The Times Samurai Su Doku 9: 100 Extreme Puzzles for the Fearless Su Doku Warrio
24,52 €
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 complexity.
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