1. The break does not choose your group
Pocketing a solid during the break does not automatically make you solids. In Rackbi the table is still open afterwards. Watch the group indicator and the next legal group-establishing shot rather than committing to a route from the break alone.
2. You do not call the pocket
Rackbi does not ask you to nominate a ball or pocket, including for the eight. A fortunate pot can count when the shot is otherwise legal. That does not cancel requirements about the first ball contacted or turn a foul into a legal shot.
3. The final group ball and eight need separate shots
Suppose only your seven ball and the eight remain. You pocket the seven, but the eight also falls on that same stroke. In Rackbi that is an early eight and loses the rack. Leave the eight alone until your group has been cleared on a previous shot. If the cue ball scratches as you pot the eight, that also loses the rack outside the break procedure.
4. A strange break result needs a choice
An eight on the break, a break foul and an insufficient break do not all produce the same next state. Read the offered choices before confirming. Accepting the layout after an insufficient break does not by itself grant ball in hand. The prompt matters more than a rule remembered from another app.
5. Ball in hand still has conditions
An ordinary foul generally allows placement anywhere on the table, but a behind-the-line placement situation has its own restrictions. Check the highlighted placement area and finish placing before shooting. Do not assume every restart lets you put the cue ball anywhere.
A useful habit is to read the ruling immediately after a surprising shot. Then inspect the group, turn and placement indicators before adjusting aim. These five examples describe Rackbi’s implementation; the full rules guide covers more exceptions.