If the music doesn't work try: http://www.youtube.com/watch?v=mWpdp58NOo0&fmt=6

Strimko is a logic puzzle with numbers, just like Suduko. It is based on Latin squares described by Leonhard Euler in the 18th century.

The rules are simple: each row and column of an n x n grid must contain the numbers 1, 2, ..., n exactly once (just like in Sudoku ), and each "stream" (connected path in the grid) must also contain the numbers 1, 2, ..., n exactly once.

Strimko is created and developed by The Grabarchuk Family. It's basically a generalization of Sudoku as Sudoku can be thought of as having 9 streams.

You can play the addicting game at their website: http://www.strimko.com