Author: Dieter Buerssner
Date: 17:24:33 05/21/01
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On May 21, 2001 at 14:06:37, John Merlino wrote: >On May 21, 2001 at 12:06:51, Carlos Pesce wrote: > >>Hi, John! >>In the new patch, CM Gui will send "hard" and "easy" to the winboard engines? >>I think that its much important..maybe you can implement it. >The current state of the patch does not do this, as Chessmaster assumes that the >engine's default operation is what the user wants. If another version of the >patch is required (in other words, if any bugs are found in the current >version), then this might be added. > >However, you can send any command that you want to any imported engine via the >Engine Monitor windows. First, I want to say that I do not own CM 8000. However I have seen quite a few log files of my engine running under thi GUI as a WB engine. Also, from quite a few messages, I get the feeling, that CM 8000 is very popular for running tournaments for WB-engines. But, I guess now there is a problem. Some WB engines will default to ponder on, and others will default to ponder off. Now many problems can arise. I think, it will be not too obvious to all users, which engines default to what. The tournament results can be very tilted, because one engine can get 75% of the CPU on single CPU systems, while the opponent gets only 25%. For Yace, I decided to make ponder off the default. Perhaps this was the wrong decision, but I have some reasons to do this - it is less than one minute work for me, to default for ponder on. I think, the Xboard protocoll described by Tim Mann is not very clear about this issue. However, all the logs I have seen under different GUIs show all the same behaviour. They either send hard or hard and easy. The only exception is CM, and I think this is very unfortunate. Please also note, that your suggestion, to just send easy to turn ponder off is not sufficient. In the WB protocol, easy is a toggle, while hard is a switch. So, to turn ponder off, you have to send hard followed by easy. To me it seems difficult, to explain all this to the "normal" user. A seleciton for permanent brain on or off in the GUI looks much easier, when the GUI will send the right commands to the engine afterwords. I cannot see, why you want to prefer to the engine default. Regards, Dieter
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