-10.70/6 0.015s}
412. Nc5 {+10.47/6 0.014s} Kg2 {-13.45/6 0.008s} 413. Na4 {+11.38/6 0.025s}
Kg3 {-13.44/6 0.014s} 414. Nc3 {+10.55/6 0.025s} Kf4 {-13.02/6 0.006s}
415. N3d5+ {+12.05/6 0.038s} Kg5 {-12.95/6 0.009s} 416. Ne7 {+10.09/6 0.032s}
Kg4 {-13.65/6 0.012s} 417. Nf5 {+10.94/6 0.025s} Kh5 {-11.67/6 0.011s}
418. Nh4 {+9.98/6 0.036s} Kg4 {-11.03/6 0.013s} 419. Ng2 {+11.13/6 0.010s}
Kh5 {-10.58/6 0.029s} 420. Ne1 {+9.60/6 0.021s} Kh6 {-10.11/6 0.008s}
421. Nc2 {+8.77/6 0.022s} Kg6 {-8.67/6 0.013s} 422. Na3 {+9.35/6 0.020s}
Kg7 {-13.03/6 0.011s} 423. Nc4 {+9.34/6 0.018s} Kh7 {-13.03/6 0.010s}
424. f8=R {+11.34/6 0.023s} Kg7 {-10.53/6 0.009s} 425. Rb8 {+8.40/6 0.011s}
Kg6 {-10.53/6 0.010s} 426. Nb2 {+10.15/6 0.029s} Kh5 {-10.78/6 0.008s}
427. Nb5 {+10.73/6 0.026s} Kg6 {-10.81/6 0.012s} 428. Kd5 {+9.36/6 0.035s}
Kg5 {-11.04/6 0.020s} 429. Rf8 {+9.96/6 0.026s} Kh5 {-11.04/6 0.025s}
430. Nc3 {+9.96/6 0.049s} Kh4 {-10.41/6 0.028s} 431. Ke6 {+9.85/6 0.051s}
Kg5 {-9.67/6 0.016s} 432. Rf5+ {+9.13/6 0.044s} Kh6 {-8.94/6 0.013s}
433. Kd5 {+8.86/6 0.017s} Kg7 {-10.62/6 0.011s} 434. Kd4 {+9.22/6 0.011s}
Kh6 {-10.62/6 0.011s} 435. Rf2 {+9.67/6 0.040s} Kg5 {-9.40/6 0.020s}
436. Nba4 {+8.94/6 0.057s} Kg4 {-9.45/6 0.015s} 437. Ra2 {+8.93/6 0.045s}
Kg3 {-9.13/6 0.015s} 438. Kc5 {+9.47/6 0.014s} Kf4 {-9.52/6 0.015s}
439. Kb4 {+9.58/6 0.027s} Ke3 {-9.87/6 0.015s} 440. Ka3 {+9.74/6 0.069s}
Kf4 {-9.94/6 0.024s} 441. Re2 {+10.31/6 0.030s} Kf3 {-10.43/6 0.012s}
442. Rc2 {+10.21/6 0.053s} Ke3 {-10.14/6 0.019s} 443. Nb1 {+10.30/6 0.039s}
Kd3 {-9.98/6 0.021s} 444. Kb3 {+10.17/6 0.031s} Ke3 {-10.03/6 0.018s}
445. Nc5 {+10.53/6 0.032s} Kd4 {-10.64/6 0.017s} 446. Ka2 {+10.45/6 0.047s}
Kd5 {-10.78/6 0.025s} 447. Nb3 {+10.59/6 0.055s} Ke4 {-10.46/6 0.012s}
448. Rd2 {+10.59/6 0.037s} Kf3 {-10.33/6 0.014s} 449. Nc5 {+10.76/6 0.012s}
Ke3 {-10.33/6 0.008s} 450. Rh2 {+10.59/6 0.033s} Kd4 {-10.29/6 0.020s}
451. Na4 {+10.56/6 0.045s} Kc4 {-10.59/6 0.023s} 452. Nb2+ {+10.59/6 0.048s}
Kb5 {-10.59/6 0.009s} 453. Rh4 {+10.50/6 0.040s} Ka5 {-10.69/6 0.016s}
454. Ra4+ {+10.71/6 0.035s} Kb6 {-10.92/6 0.006s} 455. Rb4+ {+10.50/6 0.028s}
Kc7 {-10.69/6 0.009s} 456. Nd3 {+10.73/6 0.026s} Kd6 {-10.61/6 0.013s}
457. Rc4 {+10.50/6 0.064s} Ke7 {-10.70/6 0.019s} 458. Ne1 {+10.77/6 0.042s}
Kf8 {-10.77/6 0.013s} 459. Nf3 {+10.80/6 0.030s} Ke7 {-10.74/6 0.009s}
460. Rd4 {+10.94/6 0.041s} Ke6 {-10.47/6 0.014s} 461. Ka3 {+10.47/6 0.088s}
Kf7 {-10.47/6 0.017s} 462. Re4 {+10.89/6 0.070s} Kg8 {-10.94/6 0.013s}
463. Ka2 {+11.06/6 0.017s} Kg7 {-10.94/6 0.009s} 464. Rh4 {+10.92/6 0.025s}
Kf8 {-10.77/6 0.007s} 465. Rb4 {+10.85/6 0.026s} Ke7 {-10.57/6 0.010s}
466. Rb6 {+10.70/6 0.033s} Kd7 {-10.62/6 0.010s} 467. Nd4 {+10.57/6 0.047s}
Kc7 {-10.58/6 0.016s} 468. Rb5 {+10.63/6 0.025s} Kd6 {-10.63/6 0.031s}
469. Nb3 {+10.81/6 0.037s} Kc6 {-10.82/6 0.013s} 470. Rb4 {+11.03/6 0.010s}
Kd6 {-10.82/6 0.019s} 471. Na1 {+10.87/6 0.035s} Ke7 {-10.79/6 0.012s}
472. Rg4 {+2.39/6 0.035s} Kf7 {-2.28/6 0.010s} 473. Rg7+ {+2.42/6 0.016s}
Kxg7 {-2.25/6 0.008s} 474. Ka3 {+2.42/6 0.007s} Kh6 {-2.26/6 0.009s}
475. Nc3 {+2.11/6 0.014s} Kh5 {-2.34/6 0.010s} 476. Ka2 {+2.17/6 0.024s}
Kg4 {-2.06/6 0.013s} 477. Nb3 {+2.38/6 0.022s} Kf5 {-2.34/6 0.021s}
478. Nd2 {+2.25/6 0.023s} Ke6 {-2.38/6 0.013s} 479. Kb1 {+2.28/6 0.027s}
Kf6 {-2.38/6 0.028s} 480. Kc2 {+2.45/6 0.023s} Kg5 {-2.47/6 0.027s}
481. Kd1 {+2.61/6 0.035s} Kg6 {-2.68/6 0.014s} 482. Ke1 {+2.68/6 0.034s}
Kf6 {-2.73/6 0.020s} 483. Nb3 {+2.68/6 0.029s} Ke6 {-2.77/6 0.017s}
484. Nc5+ {+2.70/6 0.036s} Kd6 {-2.36/6 0.021s} 485. N5e4+ {+2.68/6 0.012s}
Ke5 {-2.47/6 0.012s} 486. Ng3 {+2.68/6 0.020s} Kd4 {-2.67/6 0.011s}
487. Nce2+ {+2.54/6 0.032s} Kd5 {-2.73/6 0.006s} 488. Nf4+ {+2.62/6 0.026s}
Ke5 {-2.35/6 0.015s} 489. Nge2 {+2.64/6 0.021s} Kd6 {-2.65/6 0.012s}
490. Kd1 {+2.70/6 0.019s} Ke5 {-2.70/6 0.015s} 491. Nd3+ {+2.82/6 0.014s}
Kf6 {-2.59/6 0.014s} 492. Ke1 {+2.73/6 0.030s} Kf7 {-2.66/6 0.021s}
493. Ne5+ {+2.84/6 0.019s} Ke6 {-2.77/6 0.010s} 494. Nf3 {+2.70/6 0.011s}
Kf7 {-2.77/6 0.012s} 495. Kd2 {+2.73/6 0.021s} Kf6 {-2.86/6 0.012s}
496. Ke3 {+2.85/6 0.029s} Kf5 {-2.80/6 0.028s} 497. Nf4 {+3.06/6 0.035s}
Kf6 {-2.96/6 0.012s} 498. Ke4 {+3.09/6 0.025s} Ke7 {-3.32/6 0.015s}
499. Nd3 {+3.01/6 0.034s} Kf6 {-2.89/6 0.023s} 500. Ng1 {+2.87/6 0.027s}
Kg6 {-2.82/6 0.017s} 501. Ke3 {+2.92/6 0.024s} Kg5 {-2.89/6 0.016s}
502. Nf3+ {+2.98/6 0.023s} Kf5 {-2.82/6 0.012s} 503. Nc1 {+2.98/6 0.020s}
Ke6 {-2.55/6 0.018s} 504. Ke4 {+2.92/6 0.026s} Kf6 {-2.94/6 0.025s}
505. Ne2 {+2.92/6 0.020s} Ke6 {-2.94/6 0.016s} 506. Ne1 {+2.91/6 0.022s}
Ke7 {-2.89/6 0.009s} 507. Nd3 {+2.89/6 0.019s} Kf6 {-2.89/6 0.005s}
508. Ke3 {+2.89/6 0.021s} Kf5 {-2.77/6 0.013s} 509. Nd4+ {+2.81/6 0.026s}
Kf6 {-2.89/6 0.016s} 510. Ke4 {+2.82/6 0.015s} Kg6 {-2.94/6 0.012s}
511. Ke5 {+2.87/6 0.020s} Kg5 {-3.23/6 0.012s} 512. Ne1 {+2.81/6 0.024s}
Kh4 {-2.82/6 0.015s} 513. Kf4 {+2.94/6 0.024s} Kh5 {-2.94/6 0.008s}
514. Nef3 {+2.94/6 0.016s} Kg6 {-2.94/6 0.011s} 515. Ke5 {+3.10/6 0.023s}
Kf7 {-3.37/6 0.016s} 516. Nh4 {+3.14/6 0.021s} Kg7 {-3.32/6 0.014s}
517. Kf5 {+3.11/6 0.029s} Kh6 {-3.89/6 0.011s} 518. Ne6 {+4.06/6 0.013s}
Kh5 {-4.06/6 0.005s} 519. Ng2 {+4.33/6 0.010s} Kh6 {-3.77/4 0.005s}
520. Ngf4 {+4.16/6 0.013s} Kh7 {-7.35/4 0.006s} 521. Kg5 {+4.36/6 0.012s}
Kg8 {-4.10/6 0.006s} 522. Kf6 {0.00/6 0.009s} Kh7 {0.00/6 0.005s}
523. Ke5 {0.00/6 0.005s} Kh6 {0.00/6 0.005s, Draw by fifty moves rule} 1/2-1/2