The Caro-Kann Defense has been extensively analyzed, and various lines have been developed. Some of the main theoretical backgrounds include:
White trades off Black's active bishop, but Black achieves a highly resilient position. Black will follow up with ...e6, ...Ngf6, and eventually look for c6-c5 to break open the center. 2. The Advance Variation (1.e4 c6 2.d4 d5 3.e5) the carokann move by move pdf verified