Shikaku: Rectangle Logic

Find the rectangle hidden in every number. Shikaku is a clean logic puzzle about dividing a grid into rectangles. Each rectangle contains exactly one number and covers that many cells. Fit them together without gaps or overlaps to solve the board. HOW TO PLAY • Use each number exactly once • Make every rectangle's area match its number • Cover the whole grid KEEP SOLVING • Explore 900 puzzles across Easy, Medium, and Hard • Come back for a fresh daily challenge and track your streak • Learn with guided practice; use hints and undo when you need them • Play offline in light or dark appearance • Start free; one optional Premium purchase unlocks the full collection One rectangle often reveals the next. Download Shikaku and find your first one.

Meet Shikaku: a calm collection of rectangle puzzles, daily challenges and guided practice.