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 variation within the Flank Openings family, indexed as ECO A14.

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

The line arises from 10 plies — specifically the moves 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. b3 c5.

It is a variation of English Opening: Agincourt Defense, Neo-Catalan Declined, Early b3, which itself descends from the root opening English Opening.

Step through the moves on the interactive board below, review the live Lichess statistics, or play this position against Stockfish at one of six difficulty levels.

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

3,711 games · White 49.8% / Draw 6.5% / Black 43.7%

MovesGamesW / D / B
O-O1,668
Bb2979
cxd5485
e3409
d373
d470
Nc315
Ne54

Source: Lichess Opening Explorer · cached 2026-09-26 00:43:04

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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-b3-3