Pearl rule
1, the black side spreads the seeds first, and the white side spreads them later, starting from Tianyuan.
2. The winner is to form five pieces of the same color in succession in the horizontal, vertical and diagonal directions of the chessboard.
3. Black forbidden hands, white forbidden hands. The forbidden hands of black chess include "San San" (including "Si San San"), "Si Si" (including "Si Si San") and "Long Lian". That is, black can only win by "four or three". Please refer to the illustration for the explanation of terms.
If there is no winner, it is a draw. It is negative to pull the ball in the game and leave midway.
5. Five companies and forbidden hands are formed at the same time, and victory is judged.
Rules and exceptions of the game
1, before the game starts, both sides guess, large number MINUS, odd number for, even number for.
2. The first hand of white chess (that is, the second move on the board) should be in Puckilo, with Tianyuan as the boundary, mainly to show respect for each other, and then both sides can play at will.
In the game, both sides should abide by the "professional gobang rules". In case of dispute, it shall be decided by the referee.
4. Give the player who dropped the chess piece a negative sentence (the chess piece fell on the chessboard). In case of fader or eraser, the first landing point on the disk surface shall prevail. It is not illegal to straighten chess pieces by hand.
5. Play chess politely in the game to prevent abnormal sounds and movements from affecting each other's thinking.
6. After the game, both sides should put the pieces back.
7. In the game, if the black side is banned, the white side should immediately point out the forbidden point, and the black side is negative. For example, after the white side banned the black hand, then the next step was Bai Zi, and the black hand was also banned.
8. Competition time: Both sides have four grades: 15 minutes, 1 hour, 2 hours and 5 hours respectively, and overtime will be judged as negative.
Special provisions
Although professional gobang has adopted various restrictions on black chess, the advantage of sunspot first is still great. Therefore, there are three special rules in high-level professional competitions.
1, designated play: refers to the chess played by both sides at the agreed start, with white chess played first.
2. Three hands can be exchanged: it means that after the third hand of black chess is played and before the fourth hand, if the white side thinks that the shape of black chess is unfavorable to its own side, it can be exchanged, that is, the party holding white chess becomes the party holding black chess, but the black side cannot but exchange.
3. Playing with five hands and two hands: It means that when Black plays the key fifth hand in the next game, it must play two games, so that White can remove a piece from these two games and then continue to play. Generally speaking, white chess must remove the points that are unfavorable to white chess and reserve the points that are unfavorable to black chess for black chess to play.