Rat Defense: Fuller Gambit
1. e4 d6 2. f4 d5 3. exd5 Nf6
The Rat Defense: Fuller Gambit is a chess opening classified as ECO B00, reached after 1. e4 d6 2. f4 d5 3. exd5 Nf6. It is a line of the Rat Defense. White is to move.
In 12.6 million rated Lichess games (blitz and slower), this position was reached 5 times by this move order. White won 60%, 0% were drawn and Black won 40%. The most popular continuation is 4. c4 (80% of games).
Engine evaluation: +0.44 (Stockfish, depth 34; best line 4. d4 e6 5. Bb5+ c6 6. dxc6 bxc6)
- ECO
- B00
- Moves
- 6 plies
- FEN
rnbqkb1r/ppp1pppp/5n2/3P4/5P2/8/PPPP2PP/RNBQKBNR w KQkq - 1 4- PGN
1. e4 d6 2. f4 d5 3. exd5 Nf6
Analyse with Stockfish · Board image (SVG) · Open on Lichess
Results by rating
| Average rating | Games | White / draw / Black |
|---|---|---|
| 1500-1999 | 3 | |
| 2000+ | 2 | |
| All | 5 |
Most played moves
| Move | Games | White / draw / Black |
|---|---|---|
| 4. c4 | 4 (80%) | |
| 4. d6 | 1 (20%) |
Master games
18 over-the-board games are classified under this line (White 33%, draw 34%, Black 33%). The strongest:
- GM Vasyl Ivanchuk (2728) – GM Emre Can (2571) 1/2-1/2 · TCh-TUR Super League 2016 · 2016-07-28
- GM Hrvoje Stevic (2611) – GM Milos Perunovic (2613) 1/2-1/2 · 19th European Teams · 2013-11-12
- GM Alexander Cherniaev (2447) – GM Aleksei Pridorozhni (2512) 1/2-1/2 · FIDE World Blitz 2013 · 2013-06-10
- IM Nikolai Vlassov (2291) – GM Anton Demchenko (2619) 0-1 · Titled Tue 6th May Late · 2025-05-06
- IM Nikolai Vlassov (2299) – GM Denis Kadric (2584) 1-0 · Titled Tue 9th Jan Early · 2024-01-09
Search all games of the Rat Defense: Fuller Gambit and its sub-variations
Highest-rated Lichess games
- Zopa123456 (2175) – chaunax (2180) 0-1 · 2026-09-06 · 300 + 3s
- Alexandr_Mar (1946) – Guernio (2081) 0-1 · 2026-09-06 · 180 + 0s
- Said_Rantau (1934) – amangalamang (1986) 1-0 · 2026-09-07 · 600 + 0s
Comes from
Rat Defense: Harmonist 1. e4 d6 2. f4
More Rat Defense lines (all)
- Rat Defense: English Rat A41
- Rat Defense: English Rat, Lisbon Gambit A41
- Rat Defense: English Rat, Pounds Gambit A41
- Rat Defense: Balogh Defense A82
- Rat Defense: Antal Defense B00
- Rat Defense: Petruccioli Attack B00
- Rat Defense: Spike Attack B00
- Rat Defense: Accelerated Gurgenidze B06
- Rat Defense: Small Center Defense C00
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.