Logic Masters Deutschland e.V.

This is the first game of its kind that I created: Dekadoku. I designed it based on a 10x10 Greco-Latin square, an object so peculiar that Euler himself considered them impossible. The rules are simple: 1. Place all two-digit combinations (from 00 to 99). 2. In each row or column, no number can have the same tens digit. 3. In each row or column, no number can have the same units digit.