Nn6/8/6r1/8/K7/1P6/1R6/3k2N1 w - - 0 1
Devious Chess Ending Study
Can you find the winning plan? I struggled with this for a long time when I first saw it.
Editor
As a hint- if you have to give up a knight as white, and you do, which one would you think it better to concede? I would hope by this time you realize that the black king will march on the white rook in some lines undermining the safety of the knight on g1- so how can white force black to win the "right" knight?