Author: Bob Durrett
Date: 13:06:36 12/20/03
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On December 20, 2003 at 14:54:18, William Penn wrote: >On December 20, 2003 at 14:06:10, Eran Karu wrote: > >>I am looking for any chess engine that gives most accurate long-time analysis. >> >>I wonder which one here: >> >>Fritz 8 >> >>Shredder 7 >> >>Junior 8 >> >>Rebel 12 >> >>Crafty 19.8 >> >>Any other chess engine >> >>Thanks, >>Eran Karu > >Any of them except Shredder 7.04, which gives the worst analysis I've ever >encountered since I started using chess software almost 20 years ago. It is >absurd, and there must be a bug. Only the first move can be trusted, nothing >beyond that. What you say about moves beyond the first move in an engine-generated "analysis line" is consistent with what I have observed. However, if one wishes to do serious analysis, one should not accept moves beyond the first for any chess engine. Each move deserves independent assessment. The fact is that it often happens that the second-best move or even third, fourth, etc., can turn out to be the best move. This is discovered after extensive analysis considering alternate lines. It also happens, all too often, that the best move is not found by the engine at all! This latter case is seen especially in the slow buildup at the front-end of an attack. Another consideration is that computer-generated move sequences generated in automated analysis [I call this "overnight analysis"] of a game are different in that each move gets full analysis. No "line" is offered after the last move. When I thoroughly analyze a game [using chess engines] during post-mortem, I force the engines to examine alternate moves including moves I come up with independently [based on "plans" I come up with independently]. Most of my plan and move ideas prove faulty, but sometimes they turn out to be best. Also, it's easy to work out the best moves in an attack [or defence] when you can do unlimited "takebacks" during post-mortem analysis. Best wishes, Bob D. > >Occasionally, as a rare exception, Shredder 7.04 will give a 100% reasonable >line of analysis. But usually it gives away its queen, overlooks checkmate, etc >in the analysis. But obviously that doesn't hurt its playing strength, which >only requires it to select the best move. >WP
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