Chess Codex
Tree path 8 levels English Opening › Agincourt Defense › English Opening: Agincourt Defense › English Opening: Agincourt Defense › English Opening: Neo-Catalan › English Opening: Neo-Catalan Declined › English Opening: Agincourt Defense, Neo-Catalan Declined, Early b3 › English Opening: Agincourt Defense, Neo-Catalan Declined, Early b3
  1. Chess Codex
  2. English Opening A10
  3. Agincourt Defense A13
  4. English Opening: Agincourt Defense A13
  5. English Opening: Agincourt Defense A13
  6. English Opening: Neo-Catalan A13
  7. English Opening: Neo-Catalan Declined A13
  8. English Opening: Agincourt Defense, Neo-Catalan Declined, Early b3 A14
  9. English Opening: Agincourt Defense, Neo-Catalan Declined, Early b3 A14 you are here
A14

English Opening: Agincourt Defense, Neo-Catalan Declined, Early b3

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Overview

English Opening: Agincourt Defense, Neo-Catalan Declined, Early b3 is a specific line in the Flank Openings family (ECO A14), arising from a recognised theoretical position.

The Flank Openings group covers flank openings — systems that delay the central pawn break and instead develop pieces and pawns on the wings.

It is reached after 10 plies of play, with the move sequence 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. b3 b6.

The line refines English Opening: Agincourt Defense, Neo-Catalan Declined, Early b3, which traces back to the root opening English Opening.

Explore the position on the interactive board, study its real-world results from Lichess, and challenge the engine when you are ready.

ECO code
A14
Group
Flank Openings (A)
Plies
10
Parent
English Opening: Agincourt Defense, Neo-Catalan Declined, Early b3

This overview is generated automatically from the opening's metadata. Know this line well? Write a description — submissions are reviewed before publishing.

Statistics from Lichess

1,320 games · White 46.6% / Draw 8.9% / Black 44.5%

MovesGamesW / D / B
O-O670
Bb2536
cxd573
d310
d49
Nc38
Ne55
Ba34

Source: Lichess Opening Explorer · cached 2026-09-26 00:43:01

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Related variations at the same level

Sister lines that share the same parent English Opening: Agincourt Defense, Neo-Catalan Declined, Early b3:

https://chesscodex.org/openings/english-opening-agincourt-defense-neo-catalan-declined-early-b3-2