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The vast majority of sudoku puzzles that are labeled hard, expert,challenger, and the like, in newspapers, magazines, and books, arenot really all that difficult. And in a surprising number of cases,they are downright easy. They usually require only intermediatesolving techniques. In the Mensa Absolutely Nasty Sudoku books, youwill find puzzles truly worthy of the label hard. The puzzlesincrease in difficulty throughout the four books in the series. InLevel 1, only basic and intermediate techniques are required, butthey are not beginner puzzles. In Level 2 and Level 3, moreadvanced techniques are added to the mix, and by Level 4 you canexpect not only the most advanced techniques, but puzzles thatrequire multiple advanced techniques in each puzzle: X-Wing;Swordfish; XY-Wing; XYZ-Wing; and the Gordonian Rectangle.
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Mensa Absolutely Nasty Sudoku Level 315250£3.09 Save 38%Unavailable to buy online
Mensa Absolutely Nasty Sudoku Level 3