When two players have knocked, the play stops, and cards are shown.

It took me around 8 hours to complete on normal settings and experienced players will probably knock an hour or two off that.

Other players knock a ball about six or seven times a week.

Instead of instantly exposing their hand, a player with 31 must knock in turn.

To score, a player again knocks the pin in the air.

A player may either knock or draw in a turn, but not both.

A player who has already lost nine lives may not knock.

Both players knock the ball back and forth until one of them gets the past the flippers.

Since 1962, only four players had knocked in 140 or more.

Once the player has knocked all of the enemies off the screen, he advances to the next level.