Annotated Game #367: For want of a (correct) square for the bishop

In this second-round tournament game, as Black in a Caro-Kann Exchange (very popular right now for White players), I enter a line that is (more or less) equal, but imbalancing and dynamic, if White exchanges bishops on f5 and changes the central pawn structure. However, I still have relatively little experience in it - White players often decline to change things up - and my lack of knowledge about a seemingly small thing, where to place the dark-square bishop (on e7 or d6), ends up being at the root of all my troubles. My opponent does a good job of consolidating his structural advantage, after which - like in the previous game (Annotated Game #366) - I lash out with an ineffective sacrifice in a desperate attempt for counterplay. The difference is that in this one I probably was lost in the long term anyway, but it is still not a good habit to get into.

[Event "?"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "Class B"] [Black "ChessAdmin"] [Result "1-0"] [Annotator "ChessAdmin/Dragon 3.2"] [ECO "B13"] [PlyCount "57"] [GameId "2351903693869099"] 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nc6 5. c3 Nf6 6. Bf4 g6 7. Nd2 Bf5 {I thought for a while here, also considering ...Nh5 to hit the Bf4.} 8. Bxf5 {White decides to go for the critical line.} gxf5 9. Ngf3 e6 {a necessary move to open the f8-a3 diagonal and reinforce the f5 and d5 pawns.} 10. Ne5 Rg8 {my first real think. I liked the idea of an early ...Rg8 to seize the file, then see what White did.} (10... Bd6 {is the more popular - and correct - move, developing the bishop first.}) 11. g3 {my opponent decides to shut down potential g-file action before doing anything else.} Be7 $6 {misplacing the bishop. It is much better to oppose the Bf4 and fight for the center, along with ...Qc7 forming a battery.} 12. Qe2 $14 {my opponent clearly signals he is thinking about castling queenside.} a6 $6 {played after a significant think; I was worried about Qb5 ideas from White, and did not want to trade on e5 yet.} (12... Nxe5 13. dxe5 Nd7 14. O-O-O Qb6 $14) 13. O-O-O {unsurprising, but I had another significant think here to try and come up with a useful plan. I ended up playing the next move to protect the Nc6, in anticipation of pushing the b-pawn, and to get some pressure down the c-file.} Rc8 {this is unfortunately more of a cheap one-move threat (...Nxd4 exploiting the pin on the c-file). With the White king on the queenside, the rook is also well-placed on its original square.} (13... Qb6 {with the plan of pushing the a-pawn is preferred by the engine.}) 14. Kb1 $16 {a normal move to get the king off the file with the Black rook, also avoiding the tactic of ...Nxd4.} b5 $6 {the engine assesses this is not a threat to White. The problem is that I have no effective plans to execute, with none of my pieces in good positions.} 15. Rhe1 {now I have to worry about Nxf7 ideas because of the weak e6 pawn, so after some thought I reluctantly exchange on e5, a decision validated by the engine.} Nxe5 16. dxe5 Nd7 {White's space and activity advantage is visually obvious, especially with the e5 pawn cramping me in the center.} 17. Qh5 Nf8 {at this point I am being purely defensive, but I didn't see how White could break through on the kingside.} 18. Nb3 b4 $6 {played after my longest think in this critical position. I felt I had to go for counterplay on the queenside, rather than accept a structurally worse, maybe losing position.} (18... Bg5 {is the (objectively better) alternative I considered.} 19. Bxg5 Qxg5 20. Qe2 $14 (20. Qxg5 $6 Rxg5 $11)) 19. Bd2 {I had not considered this backwards bishop move option for White.} bxc3 {I thought there was nothing better, and was probably right.} (19... Qb6 $5 20. f4 a5 21. cxb4 a4 $18) 20. Bxc3 {now I didn't see a way to make progress, so decided to go for a speculative exchange sac, as the most interesting move.} Rxc3 $6 21. bxc3 Rg4 {attempting to at least cut off the White queen from the action.} 22. Rd4 $18 {I was expecting f2-f4, but this is just as good for White.} Rxd4 23. cxd4 {with no material compensation for the exchange and a still slow-developing attack, I am simply lost now, but decided to keep fighting.} Qb6 (23... Ba3 24. Qe2 Qb6 25. Ka1 $18) 24. Rc1 Qb7 {I decided covering the c8 square was necessary to prevent immediate disaster from a rook check.} (24... a5 25. Rc8+ Bd8 26. Qg5 a4 27. Rxd8+ Qxd8 28. Qxd8+ Kxd8 29. Nc5 $18 {I calculated as a winning endgame for White.}) 25. Ka1 Ba3 26. Rc2 Nd7 {a last hurrah trying to get the knight into the action.} 27. Na5 Qb8 28. Qe2 Qb4 {I was trying for a desperation threat and missed the following, but I was lost anyway.} 29. Rc8+ {with mate to follow, thanks to the e5 pawn and Nc6+ coming.} 1-0