For anyone who loves the challenge of Su Doku but manages to solve them within minutes,you can now enjoy the extended mental workout and ultimate endurance test of a five grid interlinked system.
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.
With another 100 new Samurai puzzles to vex you for hours,lose yourself in the four levels of this book:
10 Easy40 Mild40 Difficult10 Super difficult
Even the speediest of Su Doku solvers will be agonising over these ultra-complex,extended brainteasers.
These are the most difficult Su Doku puzzles in The Times range.
Publisher: HarperCollins PublishersISBN: 9780008535841Number of pages: 176Weight: 360 gDimensions: 246 x 189 x 15 mm
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