Author: Uri Blass
Date: 04:50:23 04/04/03
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On April 04, 2003 at 07:38:36, S. Loinjak wrote: >A typical null move trap. > >F7 with selectivity 0(!), 128 MB hash and 500 MHz announces after Bc7 that black >will be mated in 11 moves. As it needs roughly 3 min for this insight I'd expect >it to solve the original problem in under 30 minutes. > >I assume F7 doesn't switch off null move in endgames with queens as it expects >the queen to have enough moves to avoid zugzwang (obligation to move). This is >seemingly an optimistic heuristic. Another heuristic is worse from practical point of view. I also switch null move on in cases like this. null move can be off with queens on the board but only if the side to move has less than 10 legal moves. Uri
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