Minesweeper Strategy: Make Safer Moves

Count before you flag

Start with one number and count only confirmed mines beside it. If the number is already satisfied, every other covered neighbor is safe. If all remaining covered neighbors must be mines, flag them together. A flag is a note to yourself, so remove it if later clues contradict it.

Let a clue’s value be N, confirmed flags around it be F, and covered neighbors be C. If N minus F is zero, the remaining covered neighbors are safe. If N minus F equals C, every one of those covered neighbors is a mine.

Compare clues that share squares

Two nearby numbers often point to the same covered cells. Subtract the known mines and compare the squares still in question: if one clue needs one mine among two cells and its neighbor needs one among those same two, you have not learned which cell is dangerous yet. Wait for another clue instead of guessing.

When two clues overlap, compare their sets of covered neighbors rather than looking at the numbers alone. Remove known mines from both clues first; the difference between what remains can identify a safe square or a forced mine.

Use a consistent scan

After every reveal, scan the new numbers, mark deductions you trust, then return to clues touched by those flags. On large boards, work a small region at a time and use the board edges to reduce possible neighbors. Speed comes from fewer repeated checks, not from rushing.

Separate deductions from guesses

Sometimes two or more mine layouts still fit the clues. Keep confirmed mines separate from possibilities, compare how many mines remain in the connected area, and avoid treating a flag as proof. If no square is certain, choose a move that may uncover several new clues and give you more information.