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About PlayMemorize Flag a Mine

PlayMemorize Flag a Mine is a free Minesweeper deduction trainer. Every round shows a partially-revealed board. Exactly one of the unrevealed cells is guaranteed to be a mine by the numbered hints around it · find it and flag it. One wrong flag ends the run.

Cheat-proof validation. A pure verifyGuaranteedMine function enumerates every possible mine placement consistent with the revealed numbers. If the target cell is a mine in every valid placement, the flag is correct. No server, no database · pure constraint satisfaction.

Pure deduction, no luck. Classical Minesweeper sometimes forces a 50/50 guess. Flag a Mine never does · the puzzle generator guarantees a provable answer exists on every round, so each round is a pure reasoning win.

Part of the PlayMemorize family of free brain-training games. Runs entirely in your browser, works offline as a Progressive Web App.

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Q: What is Flag a Mine?

A free Minesweeper deduction trainer. Each round shows a partially-revealed board. Exactly one unrevealed cell is guaranteed to be a mine by the surrounding numbered hints. Flag it to grow your streak; miss once and the run ends.

Q: How is the answer validated?

A pure function called verifyGuaranteedMine enumerates every possible mine placement consistent with the revealed numbers. If the target cell contains a mine in every one of those placements, the answer is correct. The function is the sole oracle · no preset flag to cheat against.

Q: Is there always a provable answer?

Yes · every round is generated so at least one unrevealed cell is a guaranteed mine. Unlike classical Minesweeper, there are no 50/50 guesses. Every round is a pure reasoning win.

Q: Is it free?

Yes, completely free. No account, no ads, no paywalls. Your high streak is stored locally in your browser.