Author: Robert Hyatt
Date: 18:06:00 06/21/99
Go up one level in this thread
On June 21, 1999 at 19:33:12, Dann Corbit wrote: >On June 21, 1999 at 18:25:42, Vincent Lejeune wrote: > >>I dont have acces to EGTB >> >>Here's a position >> >>1R6/1P6/8/1r4p1/4p3/6k1/2K5/8 w - - >> >>Where analyse without tablebase are completelty useless >> >>Thanks for who can analyse that >Even with tablebase files, it will be tough, because there are more than 5 men >on the board. Also, since there is no checkmate for at least 20 plies distant, >I don't think any chess program will solve it. Here is the output from H. >Marxen's chess problem solver: > Note that for Crafty, you don't have to start with 5 pieces, you only have to _end_ with 5 pieces. I have seen positions with 16 (or even more) pieces on the board, with crafty reporting sporadic endgame tablebase hits... And have seen positions with 12 pieces on the board where it announced a deep mate as it found a way to force trading down to 4-5 pieces... >Reading job: >W: Kc2 Rb8 Pb7 (3) >B: Kg3 Rb5 Pe4 Pg5 (4) >FEN: 1R6/1P6/8/1r4p1/4p3/6k1/2K5/8 w - - >analysing (mate in 10 moves): >No solution in 10 moves. >refu 1: Rc8 Ra5 [ 9-] >solu 1: Rb2+ [ 8+] >solu 2: Rc5+ [ 7+] >refu 2: Rd8 Rc5+ [ 9-] >refu 3: Re8 Rc5+ [ 9-] >refu 4: Rf8 Rc5+ [ 9-] >refu 5: Rg8 Rc5+ [ 9-] >refu 6: Rh8 Rc5+ [ 9-] >refu 7: Ra8 Rc5+ [ 9-] >refu 8: Kd2 Rb2+ [ 9-] >refu 9: Kc3 Rc5+ [ 9-] >refu 10: Kc1 Rc5+ [ 9-] >refu 11: Kd1 Rb1+ [ 10-] >Time (user) = 944.00 sec (ca. 15.7 min)
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