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Chess Opening Theory/1. e4/1...e5/2. f4/2...exf4/3. Nf3/3...g5/4. h4

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< Chess Opening Theory | 1. e4 | 1...e5 | 2. f4 | 2...exf4 | 3. Nf3 | 3...g5
The latest reviewed version was checked on 18 November 2022. There are 4 pending changes awaiting review.
King's Knight Gambit
a b c d e f g h
8a8 black rookb8 black knightc8 black bishopd8 black queene8 black kingf8 black bishopg8 black knighth8 black rook8
7a7 black pawnb7 black pawnc7 black pawnd7 black pawne7 black kingf7 black pawng7 black kingh7 black pawn7
6a6 black kingb6 black kingc6 black kingd6 black kinge6 black kingf6 black kingg6 black kingh6 black king6
5a5 black kingb5 black kingc5 black kingd5 black kinge5 black kingf5 black kingg5 black pawnh5 black king5
4a4 black kingb4 black kingc4 black kingd4 black kinge4 white pawnf4 black pawng4 black kingh4 white pawn4
3a3 black kingb3 black kingc3 black kingd3 black kinge3 black kingf3 white knightg3 black kingh3 black king3
2a2 white pawnb2 white pawnc2 white pawnd2 white pawne2 black kingf2 black kingg2 white pawnh2 black king2
1a1 white rookb1 white knightc1 white bishopd1 white queene1 white kingf1 white bishopg1 black kingh1 white rook1
a b c d e f g h
Common moves:
4...g4 - only move

Black's g-pawn is attacked, and the only move that saves it is 4...g4.

  • 4...f6? simply loses the pawn to 5.Nxg5! since 5...fxg5 6.Qh5+ Ke7 7.Qxg5+ Nf6 8.e5 leads to a winning advantage for White.
  • 4...h6?! also loses the pawn, as 5.hxg5 hxg5 permits 6.Rxh8. Black has no better option but to allow 5...Bg7 6.gxh6 Rxh6 7.Rxh6 Bxh6. This gives White the advantage.
  • 4...gxh4? leaves Black with a terrible pawn structure - doubled isolated pawns on f4, h4, f7, and h7. White doesn't have to capture them right away, often instead playing 5.d4.
  • 4...Bh6 or 4...Be7 followed by 5.hxg5 Bxg5 6.d4! allows White to win the f-pawn back with the move g3 while remaining ahead in development.

Black does have one accurate alternative move to 4...g4, which is to counterattack in the center with 4...d5!?

The line often continues with 5. d4! dxe4 Nxg5 Nf6 which is unclear.

Theory table

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For explanation of theory tables, see theory table and for notation, see algebraic notation.

.

1.e4 e5 2.f4 exf4 3.Nf3 g5 4. h4

4 5
Main Line ...
g4		 Ne5
Nf6
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References

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v · t · e
Chess Opening Theory
1. e4 e5
Open games
2. Nf3
2...Nc6
3. Bb5
Spanish
3. Bc4
Italian
3. Nc3
Three knights
Other
2...Nf6
Russian
2...d6
Philidor
Other
2. f4
King's gambit
2...exf4
Accepted
Other
Declined
2. Nc3
Vienna
Other
1. e4 c5
Sicilian
2. Nf3
2...Nc6 3. d4 cxd4 4. Nxd4
2...Nc6 other
2...d6 3. d4 cxd4 4. Nxd4
2...d6 other
2...e6 3. d4 cxd4 4. Nxd4
2...e6 other
Others
Anti-Sicilians
1. e4 e6
French
1. e4 c6
Caro-Kann
1. e4 other
1. d4 d5
Closed games
2. c4
Queen's gambit
2. Nc3
2. other
1. d4 Nf6
Indian
2. c4 e6
2. c4 g6
2. c4 other
2. Nf3
2. other:
1. d4 f5
Dutch
1. d4 ...other:
1. Nf3
Zukertort
Flank
Unorthodox
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