Fill a Latin-square grid while satisfying arithmetic cages: add, multiply, subtract and divide to match every target. Fifteen original-engine Keen puzzles across 4×4, 5×5 and 6×6 boards, pencil notes, live conflicts, keyboard and number-pad controls, undo, hints and local saves. Source: https://github.com/chrisboyle/sgtpuzzles/blob/d1e10eb57dd80af4999e698a9ab31f546e9a0b9d/app/src/main/jni/keen.c (MIT).

cage-and-quill-keen.skillsafe.ai

Run app here

PricingCompletely free

Security scanClean — skill and frontend scanned

Source chrisboyle/sgtpuzzles

Created2026-10-26

Updated2026-10-26

Every public app is built from a security-scanned skill and must pass a clean scan — skill and frontend — before it can be listed. Have a skill of your own? Turn it into an app — or read the step-by-step walkthrough.