Gnu Backgammon is a very strong computer program for playing and analyzing backgammon matches. It is available free for anyone to download and use. Albert Silver's guide takes you through all the features of the program and shows you how to use them. This is the best documentation available ...
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The image above shows the Human vs. Computer options screen in the 247 Backgammon online game. The options screen for Pass & Play (Two-Player) mode looks the same. Except there's no Difficulty section, of course. Main Screen Backgammon Options ...