U of T Mathematics Network
- Includes interactive games, problems and puzzles including the Monty Hall Problem and the Tower of Hanoi and questions pages with answers and discussion.
- http://www.math.toronto.edu/mathnet/probpuzz.html

The Knight's Tour Links Page
- The goal is to travel with a knight around the chess board, landing on each square only once. Features web links of solutions to the game, including a solution" by Dan Thomasson.
- http://www.velucchi.it/mathchess/knight.htm