Author: José Carlos
Date: 10:33:18 04/20/04
Go up one level in this thread
On April 20, 2004 at 13:20:10, Heiner Marxen wrote: >On April 20, 2004 at 12:51:06, José Carlos wrote: > >>On April 20, 2004 at 12:35:06, Janos Keinrath wrote: >> >>>Here is a position, where you can test your engine zugzwang detection. >>>[D]8/8/8/2p5/1pp5/brpp4/1pprp2P/qnkbK3 w - - >>> >>>The solution is 1.h3 mate in 15. (1.h4? only draw) >>>Crafty can't solve this after reaching depth 60. >> >> Are you sure this is a null move issue? Averno finds h3 pretty quickly, and >>its null move is not partilarly smart :) >> >>Averno v0.72hi WB2 37 MB: >> 2 00:00 -59.00 h2h4 a1a2 >> 3 00:00 -58.85 h2h4 a1a2 h4h5 >> 4 00:00 -58.95 h2h4 a1a2 h4h5 a2a1 >> 5 00:00 -57.75 h2h4 >> 5 00:00 -55.75 h2h4 >> 5 00:00 -55.75 h2h4 a1a2 e1f2 e2e1Q f2e1 d1f3 >> 5 00:00 -55.00 h2h3 a1a2 e1f2 e2e1R f2e1 d1f3 >> 6 00:00 -55.65 h2h3 a1a2 >> 6 00:00 -58.85 h2h3 a1a2 >> 6 00:00 -58.85 h2h3 a1a2 h3h4 a2a1 h4h5 a1a2 >> 6 00:00 -57.65 h2h4 a1a2 h4h5 a2a1 h5h6 a1a2 >> 7 00:00 -53.15 h2h4 >> 7 00:00 -45.75 h2h4 >> 7 00:00 -45.75 h2h4 a1a2 h4h5 a2a1 h5h6 a1a2 h6h7 a2a1 >> 8 00:00 -45.75 h2h4 a1a2 h4h5 a2a1 h5h6 a1a2 h6h7 a2a1 h7h8Q >> 9 00:00 -45.60 h2h4 a1a2 h4h5 a2a1 h5h6 a1a2 h6h7 a2a1 h7h8Q a1a2 >>10 00:00 -45.60 h2h4 a1a2 h4h5 a2a1 h5h6 a1a2 h6h7 a2a1 h7h8Q a1a2 h8h2 >>11 00:00 -43.70 h2h4 >>11 00:00 -43.35 h2h4 >>11 00:00 -43.35 h2h4 a1a2 h4h5 a2a1 h5h6 a1a2 h6h7 a2a1 h7h8Q a1a2 h8h5 a2a1 >>12 00:00 0.00 h2h4 >>12 00:00 0.00 h2h4 a1a2 h4h5 a2a1 h5h6 a1a2 h6h7 a2a1 h7h8N a1a2 h8g6 a2a1 >>g6h8 >>13 00:00 0.00 h2h4 a1a2 h4h5 a2a1 h5h6 a1a2 h6h7 a2a1 h7h8N a1a2 h8g6 a2a1 >>g6h8 >>14 00:00 0.00 h2h4 a1a2 h4h5 a2a1 h5h6 a1a2 h6h7 a2a1 h7h8N a1a2 h8g6 a2a1 >>g6h8 >>15 00:00 0.00 h2h4 a1a2 h4h5 a2a1 h5h6 a1a2 h6h7 a2a1 h7h8N a1a2 h8g6 a2a1 >>g6h8 >>16 00:00 0.00 h2h4 a1a2 h4h5 a2a1 h5h6 a1a2 h6h7 a2a1 h7h8N a1a2 h8g6 a2a1 >>g6h8 >>17 00:00 0.00 h2h4 a1a2 h4h5 a2a1 h5h6 a1a2 h6h7 a2a1 h7h8N a1a2 h8g6 a2a1 >>g6h8 >>18 00:00 0.00 h2h4 a1a2 h4h5 a2a1 h5h6 a1a2 h6h7 a2a1 h7h8N a1a2 h8g6 a2a1 >>g6h8 >>19 00:00 0.00 h2h4 a1a2 h4h5 a2a1 h5h6 a1a2 h6h7 a2a1 h7h8N a1a2 h8g6 a2a1 >>g6h8 >>20 00:01 0.00 h2h4 a1a2 h4h5 a2a1 h5h6 a1a2 h6h7 a2a1 h7h8N a1a2 h8g6 a2a1 >>g6h8 >>21 00:02 0.00 h2h4 a1a2 h4h5 a2a1 h5h6 a1a2 h6h7 a2a1 h7h8N a1a2 h8g6 a2a1 >>g6h8 >>22 00:03 0.00 h2h4 a1a2 h4h5 a2a1 h5h6 a1a2 h6h7 a2a1 h7h8N a1a2 h8g6 a2a1 >>g6h8 >>23 00:07 0.00 h2h4 a1a2 h4h5 a2a1 h5h6 a1a2 h6h7 a2a1 h7h8N a1a2 h8g6 a2a1 >>g6h8 >>23 00:09 M13 h2h3 a1a2 h3h4 a2a1 h4h5 a1a2 h5h6 a2a1 h6h7 a1a2 h7h8N a2a1 >>h8g6 a1a2 g6f4 a2a1 f4e6 a1a2 e6c5 a2a1 c5e4 a1a2 e4d6 a2a1 >>24 00:14 M14 h2h3 a1a2 h3h4 a2a1 h4h5 a1a2 h5h6 a2a1 h6h7 a1a2 h7h8N a2a1 >>h8g6 a1a2 g6f4 a2a1 f4e6 a1a2 e6c5 a2a1 c5e4 a1a2 e4d6 a2a1 d6c4 a1a2 c4a5 a2a1 >>a5b3 >> >> Arena says mate in 14 when Averno is giving 99972, which means mate in 15. The >>strange thing, that I can't check now, is the mate in 14 one iteration before. >> >> José C. > >According to Chest it is a mate in 15: > >PV: h3 Qa2 h4 Qa1 h5 Qa2 h6 Qa1 h7 Qa2 h8=N Qa1 Nf7 Qa2 Nd8 Qa1 Nb7 Qa2 Nxc5 Qa1 >Na4 Qa2 Nb6 Qa1 Nxc4 Qa2 Na5 Qa1 Nxb3# > >Cheers, >Heiner Yes, that's my variation at iteration 24. At 23, there must be something with hashing that I should check. José C.
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