NAND vs Paper Corners

NAND is a simple puzzle game with six levels and no timer. Using bitwise operators and arrow keys, try to reach the goal at the top in the fewest moves! It will be difficult for beginners and people unfamiliar with bitwise operators, but you can improve with practice and understanding!

Paper Corners is a Shakashaka logic puzzle: place black triangles in a grid until every white region forms a rectangle. Some rectangles sit straight; others tilt at 45 degrees. The numbered squares tell you how many neighboring squares need triangles. Solve 222 pages in twenty-two chapters. Start with small boards, then work through larger pages up to 10 × 10. Choose a page by difficulty or follow the chapters in order. A short introduction teaches the rules. Four optional technique lessons let you practice triangle clues, white squares, and rectangle edges. If you get stuck, a hint marks a cell and explains the deduction. Undo and redo let you revisit any move. Play a free daily page every day, or choose an earlier date from the daily archive. An unfinished daily page stays available after midnight. Keep your finished pages in a composition library, with the white rectangles traced in indigo. Mark favorites, share an image, export printable sheets, or send a playable page link to a friend. Play offline on iPhone, iPhone Duo, and iPad, without timers, lives, scores, or ads. The paper-and-ink design supports light and dark appearance, larger text, VoiceOver, Reduce Motion, and Increase Contrast. The original 102 pages, today's daily page, and your personal notebook stay free. Paper Corners Pro is a one-time purchase that unlocks the daily archive, chapters 11 to 22, and future additions. Purchases can be restored.