Scandinavian Defense: Blackburne-Kloosterboer Gambit: what should Black play?

In the Scandinavian Defense: Blackburne-Kloosterboer Gambit, Black achieves fully comfortable equality with the active pin Bg4, which the engine assesses at -0.11 across 925K recorded games. While the natural developing move Nf6 is the most frequent choice in 40.9% of games, Bg4 immediately exerts pressure on White's f3 and restricts White's central ambitions.

Developing the light-squared bishop with Bg4

Developing the bishop to g4 via Bg4 accounts for 22.1% of games in the database and holds White to a 44.1% scoring rate. An illustrative engine continuation demonstrates typical piece trades: Bg4 h3 Bxf3 Qxf3 e6 Bb5+. By capturing the knight on f3, Black willingly yields the bishop pair in exchange for an uncompromised pawn structure and rapid consolidation behind the solid d5 outpost.

The popular alternatives: Nf6 and Nc6

Black also relies heavily on piece development to central files. The move Nf6 appears in 1.71M games with an engine evaluation of -0.02, leading into lines such as Nf6 d4 Bg4 h3 Bxf3 Qxf3, where White scores 44.2%. Meanwhile, Nc6 is chosen in 26.3% of games with a -0.11 evaluation, where White scores 42.9% following Nc6 Bb5 Bg4 h3 Bxf3 Qxf3. Both knight moves frequently transpose into setups resembling the main Bg4 ideas, giving Black multiple reliable paths into the middlegame.

Structural choices: a6 and e6

Quieter setups occur less frequently in practice. The prophylactic a6 is seen in 2.3% of games (evaluation -0.08) and enters a6 d4 Nc6 Ne2 Bf5 c3, holding White to 43.2% scoring. By contrast, the immediate e6 is chosen in 8.2% of games with an evaluation of +0.13, where White records a higher score of 47.4% after e6 d4 Nc6 Bf4 Bd6 Bg3.