Question...Is Rook and Knight vs Rook a draw?
That's not anastasias mate. Anastasias mate involves a queen sac and a knight on d2, e2, d7, or e7 blocking the kings escape. Also, Rook to swing over to the A or H file to deliver mate.
People he said Rook and Knight vs Rook, not Knight vs Rook. And yes in most circumstances its a draw.
[24.Rf2 g6 25.Bh3 (25.Bd3? Bd5–+) 25...Ne4 26.Re2 f5µ] 24...Bd5! [24...Bxg2 25.Bd3 Rb7 26.Qc4„] 25.Qxg7 Rg8 26.Qh6 Bxb3! [26...Bxg2? 27.Bd3 Bxh1 28.Rxf6 Rg1+ 29.Kb2 (29.Ka2!?) 29...Qe1 30.Bf1!? Bb7 31.Qf4+±]
its a theoretical draw, but some cases are a win
What you mean is that most positions are theoretical draws but some are theoretical wins. To be complete, some others are theoretical losses!
To be entirely comprehensive here are the full stats. Some of the anomalous results are significantly deeper than mere hanging pieces and immediate mates.
It depends upon the players if a 1200 elo is playing then it could be a draw but if a 2000 elo is playing then it could be a win