2000/08/22 by Cristopher Moore, David Eppstein
Mathematics · Computer Science · #math.CO #cs.GT
published as More Games of No Chance, MSRI Publications 42, 2002, pp. 341-350 · Partlt presented at the 2000 MSRI Workshop on Combinatorial Games
arxiv created 2000/08/22 · arxiv updated 2009/11/30
We solve the problem of one-dimensional Peg Solitaire. In particular, we show that the set of configurations that can be reduced to a single peg forms a regular language, and that a linear-time algorithm exists for reducing any configuration to the minimum number of pegs. We then look at the impartial two-player game, proposed by Ravikumar, where two players take turns making peg moves, and whichever player is left without a move loses. We calculate some simple nim-values and discuss when the game separates into a disjunctive sum of smaller games. In the version where a series of hops can be made in a single move, we show that neither the P-positions nor the N-positions (i.e. wins for the previous or next player) are described by a regular or context-free language.