Author: Dan Homan
Date: 05:14:05 02/22/99
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On February 22, 1999 at 04:09:49, Will Singleton wrote: >New Feature > >I thought I'd post a position each week, taken from member submissions >from the current week's play. Recently on the CCC board we've had a few >positions posted, and these have helped me track down some problems with >my code. Probably just chance, but I think these things are helpful >for programmers in that they can see how their results differ from others, >and figure out why. > >So members, please send me interesting games that your programs play (or >just the positions), and perhaps we can all benefit from the analyses. > >To start the ball rolling, here's a position from the game Amateur-LambChop, >played on ICC yesterday. For some reason, Amateur declined the easy move, >which would have won quickly, and played a tricky move that led to a loss. >On subsequent analysis, it took Amateur 9 ply to see the right move. During >the actual game (blitz), it only searched about 7 ply. I'm thinking this >might be some bug or other weirdness. Does your program have any trouble >finding the right move quickly? > >7k/2pn1Q2/2r4p/p1qpp3/Pp1b3N/1P1P2PP/2P1R2B/7K w - - Nice problem. I'll have to look at it in more detail later, but here are EXchess' results EXchess likes Qxd7 with a score of +3.3 until ply 6 where it switches to Nf5. The score Nf5 climbs to +4.1 in ply 7 and 8. In ply 9, Nf5 fails low with a score of 0.6 and EXchess switches back to Qxd7 with a score of 3.8. Qxd7 fails high at ply 10.... I haven't run it deeper yet. Looks very interesting. - Dan
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