Hitori

Shade cells so no number repeats among the unshaded cells of any row or column — but shaded cells may never touch, and the unshaded cells must all stay connected. A puzzle of elimination. Fewer seconds is better.

Trains: Deductive logic · Category: Logic & Puzzles

How to play: Hitori is a free, browser-based brain-training game in the Brain Gym suite. Play it instantly — no sign-up, works offline, and your best scores are saved on your device.

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