Samurai Su Doku

If you find traditional Su Doku a breeze, then Samurai Su Doku is what you need for a truly demanding mental workout. With its complex, interlinked 5-box grid, Samurai is Su Doku multiplied and intensified. With difficulty levels ranging from Easy to Super Difficult, The Times have come up with another collection of 100 new puzzles to stretch your skills of logic to the utmost.