Editing Grob's Attack (section)

=== Critical Lines In Engine Play ===
Leela, Stockfish, and Komodo have all failed to hold the Grob against engines of similar strength.<ref>{{Cite web|url=https://wiki.chessdom.org/TCEC_Season_18_This_is_not_a_SuFi_Bonus_Game_39:_LeelaCPU-Stockfish|title=TCEC Season 18 This is not a SuFi Bonus Game 39: LeelaCPU-Stockfish}}</ref> 

After 1.g4 d5 white has five main moves;

*Bg2, pressuring the h1-a8 diagonal.
*c4, preparing Qb3xb7 and undermining d5.
*g5, moving the pawn out of harm's way.
*e3, leading to [[French Defence|French]]-type structures.
*h3, defending g4.

2. Bg2 or g5 is played in the vast majority of games as e3 and h3 surrenders the initiative and leads to inferior versions of more common openings. 2.c4 usually transposes to 2.Bg2 main lines but does give both Black and White a few options for unique sidelines.

==== Grob's Gambit, 2.Bg2 Bxg4 3.c4 ====
Against the Grob Attack's main line, Stockfish has opted to keep the initiative by giving back the b7 pawn as Black. After the moves 3... c6 4.Qb3 e6 5.Qxb7 Nd7 Black has gained a secure King and lead in development.

{{Chess diagram|fen=r2qkbnr/pQ1n1ppp/2p1p3/3p4/2P3b1/8/PP1PPPBP/RNB1K1NR|align=tleft}}

Due to White's overextended Queen and general lack of coordination, Black retains a potentially decisive advantage. c6 is a [[poisoned pawn]] as Qxc6 would be met by Rc8 and Rxc4.<ref>{{Cite web|url=https://wiki.chessdom.org/TCEC_Season_18_This_is_not_a_SuFi_Bonus_Game_39:_LeelaCPU-Stockfish|title=TCEC Season 18 This is not a SuFi Bonus Game 39: LeelaCPU-Stockfish}}</ref>

==== 2. g5 Gambit ====
An alternative attempt to save White's game is to gambit the d4 pawn in exchange for rapid development with 1.g4 d5 2.g5 e5 3.d4 exd4 4.Nf3 c5. This line has been explored in a widely cited theoretical correspondence game on the TalkChess forum.

{{Chess diagram|fen=rnbqkbnr/pp3ppp/8/2pp2P1/3p4/5N2/PPP1PP1P/RNBQKB1R|align=tleft}}

However, after 5.Bg2 Ne7 6.c3 dxc3 7.Nxc3 Nbc6 8.0-0 d5, Black still retains a possibly decisive advantage.<ref>{{Cite web|url=https://talkchess.com/forum3/viewtopic.php?p=825830#p825830|title=Dylan Sharp Vs. Harvey Williamson (G4)}}</ref>