Telegraph Puzzles - Play daily online games including crosswords, sudoku, kakuro, codewords, PlusWord and more
Telegraph Puzzles - Find your favourite puzzles online, from crossword and sudoku to word games, brain teasers and more.
You will find the description of 8 puzzle (a.k.a. 15 Puzzle) and software that finds the solution for every initial state.
Of puzzles, problems, and Powershell.
Logic puzzles and more to entertain the mind at Puzzlers Paradise
Problem Solving and Educational Games - solve problems, brainteasers and puzzles, and play educational games at The Problem Site