Posted on March 9, 2015
Tridoku puzzles are logic puzzles that are an ideal brain training.
How to play Tridoku: Tridoku consists of nine large triangles. The numbers 1-9 must be placed into the triangular cells of each large triangle. The numbers 1-9 must also be placed in the three legs of the inner shaded triangle and in the three legs of the outer shaded triangle. No two neighboring cells may contain the same number.