Grob Opening: Keene Defense, Main Line is a chess opening with the ECO code A00, part of the Grob Opening family. It goes 1. g4 d5 2. h3 e5 3. Bg2 c6 4. d4 e4 5. c4 Bd6 6. Nc3 Ne7. White opens with 1. g4 (the Grob move) and Black answers 1... d5. After 12 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... d5 – Black plays the pawn to d5
2. h3 – White plays the pawn to h3
2... e5 – Black plays the pawn to e5
3. Bg2 – White plays the bishop to g2
3... c6 – Black plays the pawn to c6
4. d4 – White plays the pawn to d4
4... e4 – Black plays the pawn to e4
5. c4 – White plays the pawn to c4
5... Bd6 – Black plays the bishop to d6
6. Nc3 – White plays the knight to c3
6... Ne7 – Black plays the knight to e7
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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