Sudoku for Nikolaus 2005

 [Explanation] [New Nikolaus Game] [New Puzzle] [Recall Puzzle]

A Nikolaus Sudoku Puzzle

3 8
6 9
2 1
6
7
5
7
1
4
6
8
8
1
5 1
4
5
9
3
2

How many possibilities are there to add one symbol such that the board becomes a (uniquely solvable) Sudoku puzzle?

Number:

To prove that you have not just guessed the number, also give three of the possibilities (or all possibilities, if there are less than three):
Row: Column: Symbol:
Row: Column: Symbol:
Row: Column: Symbol:


Questions and suggestions to Frank.Luebeck@Math.RWTH-Aachen.De.

Valid XHTML 1.0!    Valid CSS!