Will Shortz Presents the Little Black Book of Sudoku: 400 Puzzles (Will Shortz Presents...) |
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 | Long recognized as a great "puzzler," not just for sudoku but for his NYTimes crosswords, Will Shortz provides 400 puzzles of difficulties ranging from "Light and Easy" to "Beware! Very Challenging!" Regardless of the level, these puzzles are scrupulously fair, requiring, in my experience, only two occasions of "trailing" (and those may have been my own fault), when most other such books often require the puzzler to use this "technique" many times during the book.
"Trailing" is the controversial "technique" in which a puzzler, unable to move further in the puzzle, (desperately) chooses a number from a set of pairs and inserts it into the box. The puzzler then trails the results as they suggest other solutions involving other numbers throughout the puzzle to see if they work or if, eventually, you get duplicates in rows, columns or squares. (If you do, you have to backtrack and insert the other number from the pair, which should work.) Many puzzlers feel that this "technique" is not ... read more.
Published 14 November 2006.
Published by St. Martin's Griffin.
rrp £8.85.
464 pages Spiral-bound.
ISBN: 0312368690
ISBN-13: 9780312368692 | |
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