A game, also called Tactix, which is played by the following rules. Given one or more piles (Nim-Heaps), players alternate by taking all or some of the counters in a single heap. The player taking the last counter or stack of counters is the winner. Nim-like games are also called Take-Away Games and Disjunctive Games. If optimal strategies are used, the winner can be determined from any intermediate position by its associated Nim-Value.
See also Misère Form, Nim-Value, Wythoff's Game
References
Ball, W. W. R. and Coxeter, H. S. M. Mathematical Recreations and Essays, 13th ed. New York: Dover, pp. 36-38,
1987.
Bogomolny, A. ``The Game of Nim.''
http://www.cut-the-knot.com/bottom_nim.html.
Bouton, C. L. ``Nim, A Game with a Complete Mathematical Theory.'' Ann. Math. Princeton 3, 35-39, 1901-1902.
Gardner, M. ``Nim and Hackenbush.'' Ch. 14 in Wheels, Life, and other Mathematical Amusements.
New York: W. H. Freeman, 1983.
Hardy, G. H. and Wright, E. M. An Introduction to the Theory of Numbers, 5th ed. Oxford, England: Oxford
University Press, pp. 117-120, 1990.
Kraitchik, M. ``Nim.'' §3.12.2 in Mathematical Recreations. New York: W. W. Norton, pp. 86-88, 1942.