Author: Ricardo Gibert
Date: 16:45:04 01/07/03
Go up one level in this thread
On January 07, 2003 at 19:29:49, Marc Bourzutschky wrote: >The KRRPKQ ending features some extremely subtle play. In the position below >White can win, but it takes 165 moves of manoevering before he can move his >pawn from the starting square. And even after he can finally move his pawn >play is still very difficult. This breaks the record of 130 moves set by >KBBPKR which I posted a few weeks ago. What's subtle about it? Black draws easily thanks to the 50-move rule rendering most of this analysis as irrelevant. > >The ending was generated with Johan de Koning's program FEG, which can be >downloaded from www.chessmaster.com. It took just over a week on P4/1.9GHz. > >[D] q7/k7/8/1R6/8/8/2R2P1K/8 b > >[Event "?"] >[Site "?"] >[Date "????.??.??"] >[Round "?"] >[White "?"] >[Black "?"] >[Result "1-0"] >[Annotator "FEG"] >[SetUp "1"] >[FEN "q7/k7/8/1R6/8/8/2R2P1K/8 b - - 0 1"] >[PlyCount "506"] >[EventDate "2003.01.08"] > >1... Qh8+ 2. Kg2 $1 Qg7+ 3. Kf1 $1 Qa1+ 4. Ke2 $1 Qa4 5. Rcb2 $1 Qe4+ 6. Kd1 $1 >Qd3+ 7. Ke1 $1 Qc3+ 8. Ke2 $1 Qc4+ 9. Ke3 Qc3+ 10. Kf4 Qf6+ 11. Kg4 Qd4+ 12. >Kg3 (12. f4 $2 Qd1+ $1 $11) 12... Qg7+ 13. Kf3 Qf7+ 14. Ke3 Qe6+ 15. Kd2 Qh6+ >16. Ke2 Qe6+ 17. Kd1 Qg4+ 18. Ke1 Qe4+ 19. Re2 Qc4 20. Re7+ $1 Ka6 21. Rbe5 $1 >Qb4+ 22. Ke2 Qg4+ 23. Ke3 Qh3+ 24. Kd2 (24. f3 $2 Qg3 $11) 24... Qh4 25. R7e6+ >Ka7 26. Ra5+ Kb7 27. Rb5+ $1 Ka7 28. Ke1 Qc4 29. Ra5+ Kb7 30. Rae5 Qb4+ 31. Ke2 >Qg4+ 32. Ke3 (32. f3 $2 Qg2+ $11) 32... Qh3+ 33. Kd2 (33. f3 $2 Qg3 $11) 33... >Qh4 34. Re2 Qd4+ 35. Kc2 Qc4+ 36. Kb1 Qd3+ 37. Rc2 Qd1+ 38. Kb2 $1 Qd4+ 39. Kc1 >Qa1+ 40. Kd2 Qa5+ 41. Ke3 Qg5+ 42. Kd4 $1 (42. f4 $2 Qg3+ $11) 42... Qd8+ 43. >Ke4 Qd7 44. Rec6 $1 Qg4+ 45. Ke5 (45. f4 $2 Qh4 $1 $11) 45... Qg5+ 46. Kd4 Qg7+ >47. Kc5 Qa1 48. Rb6+ (48. f4 $2 Qa5+ $11) 48... Ka7 49. Rb4 Ka6 50. Rbc4 Qe5+ >51. Kb4 Qa5+ 52. Kb3 Qd5 53. Kc3 (53. f4 $2 Qf3+ $11) 53... Qe5+ 54. Kd2 Qd5+ >55. Kc1 Qh1+ 56. Kb2 Qb7+ 57. Ka3 Qe7+ 58. Ka4 Qd7+ 59. Rc6+ Ka7 60. Ka3 Kb7 >61. Kb4 Qd5 62. Rc7+ Kb8 63. R7c5 Qe4+ 64. Ka3 Qa8+ 65. Kb2 Qb7+ 66. Kc1 Qh1+ >67. Kd2 Qh6+ 68. Ke2 Qe6+ 69. Kd1 Qg4+ 70. Kc1 $1 Kb7 71. R5c3 Qg1+ 72. Kb2 Qd1 >73. Re3 Kb6 74. Kc3 (74. f3 $2 Qd4+ $11) 74... Kc5 75. Rd3 Qe1+ 76. Kb2+ Kb5 >77. Rcd2 (77. f4 $2 Qe4 $1) (77. f3 $2 Qe5+ $11) 77... Qe4 78. Kc1 Qg4 79. Rd4 >Qf3 80. Rd5+ Kc4 81. Rg5 $1 Qh1+ 82. Kc2 Qe4+ 83. Kd1 Qf3+ 84. Ke1 Qh1+ 85. Ke2 >Qe4+ 86. Kf1 Qh1+ 87. Rg1 Qh3+ 88. Ke1 Qe6+ 89. Kd1 Qh3 90. Rg3 Qf1+ 91. Kc2 >Kb4 92. Rg4+ (92. f3 $2 Qc4+ $11) 92... Kc5 93. Rf4 (93. f4 $2 Qf3 $11) 93... >Qa1 94. Rd3 (94. f3 $2 Qe5 $11) 94... Qa2+ 95. Kd1 Qa1+ 96. Kd2 Qb2+ 97. Ke3 >Qe5+ 98. Re4 Qg5+ 99. Ke2 (99. f4 $2 Qg3+ $11) 99... Qh5+ 100. Rf3 Kc6 101. >Rc4+ Kd7 102. Rcf4 Ke6 103. Rf6+ Kd7 104. R6f5 Qh4 105. R3f4 Qh6 106. Rd5+ Ke6 >107. Rff5 Qh7 108. Rde5+ Kd6 109. Rg5 Qb1 110. Re3 (110. f3 $2 Qc2+ $11) (110. >f4 $2 Qb3 $11) 110... Qh7 111. Rgg3 Qh5+ 112. Ref3 Ke7 113. Rh3 Qb5+ 114. Rd3 >Qb1 115. Rb3 (115. f4 $2 Qc2+ $11) (115. f3 $2 Qc2+ $11) 115... Qc1 116. Rbe3+ >Kd6 117. Rh4 (117. f3 $2 Qc2+ $11) 117... Kd5 118. Ree4 (118. f3 $2 Qc2+ $11) >118... Kd6 119. Rc4 Qb1 120. Rhe4 Kd5 121. Rcd4+ Kc5 122. Rh4 (122. f4 $2 Qc2+ >$11) (122. f3 $2 Qc2+ $11) 122... Qb5+ 123. Rc4+ Kd6 124. Kf1 (124. f3 $2 Qe5+ >$11) 124... Qb1+ 125. Kg2 Qb7+ 126. Rce4 (126. f3 $2 Qg7+ $11) 126... Qd5 127. >Kg3 (127. f3 $2 Qg8+ $11) 127... Qa5 128. Rd4+ (128. f4 $2 Qc3+ $1 $11) (128. >f3 $2 Qg5+ $11) 128... Kc6 129. Rhg4 (129. f3 $2 Qg5+ $11) 129... Qf5 130. Rdf4 >(130. f4 $2 Qc2 $11) (130. f3 $2 Qe5+ $11) 130... Qh5 131. Rg7 (131. f3 $2 Kd5 >$11) 131... Kd5 132. Kg2 (132. f3 $2 Ke5 $11) 132... Ke6 133. Rd4 (133. f3 $2 >Qh6 $11) 133... Qc5 134. Rg6+ Ke7 135. Rd3 Qf5 136. Rgg3 Qe4+ 137. Rdf3 Qd5 >138. Kg1 Qa5 139. Re3+ Kd6 140. Rd3+ (140. f4 $2 Qf5 $11) (140. f3 $2 Qf5 $11) >140... Kc6 141. Rg6+ (141. f3 $4 Qe1+ $19) (141. f4 $2 Qe1+ $11) 141... Kc7 >142. Rd1 Qf5 143. Rg7+ Kc6 144. Rc1+ Kd6 145. Ra1 Qd3 146. Rg5 Qd4 147. Ra3 Qf4 >148. Rag3 Qe4 149. Rg6+ (149. f3 $2 Qe1+ $11) 149... Kd7 150. Rg7+ Kd6 151. >R7g5 (151. f3 $2 Qe1+ $11) 151... Kd7 152. Re3 (152. f3 $2 Qe1+ $11) 152... Qf4 >153. Ree5 Qf3 154. Rg3 Qf6 155. Rd3+ Kc6 156. Rdd5 Qf3 157. Rg5 Qh3 158. Ra5 >Kd7 159. Rg7+ Ke6 160. Rg6+ Kf7 161. Rg3 Qh8 162. Kg2 (162. f3 $2 Qd4+ $11) >162... Kf6 163. Rgg5 (163. f4 $2 Qh4 $11) (163. f3 $2 Qh4 $11) 163... Qh4 164. >Rgf5+ Ke6 165. Rae5+ (165. f3 $2 Qd4 $11) 165... Kd7 166. f3 (166. f4 $2 Qg4+ >$11) 166... Kd6 167. Re4 Qh6 168. Rfe5 Qf6 169. Kg3 (169. f4 $2 Qg6+ $11) >169... Qg6+ 170. Kh4 Qf6+ 171. Kg4 Qg7+ 172. Rg5 Qd7+ 173. Kg3 Qa7 174. Rf5 >Qg7+ 175. Rg4 Qa1 176. Rgf4 Qg7+ 177. Kh4 Qh6+ 178. Kg4 Qe6 179. Kh5 Qe8+ 180. >Kh4 Qd8+ 181. Rg5 Qh8+ 182. Kg4 Qh6 183. Rff5 Ke6 184. f4 Ke7 185. Re5+ Kf7 >186. Rgf5+ Kg8 187. Re8+ Kg7 188. Re7+ Kg8 189. Rd5 Kf8 190. Red7 Qg6+ 191. Kf3 >Qc2 192. Rd8+ Kf7 193. R5d7+ $1 Kg6 194. Rd2 Qf5 195. Kg3 $1 Kf7 196. R2d7+ Ke6 >197. Rd5 Qg6+ 198. Kf3 Qc2 199. Rd3 Kf5 200. Kg3 Qb1 201. R3d5+ $1 Kf6 202. >R5d6+ $1 Kg7 203. R8d7+ Kh8 204. Rd5 Qg1+ 205. Kh4 Qf2+ 206. Kg5 Qg3+ 207. Kf5 >Qh3+ 208. Kf6 Qh4+ 209. Ke5 Qe1+ 210. Kf5 Qc3 211. Kg6 Qg7+ 212. Kh5 Qc3 213. >Rd8+ Kg7 214. R5d7+ Kf6 215. Rf8+ Ke6 216. Rdf7 Qf3+ 217. Kg6 Qg4+ 218. Kh7 >Qh3+ 219. Kg8 Qg2+ 220. Rg7 Qa2 221. Rg5 Ke7+ 222. Kg7 Qa1+ 223. Re5+ Kd7 224. >Rf7+ Kd6 225. Rf6+ Kd7 226. Rb5 Qg1+ 227. Kf8 Qh2 228. Rb7+ Kd8 229. Kg8 Qg3+ >230. Rg7 Qb3+ 231. Rgf7 Qg3+ 232. Kf8 Qa3+ 233. Kg7 Qg3+ 234. Rg6 Qc3+ 235. Kg8 >Ke8 236. f5 Qc4 237. Re6+ Kd8 238. Kf8 Qc5+ 239. Ree7 Qd6 240. f6 Qc6 241. Ra7 >Qh1 242. Kg8 Qg2+ 243. Rg7 Qd5+ 244. f7 Qe6 245. Ra6 Qc4 246. Rf6 Kd7 247. Rgg6 >Qd5 248. Kg7 Qc4 249. f8=Q Qc3 250. Qd6+ Ke8 251. Qc6+ Qxc6 252. Rxc6 Kd7 253. >Kf8 Kd8 254. Rgd6# 1-0
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