After the 2nd PC, you're left with 1 piece from a bag. Make a setup based on this piece.
One of the best situations for 3rd PC. It's good to know how to save O for 3rd PC.
The same shape as Extra O but less consistent to setup.
One of the best situations for 3rd PC. There is a chance to be able to use the same shape as the Extra O pattern.
Do the 97% pattern if you can. If it isn't possible, which will be the case most of the time, you have to freestyle.
Avoid this situation if possible. There is a slight chance to be able to use the same shape as the Extra O pattern, which you should do if possible.