Author: Mike Byrne
Date: 21:33:36 02/20/06
Go up one level in this thread
On February 21, 2006 at 00:14:53, Will Singleton wrote: >On February 20, 2006 at 21:39:05, Mike Byrne wrote: > >>On February 20, 2006 at 20:57:29, Will Singleton wrote: >> >>>On February 20, 2006 at 19:49:06, Mike Byrne wrote: >>> >>>>http://chessprogramming.org/cccsearch/ccc.php?find_thread=271717 >>>> >>>>Prevously, someone had speculated tha Fischer played Bxf5 due to the strength of >>>>Black's position, i.e., Bxf5 may be the best hope for white to score a half >>>>point. >>>> >>>>Crafty 20.3 agrees with that assessment. >>> >>>Yes, but so do a lot of other engines, and much faster (Rybka, Shredder, even >>>Amateur). You'll have to come up with something more on-point if you're trying >>>to show crafty's strength. >>> >>>Will >> >>Really ? If Shredder 9.1 finds it faster - please demostrate. On my machine >>Shredder switches off after 15 ply and it does' back (alowwed 10 minutes). You >>should try to stay more on-point with your replies ;>) >> > >I don't want to put too much effort into this, since my goal isn't to criticize >crafty. I certainly hope Bob is making good progress. > >Shredder finds the alternative solution, Nd2, which both Shredder and Rybka show >is drawn. Rybka finds Bxf5 in about 11 sec. Amateur takes 2:30 to find Bxf5. >Other progs perform similarly. Your test position is therefore flawed in two >respects: it has an alternate solution, and other progs find your solution much >faster. You missed several points. 1. A few years back - even good chessplayers were saying they don't understand Bxf5 and doubted that programs would find that move. 2. Crafty is making progess - the fact that perhaps other programs find it faster does not flaw the test position . 3. Given the position and the context of whenteh game was played, Bxf5 is better than Nd2 - although they both may lead to draw - with all things being equal , a move played that is more difficult for the opponent to findthe correct move is a more desireable move. >
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