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Minesweeper · Clear every safe cell without hitting a mine
Minesweeper is a logic puzzle where each opened number tells you how many of its 8 neighbors are mines. Most positions can be solved by pure deduction, no guessing required.
If a number's unopened neighbor count matches the number, they're all mines. If it already has that many flags, the rest are all safe. Just these two rules cut most of your guesses.