Samurai is for anyone who wants to enjoy extra-challenging extended-length Su Dokus. If you regularly relish number puzzles but they are solved within minutes,

This popular, even more challenging variant of sudoku is for true puzzle warriors! Each one consists of FIVE sudoku grids arranged in an X-shaped array, with ov

A sumo-sized challenge & lt;br/ & gt;Sodoku is the number-placing game that has taken the world by storm. The premise is simple - fill each row, column and 3x3

The "New York Times" crossword editor and puzzlemaster takes Sudoku to a whole new level with this collection featuring 100 brand-new (and just as addictive) pu

The puzzles in this collection of treacherously difficult puzzles will stretch even the most advanced Su Doku enthusiast. You will need to use all of your best