The New Sudoku Players' Forum

[Chessmaster]

wow that is more soultions than i have seen on a puzzle

[ravel]

If so many would need to be changed, I guess just adding two would be the simplest fix:

Code: Select all

 5 . 6 | . 2 . | 9 . 3 
 . . 8 | . . . | 5 . . 
[1]. . | . . . | . . . 
-------+-------+-------
 6 . . | 2 8 5 | . . 9 
 . . . | 9 . 3 | . . . 
 8 . . | 7 6 1 | . . 4 
-------+-------+-------
 . . . | . . . | . .[5]
 . . 4 | . . . | 3 . . 
 2 . 1 | . 5 . | 6 . 7 

Nice (and nice to solve too), but has the disadvantage to destroy the full symmetry. See here for a hard 4-digits-changed puzzle.