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Chess Opening Theory/1. g4/1...f5
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Alessi Gambit
1...f5 · Alessi Gambit
This offbeat, dubious gambit attacks the g4 pawn immediately, but allows White to take the pawn with 2. gxf5.
Advantages of 1...f5:
Puts opponent off their comfort zone.
Unknown, relatively surprising.
Confuses lots of players.
Can be tricky.
Goes out of known theory.
Disadvantages of 1...f5:
Weakens kingside.
Sacrifices pawn for no apparent reason.
White can get a good position if they know that they are doing.
Does not contribute to development.
Even if we develop (Nf6, Bg7, Qe7, O-O, Bf5, Nc6, O-O-O), White can keep up and consolidate their one pawn advantage.
Theory table
1 2. gxf5 Nf6 3. e4! d6 4. Nc3 e6 ++ Alessi gambit 2. ... ... 3. ... Nxe4?? 4. Qh5+! g6 5. fxg6 +++