Minesweeper Drills

Small boards, one deduction each, no timer and no way to lose. Every drill is solvable by pure logic — and tells you which rule solved it.

Counting
A number equal to its covered neighbours means all mines. A satisfied number means all safe.
0 of 3 solved
The 1-1 pattern
Two 1s along a wall, and the cell one of them cannot be counting.
0 of 4 solved
The 1-2 pattern
A 1 beside a 2 along a wall: the far cell past the 2 is always a mine.
0 of 4 solved
The 1-2-1 pattern
Mine, safe, mine — the only arrangement that satisfies all three numbers.
0 of 4 solved
The 1-2-2-1 pattern
Safe, mine, mine, safe. The longer cousin of 1-2-1.
0 of 4 solved
Subset reduction
The general rule every pattern above is a special case of.
0 of 5 solved
In the wild
The same patterns, hidden in a board that looks like a real game.
0 of 5 solved

Counting