Back of the stack cuts under. Rest of the stack except for the front (blue #3) pushes backwards.
If it's open, hit it. If not, cutter clears to the middle of the stack, and next cutter goes from the back of the stack.
Lather, rinse, repeat.
Lather, rinse, repeat. If someone's open, hit him.
The thrower also has the option of hitting the front of the stack on the break side.
If you have a skilled thrower, this is a good option
If the disc's on the sideline, the dump will be on the break side.