2-4-6 Spare System
(Left Handers)
For left handed straight and hook bowlers and for right handed backup bowlers.
The 2-4-6 system has a slightly higher percentage of achieving the spare than the more commonly used 3-6-9 but it is harder to implement in the first place as it involves picking out an individual BOARD at the arrows, rather than a particular arrow, which is easier to see. For that reason, it is probably more beneficial to the more experienced bowler who is used to moving their target on the lane.
Establish a line for the strike and 7 pin in your warm up practice time.
For pins RIGHT of the headpin:
Use the headpin target at the arrows as your starting point.
Keep your feet in the same place and move your target at the arrows (15 feet down the lane) two boards to the right per pin away from the headpin. I.e. for the 3 and 9 pins, move your target TWO boards RIGHT, for the 6 pin, move your target FOUR boards RIGHT and for the 10 pin, move your target SIX boards RIGHT.
For pins to the LEFT of the headpin:
Use the 7 pin line as your starting point.
Again, keep your feet in the same place on the approach and move your target on the lane. Move your target two boards right for each pin away from the seven pin, i.e. for the 2 and 8 pins, move your target FOUR boards RIGHT, for the 4 pin move your target TWO boards RIGHT and for the 7 pin, make no adjustment.
For the 5 pin - make no adjustment to your normal strike line unless you have a big hook, in which case you should move your target half a board LEFT to ensure hitting the 5 pin