Behind the courageous backs of trustworthy warriors, the prince can feel more or less at ease. However, by making moves and passing forward other pieces, the defenders move out of place, and sooner or later the ruler remains in the center of the gray one-on-one. It feels very uncertain: guns are loaded in the rival army, horsemen spur horses, and at every next moment the prince can catch the shah.
There is only one way to hide quickly - by getting behind the walls of the tower. First, the prince approaches one of them, jumping over two or three cells. After that, the figures change places, and the prince finds a temporary but fairly reliable solution: it closes inside the dungeon.
The combination is considered one move and corresponds to the classic chess castling. In this case, the castling is the same in all directions and can be long by 3 cells and short - by two. Each party can implement it only once per party. There are a few limitations: this move must be the first for the prince and for the tower; there should be no other figures and broken fields between the prince and the tower. In addition, you can not hide in the tower, if the prince has already announced the Shah.