411 REFERENCE · Wikibooks
Chess Opening Theory/1. e4/1...c6/2. d4/2...d5/3. f3/3...dxe4/4. fxe4
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Caro–Kann Defence: Fantasy Variation Tartakower VariationMaróczy Variation
4. fxe4 · Fantasy Variation
Black has only one acceptable response here; 4...e5. Anything else gives White serious initiative.
Theory table
4...e5
References