411 REFERENCE · Wikibooks
Chess Opening Theory/1. d4/1...d5/2. c4/2...c6/3. Nf3/3...Nf6/4. Nc3/4...dxc4/5. a4/5...Bf5/6. Ne5/6...Nbd7/7. Nxc4/7...Qc7/8. g3/8...e5/9. dxe5/9...Nxe5/10. Bf4/10...Nfd7/11. Bg2/11...f6
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Carlsbad variation D17 Carlsbad variation
11...f6
This is the old mainline. Black protects the knight with a pawn in order to protect the knight.
The usual continuation after f6 is 12. O-O Nc5 13. Ne3 Bg6 14. b4.
Theory table
12. O-O Nc5 13. Ne3 Bg6 14. b4 +
References
See also