Minesweeper Oni20×30, 130 mines

Oni, the level beyond Hard: 20×30 with 130 mines. It's the same size as the hardest level on the big sites, and every board needs a hard read. No sign-up, and the first 100 stages are free.

Good forPlayers who solve Hard with ease and want the deepest reasoning Minesweeper has to offer.

  • Board20×30
  • Mines130 (22%)
  • Rough timeAbout 30 minutes to 1 hour
  • Name in the gameOni

Play Oni now (first 100 stages free)

The key to Oni: reading the overlap in a 1-2

What you need on Oni

The mines are packed tight, and every board has spots that only settle when you read several numbers together. There is still never a 50/50, so reasoning alone will solve it.

The rules and patterns (such as 1-2-1) are explained with pictures in How to play Minesweeper, with tips.

How Easy, Medium, Hard, Oni and Extreme differ

Easy, Medium and Hard are the classic Beginner, Intermediate and Expert, with the same sizes and numbers of mines. Above them come Oni and Extreme. The higher the share of mines, the more often you have to read several numbers together.

DifficultyBoardMinesDensity
EasyClassic: Beginner9×91012%
MediumClassic: Intermediate16×164016%
HardClassic: Expert16×309921%
OniBeyond the classic sizes20×3013022%
Extreme (hardest)Beyond the classic sizes24×3017024%

Puzzle Lounge's Minesweeper

  • No luckEvery board can be solved to the end by reasoning alone. You never get a 50/50.
  • Free, no appIt plays right in your browser on a phone, iPad or PC.
  • 1000 stagesEach difficulty has stages that get harder little by little. The first 100 are free. From stage 101 on, you play with the Lounge Pass or tickets.
  • Daily board and This week's boardEveryone races the same board, with rankings and replays to watch.
  • Online co-op and racesSolve the same board with friends, or race them.

Questions about Oni

How big is Oni, and how many mines does it have?

20×30: 600 cells with 130 mines. That's the same size and density as the hardest level on the big Minesweeper sites.

How is it different from Hard?

The mines are denser, and every board is made so that at least once you have to read 3 or more numbers together.

Doesn't it come down to luck?

No. However hard a board is, we only use ones confirmed to be solvable to the end by reasoning alone.

Play Oni

Other difficulties

Minesweeper EasyFirst-timers, players who want a refresher on the rules, and anyone who wants just one board in a spare moment.9×9, 10 mines → Minesweeper MediumPlayers who can solve Easy and want a bit more to think about, or want to learn and use patterns like 1-2-1.16×16, 40 mines → Minesweeper HardPlayers who find Medium too easy, want to cut their times, or want a Hard they can't lose to luck.16×30, 99 mines → Minesweeper Extreme (hardest)Players who have conquered Oni and want boards few can read through.24×30, 170 mines →