Author: Martin Giepmans
Date: 07:17:57 09/21/04
My engine SpiderChess has been a private engine till now, but I plan to release it in the near future as a WinBoard engine. The implementation of the WinBoard protocol is still incomplete (just enough to play games on ICS) so it will take some time. Please be patient .. This week I connected the engine to the Arena gui and everything works fine, as expected, except for one thing: take back moves. Under Winboard there is a command "retract move" that sends "remove" to the engine. This command takes back two moves, the last move of the engine and the last move of the opponent. I seems that this command is missing in Arena. Or did I overlook it? Apparently one can use the left arrow key to take back moves in the Arena gui. The gui will then eventually - after it is told that it should start to calculate - put the engine in force mode and send one or more "undo" 's. In contrast to "remove", "undo" only takes back one move. This doesn't work in WinBoard. You will get the message "position is not current" if you try. Nothing is send to the engine. Unless it is first put in analyze mode, perhaps. Haven't tried that yet, as analyze mode is still on the to do list. So, I wonder, is Arena doing something here that is not part of the WinBoard protocol? Martin
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