Annotated Game #338: A queen ending, or a comedy of errors

I should have drawn the following tournament game, an Exchange Caro-Kann, at multiple points. However, my opponent pressed effectively and induced errors on the defense, ending up with what should have been a won queen ending (after it was very much a drawn queen ending). A comedy of errors then ensued, with a draw at the end - which was the right outcome from my perspective, even if wrongly achieved. Still, "drawing ugly" is almost as good as "winning ugly". The overwhelming importance of queen activity, especially versus a bare king, is a major takeaway from examining the ending.

[Event "?"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "Class B"] [Black "ChessAdmin"] [Result "1/2-1/2"] [Annotator "ChessAdmin/Dragon 3.2"] [ECO "B13"] [WhiteFideId "-1"] [BlackFideId "-1"] [PlyCount "172"] [GameId "2271414718922553"] 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 {the Exchange Variation has become quite popular again.} Nc6 5. c3 Nf6 6. h3 {an alternative to the standard Bf4, it prevents ...Bg4, which is a key move in the main line for Black.} g6 {supporting the alternate way to develop the light-square bishop, to f5.} (6... Qc7 {defers the bishop development and prevents Bf4. This position is often reached via transposition, with ...Qc7 having been played earlier on move 5.}) (6... e5 $5 {is the principled response and the engine favorite, taking advantage of the absence of a Bf4 for White to break in the center.} 7. dxe5 Nxe5 $11 {Black in exchange for an isolated queen's pawn is more active and will either gain a tempo on the Bd3 or can exchange it to obtain the two bishops.}) 7. Nf3 Bf5 8. Bxf5 {the critical line, creating a significant structural imbalance.} gxf5 9. Bf4 e6 $11 {this is perfectly viable, but it runs into some unfamiliar awkwardness after White's next move.} (9... Rg8 {is more direct and comes with tempo, forcing White to defend the g-pawn. I think this is also a better practical move-order, since Black wants to play this anyway.}) 10. Qb3 Qd7 $6 {the problem with this is White's next move.} (10... Qb6 {reduces the amount of threats White can make, as Black can now exchange queens if needed.}) 11. Ne5 Nxe5 12. Bxe5 {this awkward pin would not be an issue with the rook on g8.} Be7 13. Nd2 {White has a slight advantage, as her pieces coordinate better, but Black is solid enough after} Rg8 14. Rg1 $6 {this allows me to improve my position, but I do not assess the middlegame properly.} Rc8 {this does not hurt, but it does not particularly help me accomplish anything, either.} (14... Ne4 15. Nxe4 fxe4 16. O-O-O f6 17. Bf4 O-O-O $11) 15. f3 {clearly intending to ram through g2-g4, but I miscalculate the response.} Nh5 $6 {unfortunately this is one of the worse options.} (15... h5 {is the most obvious reaction.} 16. g4 hxg4 17. hxg4 fxg4 18. fxg4 Nxg4 $11 {and the knight is pinned against the Rg8, but White cannot exploit this.}) (15... Qc6 {is more subtle.} 16. g4 fxg4 17. fxg4 Rg6 $11) (15... b5 $5 $11 {starts immediate counterplay, with ...b4 as a viable pawn sacrifice to open up lines for Black's pieces (the c-file and the e8-a3 diagonal).}) 16. g4 $14 Bh4+ $6 {this was played with no calculation of White's response, on the assumption that a check is always good.} (16... f6 {is awkward, but defends well enough.} 17. Bh2 Ng7 $14) 17. Ke2 f6 $2 (17... Ng7 $14 {is still possible, if a bit worse than before.}) 18. gxh5 Rxg1 19. Rxg1 $16 fxe5 20. dxe5 $16 {now White is a pawn up and I have no compensation, in fact White is also positionally better with the rook occupying the g-file.} Kf7 {I thought for a while here. This is the only move that keeps Black in the game, as the king helps control the g-file.} 21. f4 Rg8 22. Rxg8 {the best option, as the g-file cannot be kept under control.} Kxg8 23. Nf3 Bd8 $2 {I thought about retreating to both d8 and e7 and did not find much to choose between them, so picked what I thought was more flexible. However, White can now take advantage of this with her next move.} (23... Be7 24. h6 Bf8 $16) 24. h6 $18 Kf7 {staying in the corner seemed like a bad idea.} 25. Qa3 $2 {time pressure was starting to take its toll here. Incredibly, Black can now equalize with the active} Qb5+ $1 26. Kf2 Bb6+ $11 {White's extra doubled h-pawn is meaningless now, with Black's better piece activity.} 27. Nd4 Bc5 (27... Bxd4+ {immediately would have been a simpler way to draw, preventing any future N+Q combinations.} 28. cxd4 Qc4 $11) 28. b4 {unexpected, but it encourages me to play the good move} Bxd4+ 29. cxd4 Qc4 30. Qb2 $2 {here begins the queen ending comedy of errors, as highlighted by the engine.} b5 $6 {unambitiously (and uninspiredly) played to secure the draw, which it should have done.} (30... Qd3 $19 {and White has too many weaknesses, with the king and queen split too far from each other to cooperate; this makes them vulnerable to a skewer tactic from Black's queen. The immediate threat is to the h3 pawn, while the d4 pawn still needs to be guarded as well.}) 31. Qd2 a6 32. Kg2 Qc8 {this still draws, but the restriction of the queen's scope is not a good way to play.} (32... Kg6 $11 {keeps the Black queen threatening White's back ranks.}) 33. Qe2 Qg8+ 34. Kh2 Qg6 35. Qc2 Qxh6 36. Qc7+ Kg8 37. Qc8+ Kf7 {while this is all very annoying, White does not have a way to make progress.} 38. Qc1 Qf8 39. a3 Qe7 40. Kg3 h5 {this still draws, but again there are simpler ways.} (40... Kg6 $11) (40... Kg7 $11) 41. Qd1 h4+ 42. Kf2 Kg6 43. Qg1+ Kh6 $6 {unfortunately I miss how annoying White's next move can be.} (43... Kh7) 44. Qg8 Kh5 $6 (44... Qg7 $1 {and the K+P ending is still drawn, thanks to the closed pawn structure.} 45. Qxe6+ Qg6 46. Qxg6+ Kxg6 $11) 45. Ke2 Kh6 46. Kd2 Kh5 (46... Qd7 {is possible, as} 47. Qg5+ Kh7 48. Qxh4+ Kg7 $11 {and White's queen alone cannot make progress with the h-pawn.}) 47. Qh8+ Kg6 48. Qc8 a5 $2 {played in desperation under time pressure, as I thought White's queen would just keep scooping up pawns otherwise.} (48... Kh6 49. Qxa6 Qe8 $11 {holds, for example after} 50. a4 Qg6 {and again going after White's vulnerable king is the solution.}) 49. bxa5 $18 Kf7 {protecting the e-pawn.} 50. Qc5 Qb7 51. Qb6 Qe7 52. Qxb5 Qxa3 {of course I am still losing, but now have a practical chance of doing something active with my queen...eventually.} 53. Qd7+ Kg8 54. Qxe6+ Kh8 55. Qh6+ Kg8 56. Qg5+ Kh8 57. Qxh4+ Kg8 58. Qd8+ Kh7 59. Qc7+ Kh8 60. Qc3 Qa2+ 61. Kc1 Qf2 62. Qd2 {now it's my turn to be annoying.} Qf1+ 63. Kb2 Qb5+ 64. Ka3 Qb1 65. Ka4 Qa1+ 66. Kb5 Qf1+ 67. Kb6 Qb1+ 68. Ka6 Qb8 69. Qc3 Qa8+ 70. Kb5 Qb7+ 71. Ka4 Qd7+ 72. Ka3 Qb5 73. Qc8+ {here we go again.} Kg7 74. Qc7+ Kg8 75. Qd8+ Kg7 76. Qe7+ Kg8 77. Qe6+ Kg7 78. Qf6+ Kg8 79. Qxf5 Qxa5+ {my turn again.} 80. Kb2 $6 Qb5+ $6 (80... Qd2+ {would keep more of an open field between the Black queen and White king.} 81. Kb3 Qxd4 82. Qc8+ $18) 81. Kc1 Qc4+ 82. Kd1 Qxd4+ 83. Ke1 $2 {now I knew I could draw.} (83. Ke2 $18 {and the king can head for g4, while the e-pawn threatens to advance.}) 83... Qe3+ $1 $11 84. Kd1 Qd4+ $2 (84... d4 $1) 85. Kc2 $6 {going the wrong way.} (85. Ke2 $1 $18) 85... Qc4+ $2 {the problem is that the king could still head back to the kingside and run away from here.} (85... Qe3 $11 {gives up the checking crown to White, but permanently cuts off the White king from shelter.}) 86. Kb2 Qb4+ $2 {same problem as before, if the king runs back towards f3/g4, but neither I nor my opponent realize this, and a draw is agreed with my opponent coming near to flagging.} (86... Qe2+ $11) (86... Qd4+ $11) 1/2-1/2