A51

Bonsdorf Variation, Budapest

1. d4 Nf6 2. c4 e5 3. dxe5 Ne4 4. a3 b6

Opening moves: 1. d4 Nf6 2. c4 e5 3. dxe5 Ne4 4. a3 b6. This position is classified under ECO code A51.

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About This Opening

ECO Code

A51

Category Volume A

Opening Family

Budapest Gambit

Position (FEN)

rnbqkb1r/p1pp1ppp/1p6/4P3/2P1n3/P7/1P2PPPP/RNBQKBNR w KQkq - 0 5

Lichess Stats

Across 20 rapid and classical games on Lichess (1600+ rated), White wins 35%, Black wins 60%, and 5% end in a draw from this position. The most common continuation is Nf3, played in 30% of games, followed by Qd5 and Nd2.

Observation period: 2026-07.

Small sample: 20 games. These percentages are descriptive and are too uncertain to compare opening strength.

35%

60%

White wins 35% Draws 5% Black wins 60%

20 rapid and classical games on Lichess (1600+)

Top Continuations

Nf3

Qd5

Nd2

Actions

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