The formula of chess Juexue: Remember the formula of chess: a horse goes to the sun, like a field, a car goes straight, a cannon goes over the mountain, and a veteran never leaves the back garden. The pawn crossed the river and never came back.
Chess Manual: Generals don't leave Jiugong, but scholars only follow officials. The elephant flew to the four corners of the camp, and the horses ran step by step. ?
The cannon must be fired every other child, and the car shop will go straight to the west. ?
A pawn can only take one step, but he can cross the river without leaving a trace.