Create or randomly generate celtic knots.
Solve some classic logic puzzles, inspired by those found in the work of Raymond M.Smullyan.
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A page to attempt solutions to classic chess problems like the 8 queens puzzle.
A self-paced online course for high school math teachers.
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Polynomial grid division calculator and example generator.
A page for playing around with chladni-esque figures.
Explore patterns and puzzles using Truchet tiles.
Generated chessboard path puzzles, including Kixote, Hidato, and Numbrix. The Tourist page provides you with some clues while you find your own knight, king, rook, or queen's tour.
Some simple examples of solving problems using R.
Interactive and downloadable Sudoku puzzles.