For as long as possible:

From 0:00-3:00
2 rounds of:
10 overhead squats (95 / 65 lb.)
10 chest-to-bar pull-ups

From 3:00-6:00
2 rounds of:
12 overhead squats (95 / 65 lb.)
12 chest-to-bar pull-ups

From 6:00-9:00
2 rounds of:
14 overhead squats (95 / 65 lb.)
14 chest-to-bar pull-ups

Etc., following same pattern

(If you fail to make the rep sequence in the allotted time, continue workout as an AMRepsAP in 16 minutes.  Stay with the rep sequence you failed at.  For instance, if you did not get the two rounds of 14 OHS and C2B by the 9 minute mark, continue with that sequence until the 16 minute mark.  The athlete will have two scores:  A 15.2 score and an 16 minute AMRepsAP score.  There are also Scaled and Masters versions listed on the Open site.)