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 a line to say thank you for your SadMan Sudoku program. It is by far the best sudoku program for learning how to solve fiendish and diabolical games that I have so far come across.
Peter Martin, UK
More …

No malware No spam
McAfee Site Report
Web of Trust