Sudoku designers the world over will weep and gnash their teeth at
the revelations in this comprehensive guide to cracking the
addictive puzzles, but solvers will find it absolutely invaluable
as they seek to improve their skills. Even experts don't know all
these tricks; hidden pairs, naked pairs, X-wings, jellyfish,
squirmbag, bivalue and bilocation graphs and chains, plus the
exclusive Gordonian logic methods that turn the toughest puzzles
into a breeze. There are hundreds of Sudoku to practice on. A
special addition is a reprint of the very first Sudoku puzzle ever
published!
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