X-Guard Ladder (Pearson Brazilian Jiu-Jitsu)
Alex, Pearson Brazilian Jiu-Jitsu (Northfield): X-Guard | 4 Task Based Games to Develop Your X-Guard. The source credits Greg Souders of Standard Jiu-Jitsu as the inspiration.
From this series
Build tonight's class
You're on rung 1. Climb up in order. The last rung is the won position.
Adapted from the original page. Phase ladders. Climb up: the last rung is the won position.