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Old 08-03-2014, 08:05 AM
johncw82 johncw82 is offline
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Join Date: May 2014
Location: Hong Kong
Posts: 4

Originally Posted by zenobia43 View Post
Does the book state somewhere that each solution is unique and each step in the solution only requires logic (no guess-and-check)?

If the puzzles in the book are like the ones in the online library, there should be a way to deduce the next step without guessing.
According to the Introduction, it says:

Every puzzle in this book is solvable through logical deduction alone; trial and error and "forward guessing" are never required for a successful solve, though you are welcome to use these methods if you like!

It seems that some of the problems may have more than one solution or cannot be solved. I don't know if it happens or I miss something during solving the problems.
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