2-4-6 Spare System
The 2-4-6 spare system is a highly accurate method for picking up spares. It’s not as easy or popular as the 3-6-9 spare system, so it is used most often by more skilled bowlers. The 2-4-6 system involves more than adjusting your foot position, so it is more complex than the 3-6-9 system.
With the 2-4-6 spare system, your starting position does not change. Instead, you adjust that target arrow used for aiming. The adjustment to the target arrow depends on what pins are left standing.
The approach for the 2-4-6 system has 2 starting positions: the strike position and the 10-pin position. There are also 2 target arrows for aiming: the strike aim and the 10-pin aim. This spare system covers every different spare combination by moving the target over either 2, 4 or 6 boards.
Since it deals with aim and not foot position, the 2-4-6 spare system can be more exact than the 3-6-9 position. The 2-4-6 system is also handy when you cannot change your foot position because the ball return is in the way. Sometimes the bowling lane will dry out quicker when a number of bowlers are playing because they all aim at the same target and throw the ball down the same path.
When the remaining pins are left of center:
If the 2-pin in the key pin, shift your aim 2 boards to the left.
If the 7-pin is the key pin, shift your aim 6 boards to the left.
Remember that your board adjustment is always relative to your strike arrow.
For example, if you want to hit the 2-pin and your strike arrow is the 2nd arrow, or 10th board, shift your aim 2 boards to the left to the 12th board.
When the remaining pins are right of center:
There is an extra step with this spare system if the remaining pins are to the right of center. First find the 10-pin line, which is the line you use to make a 10-pin conversion, and use this line to adjust your position. With this spare system, you will adjust your aim 2 boards to your left to hit the 6-pin. If you want the 3-pin, you adjust your aim 4 boards to the left.
If the 10-pin is the key pin, shift your aim to the 3rd arrow and find the board.
If the 6-pin is the key pin, shift your aim 2 boards to the left.
If the 3-pin is the key pin, shift your aim 4 boards to the left.