Do you know minesweeper?
It is a puzzle game the all mankind are hooked on once upon a time.

In modern time, it is still widely used.
However, I have a bone to pick with it.
In the minesweeper, there is a situation which the only luck resolve the puzzle.
I made "Unopenable Minesweeper" for this reason, and I'm satisfied with that game,
but it is different game from the minesweeper.

Genuine minesweeper looks traditional minesweeper.
The difference is the only one.
In this minesweeper, there is no situation which the only luck resolve the puzzle.
The puzzle is made so that it is resolvable.

I believe that there are many people which has the same feeling.