Van Geet Opening: Melleby Gambit — A Sharp Repertoire for Black

At first glance, the position after 1.Nc3 d5 2.f4 d4 3.Ne4 c5 looks level — and Stockfish agrees, giving it -0.03, dead even. But humans are not engines, and the practical statistics are striking. In 327 games from this exact position, Black wins 54.4% of the time, while White wins only 42.8% (with a tiny 2.8% draw rate). That is a huge swing for a theoretically equal opening. The reason is simple: many White players mishandle the position right away. The knight on e4 looks actively placed, but it can become a target, and White's f4 pawn weakens the kingside without contributing to central control. If White tries to grab material or lash out too aggressively, you as Black can seize a lasting advantage.

Stockfish's top recommendation for White is 4.Nf3, continuing with Nc6 c3 Nf6. That line develops normally and fights for the centre — nothing flashy, just solid play. In the 74 games where White chose 4.Nf3, White scored 51.4%, which is roughly what you would expect from an equal position. As Black, you should be happy to face this move: it leads to a balanced middlegame where your extra central space (the d4 pawn) gives you comfortable play. The real news is that most White players at club level do not find Nf3. They reach for something more ambitious — and that is exactly where your edge appears.

The FACTS list three moves that Stockfish flags as clear mistakes, and they are the ones you will see most often across the board. Here is what to look for and what the engine recommends against each: - 4.Nxc5 (96 games — the most popular move): This grabs the c5 pawn but leaves the knight exposed. Stockfish calls it an inaccuracy that loses about 0.6 pawns. Black can take advantage with natural development, gaining a lead in activity while White's knight struggles to retreat. - 4.d3 (82 games): Another inaccuracy costing about 0.6 pawns. This passive move does nothing to challenge Black's centre. You can simply continue developing with ...Nc6 and ...e5, building a powerful pawn centre. - 4.Ng3 (9 games): The worst of the bunch, losing roughly 0.9 pawns. The knight retreats to a clumsy square, blocking White's own g-pawn and doing nothing to contest the centre. Black can follow up with ...Nc6, ...e5, and ...Bd6, with a dominant position. White scored an abysmal 30.8% after Nf2 as well — another retreat that cedes the initiative.

The move you are most likely to face is 4.Nxc5, which appears in 96 of the 327 games in the database — nearly a third of all White choices. It is also the move most likely to be played by an opponent who thinks they are winning a free pawn. Your plan is straightforward: do not panic, and do not chase the knight immediately. Develop your pieces with tempo: ...Nc6 attacks the knight and develops, ...Nf6 eyes the centre and threatens ...Nxe4, and ...e5 seizes space. White's knight on c5 has no good retreat squares and will eventually have to move again, losing time. Meanwhile, your development surges ahead. The numbers back this up: White scores only 34.4% after 4.Nxc5 — their worst performance among all the main replies except the rare Nf2.