I never came across a correspondence game in my local Mega DB.
My chess tools:
- CB and Hiarcs as DB programs
- Mega DB with weekly CB updates
- Corr DB with monthly ICCF updates
- Hiarcs openings book
- SF and LcO
- Forward Chess
- Chessvision.ai
- Qchess.net
- Lichess
- Chessable

Correspondence players spend days analyzing a position with the strongest engines. You can still find interesting ideas as L’Ami showed in the NIC Yearbooks.
I only look at games post SF-NNUE and use the corr DB to see if there is consensus on the strongest move and any new ideas from top players.

23... Nf6 24. d6?
(24. Rg4+! Nxg4 25. Qxg4+ Kh8 26. Qd4+ f6 27. d6 Bxg3 28. Qd2 Rf7 and wins.)
24... Bxg3
(24... Qc8! with equality.)
25. Rg4+ Nxg4 26. Qxg4+ Kh8 27. Qd4+ f6 28. Qd2 Rf7 29. Bxf7 Kg7 30. Qd3 1-0
Aronian saw the idea but chose the wrong move order but won after all.

The knight came from g6.

33. Bf6! Bxf6 34. Qxf4 and mate is unavoidable.

Second introduction video: variations without Bf5 and Early Deviations
youtu.be/aTL4NKZbVUY

First introduction video: Variations with Bf5.
youtu.be/Xq9obNz4vLc

Congratulations! 🎉
You have proven to belong in this class, which should boost your confidence. 💪
Your focus now should be on converting winning positions, a much better challenge than must-win situations against lower-rated opponents.

After 13... Rxc3 14. Qxc3, White has Kd2 in the end.

Black won after 13... Rxc3 14. Qxc3 Qxa2+ 15. Kc1 Bh6+ 0-1
I discovered the tactical motif 15... Bh6+, forcing a white piece to block the escape square of the white king, when I created my course.

My video on this position and four other examples where active defense and concrete calculation trumps chess principles:
youtu.be/D1XLSEZA58E