On the chessboard, the empty intersection of a chess piece and its straight line is the "Qi" of this chess piece. The number of chess pieces in a single piece is not more than four, but two or more connected pieces can have more than four. If a chess piece loses all its vitality, it becomes a dead chess piece and cannot exist on the chessboard.

2. Purpose

On the chessboard, the blank intersection of the area surrounded by a chess piece is called "eye". An intersection is 1 grid, and the number of objects is called "grid number".

3. Lift the child

Taking the inanimate chess pieces of the other side off the board is called "lifting the child".

Step 4 rob

Both sides can take turns to extract each other's pieces. According to the rules of Weiqi, when grabbing, the extracted party can't bring it back directly, and must find the robbed material elsewhere so that the other party can bring it back first hand.

5, true eyes

One or two empty intersections are surrounded by several connected chess pieces, so this point is called a true eye, or "eye" for short.

6, artificial eye

The shape of the eye is surrounded by several pieces that are not completely connected, which is called "artificial eye". Under certain conditions, the chess pieces that form artificial eyes will be eaten by the other side.