About The 1-2-2-1 Pattern
If you came looking for the 1-2-2-1 pattern, this is the full game: a 256-square board, 40 buried mines and a timer that starts the moment you dig.
In a 1-2-2-1 run the mines sit under the twos, which clears both ends instantly. Each number on the board is a promise. It tells you precisely how many of the eight squares around it hide a mine, and from that single fact whole regions can be solved without any luck at all.
Use the left mouse button to open squares and the right button to mark suspected mines. Touch users get a dedicated mode button instead of an awkward long press, which keeps flagging fast under time pressure.
Your very first click is always safe. The mine layout is generated after you dig, and the algorithm keeps your opening square and its immediate neighbours clear, so no session ever ends before it has properly begun. Under the hood it is plain modern web technology: React for state, Tailwind for the neon styling, and oscillator-based Web Audio for the ticks, flag clicks, win chime and explosion. There is no plugin, no installer and no account.
Reset as often as you like — every restart randomises a completely new layout, so no two boards are ever quite the same. Whether you are here for a quick distraction or a serious attempt at a personal best, the board is ready the moment the page finishes loading, and it costs nothing to try again.
Highlights
- Solve 1-2-2-1 runs at a glance
- Live timer and remaining-mine counter in the dashboard
- Free to play with no download, login or install