How to Play the Scandinavian Defense: Blackburne-Kloosterboer Gambit with Nf3

The Blackburne-Kloosterboer Gambit revolves around Black's willingness to let White build a broad pawn centre — only to target it immediately. After 3...cxd5, White's most principled response is 4.d4, seizing space with two central pawns. This is also the engine's first choice: Stockfish rates the position at +0.27 (a small plus for White). Black is slightly worse by the engine's measure, but far from passive. Easy development, no lasting weaknesses, and the half-open c-file all give Black plenty to work with. The real story is psychological: Black plays for activity, while White must be precise or risk handing over equality or more.

When White plays the best move 4.d4 (seen in nearly 13 million games in the database), the engine's recommended continuation runs 4...Nc6 5.c4 Nf6. Notice what's happening: you immediately attack the d4-pawn with your knight, and when White tries to reinforce it with c4, you bring out your kingside knight to pressure the centre from the other side. This is a classic counter-attacking setup. You are not just defending — you are asking White to handle an energetic position. White's c4-pawn can become a target later, and your pieces develop naturally to active squares.

Over 18.7 million games reaching this exact position, White wins 45.9%, draws occur just 4.4%, and Black wins 49.7%. Yes — you read that correctly. Despite Stockfish giving White a +0.27 edge (a small plus for White), Black actually outscores White in practice. This is one of those openings where the engine's assessment and the practical results diverge. The draw rate is also strikingly low, meaning this position tends to produce decisive, fighting games. If you enjoy sharp play with winning chances as Black, this gambit is an excellent choice.

Two of White's common alternatives are rated as inaccuracies. First, if White plays 4.c4 immediately (without first playing d4), it is an inaccuracy that loses roughly 0.7 pawns of advantage — White should have played 4.d4 instead. This move appears in nearly 400,000 games and actually gives White its highest scoring percentage (49.4%) among the alternatives, but the engine still frowns upon it. Second, 4.d3 is also an inaccuracy, costing about 0.6 pawns. Here White scores just 42.6% — terrible for the first player. When you see either move, you can be confident you have already outplayed your opponent in the opening. Develop naturally with ...Nc6 and ...Nf6, and enjoy the extra space or tempo.