Killer draughts: classical 10x10 positions

Killer draughts is a slight variation to international draughts that is intended to decrease the drawing rate. But it is difficult to estimate how big the effect will be. So I did an experiment to make things a bit more clear. I have selected 119 classical positions that have occurred in practice. The white position is always the same, while the black position varies slightly. Using a adapted version of the strong draughts program Scan 2.0 made by Fabien Letouzey that can play killer draughts, I analyzed these positions and compared the results. In all cases the principal variation is given, so that they can be compared.

In normal draughts only 6% of these positions end in a win or loss, although in a few cases the draw is very narrow. With the killer rules this percentage increases to 48%. So with the killer rules the number of draws in this game type is still significant. But it is definitely a large improvement. In practice this would mean that the usually very safe classical game type is no longer that safe anymore.

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© Wieger Wesselink http://10x10.org