Caro-Kann Defense: Rasa-Studier Gambit
1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. f3
The Caro-Kann Defense: Rasa-Studier Gambit is a chess opening classified as ECO B15, reached after 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. f3. It is a line of the Caro-Kann Defense. Black is to move.
In 12.6 million rated Lichess games (blitz and slower), this position was reached 2,192 times by this move order. White won 54%, 3% were drawn and Black won 43%. The most popular continuation is 4… exf3 (57% of games).
Engine evaluation: −0.58 (Stockfish, depth 41; best line 4… exf3 5. Nxf3 Nf6 6. Bd3 Bg4 7. Be3)
- ECO
- B15
- Moves
- 7 plies
- FEN
rnbqkbnr/pp2pppp/2p5/8/3Pp3/2N2P2/PPP3PP/R1BQKBNR b KQkq - 0 4- PGN
1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. f3
Analyse with Stockfish · Board image (SVG) · Open on Lichess
Results by rating
| Average rating | Games | White / draw / Black |
|---|---|---|
| 0-1499 | 318 | |
| 1500-1999 | 1,334 | |
| 2000+ | 540 | |
| All | 2,192 |
Most played moves
| Move | Games | White / draw / Black |
|---|---|---|
| 4… exf3 | 1,253 (57%) | |
| 4… Nf6 | 525 (24%) | |
| 4… e3 | 135 (6%) | |
| 4… Bf5 | 103 (5%) | |
| 4… e5 | 78 (4%) | |
| 4… Nd7 | 44 (2%) | |
| 4… e6 | 11 (1%) | |
| 4… g6 | 11 (1%) |
Master games
164 over-the-board games are classified under this line (White 35%, draw 13%, Black 52%). The strongest:
- GM Gareev, T. (2617) – GM Aleksandr Shimanov (2642) 1/2-1/2 · 3rd Chinggis Invitational · 2017-02-25
- GM Gareev, T. (2617) – IM Guillermo Vazquez (2437) 0-1 · PRO League Pacific 2017 · 2017-01-11
- IM Ali Mortazavi (2333) – GM Jeffery Xiong (2700) 0-1 · Titled Tuesday 21st Sept · 2021-09-21
- Esteban Horacio Deichmann (2085) – GM Magnus Carlsen (2837) 0-1 · Titled Tue 6th May Late · 2025-05-06
- IM Ali Mortazavi (2333) – GM Azer Mirzoev (2436) 0-1 · Titled Tuesday 10th Aug · 2021-08-10
Search all games of the Caro-Kann Defense: Rasa-Studier Gambit and its sub-variations
Highest-rated Lichess games
- CM Benek77 (2559) – Your_Waterloo (2704) 1/2-1/2 · 2026-09-02 · 180 + 0s
- CM Benek77 (2560) – IsacApawn (2508) 1-0 · 2026-09-02 · 180 + 0s
- Chu-do (2534) – ArashNGM21 (2521) 1-0 · 2026-09-06 · 180 + 0s
Comes from
Caro-Kann Defense (3. Nc3 dxe4) 1. e4 c6 2. d4 d5 3. Nc3 dxe4
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.