It is rare to spot a necessary underpromotion in the wild, but one did occur during the current Ballarat Begonia Open. Normally underpromotions are either designed to annoy your opponent, or playing to the crowd, but in this game, it was to avoid a stalemate trick. In this case a bishop would do just as well as a knight, but both Queen and Rook would definitely change the result of the game.
Begonia Open 2021 Ballarat (5.2), 07.03.2021
1. d4 e6 2. c4 Nf6 3. Nc3 Bb4 4. Bd2 O-O 5. e3 b6 6. Bd3 d5 7. Nge2 Ba6 8. b3 c5 9. Nb5 Bxd2+ 10. Qxd2 cxd4 11. Nexd4 dxc4 12. Bxc4 Bb7 13. f3 a6 14. Nc3 b5 15. Be2 Qb6 16. Kf2 Nbd7 17. b4 Rfd8 18. Qb2 Rac8 19. Rac1 Qd6 20. a4 bxa4 21. Ra1 Nb6 22. Nxa4 Nxa4 23. Rxa4 Nd5 24. Ra3 Nxe3 25. Rxe3 Qxd4 26. Qxd4 Rxd4 27. b5 Rc2 28. bxa6 Bxa6 29. Ra1 Rd6 30. Kg3 Bb7 31. Rb3 Rd8 32. Bd3 Rc7 33. Ra7 Bd5 34. Rxc7 Bxb3 35. Kf4 g5+ 36. Ke3 Bd5 37. Bc2 Ra8 38. Rc3 Kg7 39. g3 h6 40. h3 Ra1 41. Bd3 Rh1 42. Kf2 Rh2+ 43. Kg1 Rxh3 44. Kg2 g4 45. Be4 Bxe4 46. fxe4 Rh5 47. Kf2 Rh2+ 48. Ke3 e5 49. Rc5 f6 50. Rc7+ Kg6 51. Rc8 h5 52. Rg8+ Kh7 53. Rb8 Rg2 54. Rb6 Kg6 55. Rb8 Rxg3+ 56. Kf2 Rf3+ 57. Kg2 Re3 58. Rb4 h4 59. Kf2 Rf3+ 60. Kg2 h3+ 61. Kh2 Rf2+ 62. Kg3 Rg2+ 63. Kh4 h2 64. Rb1 Rg1 65. Rxg1 hxg1N 0-1
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