I have gotten back into correspondence online to improve my game, and am wondering what the best database is. Lichess is awesome, but I'm wondering about competitors. I find that my opponent and I get into offbeat positions quickly; no one follows the main lines or wants to play the sharper variations.
chessbase, it is most up to date
also the iccf database
the chessbase online database contains most of the correspondence games, but it is mixed with others, so maybe best is just downloading the iccf
See what https://encroissant.org/docs/assets/databases has.
And when you have a login at https://www.iccf.com/ you can download the ICCF Games Archives.
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