411 REFERENCE · Wikibooks
Chess Opening Theory/1. e4/1...c6/2. d4/2...d5/3. f3/3...e6/4. Nc3/4...Bb4/5. Ne2
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Caro-Kann Fantasy Variation B12 Caro-Kann → 2...d5
5. Ne2 · Caro-Kann Fantasy Variation
5...Nf6 is playable, but the knight can be more vulnerable to attack on f6, so 5...Ne7 is more commonly-played.
Theory table
5... Ne7 5... dxe4 5... Nf6 5... b6
References
See also
Caro-Kann