Are SadMan Sudoku puzzles minimal, in that deleting any single clue will cause it to have multiple solutions?

A. Not necessarily. Because SadMan Sudoku puzzles are symmetrical, it would be necessary to delete either two or four clues, to maintain the symmetry. Deleting any two or four clues would result in a puzzle with either multiple solutions, or that the in-built solver could not solve.

What People Say

Just downloaded your program today - Very comprehensive and impressive. I've seen a number of Sudoku applications, for both PC and PDA. but never one as feature-rich and comprehensive as this one. This is a must for true Sudoku fans.
Houle Bækdal, Denmark
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