Author: Andrew Williams
Date: 02:34:41 12/14/98
Hello all, I'm trying to work out how to implement capture/recapture extensions in my program. I have had a look at crafty and gnuchess and I've tried several approaches, viz: 1 Extend when a capture followed by recapture restores the material balance we had at the root. 2 Extend when the capture/recapture restores the material balance from before the sequence. 3 Extend when the capture and recapture are on the same square (and same material value). In all these cases, I seem to get a much larger tree and often lose a ply of search because of this. So, three questions: (a) Am I on the right lines with 1, 2 and 3 above? (b) Is it normal to lose depth when doing this? (c) Generally speaking, it better to complete d7 with this extension than d8 without it? I realize that these questions probably aren't yes/no style questions, so thanks to anyone who takes the trouble to reply. Regards Andrew Williams (Author of PostModernist on ICC)
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