Author: Peter Kappler
Date: 17:29:28 04/27/99
Go up one level in this thread
On April 27, 1999 at 19:58:50, James Robertson wrote: >On April 27, 1999 at 18:30:16, Peter Kappler wrote: > >>On April 27, 1999 at 17:35:15, KarinsDad wrote: >> >>>On April 27, 1999 at 15:35:06, Will Singleton wrote: >>> >>>[snip] >>>> >>>>Amateur doesn't find the move after 2 minutes and 9 ply, liking Be7 with +3. I >>>>better get busy and try out the single-reply extension. Problem is, I use >>>>psuedo-legal moves, so I'm not sure how to tell when I only have one reply! >>>> >>>>Will >>> >>>The subject says it all. >>> >>>KarinsDad :) >> >> >>Most simple move generators ignore the status of the king (i.e. is it in check, >>does this move place it in check?) and just generate every possible move in the >>position. The test for legality is resolved by the search. >> >>--Peter > >Also, it is much faster (I think). But, you do have the one reply to check >problems. Crafty generates pseudo-legal moves and has one-reply to check >extensions, I think. How does it handle this? > >James Here's how I think Crafty does it: In general, Crafty just generates pseudo-legal moves, *unless* it already knows it is in-check, in which case it uses a special "check-evasion" move-generator that will generate only legal replies to check. Again, this is just my recollection. Wish Bob were here. :-( --Peter
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