Author: Drexel,Michael
Date: 07:42:33 08/18/05
Go up one level in this thread
On August 18, 2005 at 09:48:19, Peter Berger wrote: >On August 18, 2005 at 09:01:51, Majd Al-Ansari wrote: > >>I was watching the game on playchess and looks like Fruit won the game. Very >>impressive game considering Crafty was using 8 processors and Fruit only 1 >>processor. But I have to admit I think that Crafty was caught by poor book >>opening. > >I am not sure I completely agree with this assessment, at least not when put >this way. > >The potentially controversial move is 11. ... g5 I suppose. I don't think this >move is that bad at all, objectively. I hope you know that objectivity doesn´t count in computer chess at all. Crafty 19.19 thinks the position is about +1.2 for White after this move and Fruit 2.1 thinks it is +1. Before that move both think it was equal. So the game was practically decided after this move. Let's move a little further: 12. Qd2 h6 >13. Qc3 Qf6 14. Kh1 . Here Crafty played 14. ...Bb7?, that is clearly a bad >idea. The king has to stay in the centre or castle queenside if necessary, the >bishop belongs to d7 or e6 and then the rooks both belong to the kingside to >attack white's king. > >After 14. ...Bb7 white has an edge, but black is not lost. After 15. f4 gxf4 16. >Bxf4 the next critical point is reached. Here a possible move is 16...Rg8 e.g. - >nothing to brag about, but black is still well alive. Instead 16. ..O-O ?? is >just suicide. > >So yes - this line should never have been in Crafty's book, because it could not >deal with it. I am to blame for that, so maybe 0.6 points were lost because of >that - bad enough !! The rest is Crafty's fault, that just castled into it. > >Congrats to Fruit - nice game! > >Peter Your book did a good job so far. Nobody is able to prevent such things completely. Bob should develop some tool which analyses all the relevant final positions of a Crafty book automatically and in case Crafty does evaluate this positions worse than -0.7 (for example) writes the associated line and score into a textfile. That should make life much easier for his book cooker :) Michael
This page took 0.01 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.