# Sudoku for Nikolaus 2005

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

## A Nikolaus Sudoku Puzzle

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

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