Chess Opening Theory/1. e4/1...e5/2. Nf3/2...f5/3. Bc4/3...fxe4/4. Nxe5/4...Nf6

Mayet Attack: Corkscrew Countergambit C40 Mayet Attack Latvian Gambit: Mayet Attack, Corkscrew Countergambit This gambit is utterly unsound but venomous if White doesn't know the refutation. It invites 5. Nf7 forking the queen on d8 and rook on h8, but Black will try to create an attack after 5...Qe7 6. Nxh8 d5, the Corkscrew Gambit. Black hopes for 7. Bb3? Bg4!, where White has to sacrifice a queen with 8. O-O Bxd1, or face an overwhelming attack with 8. f3 exf3+ 9. Kf2 Ne4+. However, if 7. Be2! is played instead, Black will find it hard to prove sufficient compensation for the sacrificed rook. 5. Bf7+ is another good move, where after 5...Ke7 6. Bb3 Black has an awkward king on e7 that cannot castle and hinders development of the bishop on f8, without getting into the complications of Nf7.