Sudoku

[patdunham]

Does anyone have the definitive answer to what is the minimum number of starter digits for a Sudoku to be soluble to a unique solution?

[JerryB]

An article about Sudoku in New Scientist last December suggested a research project had found that they could not construct uniquely solvable puzzles with less than 17 givens. This had not been proven, though.

You need to be a NS subscriber to read the article online, but Wikipedia is currently saying the same thing

http://en.wikipedia.org/wiki/Sudoku

- check the Mathematics of Sudoku section of the article.

[patdunham]

Thanks very much JerryB