Minesweeper Expert: 30x16, 99 Mines and What Makes It Hard

2026-11-06

On the standard Minesweeper expert level the grid is 30 by 16, which is 480 cells, and it hides 99 mines, a density of 20.6%. Beginner is 9 by 9 with 10 mines and Intermediate is 16 by 16 with 40. Our own game does not have these three presets: it has five fixed fields, and it is a 2-player race on one shared field, not a solo time attack. Below are the numbers for all of it, measured on simulated boards (a model, never real players).

Beginner, intermediate and expert sizes

The three levels differ in size and in density. The last two columns come from simulated boards played by a program that guesses only when nothing is proven: they show how many boards finish with logic alone, and how many forced guesses a board needs on average. The start is a first click that is guaranteed to open an area.

So on a model of expert boards, only 14.1% can be cleared without a forced guess, against 89.9% on beginner. The average expert board needs 3.67 forced guesses. If the first click is only protected from a mine and is not guaranteed to open an area, the model gives 2.5% of boards with no forced guess and 6.34 guesses per board. If you want to know how much of this is luck, read luck, logic and forced guesses.

Why expert is harder than its numbers look

Going from 12.3% to 20.6% density sounds small. The effect is large because of the cells that show no number. A zero opens its whole neighbourhood, and zeros are what give you room to work. In the model, the share of clear cells that show a zero is:

• Beginner: 40.4%
• Intermediate: 29.3%
• Expert: 18.5%

Fewer zeros means fewer openings, so you start with less information and every area is smaller. High numbers also become normal: in the model, 95.0% of expert boards contain at least one 5, against 2.05% of beginner boards. See Minesweeper number colours for what each number looks like.

Where to click first on expert

In the standard games, the first click is the one choice that matters before any logic. This table assumes the first click is never a mine. It shows how often the click lands on a zero, and how many cells open when it does.

The corner is the best bet for getting any opening at all, but the opening is small. The centre opens the most, 40.7 cells, but it works only 15.4% of the time. On beginner the same centre click lands on a zero 32.6% of the time, so the expert odds are less than half. The edge is the middle choice. These numbers are for the standard levels only. In our game the first tap is not protected, and a mine you hit scores a point for you, so there is no first-click ritual.

Our five fields are not beginner, intermediate and expert

Our game has no difficulty presets. A room picks one of five fixed fields, all taller than they are wide. Only Classic is open to everyone. The other four need a one-match board ticket paid with in-game coins, and anyone can sit at such a table if the room host has the ticket. The simulated start here is a random clear cell, which differs from the standard rows above, so compare the two tables only loosely.

Some fields have rock cells: Canyon has 22, Quarry 20 and Crossroads 20. Rock cannot hold a mine, cannot be tapped, stops an opening, and does not count as a neighbour. The open cells above are the cells that are not rock.

Which field is the hardest?

It depends on what you measure.

• Highest density and fewest openings: Quarry. It has 19.4% mines and only 9.73% of its clear cells show a zero, so there is little open ground. In return, no two mines ever touch, which makes its numbers easier to read.
• Most forced guesses: Canyon. The model gives 11.01 forced guesses per board, and none of its simulated boards could be finished without one. Mines are three times as likely on cells that touch rock, so they pile up along the walls.
• Easiest to open: Hot Zone. Almost half of its clear cells are zeros, but its mines sit in clusters, so the numbers inside a cluster get high.

Classic is the gentlest for logic: 12.9% of its boards need no forced guess. Remember that in this game a guess is cheap. Tapping a mine scores a flag and keeps your turn, and only tapping clear ground passes the turn.

How to practise

Start on Classic and learn the patterns that give certain mines: 1-1, 1-2 and 1-2-1. The patterns guide has a printable sheet, and the tips guide covers the order of play. A finished match takes about 3 minutes. Play against a bot on Easy, Medium or Hard; bots do not see the mines. Then move to a field that matches the weakness you found: openings on Quarry, forced guesses on Canyon.

Open Minesweeper, tap Play Now, and you are seated against a bot on Classic with no download and no sign-up.

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