Is there a rule for predicting CB direction for a draw shot similar to the 90° rule for a stun shot and the 30° rule for a rolling CB shot?

Yes. It is called the trisect (or 3-times-the-angle) system, which applies to a”good action” draw shot for cut angles smaller than about 40° (i.e., ball-hit fraction greater than about 3/8). You can use a modified version of the Dr. Dave peace-sign technique, or your cue, or your fingers measuring distance to predict the final cue ball direction. Here’s a good video demonstration from Vol. I of The Video Encyclopedia of Pool Shots:

Here’s another video, from Vol. II of the Billiard University (BU) Instructional video series, that shows how you can use the trisect system effectively when you have ball in hand:

And here’s an example from Vol. II of How to Aim Pool Shots (HAPS) showing how the trisect system can be used to aim non-ball-in-hand carom shots:

For more information and demonstrations, see:

Here’s a convenient 1-page trisect system resource page summarizing the important concepts.

See also: shot speed effects.

Close Menu