The Times Samurai Su Doku - 100 Extreme Puzzles for the Fearless Su Doku Warrior

The Times Mind Games

These are the most difficult Su Doku puzzles in The Times range. This is Su Doku multiplied: every column, row and 3x3 box must contain the digits 1 to 9. Where the puzzles overlap, the rows and columns do not go beyond their usual 9x9 length but the interlocking boxes give you more clues - and more co...