Author: Robert Hyatt
Date: 12:30:56 12/22/00
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On December 22, 2000 at 14:45:03, Ernst A. Heinz wrote: >>Did you look at what happens if you play a4? Your kingside gets totally >>shredded, starting with Qxf7+... > >Yes, true -- but then Black's King is not standing there! > >It rather seems quite safe on d8 while White's King gets >into mighty trouble on d1 after the sequence a4 - Qxf7+ - >Kd8 - Qxg7: > >[d]2rk3r/6Q1/4p3/1pqpP3/p3b1PP/1B6/PPP2R1R/2K5 b - - 0 1 > >"DarkThought" quickly scores this as substantially positive >for Black, locking onto Qe3+ as the best move almost instantly. > >=Ernst= I have no doubt that black might actually be winning here. But that wasn't the point. You said you picked a4 at depth=10. For that to happen, you have to ignore king safety and sit in the middle of the board, with a queen at f7, a rook on the open file, the king rook hanging, the king can't move to connect the rooks, etc. IE at 10 ply it is all judgement, not "truth" as the search probably can't see the final outcome. And to me, a4 looks very dangerous. Crafty would possibly castle if it has a long time to search, otherwise it would not. But at a glance, I wouldn't (as a human) feel particularly comfortable trying to trap the white bishop while letting white's pieces infiltrate on the kingside with my king stranded and the rooks disconnected. Here I would rather avoid that mess unless I am sure I can win, rather than assuming I can win and getting into a bigger mess than I originally thought.
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