Blackmar-Diemer Gambit: what should White play?

In the Blackmar-Diemer Gambit (ECO D00), White's standard and most effective continuation is Nc3, which develops a minor piece while putting immediate pressure on Black's advanced pawn on e4. Although computer engines evaluate the position at -0.63 in Black's favor, White retains active piece play and rapid development prospects. Choosing Nc3 remains the overwhelming consensus in practice, featuring in 65.6% of recorded games (185K recorded).

Strategic concepts behind Nc3

By developing the knight with Nc3, White follows classic gambit principles, refusing to spend time recapturing with heavy pieces and instead focusing on rapid mobilization. The knight attacks e4 directly and prepares to support White's upcoming pawn break. The primary engine continuation demonstrates this dynamic plan: Nc3 Nf6 f3 exf3 Nxf3 g6. In this variation, White offers the f3 pawn to open lines for the remaining pieces, accepting a slight material deficit to secure fluid piece development and control over central squares.

Alternative moves for White

White occasionally tests other setups, though they score lower according to engine assessments. The second engine preference is Ne2 (evaluated at -0.80), with the illustrative path Ne2 Nf6 Ng3 Nc6 Be3 g6, steering the knight toward g3 to pressure e4. The solid Be3 appears in 1.4% of games (4.0K recorded) and holds an evaluation of -0.90, leading into Be3 Nf6 Ne2 Bf5 h3 h5. Direct pawn challenges like f3 (-0.92) or c3 (-1.01) yield lower evaluations, while piece outings such as Bc4 (3.6% of games, 10K recorded), Bb5+ (0.8% of games, 2.3K recorded), and Bf4 (0.6% of games, 1.8K recorded) remain rare sidelines compared to the primary line with Nc3.