The player who first wins six games wins a set.
The service must be strictly underhand and delivered from behind the end of the table.
Scoring
Your opponent scores—If you do not return the ball; if you strike the ball before it touches the table; if the ball bounces twice.
You score—If your opponent strike the ball out of play or bounces the ball his side of the net.
On either player winning his first stroke, the score is called 15 for that player; on either player winning his second stroke, the score is called 30 for that player; on either player winning his third stroke, the score is called 40 for that player, and the fourth stroke won by either player is scored game for that player, except when both players have won three strokes (40 all); the score is then called deuce, and the next stroke won by either player is scored advantage to that player. If the same player wins the next stroke, he wins the game; if he loses the next stroke, the score is again called deuce, and so on, until either player wins the two strokes immediately following the score of deuce, when the game is scored for that player. In naming the score the server is always mentioned first, for convenience, as 30-15, signifying 30 for server and 15 for opponent.
Terms Used in Ping Pong
Let means that the ball, while being served, touches the net in passing over, and the server has the privilege of serving again. If the opponent makes a let stroke it counts, the same as if the ball had cleared the net.
Volleying means striking the ball before it bounces.
Half-volleying means striking the ball just as it bounces.