Two Ways to Draw

It's bad enough to miss a draw but worse when you miss two ways to draw. On my turn to move, I played 51...Rh3. I could have drawn the game with 51... Nd4+ 52. Ke1 Nc2+ 53. Ke2 Nd4+. The same goes if I have gone 51... Nf4+ 52. Ke1 Ng2+ 53. Ke2 Nf4+. It's an intriguing position since it contains two ways to draw, using the same piece, and the same drawing technique.