And easier one, but you have to spot the shot for it to be easy. (solutions below)
Some sketches containing the Outside Passed A-Pawn.
We start with a basic example.
reboot - Massimiliano Perna RHP 2017
FEN
8/p4K2/6bp/kp6/6P1/5P2/8/8 w - - 0 46
[FEN "8/p4K2/6bp/kp6/6P1/5P2/8/8 w - - 0 46"] 46. Kxg6 b4 47. Kxh6 b3 48. g5 b2 49. g6 b1=Q 50. g7 {You can see the idea. Black is going to swap Queens and the a-pawn wins.} 50... Qh1+ 51. Kg6 Qg2+ 52. Kh7 Qxf3 53. g8=Q Qh5+ 54. Kg7 Qg5+ 55. Kf8 Qxg8+ 56. Kxg8 Kb4 {The a-pawn promotes 0-1.}
Next a no nonsense approach from Black showing how it should be done.
stephen001 - tazforky RHP 2018
FEN
8/8/p7/P1k2K1p/7P/6P1/8/4b3 w - - 0 46
[FEN "8/8/p7/P1k2K1p/7P/6P1/8/4b3 w - - 0 46"] 46. g4 hxg4 47. Kxg4 Bxh4 {Black has counted the squares perfectly. The White King cannot make it a draw.} 48. Kxh4 Kb5 49. Kg3 Kxa5 50. Kf3 Kb4 51. Ke3 Kb3 52. Kd3 a5 53. Kd2 Kb2 {The a-pawn is guided home.}
Now in typical RHP blog fashion this ending screwed up.
It’s not uncommon to see this ending misplayed on here.
Ruprecht - imetfischer, 2018
FEN
8/p4k2/8/8/P1P3p1/2P2r2/6K1/2R5 w - - 0 44
[FEN "8/p4k2/8/8/P1P3p1/2P2r2/6K1/2R5 w - - 0 44"] 44. Rf1 Rxf1 45. Kxf1 Ke6 46. Kf2 Kd6 47. Kg3 {Because Black has to pick up the c-pawns this is a draw.} 47... Kc5 48. Kxg4 Kxc4 49. Kf4 Kxc3 50. Ke5 Kb4 51. Kd5 Kxa4 52. Kc6 {Kc4 draws The White King keeps the Black King on the a-file.} 52... a5 53. Kc5 Kb3 {White resigned. But I'll use this game to show you the draw.} 54. Kb5 a4 55. Kc5 Kb2 56. Kc4 Ka3 57. Kc3 {This is the type of position White could have forced.} 57... Ka2 58. Kc2 Ka3 59. Kc3 Ka2 60. Kc2 a3 {Not Kc3 because then plays Kb8 and wins.} 61. Kc1 Kb3 62. Kb1 a2+ 63. Ka1 Ka3 {I repeat this never happened.}
Another example of the no messing about way. Black takes it into a risk free ending.
Robert Matheson - MurphMikej RHP 2016
FEN
8/8/p5k1/8/1r6/8/1NK5/8 w - - 0 52
[FEN "8/8/p5k1/8/1r6/8/1NK5/8 w - - 0 52"] 52. Kc3 Rb5 53. Nc4 {Careful. Kf6 Nd6+ and it's a draw.} 53... Kf6 {Black spotted it. RHP is full of games where a Knight fork has been missed.} 54. Na3 Rb8 55. Kc4 Ke5 56. Kc5 Ke4 57. Nc4 Kd3 58. Ne5+ Kc3 59. Nc6 {Black has got the King across to shepherd home the a-pawn.} 59... Rc8 60. Kb6 Rxc6+ {Fed up going boss-eyed looking for Knight forks White takes the easy path.} 61. Kxc6 {Careful. The hasty a5 meets Kb5 and the a-pawn falls.} 61... Kb4 62. Kd5 a5 63. Kd4 Kb3 64. Kd3 Kb2 65. Kc4 a4 66. Kb4 a3 {The a-pawn sails home.}
Now a complete typical RHP game full of missed tactical chances.
Mitchapolooza (1410) - bdh191 (1393) RHP 2018
1. e4 e5 2. f4 Bc5 {As good way of declining the King's Gambit.} 3. Nf3 d6 4. Bc4 Nc6 5. d4 {A pawn sac that does not appear to give White anything.} 5... Nxd4 6. fxe5 Bg4 7. Bxf7+ {Now we see the idea behind the d4 pawn sac. it is unsound.} 7... Kf8 {7...Kxf7 8.Ng5+ Qxg5 and Black comes out of it a piece up.} 8. a3 {That is wrong. White got away with the unsound sac. 8.Rf1 was better.} 8... Nxf3+ {8...Bxf3 9.gxh3 Qh5 was strong, though i8...Nxf3+ not too bad.} 9. gxf3 Qh4+ 10. Kd2 dxe5 11. fxg4 {Now take the f7 Bishop.} 11... Rd8+ 12. Bd5 {Due to Black not taking his chances White is coming out of this OK.} 12... c6 13. Qf3+ Nf6 14. c4 cxd5 {Black has won their piece back and the game is back in the pot.} 15. exd5 Qf2+ {In this position taking the Queens off favours White. 15...Kf7 get the h8 Rook into the game.} 16. Qxf2 Bxf2 17. g5 {This is OK. A good looking move is 17.Rf1.} 17... Ne4+ 18. Ke2 Bd4 19. Rf1+ Ke7 20. Kd3 {Leave the King alone. Get Queenside out. 20.Nc3.} 20... Nc5+ 21. Kc2 Rhf8 22. Rxf8 {22.Nd2 develop. White is drifting a bad position.} 22... Rxf8 23. Bd2 Rf1 {23...Rf2 with Ne4 threats keeps White tied up.} 24. Ra2 {Unpins the Knight.} 24... Ne4 25. Bb4+ Kd7 26. Nd2 {Puts White in more trouble. 26.h4 save a pawn and see what happens next.} 26... Rf2 27. Kd3 Nxd2 {27...Nxg4 gives Black a healthy plus.} 28. Bxd2 Rxh2 29. Bf4 {OOPS! Once again White jumps in with faulty tactics} 29... Rh3+ {Correct.} 30. Ke4 {Now 30....Rh4 wins the f4 Bishop and 0-1.} 30... exf4 {OOPS! Black missed it.} 31. Kxd4 Rh2 {White should just let the b2 pawn go. It's better than having a Rook on a2.} 32. Ke4 Rc2 33. Kd3 Rh2 34. Ke4 f3 35. Kxf3 Rc2 {36.Ra1 and Rh1 get that Rook active.} 36. Ke3 Rxc4 37. b4 Rg4 38. Rf2 Ke7 39. Rf5 {In Rook endings, given the choice always go active. 39.Rh2 hitting h7.} 39... Rg3+ 40. Rf3 {Taking the Rooks off is wrong. Black creates an outside h-pawn, then an outside a-pawn.} 40... Rxf3+ 41. Kxf3 Kd6 42. Ke4 h6 43. gxh6 gxh6 {There is the outside h-pawn which drags the White King away from the a-pawn.} 44. a4 h5 45. a5 h4 46. b5 h3 47. Kf3 Kxd5 48. a6 bxa6 49. bxa6 {Do not get cute here and play 49....h2 that would be a draw.} 49... Kc6 50. Kg3 Kb6 51. Kxh3 Kxa6 52. Kg2 Kb5 {The guard dog keep the fox away from the chicken.} 53. Kf2 Kb4 54. Ke2 Kb3 55. Kd2 Kb2 56. Kd3 a5 57. Kc4 a4 58. Kb4 a3 {The chicken reaches a1 and lays a golden egg.}
1) M. Fuller - L. Evans, Haifa Olympiad 1976
FEN
3kr3/1p4Q1/p7/3p4/1PP2n2/8/P4qPP/3R3K w - - 0 1
[FEN "3kr3/1p4Q1/p7/3p4/1PP2n2/8/P4qPP/3R3K w - - 0 1"] 1. Qg3 {The starting test position.} 1... Qxg3 {Other sensible win but this is the best.} 2. hxg3 Ne2 {Threatening mate with Rh8} 3. Rxd5+ {I hope you found and bust this defensive idea.} 3... Kc7 4. g4 Rh8+ 5. Rh5 {Now the move I wanted you to find.} 5... Ng3+ {White ends up a whole Rook up. An easy win.}
2) M. Tal - D. Ciric, Sarajevo, 1966
FEN
5kr1/3p1p2/p7/2PPQ3/3P4/6P1/p4PK1/1q5R w - - 0 1
[FEN "5kr1/3p1p2/p7/2PPQ3/3P4/6P1/p4PK1/1q5R w - - 0 1"] 1. Rh8 {Now 1...Rxh8 2.Qxh8+ Ke7 3.d3+ Ke6 4.Qe5 Mate. I hope you saw that.} 1... a1=Q {Did you see this one. The move actually played.} 2. Qd6+ Kg7 3. Qh6# {Checkmate.}
3) H. Mecking - A. Rocha, Mar del Plata, 1969
FEN
rk5r/2p3pp/p1p5/4N3/4P3/2q4P/P4PP1/R2Q2K1 w - - 0 1
[FEN "rk5r/2p3pp/p1p5/4N3/4P3/2q4P/P4PP1/R2Q2K1 w - - 0 1"] 1. Rb1+ {1...Kc8 then 2.Qd7 checkmate. You saw that yes?} 1... Ka7 {And now a simple deflecting of the guard.} 2. Qd4+ Qxd4 3. Nxc6 {Another Rook and Knight mate.}