Scandinavian Defense: Blackburne-Kloosterboer Gambit (3.c4) — How to Play as Black

By playing 2...c6 and then capturing on d5 with the c-pawn, Black opens the c-file for the rook and grabs a foothold in the centre. Unlike the mainline Scandinavian (2...Qxd5), Black keeps the queen on its original square and waits to see White's setup. The d5-pawn is solid: White's best move is cxd5, continuing 4.cxd5 Nf6 5.Nf3 Nxd5, which leads to a symmetrical-looking centre with both sides developing naturally. Black's plan is simple — develop kingside, castle early, and put pressure on White's centre with pieces, not pawns.

White has several options, and the statistics tell a clear story about which ones you should welcome. The most common move is cxd5 (258,576 games, White scores 52.4%), which is also the engine's top choice — but Black scores a respectable 44.1% from the full position, so there's nothing to fear. d4 (48,495 games, White scores 53.9%) gives White a slightly higher win rate, though the difference is small. What's really interesting is what happens when White avoids the obvious: after c5 (White scores only 44.6%), Nc3 (46.5%), Nf3 (48.3%), or Qa4+ (40.4%), White actually performs worse. These moves are all mistakes or inaccuracies — and if White plays one, you're already doing better than the statistics suggest.

Three of White's possible moves here are classified as subpar. If White plays 4.c5 (a mistake that loses about 1.4 pawns), you should respond with something that challenges White's overextended pawn — the engine suggests 4...d4 as best. If White plays 4.Nc3 (another mistake, losing about 1.5 pawns), again the best reply is 4...d4, kicking the knight. Even 4.Nf3 (an inaccuracy, losing about 0.6 pawns) is not ideal for White. These aren't losing blunders, but they give Black a comfortable edge. The key takeaway: when White doesn't recapture on d5 immediately, you can often seize space in the centre with ...d4 and take the initiative.

When White plays the best move 4.cxd5, the engine suggests: 4.cxd5 Nf6 5.Nf3 Nxd5. This is the most common and principled continuation. Black develops the knight to d5 (centralized and hard to chase away), the f8-bishop will go to e7 or d6 depending on White's next move, and Black castles kingside within a few moves. The position is roughly equal, with both sides having clear development plans. Black's structure is clean — no weak pawns, a semi-open c-file for potential rook activity, and a knight on an outpost in the centre. You're not fighting for equality; you're already there.