02 / 25 / 2012
Great website dedicated to combinatorial puzzles. Each puzzle has a separate page. The number of configurations, solutions, articles about mathematics related to puzzles.
Discussions on the mathematics of the cube.
Herbert Kociemba is a math teacher from Darmstadt. He invented the Two-Phase-Algorithm designed for solving Rubik's cube. This algorithm quickly finds good suboptimal solutions. Cube Explorer is a working implementation of the algorithm.
With about 35 CPU-years of idle computer time donated by Google, a team of researchers has essentially solved every position of the Rubik's Cube™, and shown that no position requires more than twenty moves.
The gallery includes about 1,600 puzzles. The gallery shows very common, but also some rare puzzles. The gallery includes many sliding puzzles, 2D twisty puzzles and trick boxes. The gallery is classified according to the puzzle types.
The recreational mathematics archive site.
All the puzzles on PuzzleBeast are created by computer program. These puzzle-generating programs are written in the Java programming language, and are referred to collectively as "beasts".