Author: blass uri
Date: 06:22:23 11/27/99
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On November 27, 1999 at 08:51:43, Heiner Marxen wrote: >>How many nodes(legal moves) does your program search per second? > >Not even 20K NPS on a P/166, so CHEST is not a fast searcher. >But at the same time it can do 1500 "mate in 2" per second. Simple calculation shows that it needs only 20000/1500=13.333 nodes to find if there is a mate in 2. I do not understand it. only generating all the legal moves in the first ply is more than it and I do not understand how can you avoid it in cases when there is no mate in 2. Even if there is a mate in 2 and you are lucky to guess the right move by first try if you check all the legal moves of the opponent you usually have more than 13.333 legal moves. I can understand saving nodes in the last ply when you need only to generate moves that threat the king but how do you do it before the last ply? Uri
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