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Chess World Online Chess Forum - Problem: Mate in 208....That's long!

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  Play ... Latest Forum Posts > Chess Forums > Chess compositions
  Problem: Mate in 208....That's long!

Philip

Chess rating: 2238
LCF 160 Fide approx. 2050






 Topics started


England
Give chess goodie
Chess goodies: 13
Sun Dec 23 2007 12:06PM | MsgID: 8272732


An interesting problem! Actually I think this position IS legal. This is normally a requirement for all puzzles and problems. Black would only need to make 8 (not 10) captures for his pawns to end up in their current positions:

b to a = 1
c to a = 2
d to c = 1
e to c = 2
f to h = 2

These captures could have involved the missing 8 white pieces but unfortunately neither white's e or f pawns could have been captured on the d or c files (black has only lost 2 pieces and his black squared bishop was obviously captured on c3). I think the only explanation is that white promoted his e and f pawns and the resulting pieces were captured by black pawns. It should thus be possible to construct a (very strange) game score which reaches this position - but I doubt if it would satisfy the first responder in this thread



Nekthen

Chess rating: 2214



 Topics started


United Kingdom
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Chess goodies: 8
Sun Dec 23 2007 10:05AM | MsgID: 8272106


Hmmm. Given Black's pawns I think Black must have captured 10 white pieces. This seems to be an issue as white has 8 pieces left!

On the other hand, so what? It is a composition not a game. It is Christmas, traditionally this is the time for light hearted puzzles.



sassafrass

Chess rating: 2825



 Topics started


United States
Give chess goodie
Sun Dec 23 2007 4:41AM | MsgID: 8271268


Hi there,
If you can give a gamescore that leads to this position, then it might be worth
looking at. If you cannot. Why would we take the time to examine it at all?
Best wishes, sassa



Tartcover

Chess rating: 2247





 Topics started


Canada
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Chess goodies: 4
Sun Dec 23 2007 3:53AM | edited: 4:06:29 | MsgID: 8271176


André Chéron
Journal de Genève 1979







Analyse position


Mate in 208 moves!

This is not a solution to find, just play through it....

[[1. Qg8+ Ke4 2. Qc4+ Kxe5 3. Qe6+ Kf4 4. Bh2+ Kf3 5. Qe3+ Kg2 6. Qg1+ Kf3 7. Qf1+ Kg4 8. Qe2+ Rf3 9. Qe6+ Rf5 10. Nd7 10... Kf3 11. Qe3+ Kg2 12. Qg1+ Kf3 13. Qf1+ Kg4 14. Qe2+ Rf3 15. Qe6+ Rf5 16.Kb2 Kf3 17. Qe3+ Kg2 18. Qg1+ Kf3 19. Qf1+ Kg4 20. Qe2+ Rf3 21. Qe6+ Rf5 22. Kc1
Kf3 23. Qe3+ Kg2 24. Qg1+ Kf3 25. Qf1+ Kg4 26. Qe2+ Rf3 27. Qe6+ Rf5 28. Kd1 a4 29. Kc1 Kf3 30. Qe3+ Kg2 31. Qg1+ Kf3 32. Qf1+ Kg4
33. Qe2+ Rf3 34. Qe6+ Rf5 35. Kd1 a5 36. Kc1 Kf3 37. Qe3+ Kg2 38. Qg1+
Kf3 39. Qf1+ Kg4 40. Qe2+ Rf3 41. Qe6+ Rf5 42. Kd1 a6 43. Kc1 Kf3 44. Qe3+ Kg2
45. Qg1+ Kf3 46. Qf1+ Kg4 47. Qe2+ Rf3 48. Qe6+ Rf5 49. Kd1 c4 50. Kc1 Kf3 51.
Qe3+ Kg2 52. Qg1+ Kf3 53. Qf1+ Kg4 54. Qe2+ Rf3 55. Qe6+ Rf5 56. Kd1 c5 57. Kc1
Kf3 58. Qe3+ Kg2 59. Qg1+ Kf3 60. Qf1+ Kg4 61. Qe2+ Rf3 62. Qe6+ Rf5 63. Kd1 a3
64. Kc1 Kf3 65. Qe3+ Kg2 66. Qg1+ Kf3 67. Qf1+ Kg4 68. Qe2+ Rf3 69. Qe6+ Rf5 70.
Kb1 Kf3 71. Qe3+ Kg2 72. Qg1+ Kf3 73. Qf1+ Kg4 74. Qe2+ Rf3 75. Qe6+ Rf5 76. Ka2
Kf3 77. Qe3+ Kg2 78. Qg1+ Kf3 79. Qf1+ Kg4 80. Qe2+ Rf3 81. Qe6+ Rf5 82. Kxa3
Kf3 83. Qe3+ Kg2 84. Qg1+ Kf3 85. Qf1+ Kg4 86. Qe2+ Rf3 87. Qe6+ Rf5 88. Kb2 Kf3
89. Qe3+ Kg2 90. Qg1+ Kf3 91. Qf1+ Kg4 92. Qe2+ Rf3 93. Qe6+ Rf5 94. Kc1 Kf3 95.
Qe3+ Kg2 96. Qg1+ Kf3 97. Qf1+ Kg4 98. Qe2+ Rf3 99. Qe6+ Rf5 100. Kd1 a4 101.
Kc1 Kf3 102. Qe3+ Kg2 103. Qg1+ Kf3 104. Qf1+ Kg4 105. Qe2+ Rf3 106. Qe6+ Rf5
107. Kd1 a5 108. Kc1 Kf3 109. Qe3+ Kg2 110. Qg1+ Kf3 111. Qf1+ Kg4 112. Qe2+ Rf3
113. Qe6+ Rf5 114. Kd1 a3 115. Kc1 Kf3 116. Qe3+ Kg2 117. Qg1+ Kf3 118. Qf1+ Kg4
119. Qe2+ Rf3 120. Qe6+ Rf5 121. Kb1 Kf3 122. Qe3+ Kg2 123. Qg1+ Kf3 124. Qf1+
Kg4 125. Qe2+ Rf3 126. Qe6+ Rf5 127. Ka2 Kf3 128. Qe3+ Kg2 129. Qg1+ Kf3 130.
Qf1+ Kg4 131. Qe2+ Rf3 132. Qe6+ Rf5 133. Kxa3 Kf3 134. Qe3+ Kg2 135. Qg1+ Kf3
136. Qf1+ Kg4 137. Qe2+ Rf3 138. Qe6+ Rf5 139. Kb2 Kf3 140. Qe3+ Kg2 141. Qg1+
Kf3 142. Qf1+ Kg4 143. Qe2+ Rf3 144. Qe6+ Rf5 145. Kc1 Kf3 146. Qe3+ Kg2 147.
Qg1+ Kf3 148. Qf1+ Kg4 149. Qe2+ Rf3 150. Qe6+ Rf5 151. Kd1 a4 152. Kc1 Kf3 153.Qe3+ Kg2 154. Qg1+ Kf3 155. Qf1+ Ke4 156. Qxc4+ Kf3 157. Qf1+ Kg4 158. Qe2+ Rf3 159. Qe6+ Rf5 160. Kd1 c4
161. Kc1 Kf3 162. Qe3+ Kg2 163. Qg1+ Kf3 164. Qf1+ Kg4 165. Qe2+ Rf3 166. Qe6+ Rf5 167. Kd1 a3 168. Kc1 Kf3 169. Qe3+ Kg2 170. Qg1+ Kf3 171. Qf1+ Kg4 172. Qe2+ Rf3 173. Qe6+ Rf5 174. Kb1 Kf3 175. Qe3+ Kg2 176. Qg1+ Kf3 177. Qf1+ Kg4 178. Qe2+ Rf3 179. Qe6+ Rf5 180. Ka2 Kf3 181. Qe3+ Kg2 182. Qg1+ Kf3 183. Qf1+ Kg4 184. Qe2+ Rf3 185. Qe6+ Rf5 186. Kxa3 Kf3 187.Qe3+ Kg2 188. Qg1+ Kf3 189. Qf1+ Kg4 190. Qe2+ Rf3 191. Qe6+ Rf5 192.Kb2 Kf3 193. Qe3+ Kg2 194. Qg1+ Kf3 195. Qf1+ Kg4 196. Qe2+ Rf3 197. Qe6+ Rf5 198. Kc1 Kf3 199. Qe3+ Kg2 200. Qg1+ Kf3 201. Qf1+ Kg4 202. Qxc4+ Kf3 203. Qf1+ Kg4 204. Qe2+ Rf3 205. Qe6+ Rf5 206. Kd1 Nd6 207. Nf6+ Kf3 208. Qe2#] 207. Nxf6+ Kf3 208. Qe2#]]

The whole idea is based on the triangular cycle of the queen checks, and after each cycle, the white kings can make a move because of the gained tempo.

Playable game scores in this posting
Playable game fragment #1