Puzzle Hashiwokakero translated from Japanese means: to build bridges. And you will actually build them, although they will look very primitive, representing lines connecting circles with digital values. The numbers represent the number of bridges to be connected to the given circle. If there are enough of them, it turns green. Lines can be drawn only horizontal or vertical; it is forbidden to connect elements diagonally. The game will be over. If all the circles on the playing field turn green in Hashiwokakero.