Petard: Minesweeper Classic

Classic minesweeper, with one promise kept on every board: you never have to guess.

The rules are the ones you know. Each number tells you how many mines touch that square. Open every square that is safe, flag every square that is not, and the field is clear. Open a mine and the board is lost.

What is different is how the boards are made. A board does not exist until your first tap. It is drawn around that square, which is always safe and always opens an area, and then a solver clears the whole board from that opening using only deductions a person can make: a number that is already satisfied, a number that can only be satisfied one way, two numbers that share squares, and the mine counter at the end. If the solver ever has to guess, the board is thrown away and another one is drawn. So when a mine goes off, it went off because of a deduction that was there to be made, never because of a coin flip in the last corner.

Tap a square to dig. Hold a square to flag it, or switch the Dig / Flag toggle and tap. Tap a number whose mines are all flagged to open the rest of its neighbours at once.

Boards start at 6 by 6 with four mines and grow, level by level, to 10 by 14 with 28 mines. A level map tracks your stars: three for a board cleared without help. If you are stuck, a hint opens one square you could have proved safe from what is already on the screen. If you hit a mine, you can continue: the mine is defused, stays flagged, and the board carries on.

No timer. Works offline.

Recent changes:
Fixes a bug that could take you out of a level after an ad. Smoother play.