Petrov's Defense, Stafford Gambit

Algebraic notation names c6 as the square in column c and row six. In the Stafford Gambit, Black answers White's capture on e5 by moving the b8-knight to c6. If White captures that knight and Black recaptures with the d-pawn, White remains one pawn ahead. Black accepts this material deficit, meaning less total value in pawns and pieces, in exchange for open lines and pieces that can enter the game quickly. That is a gambit: a voluntary material offer made to gain activity.

Where Black’s attack comes from

• The dark-squared bishop can move quickly to c5 and look toward f2.
• The queen can join against squares near the white king, especially if White castles, the special move that moves the king and a rook together, without checking the threats.
• The pawn that recaptures on c6 opens diagonals and lets other black pieces become active quickly.

The Stafford is not a single trap and does not produce a forced attack. If White brings the pieces out carefully, protects the sensitive squares, and avoids automatic captures, White can usually keep the material advantage. Black needs concrete threats; if the attack stops, the sacrificed pawn becomes a lasting disadvantage.