Author: Vincent Diepeveen
Date: 12:18:22 01/28/02
Go up one level in this thread
On January 28, 2002 at 14:18:14, Gerd Isenberg wrote: >From CCT4-10 IsiChessX - PostModernist 0-1 > >Does your program avoid Qc8 ? Yes at 40 in 2 level it will for sure, but it takes pretty long with cleaned hashtables to see it for DIEP at my own hardware 6:40 to fail low: 00:01 0 0 81170 (31713) 6 0.482 Qf5-c8 Be7-f8 Qc8-e8 Ng6-e7 Rd3-c3 Ne7-f5 00:01 0 0 137896 (36310) 7 1.251 Qf5-c8 Be7-f8 Qc8-e8 Ng6-e7 Bd4-c3 Qb4-b6 Rd3-d 8 Ne7-g6 Bf3xc6 Qb6xb3 00:03 0 0 234491 (44261) 8 1.013 Qf5-c8 Be7-f8 Qc8-e8 Ra2-c2 Bf3xc6 Rc2xc4 b3xc4 Qb4-b1 Kh1-g2 Qb1xd3 00:09 0 0 832863 (75495) 9 1.127 Qf5-c8 Be7-f8 Qc8-e8 Ra2-c2 Bf3xc6 Rc2xc4 b3xc4 Qb4-b1 Kh1-g2 Qb1-c2 Kg2-h1 Qc2xd3 00:14 0 0 1465330 (137077) 10 1.016 Qf5-c8 Be7-f8 Qc8-e8 Qb4-a5 c4-c5 Qa5-a6 Bf3 -e4 Ra2-c2 Rd3-f3 Rc2-c1 Kh1-g2 01:06 0 0 7461917 (2000655) 11 1.200 Qf5-c8 Ng6-f8 Qc8xc6 Qb4-e1 Bd4-g1 Ra2-a1 Q c6-b6 Be7-f6 Bf3-g2 Nf8-e6 Rd3-d6 Ra1-b1 Rd6-d7 04:01 0 0 28193362 (7122113) 12 1.092 Qf5-c8 Be7-f8 Qc8-e8 Ra2-a5 c4-c5 Ra5-a6 h 2-h3 Qb4-b7 Bd4-g1 f7-f6 Qe8-e6 Qb7-f7 Qe6-c8 Ra6-a3 Bf3xc6 Ra3xb3 06:40 0 0 46793618 (10415537) 13 -0.460 Qf5-c8 Ng6-f8 Rd3-d1 c6-c5 Bd4-g1 Qb4xb3 Qc8-c6 Qb3xc4 Qc6-e8 Qc4-e6 Bf3-d5 Qe6-f6 Bg1-d4 Ra2xh2 Kh1xh2 c5xd4 ++ d4-g1 12:02 0 0 85919547 (13132407) 13 0.359 Bd4-g1 Ra2-a1 Rd3-d1 Ra1xd1 Bf3xd1 Qb4-e1 Bd1-c2 c6-c5 Kh1-g2 Qe1-d2 Bg1-f2 Be7-f6 Qf5-c8 Ng6-f8 25:05 0 0 176785685 (30851038) 13 0.469 Qf5-e4 c6-c5 Bd4-g1 Qb4-b8 Rd3-d7 Qb8-e8 Bf3-g4 h7-h5 Bg4-f5 Ra2-a1 Kh1-g2 Ra1-a2 >[D] 6k1/4bppp/2p3n1/5Q2/1qPB4/1P1R1BP1/r6P/7K w - - am Qc8 > >In this position after 34.Qc8+ Nf8, IsiChess failed even more with 35.Qxc6?? > >[D] 2Q2nk1/4bppp/2p5/8/1qPB4/1P1R1BP1/r6P/7K w - - am Qxc6 > >After 34.Qc8? Nf8 IsiChess got a FailLow with Qxc6 and a very bad search >behaviour. The first one at depth 10 from +130 to +95 after 0:10, a second one >at depth 13 after 1:45 resp. 2:06 from +106 ..via +65-- to -164. Few moments >later, i got an exploding search tree looking for 35.Bc3. > >After 11:10 it came back with a score of -0.88 and after 18:18 it found Rd1 with >-0.83. But unfortunally during the game, my maxTime exceeds (aprox. 3*averadge >time), signaled the Search thread to terminate unconditionally after aprox. 8 >Minutes - and IsiChess played Qxc6?? > >Seems that the FailLow behaviour of my Search needs some work, may be too many >extensions, but the wrong. Also i have to think about interrupting the Search in >these FailLow situations. Most often my branching factor seems OK, but sometimes >these terrible exceptions. > >Very impressed of PostModernist 33...Qb4! > >cheers, Gerd
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.