Author: Tom Kerrigan
Date: 02:20:25 12/31/99
Let's say your program is thinking on the opponent's time, and the opponent makes a move. You obviously can't just call the makemove() function in your engine to enter the move, because the engine is in the middle of a search and it's not on the right position. How do you solve this problem? Personally, my program maintains two chess positions: the search engine position and the user interface position. I have two move generators, one for each position. I also have two makemove() functions, etc. This approach strikes me as bad design, because so much functionality is being duplicated. My idea is to put my search engine in a class. Then I can just make two instances of that class--one for searching, and the other for the user interface. Then the problem is that the UI doesn't need a lot of the search engine stuff. It sure doesn't need a PV array, for example. So my latest idea is to make a "board" class and a derivative "engine" class. The engine class will contain everything that the UI doesn't need. I think this solves the problem neatly, but it's evidently not what most people do. Is there an easier solution staring me in the face? Thanks, Tom
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