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Chess Opening Theory/1. e4/1...e5/2. f4/2...exf4/3. Nf3/3...g5/4. Bc4/4...g4

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< Chess Opening Theory‎ | 1. e4‎ | 1...e5‎ | 2. f4‎ | 2...exf4‎ | 3. Nf3‎ | 3...g5‎ | 4. Bc4
The latest reviewed version was checked on 13 July 2022. There is 1 pending change awaiting review.
King's Gambit Accepted, 4...g4
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 kingh5 black king5
4a4 black kingb4 black kingc4 white bishopd4 black kinge4 white pawnf4 black pawng4 black pawnh4 black king4
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 white pawn2
1a1 white rookb1 white knightc1 white bishopd1 white queene1 white kingf1 black kingg1 black kingh1 white rook1
a b c d e f g h
Position in Forsyth-Edwards Notation (FEN)

rnbqkbnr/pppp1p1p/8/8/2B1Ppp1/5N2/PPPP2PP/RNBQK2R w

Moves: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4
Parent: King's Gambit

King's Gambit Accepted, 4...g4

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With this move, Black reveals the full purpose of 3...g5 — not only did the g pawn protect Black's extra f pawn, it also threatened to dislodge White's sole defender of the h4 square, the knight on f3. White must now reconcile the dual threats of 5...gxf3 and 5...Qh4+.

White can safely ignore the threat with 5.O-O!, sacrificing his knight in order to move his king to safety, develop his rook to the semi-open f file, and rapidly develop his queen to f3. If White so chooses, he can sacrifice a second piece to move the Black king to the f-file, giving White excellent practical chances.

Because the Muzio and double Muzio gambits give Black an overwhelming number of problems to solve over the board, most players avoid this line completely and simply play 4...Bg7 with a good game.

White's alternative fifth moves, 5.Nc3!? and 5.Bxf7+, are relics of a bygone era and thus rarely seen in tournament play, also Ne5 allows Qh4+.

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.Bc4 g4

5 6 7 8 9 10 11 12 13 14  
Muzio Gambit O-O!
gxf3		 Qxf3
Qf6		 e5!?
Qxe5		 d3
Bh6		 Nc3
Ne7		 Bd2
Nbc6		 Rae1
Qf5		 Nd5
Kd8		 Qe2
Qe6		 Qf2
Qf5		 =
Double Muzio Gambit ...
...		 ...
...		 ...
...		 Bxf7+
Kxf7		 d4
Qf5		 g4
Qg6		 Bxf4
Nf6		 =+
McDonnell Gambit Nc3!?
gxf3		 ∞
Wild Muzio (Lolli) Gambit Bxf7+!?
Kxf7		 ∞

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Wikipedia has related information at Kings Gambit

5. Ne5

References

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