Grob's Attack
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| Moves | 1.g4 | ||||||||||||||||||||||||||||||||||||||||||||
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| ECO | A00 | ||||||||||||||||||||||||||||||||||||||||||||
| Named after | Henri Grob | ||||||||||||||||||||||||||||||||||||||||||||
| Synonym(s) | Spike Opening  Ahlhausen's Opening Genoa Opening San Pier D'Arena Opening Fric's Opening Kolibri's Opening  | ||||||||||||||||||||||||||||||||||||||||||||
Grob's Attack, or the Grob Opening, is an unconventional chess opening in which White begins with the move:
- 1. g4
 
It is widely considered to be one of the worst possible first moves for White. International Master (IM) John Watson writes, "As far as I can tell, 1 g4 is competitive with 1 h4 for the honour of being White's worst first move. Against an informed or skilled opponent, it is simply masochistic."