Question 1

What is Flag a Mine?

Accepted Answer

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.

Question 2

How is the answer validated?

Accepted Answer

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.

Question 3

Is there always a provable answer?

Accepted 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 when you solve it · if you can't find the answer, the answer is still there waiting to be deduced.

Question 4

Will this make me better at full Minesweeper?

Accepted Answer

Yes · the deduction half is what actually translates between the two games. Once you can scan a partially-revealed board and immediately spot a forced mine, the same skill makes you faster and more accurate in full Minesweeper rounds. The remaining 50/50 guesses in full Minesweeper are luck either way, but the deduction skill is trainable.

Question 5

How does my progress save?

Accepted Answer

Your high streak is stored locally in your browser.