Crusader

That is not correct. A cut block is a legal block aimed at a defensive players legs, prefferably his thighs. A chop block on the other hand is illegal and consist of on guy blocking a defender high while the other guy blocks him low. This is also commonly referred to as a "high-low" and carries a great risk of injury.

Here is a good example of a chop-block:

This is a good example of a cut block. You can see the center moving towards the defender but never engaging him. It leaves the LG blocking the DT, a perfctly legal block.


And lastly is a pretty good clip of Zone blocking.

Zone blocking don't have to incorporate cut blocks at all. The U15 team I coach run a lot of zone and in our age group cut blocks are banned. Zone blocking is basically just about angles and point of attack. Cut blocking is however easily utilised and very effective in this scheme, especially on the backside of a play which often opes up enormous cut back lanes. Cut blocks are generally frowned upon by defensive players but IMO a great way to balance out the fact that defenders are allowed to grabb and pull with their hands.

W.T. Sherman is my favorite General. After all he did order Atlanta to be burned to the ground.