English 16
A delightful puzzle created in the 19th century by Sam Loyd, described by Martin Gardner as "America's greatest puzzlist."

Fiver
A simple and surprisingly addictive puzzle. I named it after a character in one of my favorite novels, Watership Down.

Peg Solitaire
When we were kids, my sister and I played this as a board game called Hi-Q. I named this version after her.

Sliders
A couple of famous sliding block puzzles, a not-so-famous one, and an infamous one.

Tower of Hanoi
The classic puzzle, a favorite of programmers and Buddhist monks.

Hare and Hounds
A 19th-century board game invented in France, also called The Military Game. It was popular among French army officers during and after the Franco-Prussian war.

Hex-7
An elegant game of strategy invented in the 1940's, Hex is no longer available commercially but has recently seen an increase in popularity.

TacTix
Created by the brilliant Danish inventor Piet Hein, TacTix is a variation of Nim, one of the oldest of mathematical games.

Triplets
A simple three-in-a-row game first proposed by the Polish-American mathematician Stanislaw Ulam.

MazeGen
A demonstration program, which generates and solves mazes using three different algorithms.