The game is played with one small chip. The chip is placed in Zenning position between the Zenn blocks. This side of the board we will call the shooter’s side. The other side we will call the pin side. Each frame for a Zenn “bowler” consists of one (if he strikes) or two shots (three if he is in the 10th frame and strikes on the first shot). The first shot is an attempt at a Zenn. If successful a strike is recorded. Spares are made by Zenning the second shot from where the chip lies. If a player sinks the chip on the second shot, but does not Zenn it, only 9 pins are considered down for that frame. If a player does not score a basket on his second shot his score for that frame is the number of pins down on his first shot. The following tells the number of pins down depending upon where the chip stops after the first shot: 9 pins – the 3 pt. section by the cup on the pin side; 8 pins – the two 2 pt. sections on the pin side; 7 pins – the two 3 pt. sections that contain the “Z” or “N” on the pin side; 6 pins – the two 2 pt. sections on the shooter’s side; 5 pins – the 4 pt. section on the pin side; l! pins – the 3 pt. “Z” section on the shooter’s side; 3 pins – the 3 pt. “N” section on the shooter’s side; 2 pins – the 3 pt. section by shooter’s cup; 1 pin – the 4 pt. section on shooter’s side; 0 pins (gutter ball) – the chip stops entirely in the center circle or falls into the shooter’s cup or is shot off the board. Ten frames are bowled, and conventional bowling scoring rules are used.
Notes:
1. A chip which stops between the opposite Zenn blocks (pin side) may be shot into the cup from there and still be considered a spare (9 pins would have been considered down on the first shot).
2. A Zenn “bowler” .always receives credit for the higher amount of pins down if the chip overlaps more than one section.
3. A “split” occurs when a player must ricochet the chip off a side or a block to obtain a Zenn (a spare).
4. A 300 game is obtained when a player shoots 12 consecutive Zenns (12 consecutive strikes).