Try the first ten puzzles for free with no ads, no gimmicks. Three volumes are available for purchase, each with thirty unique puzzles, for hours of puzzling fun! Keep your mind sharp with these stimulating logic problems that will exercise your brain muscles — a great introduction to deductive reasoning! Enjoy a range of problems in every volume. No more erasing! Multi-level undo and Auto-X let you focus on the logic. If you get stuck, you can choose to erase errors or get a hint. Works best on larger screens, but you can zoom the grid to fit your screen - from phone size to the largest tablet. Quality software by Egghead Games. Contact us with questions at: Facebook: https://www.facebook.com/EggheadGames Email: [email protected]. All puzzles Copyright (C) www.sportcerebral.fr