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Lulu Sales Rank: 164544
2 People Reviewed This Product
  • By Philip Khew
    Feb 9, 2011
    Agreed with Paul's comment. A standard sudoku puzzle has only 1 solution. You may not like to guess your way through to get an answer...
  • By Paul Stygar
    Jan 9, 2011
    Gad, these puzzles are way beyond "extremely tough", but the real problem is the puzzles have insufficient clues to reach a unique solution. Most of the puzzles I checked had over 500 solutions. These puzzles were kinda fun in a strange way. One can arbitrarily pick any of the possible candidates in a cell, work through all the implications, pick another arbitrary candidate, etc, and almost always reach a solution. Each guess reduces the possible solutions by 50-80%, it takes lots of guesses to get 500 solutions down to one. Puzzle #43 was the only puzzle that solved after one guess (r4c8=2), but did not match author's solution. Puzzle #50 has only 13 clues, when no one has published a valid puzzle with fewer than 17 clues. There were lots of typos, where the given numbers in puzzle did not match the solution. Puzzles #19, #20, #22, #24, #33, #34 had conflicting numbers in a row, column or box. The typo in #41 makes it impossible to solve, since r9c5 cannot contain 1-9. The... More > marvelous thing about electronic publishing is it's so easy to correct typos and re-publish, but what would be the point of correcting the typos? This book does not deserve the minimum rating (one star). I did not find any valid puzzles, though many were quite cute.< Less
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Product Details

January 4, 2008
Perfect-bound Paperback
Interior Ink
Black & white
0.32 lbs.
Dimensions (inches)
7.5 wide x 7.5 tall
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