Caro-Kann Defense: Exchange Variation, Bulla Attack
1. e4 c6 2. d4 d5 3. exd5 cxd5 4. g4
The Caro-Kann Defense: Exchange Variation, Bulla Attack is a chess opening classified as ECO B13, reached after 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. g4. It is a line of the Caro-Kann Defense. Black is to move.
This exact move order didn't appear in our sample of 12.6 million Lichess games: it's a rare line.
Engine evaluation: −0.48 (Stockfish, depth 36; best line 4… h5 5. g5 Bg4 6. Be2 Nc6 7. Bxg4)
- ECO
- B13
- Moves
- 7 plies
- FEN
rnbqkbnr/pp2pppp/8/3p4/3P2P1/8/PPP2P1P/RNBQKBNR b KQkq - 0 4- PGN
1. e4 c6 2. d4 d5 3. exd5 cxd5 4. g4
Analyse with Stockfish · Board image (SVG) · Open on Lichess
Comes from
Caro-Kann Defense: Exchange Variation (3. exd5 cxd5) 1. e4 c6 2. d4 d5 3. exd5 cxd5
More Caro-Kann Defense lines (all)
- Caro-Kann Defense (1. e4 c6) B10
- Caro-Kann Defense (1… c6 2. Nc3) B10
- Caro-Kann Defense (2. Nc3 d5) B10
- Caro-Kann Defense: Accelerated Panov Attack (1… c6 2. c4) B10
- Caro-Kann Defense: Accelerated Panov Attack (2. c4 d5) B10
- Caro-Kann Defense: Accelerated Panov Attack, Modern Variation B10
- Caro-Kann Defense: Accelerated Panov Attack, Open Variation B10
- Caro-Kann Defense: Accelerated Panov Attack, Pseudo-Scandinavian B10
- Caro-Kann Defense: Accelerated Panov Attack, Van Weersel Attack B10
- Caro-Kann Defense: Apocalypse Attack B10
- Caro-Kann Defense: Breyer Variation B10
- Caro-Kann Defense: Breyer Variation, Stein Attack B10
Opening names and moves from the Lichess openings dataset; statistics from the Lichess open database, 2026-09 (CC0), sample of 12.6 million games, bots excluded; evaluations from Lichess cloud analysis (all CC0). Master games from The Week in Chess #920–#1664 by Mark Crowther, used with permission.