C42

Petrov Defense: Double Strike

1. e4 e5 2. Nf3 Nf6 3. Nxe5 Nxe4 4. Bc4 d5 5. Bb3 Qg5 6. O-O Qxe5 7. d3 Nxf2 8. Rxf2 Bc5

Opening moves: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 Nxe4 4. Bc4 d5 5. Bb3 Qg5 6. O-O Qxe5 7. d3 Nxf2 8. Rxf2 Bc5. This position is classified under ECO code C42.

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About This Opening

ECO Code

C42

Category Volume C

Opening Family

Petroff Defense

Position (FEN)

rnb1k2r/ppp2ppp/8/2bpq3/8/1B1P4/PPP2RPP/RNBQ2K1 w kq - 1 9

Lichess Stats

Across 8 rapid and classical games on Lichess (1600+ rated), White wins 25%, Black wins 75%, and 0% end in a draw from this position. The most common continuation is Nc3, played in 50% of games, followed by Qf1 and c3.

Observation period: 2026-07.

Small sample: 8 games. These percentages are descriptive and are too uncertain to compare opening strength.

25%

75%

White wins 25% Draws 0% Black wins 75%

8 rapid and classical games on Lichess (1600+)

Top Continuations

Nc3

Qf1

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