Author: Dieter Buerssner
Date: 10:16:32 07/15/01
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On July 14, 2001 at 21:49:35, Mike S. wrote: >But Yace 0.99.50 doesn't ponder in the ChessBase GUI. The latest WB adapter available at the www.chessbase.com was from Nov. 2000 when Yace 0.99.50 was made available. Pondering seemed to work as well as possible, when I tested this. I rechecked today, and no newer adapter was available. I have downloaded the newest version from Frank's site, and indeed pondering is not working anymore with this. All the earlier versions of the WB-Adapter sent "hard" (=WB-protocol way of saying permanent brain on), before the sent the ChessBase extension ponder move (which Yace supports). The newest version of the WB adapter sends "easy" (=permanent brain off) instead ... Sorry, the technical documentation of the CB-specific extensions to the Xboard protocol is totally inadequate. From private communication with the Gandalf programmer, it seems, that I am not the only one, having problems with this. If they had interest, they would fix at least this. There is no mention of the before mentioned change at all. I have guessed all their implementation details from studying log-files. My implementation was dependent on the hard be sent first. There are other problems with their implementation of ponder mode. A chessengine cannot really know allways, if it runs with permanent brain on or off, and so cannot adjust its time management for this. I think, customers of CB software, that are interested in well functioning WB-engines, should write to them. I did not have much success with my questions there ... For users of Yace, I suggest to use the WB-adapter of Nov. 2000. Regards, Dieter
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