The authors show that there are underlying mathematical reasons for why
games and puzzles are challenging (and perhaps why they are so much
fun). They also show that games and puzzles can serve as powerful models
of computation-quite different from the usual models of automata and
circuits-offering a new way of thinking about computation. The
appendices provide a substantial survey of all known results in the
field of game complexity, serving as a reference guide for readers
interested in the computational complexity of particular games, or
interested in open problems about such complexities.