Grob Opening: London Defense is a chess opening with the ECO code A00, part of the Grob Opening family. It goes 1. g4 e5 2. h3 Nc6. White opens with 1. g4 (the Grob move) and Black answers 1... e5. After 4 moves it is White to move. The lesson on the board explains every move of the line and lets you play it yourself; it is free.
The moves
1. g4 – White plays the pawn to g4
1... e5 – Black plays the pawn to e5
2. h3 – White plays the pawn to h3
2... Nc6 – Black plays the knight to c6
About the Grob Opening
White starts with 1.g4, an offbeat and risky move. The idea is Bg2 pressing on b7 and d5, but it weakens White's kingside.
After 1...d5 2.Bg2, White attacks d5 and may play c4.
The g4 pawn can be attacked by ...Bxg4 or ...h5.
White should not castle kingside too fast; the king can be exposed.
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