Mesh concept was used all over the place versus TB to beat man coverage. Simply put, the mesh concept is criss crossing routes where the route runners are close to each other with regards to depth of the route. This is different than the high-low concept which is used to beat zone coverage where the routes have a big difference in the depth of the routes.
Play #1 (thumbnail post #56 of this thread)
49ers: 12 personnel - Mesh concept out of a bunch formation
TB: Zone coverage
In theory, this concept will not work against zone coverage and we will see it not gain much here. This is the first pass play of the game. The thumbnail will detail the routes being ran.
Below: The coverage by TB. Cover2, zone under.
Below: Celek is the player setting the mesh (pick). VD will be the beneficiary. But this is zone coverage and no TB defender will be getting picked off.
The play in full: Notice as VD catches the ball, he is smacked by the zone LB as the LB is able to attack downhill to apply a sure tackle for a somewhat minimal gain. Not a horrible play result, but not a big play by any means.
Take a look at the thumbnail post #56 to get a sense for how often HaRo went to this concept. It doesn't have to always be criss crossing over the middle of the field. Plays 12, 14, 27 also use the mesh concept, but on one side of the formation.
[ Edited by thl408 on Dec 17, 2013 at 3:43 PM ]