詰め将棋LV20（七手詰め）〜どんどん強くなる将棋ゲーム!!
This is a Japanese chess game.
Not a competitive game, the game is to choose the choice of the correct answer.
The game is over when you make a mistake the selection.
If the selection of the correct answer, clear the stage.
Stage is also 20 in total.
The more advances, the stage, the problem is more difficult.