Any ideas ?

From a recent TL game....

Black has played 45...Kf7.  White is ahead in material, and to play...any ideas ?

45....Kf7

The game continued as below ( highlight between the brackets to see), and fizzled out to a draw, but I think White can do better.

[46.Rd8 g5 47.Rxd2 Nxd2 48.hxg5 Ne4+ 49.Kh4 Nxf6 50.gxf6 Kxf6 51.Kxh5 ]