Paper Corners: Shakashaka

Paper Corners is a calm logic puzzle of black triangles and white space. It is a Shakashaka puzzle: put triangles in the corners of squares until every white area is a perfect rectangle. HOW IT PLAYS • Tap near a corner of a square to place a black triangle there. Tap again to turn it or to remove it. • A number on a black square tells how many triangles touch it. • At the end, every white area is a rectangle. Some are straight, and some turn 45 degrees. FIFTY ORIGINAL PAGES Five chapters grow from small warm-ups to 7 × 7 pages. Every page has exactly one solution, and you can reach it by reasoning alone. A NEW PAGE EVERY DAY The daily page comes from its own set of pages. An unfinished daily page waits for you after midnight. HINTS THAT EXPLAIN Ask for a hint, and Paper Corners marks one cell that must be true and tells you why. Undo and redo keep every move. There is no timer, no lives, and no score. A QUIET DESIGN Paper, ink, and one vermilion fold, in light and dark appearance. Dynamic Type, VoiceOver labels and actions for every cell, Reduce Motion, and Increase Contrast are all supported. KEEP WHAT YOU FINISH Each finished page goes to your compositions, with its white rectangles traced in indigo. Share any page as an image. PRIVATE AND OFFLINE No ads, no accounts, no in-app purchases, and no data collection. Everything works offline, and your progress stays on your device. Shakashaka is a puzzle type from Nikoli. Paper Corners is an independent app and is not affiliated with Nikoli.