The Times Samurai Su Doku 6: 100 extreme puzzles for the fearless Su Doku warrior (The Times Su Doku)

by TheTimesMindGames (Author), The Times Mind Games (Author)

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  $12.67

  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 Easy
  40 Mild
  40 Difficult
  10 Super difficult

  Even the speediest of Su Doku solvers will be agonising over these ultra-complex, extended brain-teasers.

  These are the most difficult Su Doku puzzles in The Times range.