In the first case and the second case, you need to take out the colored ball and put it back on the spot. This one upstairs is right. But in the third case, upstairs is wrong. Snooker has special rules. When playing the last black ball, if you score or foul, the game is over (unless the score is the same, you need to fight for the black ball). For example, if you say that you scored 3 points and your opponent scored 4 points, then when you play the last black ball, the white ball and the black ball enter at the same time, and you are fouled. Add 7 points to your opponent. After the game, the black ball was not taken out, and the opponent won by 1 1 3. For another example, if you play 14, your opponent will play 7 points, if you play the last black ball and the white ball drops, you will add 7 points to your opponent. If the game is normal, but now the score is the same, we need to fight for the black ball, that is, put the black ball on the spot and the white ball in the tee area. Both of them flip a coin to decide who will kick off first, and then take turns to play. It's the same at this time, scoring a black ball or fouling. For details, please refer to the snooker rules of Baidu Encyclopedia.