Simple game and big fun!<ul><li>Puzzles with exact one solution<li>Puzzles pre-filled 21 to 24 cells<li>Puzzles that can be solved without guessing<li>A good diversion from your regular work<li>A feeling of challenge to solve the puzzles<li>A feeling of satisfaction or achievement after solving the puzzles<li>Good for beginners and those people who prefer things to be definite