Caro-Kann Defense: what to play after d5?

In the Caro-Kann Defense, White faces a critical choice at this juncture, with the engine-preferred and most frequent continuation being exd5. This move, played in 62.5% of the 81 million recorded games, leads to the Exchange Variation, offering White a stable position with an engine evaluation of +0.21. By opting for exd5, White simplifies the central tension and prepares for a classical development scheme, typically involving d4 and Bd3.

The Exchange Variation with exd5

The move exd5 is the most popular choice by a significant margin, appearing in 53 million games. It leads to a symmetrical pawn structure where White often aims for a minority attack or central control. The main line continues exd5 cxd5 d4 Nc6 Bb5 e6, where White maintains a slight edge. Despite its popularity, White's win rate from this position is 47.8%, reflecting the solid, drawish nature of the resulting structures.

The Advance and Two Knights Alternatives

White may choose to increase central pressure with e5, the second most common response played in 16.5% of games. This leads to the Advance Variation, where White gains space but allows Black to develop the light-squared bishop outside the pawn chain, often following the line e5 Bg4 Be2 e6 O-O c5. Alternatively, Nc3 is a flexible developing move seen in 11.7% of games, scoring 50.9% for White. This often transposes into the Two Knights Variation if Black responds with Bg4.

Positional Nuances of d3 and Bd3

Less common approaches include d3 and Bd3. The move d3 is a modest choice played in 3.9% of games, yet it boasts the highest win percentage among the top options at 51.9%. It often leads to an endgame-oriented struggle after d3 dxe4 dxe4 Qxd1+ Kxd1 g6. Conversely, Bd3 is a rare sideline (0.7%) that carries a slightly negative engine evaluation of -0.01, as it can allow Black to comfortably develop with Bg4.