Grob Opening
White's rudest first move: 1.g4 weakens its own king on move one to drag the game into territory where only one player owns a map.
On the very first move, White loosens the kingside and shoves forward a pawn that will often be left hanging for the rest of the opening. The pawn is not really the point. The bishop is. Bg2 lands on the long diagonal, and the g4-pawn buys time and open lines against Black's queenside. C4 and Qb3 tricks against b7 and d5 arrive with surprising speed.
The opening is named for the Swiss master Henri Grob, who analyzed 1.g4 extensively and tested it in a huge number of correspondence games. Decades later the English IM Michael Basman championed it at tournament level. That career-long argument was that unbalancing the opponent is worth more than opening-book approval. The Grob's whole spirit runs on this: it trades a little objective health for a lot of practical discomfort.
The critical moment comes immediately. After 1...d5 2.Bg2, Black faces a choice. The move 2...Bxg4 looks free but walks straight into the c4 and Qb3 machinery. Calm development leaves Black simply better placed. The Grob is an opening that loses to patience. It beats greed.
Everything runs through the g2-bishop. White plays Bg2, then c4 and often Qb3. These moves hammer d5 and b7, the squares Black's most natural first moves leave tender. The g4-pawn is treated as bait rather than a weakness. Typical follow-ups are h3 to keep the pawn, Nc3 with quick queenside play, and an early c4xd5 to pry the long diagonal open. White accepts that its own king may live in the middle or castle long.
Take the center and keep your head. 1...d5 or 1...e5 with sober development gives Black everything the position promises. The g4-pawn can be taken: 2.Bg2 Bxg4 is the main line. But do this only with care. Support d5 with ...c6 and ...e6, and be willing to hand the pawn back rather than defend everything. Long term, White's loosened kingside is a permanent target. Keep pieces on and the weaknesses tell all the way into the endgame.
At club level (1600-2000 on Lichess) only 0.3% of games start 1.g4, and it scores 51% for White across roughly 6.8 million games, the same 51% that 1.e4 scores. Black's main tries barely dent it: 1...d5 (42.9% of games) scores 48% for Black, 1...e5 (20.6%) also 48%, and the third most common reply, 1...c5 (7%), only breaks even at 50%. Whatever the engines think of the Grob, at this level its surprise value is measurably real.
Henri Grob — The Swiss master who gave the opening his name. He analyzed 1.g4 in depth and played it in a vast number of correspondence games.
Michael Basman — The English IM who championed 1.g4 for decades at tournament level, the opening's best-known modern advocate.
The signature Grob trap. Black grabs the free-looking pawn. After c4 and cxd5 the queen lands on b3. It hits b7 and d5 at once while the g2-bishop x-rays the same diagonal. 5...e6 holds d5 but 6.Qxb7 forks the a8-rook. Black's queenside caves in while the extra pawn sits uselessly on g4.
- Family
- Grob Opening
- Category
- Flank
- First move
- Other
- ECO
- A00
- Line
- 1. g4