411 REFERENCE · Wikibooks
Chess Opening Theory/1. e4/1...c6/2. d4/2...d5/3. exd5/3...cxd5/4. c4
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Caro-Kann Panov-Botvinnik Attack rd nd bd qd kd bd nd rd pd pd pd pd pd pd pd pl pl pl pl pl pl pl rl nl bl ql kl bl nl rl 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Caro-Kann B13-B14
4. c4 · Caro-Kann Panov-Botvinnik Attack
4... Nf6 is almost always played, although 4... e6, previously regarded as having a very poor record, as well as 4... g6, among others, appear to be playable for Black.
Theory table
4... Nf6 4... e6 4... g6 4... Nc6 4... dxc4
Panov-Botvinnik Attack
References