411 REFERENCE · Wikibooks
Chess Opening Theory/1. e4/1...e5/2. Nf3/2...c6/3. Nxe5/3...Nf6/4. d3/4...Qa5/5. Nc3/5...Qxe5
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Gunderam Gambit Accepted rd nd bd kd bd rd pd pd pd pd pd pd pd nd qd pl nl pl pl pl pl pl pl pl rl bl ql kl bl rl 1. e4 e5 2. Nf3 c6 3. Nxe5 Nf6 4. d3 Qa5+ 5. Nc3 Qxe5
This is black's only move that gains an advantage. The most aggressive response is /6. Be2/.