What are the two basic Minesweeper deductions?

If a number's unopened neighbors exactly equal its remaining mine count, all of them are mines. If a number's flagged neighbors already equal its count, all its other unopened neighbors are safe. Nearly every board opens up by alternating these two.

What is the 1-2 pattern in Minesweeper?

On a straight edge, a 1 beside a 2 means the cell beyond the 2's other neighbor is a mine: the 2 needs two mines, the 1 accounts for one of the shared cells, so the extra mine sits in the cell only the 2 touches.

Do I ever have to guess in DailyGrid Minesweeper?

Almost never until the very end: play the forced deductions first, use the total mine count (20 on DailyGrid's 10x10) for endgame arithmetic, and only guess when two cells are truly symmetric — then guess away from edges, where a flood helps most.

Minesweeper Strategy: Read the Board Like a Logic Puzzle

Beyond the rules — the two deductions, the patterns, and a worked example from a real DailyGrid board. New to the game? Start with how to play, then come back.

🧮The only two deductions you really need

Every number on the board is a small equation: mines among my unopened neighbors = my value minus flags already placed. Two cases solve most of Minesweeper:

All-mines: if a number's remaining count equals its count of unopened neighbors, every one of those neighbors is a mine. Flag them all.
All-safe: if a number's flags already equal its value, every other unopened neighbor is safe. Open them all.

Alternate the two along the frontier — the line between opened and unopened cells. Each flag creates an all-safe somewhere; each opened cell creates new numbers. Solvers who stall are usually staring at the middle of the frontier instead of walking its whole length.

🧪Worked example — a real DailyGrid board

From the Wednesday, October 14, 2026 board (10×10, 20 mines). The first click lands on a 0 in the top-left corner and the flood opens 14 cells. Two forced moves follow immediately:

Step 1 — the forced mine. The opened cell at row 2, column 2 shows 1. After the flood, it has exactly one unopened neighbor left: row 3, column 3. A 1 with one candidate means that cell is a mine — flag it. No probability involved; it cannot be anything else.

Step 2 — the satisfied number. Now look at row 3, column 2, which also shows 1. The flag you just placed is its only mine, so its equation is complete: its remaining unopened neighbor, row 4, column 3, is safe. (It opens as a 2.) One flag, one free cell — and the frontier has moved. That alternation, repeated, is the entire engine of a solve.

🔷Patterns worth memorizing

The 1-2 (edge). Along a straight wall of unopened cells, a 1 next to a 2: the cell at the far end of the 2 is a mine. The 2 needs two mines; one of them is shared with the 1, so the second hides in the cell only the 2 can see.
The 1-2-1 (edge). Three numbers against a wall — 1, 2, 1 — means mines under the two outer cells of the 2's span and safety in the middle beyond them. It is the 1-2 applied from both sides.
Corners are generous. A corner cell has only 3 neighbors, so a 1, 2, or 3 there constrains hard. Work corners early.
Count the whole board. DailyGrid boards hide exactly 20 mines. Late in the game, subtract your flags from 20: if the remainder equals the unopened cells in a sealed region, they're all mines (or all safe) without any local logic at all.

🎲When a guess is real — and how to guess well

Sometimes two cells are genuinely symmetric and no deduction separates them. Before guessing, exhaust the board: an unexamined frontier cell elsewhere often breaks the tie for free. If you must guess:

Guess a cell whose opening helps most if safe — away from the frontier, a lucky 0 floods; next to it, you only win one cell.
Prefer guesses that keep both outcomes playable; avoid creating a second 50/50 downstream.
On DailyGrid, your first click is always safe, and boards are generated to reward the logic above — most "guesses" players make are actually missed deductions one frontier-walk away.

⚠️Common mistakes

Flagging hunches. A wrong flag makes two numbers lie at once and the error surfaces far from its cause. Flag only certainties.
Opening around a number before counting its flags. The all-safe deduction is free progress — take it before probing new territory.
Ignoring the mine counter. 20 is a small number; endgame arithmetic with it is often the whole solve.

❓FAQ

What are the two basic deductions?: Unopened neighbors equal to the remaining count → all mines. Flags equal to the number → all other neighbors safe.
What is the 1-2 pattern?: On an edge, the mine sits in the cell only the 2 touches. See Patterns above.
Do I ever have to guess?: Rarely, and only at the end — count flags against the 20-mine total first, and guess where a flood helps most.
Where are the basic rules?: In the companion guide: How to Play Minesweeper.

▶ Play today's Minesweeper — free

More Minesweeper: daily Minesweeper · rules & basics · puzzle archive · More daily logic puzzles