Réti Opening: Anglo-Slav Variation, London Defensive System (4… Bf5 5. Bg2)
1. c4 Nf6 2. g3 c6 3. Nf3 d5 4. b3 Bf5 5. Bg2
The Réti Opening: Anglo-Slav Variation, London Defensive System is a chess opening classified as ECO A12, reached after 1. c4 Nf6 2. g3 c6 3. Nf3 d5 4. b3 Bf5 5. Bg2. It is a line of the Réti Opening. Black is to move. 1 named line continues from this position.
In 12.6 million rated Lichess games (blitz and slower), this position was reached 1 times by this move order. White won 100%, 0% were drawn and Black won 0%. The most popular continuation is 5… e6 (100% of games).
Engine evaluation: 0.00 (Stockfish, depth 38; best line 5… e6 6. O-O h6 7. Nc3 Be7 8. d4)
- ECO
- A12
- Moves
- 9 plies
- FEN
rn1qkb1r/pp2pppp/2p2n2/3p1b2/2P5/1P3NP1/P2PPPBP/RNBQK2R b KQkq - 2 5- PGN
1. c4 Nf6 2. g3 c6 3. Nf3 d5 4. b3 Bf5 5. Bg2
Analyse with Stockfish · Board image (SVG) · Open on Lichess
Results by rating
| Average rating | Games | White / draw / Black |
|---|---|---|
| 1500-1999 | 1 | |
| All | 1 |
Most played moves
| Move | Games | White / draw / Black |
|---|---|---|
| 5… e6 | 1 (100%) |
Master games
14 over-the-board games are classified under this line (White 36%, draw 28%, Black 36%). The strongest:
- GM Eduardo Iturrizaga Bonelli (2637) – IM Nicolas Checa (2508) 0-1 · PRO League Group Stage · 2019-03-12
- GM Jun Zhao (2536) – GM Jinshi Bai (2604) 1/2-1/2 · CHN Team Men 2026 · 2026-04-20
- GM Eduardo Iturrizaga Bonelli (2639) – FM Hoang Canh Huan (2394) 1-0 · 9th HD Bank Cup 2019 · 2019-03-08
- FM Dmitry Kononenko (2322) – FM Armen Ar. Barseghyan (2358) 1/2-1/2 · Chelyabinskiy Variant GpA · 2021-03-24
- Wellington S. Albuquerque Junior (2209) – IM Michel Alejandro Diaz Perez (2459) 0-1 · Titled Tuesday 17th Nov · 2020-11-17
Highest-rated Lichess games
- ChessPlayer55555555 (1983) – ceslavs2 (1793) 1-0 · 2026-09-06 · 720 + 5s
Comes from
Réti Opening: Anglo-Slav Variation, London Defensive System (4. b3 Bf5) 1. c4 Nf6 2. g3 c6 3. Nf3 d5 4. b3 Bf5
Continuations
- Réti Opening: Anglo-Slav Variation, London Defensive System (5… e6 6. Bb2) A12 · 1. c4 Nf6 2. g3 c6 3. Nf3 d5 4. b3 Bf5 5. Bg2 e6 6. Bb2
More Réti Opening lines (all)
- Réti Opening A09
- Réti Opening: Advance Variation A09
- Réti Opening: Advance Variation, Michel Gambit A09
- Réti Opening: Advance Variation, Navara Gambit A09
- Réti Opening: Penguin Variation A09
- Réti Opening: Reversed Blumenfeld Gambit A09
- Réti Opening: Réti Accepted A09
- Réti Opening: Réti Gambit, Keres Variation A09
- Réti Opening: Zilbermints Gambit A09
- Réti Opening: Anglo-Slav Variation, Gurevich System (2… d5 3. e3) A11
- Réti Opening: Anglo-Slav Variation, Gurevich System (3… Nf6 4. Qc2) A11
- Réti Opening: Anglo-Slav Variation, Gurevich System (4… Nbd7 5. Qc2) A11
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.