Spares Systems

2-4-6 ...   This system involves a player keeping their feet on the same boards by the foul line, but aiming for different target arrows to modify their strike line for the spare. For instance, if a player has a strike line of 17-10 (feet on board 17, ball delivered over board 10, the second arrow), modifying the strike line to 17-12 should ensure that the ball enters the pocket hitting the 2-pin, instead of the 1-pin (3-pin for left-handers). Similarly, moving the target by four boards should result in a line to the 4-pin for right-handers and the 6-pin for left-handers, while a six board shift will target the 7-pin and 10-pin in each direction respectively.

3-6-9 ...   In this system, players use the same target arrow, but move their feet by three, six or nine boards along from the approach position of their strike line. If a player moves their feet further to the outside of the lane but aims for the same target, then the ball will enter the pocket further towards the inside of the lane. Using the same strike line as above (17-10), a 14-10 line should ensure a hit on the 2-pin for right-handers, while 11-10 will result in a 4-pin hit, and an 8-10 line should see the ball hitting the 7-pin.

3-1-2 ...   The 3:1:2 ratio system means that a 2-board adjustment at the starting position causes a 1-board difference in the finishing position at the foul line and a 3-board difference at the pins.

3-1-2 spare system This adjustment technique can be used on any evenly-dressed lane condition and with any speed of delivery or any size of hook or curve. The system depends on ratios that exist between the various markers-spots on the approach and the lane.
The explanation of the 3:1:2 system is fairly simple. In the accompanying diagram, the pins are 45 feet from the arrows. The arrows are 15 feet from the foul line. The starting dots are 30 feet from the arrows. The initial ratio of all these points is thus 45:15:30. Dividing by 15, the greatest common divisor, reduces the ratio to 3:1:2. Because the ball is delivered and pivots on the second arrow, a move of 2 boards at the starting position results in a change of 3 boards at the pins.

All bowlers should be encouraged to use this ratio adjustment system. It is a positive method for making adjustment and eliminates guesswork. Adjustments should always be positive and deliberate. However, as in all successful bowling methods, the delivery should be consistent.

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