Mobilize, then:

3 rounds:
:30 sec plank pushup hold on rings
5 box jumps
15/12 cal ski erg

A.
Take 8-10 minutes to build up to 75% of your back squat, and then …

Every 2 minutes, for 12 minutes, complete:
Back Squat x 1 rep @ 80-90%

B. Crossfit open 2019 #1

15 amrap

19 cal row

19 wall-balls