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...Qxe5/6. Be2/6...Bb4
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Gunderam Gambit Accepted rd nd bd kd rd pd pd pd pd pd pd pd nd qd bd pl nl pl pl pl pl bl pl pl pl rl bl ql kl rl 1. e4 e5 2. Nf3 c6 3. Nxe5 Nf6 4. d3 Qa5+ 5. Nc3 Qxe5 6. Be2 Bb4
King's Knight Opening: Gunderam Gambit, Bishop Attack
6...Bb4
This is very good for black as it pins the knight and threatens to exchange it to ruin white's pawn structure.
White now has:
/7. Bd2/ Unpin Variation
/7. O-O/ Main Line
The Main Line (7. O-O) is better as it unpins the knight and moves the king to safety.