Author: Daniel Clausen
Date: 08:43:42 05/24/02
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On May 24, 2002 at 11:28:35, David Rasmussen wrote: >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 Hm.. maybe it was not you then. The bad queen move (which gave check) allowed to exchange the queens and the other side had a passed pawn which would queen in 2 move moves. Anyway, good luck in the next CCT for Chezzz! =) Sargon
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