Force is flick, off-disc defense sets up on force side.
Defense follows cutters in and out.
If cutters cut horizontally/diagonally across field, defense stays in same respective position.
If defense sets up straight in front of offense...
cutters can easily get around to open space.
If close to the endzone, defense should be further out on force side (poaching) because limited space causes cutters to make horizontal cuts. You don't need to worry about being in front of them, because they cannot easily cut vertically toward the disc.
Defense should always be closer to the force sideline because outside-in throws are very common with horizontal cuts in the endzone.
For example, if the defense sets up too close to offense in the endzone...
the thrower can easily curve the disc around the defense.
But if the defense stays far on the force side...
the defense can block off that throw.
As the mark (6), it is very important that you hold the force and do not get broken.
If the mark is broken, the off-disc defense is now on the wrong side of their opponents...
this gives the other team an advantage that we do not want to give them.
If the mark does get broken, it is important that the defense quickly shifts to correctly mark their opponent so they cannot get anymore break throws. To do this, we can use a technique that some people call 'swooping'...
If the thrower gets a break throw to the break-side handler (5), the new mark (5) needs to 'swoop' into the break side to immediately cut off another break throw. In order to ensure you cut off that break-throw, often your 'swooping' momentum will often carry you farther over to the break-side than typical marking position. So...
after the break throw is cut off, the mark may then resume a normal mark position