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Specially compiled to provide the most devilishly difficult challenge, Ultimate killer Su Doku 4 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 Dokus 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 20 Extra Deadly Su Dokus. Are you ready for the challenge?

The Times Ultimate Killer Su Doku 4 is not for the faint-hearted. The puzzles use the same...

Compelling and addictive, Codeword is the cracking alternative to Su Dokus and Crosswords.

The concept is simple. Each number represents a letter, so, starting with the solved letters, use your logic and vocabulary to reveal more letters, form words, and then crack the code

The Codeword series is so popular because you don t need any prior knowledge, unlike a crossword. You can just pick up a pen and get puzzling. It steadily increases your vocabulary, as the difficulty slowly grows as you progress through the book, and even though you ll be working your brain, it s the perfect way to...

For anyone who loves the challenge of su doku but manages to solve them within minutes samurai su doku

With its larger and more complex grid, samurai is su doku multiplied. It is a five grid interlinked version and, as with traditional su doku puzzles, every column, row, and threeby threebox contains the digits1 to 9. Where the puzzles overlap, the rows and columns do not go beyond their usualnine by ninelength but the interlocking boxes provide more clues and more complexity. With 100 samuraisudukoat four levels 30 Mild, 30 Difficult, 30 Super Difficult, and 10 Deadly even the...

This fifth and toughest addition to the successful Times Killer Su Doku series will test your skills to the limit, adding the challenge of arithmetic and taking Su Doku to a new and even deadlier level of difficulty.

The puzzles use the same 9x9 grid as Su Doku but with an added mathematical challenge. The aim is not only to complete every row, column and cube so that it contains the digits 1-9, it is also necessary to ensure that the outlined cubes add up to the same number.

With 150 new Tough and Deadly Killer Su Doku puzzles, there is no chance to ease yourself in with easy...

With its larger and more complex grid, Samurai is Su Doku multiplied. With a five grid interlinked system, 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...