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 1-2-1 pattern
Mine, safe, mine — the only arrangement that satisfies all three numbers.
0 of 4 solved