You
are playing Yellow, approaching hoop 2. You would like to dig Black out of corner
3 if you could.
Where should you try and rush Blue to after making the hoop, X1, X2 or X3?
If you are happy to leave black in corner 3 then X1 is a good option (3-ball break style).
If you are going to dig black out, you might go for X2 as a good place to leave Blue as a pivot. You then take off to Black and send it to hoop 4 while holding for Red at hoop 3. Instant 4-ball break. The problem is the take off to corner 3 from X2.
Better still is to rush to X3 - it's a shorter take off and there's nothing in the way. X3 isn't too bad as a pivot (you can always move it nearer the middle with a thick take off).