411 REFERENCE · Wikibooks
Chess Opening Theory/1. e4/1...c6/2. d4/2...d5/3. Nc3/3...dxe4/4. Nxe4/4...f6
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f6 Caro-Kann Defence rd nd bd qd kd bd nd rd pd pd pd pd pd pd pd pl nl pl pl pl pl pl pl rl bl ql kl bl nl rl
Caro-Kann f6
This has been tried quite a few times, but chances of success are low.
Epilogue
The f6 Caro-Kann is a rare line that weakens the kingside and hinders the development of the king's knight, but prepares an e5 push.