Originally posted by endgamerFrom Wikipedia : -
Is it possible to win in a K,R,NvsR,K endgame?
"Rook and a knight versus a rook: this is a theoretical draw, but Judit Polgar lost a famous game to Garry Kasparov when she blundered in a quickplay finish (a sudden death time control) (Nunn 2007:159–61,165). There are five cases that are wins when the defending king is restricted to the edge of the board (Grivas 2008:257)."
Game was in 1996.
According. to the book Fundamental Chess Endings by Muller and Lamprecht, it is a draw. However their opinion is that it is worth playing on if the defending king is confined near the edge of the board. If it is in the corner, the chances of winning are good. The game J. Polgar-Kasparov mentioned in an earlier post was referred to.