Author: David Rasmussen
Date: 08:28:35 05/24/02
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On May 24, 2002 at 11:19:15, Daniel Clausen wrote: >On May 24, 2002 at 11:08:12, David Rasmussen wrote: > >>The subject says it all... Chezzz is getting impatient... >> >>/David > >Sorry to distract from the original question: > >I don't want to rub it in, but if I remember right, Chezzz was the one who lost >a game from a won endgame. (with that queen move) Did you ever find out what the >reason was? > Maybe you're thinking of the game Sjeng - Chezzz in the 5th round? Chezzz only got a draw from a won endgame. I never found the bug, if any. The most important reason was that Chezzz didn't have EGTB's and Sjeng did. The key move was very hard for Chezzz to find, without EGTB's. Other engines found the move without EGTB's but didn't necesarily see why it was good. A week later, for the next weekend of CCT4, Chezzz had EGTB's. I didn't want it to happen again... :) There was also some hashing artifacts involved. Chezzz wouldn't make the same (wrong) move from a clear hash table.Instead it made another (wrong) move. I posted the key position some days after, and the main response seemed to be that it would be very difficult to solve it without EGTB's, special knowledge or luck. It was an exciting game. But really, Chezzz should have lost. It played a rotten opening. Which was why I rewrote major parts of my book code in that week too :) /David
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