Draw?

[Jack Lad]

[d] k3K3/6pp/p4p2/1p6/4R3/2p5/7P/8 w - - 0 1
This seems to be a win for white.



[d] k3K3/6pp/p4p2/1p6/4R3/2p5/4P3/8 w - - 0 1
This seems to be a win for black.

[Jack Lad]

[d] 5k2/3p4/8/6p1/2n5/1N2p3/P2n3P/1N2K3 w - - 0 1
This seems drawn but is this actually a very difficult win for white?

E.g.
1. N1xd2 exd2+ 2. Nxd2 Ne5 3. Kf2 Ke7 4. Nf3 Nf7 5. Kg3 Kd6 6. Kg4 Kc5 7. Nxg5 Nh6+ 8. Kh5 Ng8 9. h4 d5 10. Kg6 Kc4 11. Kg7 Ne7 12. h5 d4 13. Kf7 Nf5 14. Kf6 d3 15. Ne4 Nh6 16. Kg6 Ng8 17. Kg7 Ne7 18. Kf6 Ng8+ 19. Kg6 Kb4 20. Kg7 Ne7 21. Nd2 Ka3 22. Kf6 Ng8+ 23. Kf7 Nh6+ 24. Kg6 Ng8 25. Nb3 Ne7+ 26. Kf6 Ng8+ 27. Kg7 Ne7 28. Kf7 Nf5 29. Kf6 Nh6 30. Kg6 Ng8 31. Kg5 Kb2 32. Kf5 Nh6+ 33.Kg6 Ng4 34. Kg5 Ne5 35. Kf5 Nf7 36. Kg6 Ne5+ 37. Kg5 Nf7+ 38. Kf4 Kc2 39. Nd4+ Kb2 40. Ke3 Kc3 41. Nb5+ Kc2 42. Na3+ Kc3 43. Nb1+ Kc2 44. Nd2 Nd6 45. Nf3 Kc3 46. a4 Kb4 47. Kxd3 1-0
[d] 8/8/3n4/7P/Pk6/3K1N2/8/8 b - - 2 47

Or
38. Kf4 Nh6
[d] 8/8/7n/7P/5K2/1N1p4/Pk6/8 w - - 48 39
39. Nd2 Ng8 40. Ke5 Kxa2 41. Kd4!! 1-0
[d] 6n1/8/8/7P/3K4/3p4/k2N4/8 b - - 53 41