French Defense · if they play 3.exd5
C01 · French Defense: Exchange Variation · you play Black
This is the branch for when your opponent leaves the French Defense main line with 3.exd5.
The idea
The Exchange is symmetrical: copy the development, castle, and your bishops are as good as White's.
The moves
1. e4 e6 2. d4 d5 3. exd5 exd5 4. Bd3 Bd6 5. Nf3 Nf6 6. O-O O-O
Free, no sign-up. The board plays the other side and you play every one of your moves. A line you miss comes back tomorrow; one you get comes back after 3 days, then a week, then three weeks.
Opening names from the Lichess chess-openings list (CC0). Every line was checked move by move by the rules engine. Part of Chess Path, a free chess course.