Euclid Grid is a clean, brainy number puzzle built around one simple goal: turn every cell into 1.
Pick two adjacent numbers, subtract the smaller from the larger, and plan your way through the grid.
It is a quick brain flex for anyone who likes logic puzzles, math puzzles, number games, and daily challenges.
The rules are easy to learn. Select two different numbers next to each other — up, down, left, or right. The larger number becomes the difference, while the smaller number stays the same. For example, 12 and 7 become 5 and 7. That small rule creates a lot of strategy, because every move changes what is possible next.
The main puzzle uses a 4×4 grid with a move limit, Par target, timer, and remaining-cell count. Clear the board efficiently to earn a better star result. Going for Par makes each puzzle feel sharper, more intentional, and low-key satisfying when the final move lands.
Daily mode lets you play fresh puzzles in Easy, Normal, and Hard. Endless mode keeps new puzzles coming. Marathon mode challenges you to clear 10 stages in a row. Challenge mode lets you generate or enter a challenge code, so the same puzzle setup can be played again or shared. You can also pick puzzles from the Official Pack.
Need a second chance? Use Undo to take back a move, or watch a short ad to use a hint. Want the tougher version? Turn on No Assist to disable hints and Undo, or use Strict Limit to reduce the move limit by 1. Euclid Grid can be chill, focused, or seriously sweaty depending on how you play.
Stats help you track your Daily bests, streak, ★★★ clears, Endless records, and Marathon performance. Make it part of your daily routine and you can keep improving your moves, time, and star results one puzzle at a time. No login is required, and the app works offline.
Download Euclid Grid and start turning every number on the board into 1.