Grob Opening: London Defense

Before the first move

The Grob Opening is a provocative flank attack where White immediately pushes the g-pawn to seize space and challenge your king's side. While it looks aggressive, it leaves behind significant weaknesses. In the London Defense, Black responds by occupying the center and preparing to exploit White's overextended pawns.

1. g4White

White plays g4, the signature move of the Grob. It is a highly unconventional choice that ignores central control in favor of immediate flank pressure. You will need to stay calm and occupy the center while keeping an eye on the kingside tension White is trying to create.

1... e5Black · your move

Push your pawn to e5. By seizing the center immediately, you punish White's neglect of the middle of the board. This move opens lines for your queen and bishop while preparing to challenge the g4 pawn later. It is the most principled response to White's flank attack.

Other paths here: f5 (Grob Opening: Alessi Gambit) · g5 (Grob Opening: Double Grob) · d5 (Grob: 1...d5) · Na6 (Grob: 1...Na6?!)

2. h3White

White plays h3, choosing the London Defense variation to shore up the g4 pawn. While more cautious than the Spike with Bg2 or the aggressive f4 thrust, it signals White's intent to hold the flank. You now have a clear target to pressure as White's kingside becomes increasingly airy.

Other paths here: f4 (Grob: 1...e5) · d3 (Grob's Attack) · Bg2 (Grob Opening: Spike, Hurst Attack)

2... Nc6Black · your move

Develop your knight to c6. This move puts pressure on the center and prepares to support a d5 pawn push. By bringing out your pieces toward the middle, you maintain a flexible setup that can react to White's next moves while keeping your development ahead of your opponent's.

Where you stand

The position is strategically rich. White has gained space but created permanent holes around the king, while Black enjoys a lead in development and central control. Black should look to strike with d5 or h5, while White must quickly bring out the kingside bishop and knight to stabilize the overextended pawns.

• c6-d4 Knight eyes the central d4 square
• d7-d5 Strike the center and challenge g4
• f1-g2 Fianchetto the bishop to the long diagonal
• h7-h5 Undermine the white pawn chain