Author: Gerd Isenberg
Date: 11:18:14 01/28/02
From CCT4-10 IsiChessX - PostModernist 0-1 Does your program avoid Qc8 ? [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
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