A split stack resembles a horizontal stack, however it simplifies things by assigning cutters a partner and a side of the field.
In this example, 4 and 5 are partners and limit their cutting movements to just one side of the field.
See how they alternate their deep and under cuts.
This is highly effective at ensuring that players are not cutting off their teammates or clogging throwing lanes.
6 and 7 will be doing the same thing, on their side of the field.
This opens up opportunities for handlers to find a target both on the break and the force side of the field, as well as under and deep cuts.
This works really well, when the disc is in the middle of the field.
However, it is harder to involve all 4 cutters, when the disc is trapped on the line.
In this situation, 6 and 7 might cut closer to the side line, where 4 and 5 could shift slightly over that divider line.
with cuts continuing like so.
Ideally, the handlers can work the disc back to the middle of the field, so that there is more space to work with.
If the disc is swung all the way over to the break side, it is less important for the cutters to condense or for the handler to reset to the middle, since the handler can still hit all 4 potential cutters.