Nikolaus Home Registration Participants Program Sudoku Photos

Sudoku for Nikolaus 2005

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

A Nikolaus Sudoku Puzzle

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

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.