Kayles (Rip van Winkle's Game)

Martin J. Chlond


This game was proposed by H E Dudeney in 'The Canterbury Puzzles' where he also presents the winning strategy for a particular starting configuration. More complete treatments using Sprague-Grundy analysis are given by Beasley and Berlekamp et al.

A number of coins are set out as above with at least one gap. Players take turns removing coins. At each turn a player may remove either a single coin or two coins that are touching each other.

Click on the coin(s) to be removed and then click on 'Remove Marked Coins'. The computer will then mark the coin(s) that it intends to remove. Once again click on 'Remove Marked Coins'.

The player who removes the last coin(s) wins.

References

Dudeney, H.E., (1919), The Canterbury Puzzles, Thomas Nelson and Sons.
Beasley, J.D., (1990), The Mathematics of Games, Oxford University Press.
Berlekamp, R.B., Conway, J.H., Guy, K.G., (1982), Winning Ways for your Mathematical Plays, Academic Press.

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