Two-way shots: short or long, still a point

Every stroke comes out a little short or a little long. A two-way shot is one where both still score: short, the cue ball hits the second ball directly; long, it misses, goes two more cushions around the corner, and hits the ball from behind.

Where the ball has to be

The second ball sits out from a corner, a couple of diamonds along, so the cue ball's route passes it on the way into that corner. That's the whole trick:

Between the two there's usually a narrow miss, but it's a far smaller one than on a route that only has one way in. The ball doesn't need to be near a rail for this; it needs to be the right distance out from the corner, in line with where the route goes.

Short: the white plays off the red, around the top, left and bottom cushions (off the left cushion near the 1.3 diamond) and runs straight into the yellow, which sits about two diamonds out from the top-right corner. Open this position in the trainer
Long: the same shot comes off the left cushion near the 2.3 diamond, passes the yellow, takes the right and top cushions of the corner and comes back to hit it from behind. Short or long, it's a point; the engine gives this shot 90%. Open this position in the trainer
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How to look for them

When you've found a route, follow it past the second ball. Where does the cue ball go if it misses long? If the second ball sits a couple of diamonds out from the corner the route is heading for, a long miss goes into that corner and comes back at the ball: you've found a two-way shot. If a long miss runs off into open table, the shot is one-way and needs the stroke to be exact.

Given two routes of similar difficulty, play the two-way one. It turns your most common error, coming up a little long, from a miss into a point.

Using it on purpose

In the trainer: the engine plays every candidate many times with small errors in aim, speed and spin. A two-way route keeps scoring when those errors push it long, so its odds come out higher, and it rises up the ranking.