Scandinavian Defense: Main Line, Mieses Variation: what should White play?

In the Scandinavian Defense: Main Line, Mieses Variation (ECO B01), White's top engine recommendation is Nf3, which develops the kingside knight, defends the central d4 pawn, and prepares early castling. Holding an engine evaluation of +0.62, the move is selected in 43.9% of the 4,702,848 recorded games in this position, yielding a 49.3% score for White.

Developing with Nf3

The move Nf3 focuses on natural piece coordination and central influence. Rather than immediately harassing the black queen on a5, White strengthens the center and prepares harmonious development for the light-squared bishop. An illustrative continuation demonstrating this plan is Nf3 Bf5 Ne5 c6 Bc4 e6, where White's minor pieces establish active outposts on central squares.

Popular Alternatives: Bd2 and Bc4

White also frequently selects Bd2, the most common choice in the database, appearing in 44.8% of recorded games (2.11M recorded) with an evaluation of +0.44 and a 49.0% score. The illustrative line Bd2 Bg4 f3 Bd7 f4 Qb6 illustrates Black repositioning pieces in response to White's kingside pawn pushes. Another active try is Bc4, played in 10.3% of encounters (484K recorded) with an evaluation of +0.46 and a 49.4% score, featured in the continuation Bc4 Bg4 Ne2 Nc6 Bd2 O-O-O.

Quieter Continuations

Less frequent options include Be2 and the subtle pawn advance a3. Played in 0.5% of games, Be2 yields an evaluation of +0.31 and a 49.6% score, as seen in Be2 Bf5 Nf3 c6 Bf4 e6. Meanwhile, a3 is found in 0.4% of games, scoring 49.5% with a +0.44 evaluation through the illustrative sequence a3 Bf5 b4 Qb6 Nf3 c6. Both choices preserve a stable position while developing White's forces.