Chess Opening Theory/1. e4/1...e5/2. f4/2...exf4/3. Nf3/3...g5/4. h4/4...g4/5. Ne5/5...d6

Kieseritzky Gambit

Common moves:
6. Nxg4 - only move

6. Nxg4 is the only sensible move, otherwise it's not clear how White will ever recover the pawn on g4.

Wikipedia has related information at King's Gambit

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Chess openings quick reference

1. e4

2. Nf3

With 2...Nc6:

With other 2nd moves:

2. Other

With 2...Nc6:

With 2...d6:

With 2...e6:

With other 2nd moves:

Anti-Sicilians

1... other

Other

1. d4

2. other

2. c4

With 2...e6:

With 2...g6:

With other 2nd moves for Black:

2. Nf3

2. other

1... other

Flank

Unorthodox