Bowling: 3-6-9 Spare System
Pins Left of the Center
2-pin is the key pin = move 3 boards right
4-pin is the key pin = move 6 boards right
7-pin is the key pin = move 9 boards right
Pins Right of the Center
Converting spares to the right of the head pin requires one extra step BEFORE you start adjusting. You need to find the 10-pin line. This is the line you use to make a 10-pin conversion. You then adjust your position relative to this line. In the 3 6 9 spare system, you move right 3 boards for the 6-pin and move right 6 boards for the 3-pin.
10-pin is the key pin = 3rd arrow, find the board
6-pin is the key pin = move 3 boards right
3-pin is the key pin = move 6 boards right
