Portable draughts notation. Currently supported by at least 4 programs. PDN databases A collection of games in PDN format. The draughts problem file format. Ranging from easy to difficult.
Most problems are easy ones.
In 23 tests, dragon is able to proof the game-theoretical value of a position. In the Netherlands. Position count Number of positions in international draughts. This is presented in tribute to the author, Derek Oldbury , probably one of the greatest Checker Players who ever lived. Some notes on techniques for computer program that play games.