Author: Gian-Carlo Pascutto
Date: 08:55:17 08/29/05
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On August 29, 2005 at 10:05:41, Robert Hyatt wrote: >The problem is that you then introduce errors. I only probe (on the quad 875) >when a capture takes the board to 5 or less pieces, and I have all 5-piece >tables on that box. I don't probe in the q-search at all, although some do and >I used to. I can't see how you could reduce that without introducing >significant errors. > >Years ago I used to limit the depth at which I probed, to keep the NPS from >dropping too far. And saw too many mistakes where it would push the critical >capture beyond the probe horizon, so that it could still think it was winning or >whatever. And it would enter a forced line because of that, thinking it was >winning, when it was forcing a draw... 1) I haven't seen this effect. 2) Should it work as you describe, it would still happen. I looked at Crafty and you limit probing to <= iteration depth, you can search a lot deeper, especially with some spite checks or pawn pushes. 3) What about 6 men? -- GCP
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