Visual Sudoku app for iPhone and iPad

Exercise your brain with this addictive and challenging puzzle game, one based on a riddle penned by Albert Einstein as a boy. This brain teaser uses the same high-level thinking as Sudoku, and with trillions of possible solutions, no two games are the same.

Given a number of houses your goal is to determine who lives in what house, drinks what drink, eats what food, has what fish, and keeps what pet. You also have to determine where the house is! Can you do it?

Each puzzle assists you by presenting several logical clues that you use to deduce where (or where not) an item resides. By sequentially removing or promoting an item from the grid, you will solve the problem. Your score depends on how well you use your logical brain to solve he puzzle.

You select the difficulty of solving either a 4 x 4, 5 x 5, or 6 x 6 game. Larger games are more challenging. For even a bigger challenge you can optionally select a "masters" mode where you can only promote an item with no removing items allowed. Finally you can select the "progressive" mode where you solve in sequence one of each of the 4 x 4, 5 x 5, and 6 x 6 games.