Author: Heiner Marxen
Date: 10:20:10 04/20/04
Go up one level in this thread
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
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