What are the rules of billiards? Snooker.

The rules are as follows:

The inner edge of the snooker billiard table is 350 centimeters long, 175 centimeters wide, and 85 centimeters high. Snooker*** 22 balls are used, including 15 red balls, 6 colored balls and 1 white ball (main ball). The rows are shown on the right, with the numbers representing the colored balls and their scores. The red ball is worth 1 point and is arranged in a triangle, placed between 6 and 7 points. The colors and scores of the colored balls are as follows: 2-point ball: yellow 3-point ball: green 4-point ball: coffee 5-point ball: blue 6-point ball: pink 7-point ball: black ball.

The process from the time of teeing off to the time when all the balls have been hit into the pocket is called an inning. During the course of play, if a player fails to collect all the balls in one shot or hits an illegal ball, the right to hit the ball is ceded to the other player. A match can be decided in one, three, five or seven innings. In the case of the World Professional Championship final, thirty-five innings are played. If at the end of the game the teams are tied, the traditional method of deciding the winner is to place the black ball in the black position and the white ball in the teeing area, and both teams decide who will bat first by tossing a coin, with the winner being the one who scores the black ball first. The winner of each game is determined by the number of points scored by both sides, and the winner is the one with the highest score. Points are scored in two ways: either by scoring a goal or by penalizing the opponent for a mistake. One point is awarded for each red ball scored, two points for a yellow ball scored, three points for a green ball, four points for a brown ball, five points for a blue ball, six points for a pink ball, and seven points for a black ball. Therefore, both sides will do their best to hit the black ball into the pocket more often.

The semicircular area on the table is the teeing off area, with the diameter of the colored balls 2-4-3. Prior to teeing off, both sides can decide who will tee off first by flipping a coin. The teeing side, may place the white ball anywhere in the teeing area, and must then play from whatever position the white ball stops at after each stroke. The playing team must score a red ball before they can score a favorable colored ball. After the ball has been scored, it must be removed and reset to its position. Then, the red ball is played, the red ball is played in and then the colored ball is played in, and so on. After all the red balls are in the bag, the colored balls must be played in order from the low-scoring balls to the high-scoring balls, which are yellow, green, brown, blue, pink and black balls in that order. At this point, the colored balls that have been played in, do not have to be taken out again, until all the colored balls are in the bag and the white balls are left on the table, the game is declared over.

The rules of snooker state that failure to comply with the following rules is a foul and should be penalized with a point.

When playing the red ball, if the white ball fails to hit any red ball-empty, a penalty of four points is imposed; if a colored ball is hit by mistake, the penalty is according to the score of that colored ball, but with a minimum penalty of four points. I.e., if a black ball is hit there is a 7-point penalty, and if a yellow ball is hit there is a 4-point penalty; when playing a colored ball, if it fails to hit the colored ball it is intended to hit, the penalty is according to the score of this colored ball. If a higher scoring colored ball is hit by mistake, the penalty is 4 points according to the higher score, with a minimum penalty of 4 points. Therefore, after scoring a red ball and before hitting a colored ball, if the colored ball to be hit is not clearly visible, a statement must be made as to which ball is to be hit, otherwise an automatic penalty of 7 points is imposed; if the white ball is mistakenly hit into the pocket, a minimum penalty of 4 points is imposed, or a penalty is imposed in accordance with the highest-scoring ball that was first touched by the white ball prior to it going into the pocket. After the white ball has been pocketed, the team playing next may hit the white ball anywhere in the teeing area; the penalty points are not deducted from the penalized team's points, but are added to the opponent's score.

It is also a violation to (1) knock the ball off the table; (2) hit the ball with both feet off the ground at the same time; (3) hit the target ball with the white ball jumping over the center ball; (4) have the ball touched on the table by anything other than the hitting end of the cue stick or by any part of the body; (5) hit the white ball with the cue stick more than two times in succession on the way out; and (6) have contact between the cue stick, the white ball, and the target ball at the same time. When the distance between the white ball and the target ball is less than 2.5 centimeters, it is very difficult to make a shot without committing a foul, so when the white ball is in close proximity to the target ball, the hitting team is only allowed to hit the white ball away from the target ball, but not to drive the target ball. In this particular case, as long as the white ball is hit away from the target ball, it is treated as hitting the target ball. A good golfer will often take advantage of this opportunity to make a safety or snooker.

The following rules are also included:

Free Balls: After a player hits a missed ball and snooker appears on the table, the other player cannot see the entire red ball, so he can choose a colored ball to play as a red ball, which is called a "free ball". If the ball is in the pocket, it will be treated as a red ball in the pocket and scored one point, and then the ball will be played as usual. However, if the red ball has been played and the other player cannot see the whole ball, the other player can play any color ball, which is called a free ball. The score of the free ball will be calculated according to the lowest score ball on the table, and the other balls will be played in the usual order after the ball is scored.

Replay: If a player makes a mistake and puts his opponent at a disadvantage, the opponent has the right to ask the player who made the mistake to play the ball again. This rule, like the free throw rule, is to prevent either side from intentionally playing an error ball to benefit from it. However, before making a decision to have the fumbled ball replayed, it is important to make sure that there is no chance for every ball on the table, and that the level of play of the fumbled ball is properly taken into account.

Unconscious Saving: An unconscious saving penalty may be awarded after a player has played a missed ball, if the referee believes that the ball should have been playable. In this case, the other team has several options:

(1) restore the ball to its original state before the missed shot and ask the missing team to replay it;

(2) ask the missing team to follow up the shot in position;

(3) play the shot itself in position;

(4) play a free shot itself if there is a snooker on the table.

Color ball placement: when the color ball falls out of the bag and is re-set back on the table, if the original spot of this color ball is occupied by another ball, then this color ball is set to the empty spot of the color ball with the highest score at that time. If all the spots are occupied, then the ball should be placed in a line perpendicular to the bottom edge of its own spot - closest to its own spot and not touching any other ball.

Stalemate: When the referee decides that there is a stalemate, the referee declares to both players that if after a few rounds there is no significant change in the situation, the game is null and void and has to be restarted.