Author: James Swafford
Date: 09:06:18 09/13/02
Go up one level in this thread
[D] r1bq2rk/pp3pbp/2p1p1pQ/7P/3P4/2PB1N2/PP3PPR/2KR4 w - - You can see from the position above and the search output that this is a simple mate. Somehow the program must see the mate during iteration 2, hence the fail high at the root (it was searching with a window of +/- 1 pawn of the previous score of 15). After the fail high, the search is restarted with a window of 15,+infinity, but Qxh7 doesn't do so well on the research (it gets a -675), so it doesn't get backed to the pv, the rest of the moves fail low, and I have to start a search in iteration three. I find it odd that the program could see Qxh7 was good enough to fail high, but on the research failed low. How frustrating. :) Is this common, or do I have a bug? -- James Problem 1: r1bq2rk/pp3pbp/2p1p1pQ/7P/3P4/2PB1N2/PP3PPR/2KR4 w - - h6h7; parsing: h6h7...done. correct move(s): h6h7 FW Dpth Nd Cnt CSecs Score PV Line 1& -> 15 0 -570 h6g7 g8g7 1& -> 216 0 10 h6g5 g6h5 1& -> 589 0 15 h6f4 d8e8 1 -> 2299 6 15 h6f4 d8e8 2& -> 3373 6 15 h6f4 d8f6 f4f6 2& -> 6558 11 +++ h6h7 2& -> 7149 11 --- 2& -> 7150 11 15 h6f4 d8f6 2 -> 27746 39 15 h6f4 d8f6 3& -> 32509 44 20 h6f4 g6h5 f4f7 g7h6 3& -> 74189 94 +++ h6h7 3& -> 75366 99 59997 h6h7 h8h7 h5g6 3 -> 77892 99 59997 h6h7 h8h7 h5g6
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.