C42
Petrov Defense: Quick Escape
1. e4 e5 2. Nf3 Nf6 3. Nxe5 Nxe4 4. d3 Nf6 Opening moves: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 Nxe4 4. d3 Nf6. This position is classified under ECO code C42.
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