When You are Ready to Challenge Your Brain Medium to Hard Sudoku - Comet Puzzle

So you've been doing medium Sudoku puzzles for quite some time? Then increase the challenge with difficult Sudoku puzzles. Playing helps you to increase your sense of time and you can apply this to your regular job. The game will train you to make a decision and to act on that decision with less hesitation. Grab a copy now!

EAN: 9781683218982