20.5
For time, partitioned any way:
40 muscle-ups
80-cal. row
120 wall-ball shots, 20-lb. ball to 10 ft.
Time cap: 20 min.
When this was announced, it was already my favourite workout ever. Choosing your own adventure in crossfit, I'm in! The row and wall balls were always going to be just a hindrance. If I were to just do those 2 as fast as possible, it would probably be around 12 minutes. So I had to come up with a plan to try and maximise my muscle ups, while still getting the other work done.
My plan was:
First 2 minutes - AMRAP muscle ups when fresh
Then 8 rounds, each lasting 2 minutes of:
15 wall balls
10 cal row
0-2 muscle ups depending on how close to failure I am and whether I have time left for a 2 minute round
That would take me to 18 minutes, which would leave me 2 minutes of just muscle ups at the end.
For reference, 206 reps is 50th percentile. I would have been satisfied with anything above 215.
First 2 minutes - I managed 8 singles. They felt solid and I wasn't close to failure
Wall balls - I split them up 8+7 for the first 4 or 5 rounds, then 5+5+5 after that. The break between sets was around 5 seconds.
Rowing - This was just recovery, so that I could get 1 muscle up after. I started out at around 700-750 cal/hour. Round 8 was maybe 500/hour because I wanted to go straight into muscle ups.
Muscle ups - I think I did 4 in total in these 8 rounds (not counting reps after round 8). I think it was something like 1, 1, 0 (15 seconds lost getting my foot out of the rower), 1, 0, 0, 1. In the middle rounds, I was getting tired and just wanted the wall balls and rowing out of the way.
I finished at 18:05, so bang on schedule. I think I got 5 more before the time cap.
217 reps. I'm really pleased with it. I think I came close to maximising my score. I didn't stand around a lot and kept working. The slow pace on the rower was key to that. I didn't fail a muscle up rep.
Bonus
video taken by my girlfriend. Given how smooth that muscle up looked, I would guess it was in the first 2 minutes.