ECO A12 · Réti Opening

Réti Opening: Anglo-Slav Variation, London Defensive System

1. c4 Nf6 2. g3 c6 3. Nf3 d5 4. b3 Bf5

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White to move. The arrow shows Stockfish’s best move.
Best move

5. Bg2+0.03

The position is roughly equal. Stockfish 18, depth 18.

Analyze this position

In the Réti Opening: Anglo-Slav Variation, London Defensive System (A12), reached after 1. c4 Nf6 2. g3 c6 3. Nf3 d5 4. b3 Bf5, Stockfish 18 recommends 5. Bg2 for White. The position is roughly equal (+0.03).

Top engine moves

  1. +0.035. Bg2 e6 6. Bb2 Be7 7. O-O h6 8. Nc3 O-O 9. d4 Nbd7
  2. −0.015. Bb2 e6 6. Bg2 Be7 7. O-O h6 8. Nc3 O-O 9. d4 Nbd7
  3. −0.135. d3 e6 6. Bb2 h6 7. Bg2 Be7 8. O-O Bh7 9. Nc3 O-O

Other move orders

  • 1. c4 Nf6 2. g3 c6 3. Nf3 d5 4. b3 Bf5 5. Bg2
  • 1. c4 Nf6 2. g3 c6 3. Nf3 d5 4. b3 Bf5 5. Bb2
  • 1. c4 Nf6 2. g3 c6 3. Nf3 d5 4. b3 Bf5 5. Bg2 e6 6. Bb2

Frequently asked questions

What is the best move in the Réti Opening: Anglo-Slav Variation, London Defensive System?
After 1. c4 Nf6 2. g3 c6 3. Nf3 d5 4. b3 Bf5, Stockfish 18 at depth 18 recommends 5. Bg2 for White, continuing e6 6. Bb2 Be7 7. O-O h6 8. Nc3 O-O 9. d4 Nbd7. The position is roughly equal (+0.03). The next best moves are 5. Bb2 (−0.01) and 5. d3 (−0.13).
Is the Réti Opening: Anglo-Slav Variation, London Defensive System a good opening?
Stockfish rates the position at +0.03: the position is roughly equal. Evaluations this early in the game are small, so practical results depend far more on knowing the plans and typical structures than on the engine's number.
What is the ECO code of the Réti Opening: Anglo-Slav Variation, London Defensive System?
A12. ECO codes classify chess openings from A00 to E99; A is the volume for flank openings.

Opening names from the Lichess opening book (CC0). Pieces by Colin M.L. Burnett (GPLv2+).