What the numbers actually tell you
A revealed number counts mines in the eight surrounding squares, including diagonals. A 1 is not a direction: it means exactly one neighbouring square contains a mine. If that square is already flagged with certainty, the other neighbours can be opened. Use overlapping numbers to reason about the same hidden squares.
Reveal a square, then place flags
Left-click or tap to reveal. Right-click on a computer or long-press on touch to place a flag. A flag marks your deduction; it does not prove a mine is there. Remove a doubtful flag before using it as evidence. This edition places mines after your first reveal so that the opening square is safe.
Beginner, intermediate and expert boards
Start with the 9×9 board and ten mines. The 16×16 board has forty mines, while the wide 30×16 expert board has ninety-nine. The difficulty buttons start a new board. On a narrow phone the expert grid can require horizontal scrolling; use landscape or fullscreen when you want more room instead of shrinking every square until it is hard to tap.
Winning is about safe squares
Clear every non-mine square to finish. The timer begins with play, and the remaining-mine display reflects your flags rather than a hidden scan of the solution. Work slowly through corners and edges before chasing a faster time. A safe first click does not make later guesses safe or guarantee a no-guess board.
This browser edition and your next puzzle
The player hosts mashukui’s MIT-licensed Web Games implementation. It works without a game-file import or a separate account. Best results use this browser’s storage; a saved catalogue link is a different record. Sudoku is a natural next choice for number-based deduction, while 2048 changes the pace to tile merging.
