As Joker says. Its Geometry Folks.

While many defense can be built in geometric fashion, Jacks just falls in place when the triangles are built right! In fact, your MPP's (One Taskers) can Start in this defense when you build it right.

Outside In, Topside Down, Field and Boundary!

Rate your Position Players 1-3 or 4 if you must. 1 being Stud and 3or 4 Being a One Tasker!

Sit and look at the Triangles, Run Fit First, and you should see how putting the a combination of 1's and 2's can help the 3 or 4 succeed and Vice Versa.

For instance.

Base.

Boundary..............................................................Field

(Short)...................................................................(Wide)

......................,DB1...................................DB2

.............OLB2.........................M1........................OLB1

...DE 2.............DT1.........DG3........DG3.......DT2.........DE1

In other words cheat the weak side first! The 3's are covered by 1 and 2's The 2's are covered by 1's.

Draw the Triangles here. Mike 1 Covers the 2, DG3's. Mike 1 is covered by an 1 and 2 DB. OLB1 and DE1 Cover the DT2. DT1 and DB1 cover the OLB 2 and DE2.

DE 1 is Speed and Aggression. Blow it up!

DE 2 is slower but aggressive (Still one of the faster kids)

OLB 1 is a smaller Mike 1, Covers Area and Hits like a truck!

OLB 2 is a Strong Safety Type, Quick, covers area, and a sure tackler!

DT1 is your Best or BEAST Linemen!

DT2 is the next best thing!

Mike 1 is your BEAST! He chews up ground quickly and hits like a Freight Train! Fearless! "HULK SMASH!"

DB1 is the smart kid who understand filling the Alley and not getting beat deep. Down Hill Kid!

DB2 is the lesser of 2 evils. He will get picks on Passing plays but, sometimes forgets to run the Alley. Here's your tweener. Can cover and tackle but forgets his reads! Reminder, he's covered by 2 Number 1's.

Hope this basic analysis helps!