Minesweeper

Minesweeper is a deduction grid: uncover every safe square without detonating a mine. This board is fixed at 10 rows by 10 columns with 15 mines, so 100 squares hide 15 hazards and your target is to reveal all 85 safe ones. That is a 15% mine density — dense enough that early guesses matter, sparse enough that a good opening cascade usually clears a large region.

Left-click reveals a square. If it is a mine the game ends immediately. If it is safe, it shows a digit from 1 to 8 counting the mines among its eight neighbours. A square with no neighbouring mines is blank, and revealing it automatically floods outward to every connected blank and the numbered border around them — that cascade is where most of the board gets cleared.

Right-click toggles a flag on a covered square. Flags are bookkeeping only: they do not disarm anything and the game never checks them for victory. They do protect you, because a flagged square refuses to reveal. You win purely by revealing all 85 non-mine squares.

Note that the grid is generated when the board loads, not after your first click, so opening moves carry real risk.