A25

Closed System, Full Symmetry, King's English

1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6

Opening moves: 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6. This position is classified under ECO code A25.

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About This Opening

ECO Code

A25

Category Volume A

Opening Family

English Opening

Position (FEN)

r1bqk1nr/ppp2pbp/2np2p1/4p3/2P5/2NP2P1/PP2PPBP/R1BQK1NR w KQkq - 0 6

Lichess Stats

Across 29 rapid and classical games on Lichess (1600+ rated), White wins 24%, Black wins 62%, and 14% end in a draw from this position. The most common continuation is Nf3, played in 59% of games, followed by e4 and Rb1.

Observation period: 2026-07.

Small sample: 29 games. These percentages are descriptive and are too uncertain to compare opening strength.

24%

14%

62%

White wins 24% Draws 14% Black wins 62%

29 rapid and classical games on Lichess (1600+)

Top Continuations

Nf3

Rb1

Bd2

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