Portugues
Jirai Mine Field
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About the game
Jirai is Japanese for a land mine, and the game is a patient logic puzzle: a field of hidden cells, some of them mines. Open a cell and it shows how many of its neighbours are mines; empty ground opens up on its own. Use the numbers to work out where the mines are, mark them, and open every cell that is safe. You win when every safe cell is open.
The board does not have to be a square grid. You can play the eight-neighbour square field, a four-neighbour version where diagonals do not count, a hexagonal field with six directions to read, or a field that wraps around so that a corner has eight neighbours. By default every field is checked before you play so that it can be solved without guessing, and the first cell you open is always safe. You choose the size and the number of mines, seed a field to repeat it, or take the field of the day.
Playing it here
Click Play. The panel on the left sets the board type, the shape, the level (Easy 9 x 9 with 10 mines and up), the size and the number of mines, whether the field must be solvable by deduction, how the first opening works, the board material and the markers; "Lay a new field" builds one. On the board, tap a cell to open it, or switch the Open button to Mark to flag. "Hint" points at a cell you can deduce, "Start over" replays the same field, "Just the board" hides the panels, and "Today's field" or a seed give a field you can repeat. The counters show the mines left, the time and your moves. Everything stays on your device.
Controls
| Input | Action |
|---|---|
| click / tap | open a cell |
| right-click / hold | mark a mine |
| arrow keys | move the cursor |
| Enter | open |
| F or Space | mark |
A few things worth knowing
Start with the corners of numbers. A 1 with one closed neighbour tells you exactly where a mine is.
Use the flags as notes. They do not change the board, so mark what you are sure of and open what the marks prove safe.
Try the hexagon field. With six neighbours the numbers read differently, and it is a good way to break a habit.
Questions
Will I ever have to guess? Not with the default setting: every field is checked beforehand so that it can be solved by deduction.
Can I change the size? Yes: width, height and mines can all be set, besides the preset levels.
Credits and licence
The code, the drawings and the puzzle levels are by John Morris, under the MIT licence; nothing else is bundled with the game. The README says there are no third-party boards or artwork.