Mathematical Foundations
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The Times Fiendish Su Doku Book 19: 200 challenging Su Doku puzzles (The Times Su Doku)
Challenge your brain with these enjoyable puzzles.
The latest book in The Times Fiendish Su Doku series – previously unpublished quality Su Doku puzzles. Includes 180 Fiendish and 20 Super Fiendish puzzles.
You don’t need to be a mathematical genius to solve the treacherous puzzles in this collection of Fiendishly difficult puzzles – it’s simply a question of logic.
Perfect for the advanced solver in need of a constant supply of ultra-difficult puzzles, and guaranteed to provide hours of mind-stretching entertainment.
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From £6.91£7.99 -
The Times Ultimate Killer Su Doku Book 18: 200 of the deadliest Su Doku puzzles (The Times Su Doku)
Challenge your brain with these enjoyable puzzles.
Specially compiled to provide the most deadly Su Doku challenge, this is the only volume for Su Doku enthusiasts who need a puzzle that really tests their mettle.
Prepare yourself for the toughest Su Doku challenge there is. These diabolically difficult Ultimate Killer Su Doku puzzles will really put your brainpower to the test as you ‘warm up’ with the 100 Deadly Killer puzzles before steeling yourself to take on the 100 Extra Deadly Su Dokus. Are you ready for the challenge?
Not for the faint-hearted. The puzzles use the same 9×9 grid as a regular Su Doku, but have an extra mathematical element that multiplies the challenge. The aim is not only to complete every row, column and cube so that it contains the digits 1 to 9, but also to make sure that the outlined sections, called cages, add up to the number given in each cage.
Warning: Not suitable for amateur puzzlers!
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From £7.06£7.99
