Opening Traps

A faulty discovery by Black in the Keres Attack.

A seemingly natural developing move in the Keres Attack leads to the loss of the game.

Evans Gambit -- Removal of the Defender of the f7 Square.

Queen Wandering in the Benko.

Mating Attack -- Unprotected Piece

Black mixes two systems, the Archangel and the Open System. It doesn't go well.

Sometimes, Black's ...Nf6? in the Evans Gambit can be a losing move. 

A plausible looking retreat leads to the loss of a piece. 

Black grabs a Rook on a1 and forgets about a certain King on e8 in the Muzio Gambit.

Black trades off a light-squared Bishop, and it turns out he missed it rather badly. White wins because of opposite colored Bishops.

White allows a mating attack, and Black's grip on the dark squares decides the game.

Black opens up lines for White with a premature pawn break in the Sicilian, with drastic consequences.