411 REFERENCE · Wikibooks
Chess Opening Theory/1. e4/1...c6/2. c4/2...d5/3. exd5/3...cxd5/4. cxd5/4...Nf6
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Caro-Kann Accelerated Panov
4...Nf6 · Caro-Kann Accelerated Panov Attack
4...Nf6 puts another attacker on the d5 pawn.
Here, the main line is 5. Nc3, but White can also play the tricky 5. Bb5+ or 5. Qa4+, which give the unprepared Black player a chance to go wrong quickly.
Theory Table
5. Nc3 5. Bb5+ 5. Qa4+ 5. Nf3 5. d4
Caro-Kann