411 REFERENCE · Wikibooks
Chess Opening Theory/1. e4/1...c6/2. Nc3/2...d5/3. Nf3/3...Nf6/4. e5/4...Ne4/5. d4/5...Nxc3
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Caro-Kann Defence: Two Knights Attack B10
5...Nxc3 · Caro-Kann Defence: Two Knights Attack
White has no option but to capture back.
Theory table
6. bxc3
Caro-Kann