[littlestymaar]

Especially for volleyball, because the only open question are: “to which attacker the setter will pass”, “where's the attacker going to attack” and “will the defense be able to get the ball”.

For the “nine well-defined classes: spiking, blocking, set- ting, running, digging, standing, falling, waiting, and jumping” used in the paper, the only things that are hard to predict is “jumping”, for the attackers, because it depends on who the setter will pass the ball to, and who's going to be “falling” because it depends where the attacker will shoot the ball and which defender is in range to catch it.

I've just tried to do it on a Youtube video, and it's actually a pretty fun game to play for a minute or two. (I think I'm above 85%, despite not having practiced volley outside of school's sport classes and never having watched it on TV, so I'm pretty convinced your 95% figure is well within reach of a skilled player).