How to describe the way of playing chess in words? I know nothing about going in and out.

The first word means moving chess pieces, such as horses and chariots.

The second word indicates the vertical line (the red edge is one two three four five six seven eight nine from right to left, and the black edge is 123456789 from right to left).

The third word indicates that there are only three moving modes: flat, front and back.

The fourth word indicates the number of steps forward or backward, or the horizontal line to which it is translated (for example, if the car is eight into four, it means that the 8-way car is four steps forward, the 6-way gun is leveled with the 3-way gun, and the 3-way horse is retreated with the 2-way gun).

The second word in red and black terms is our 123456789 from right to left (red is represented by uppercase numbers and black is represented by lowercase). Red and black labels are anti-parallel.

Others: There are two cars on the same side of a line, and the first word is changed to front or back. For example, there are two cars with red edges on four lines, and the front one has to be moved to one line, so it is changed to the front one.