Latvian Gambit: Clam Gambit is a chess opening with the ECO code C44, part of the Latvian Gambit family. It goes 1. e4 e5 2. Nf3 Nc6 3. d3 f5 4. exf5. White opens with 1. e4 (the king's pawn) and Black answers 1... e5. After 7 moves it is Black to move. After the last move White is a pawn ahead in material. The lesson on the board explains every move of the line and lets you play it yourself; it is free.
The moves
1. e4 – White plays the pawn to e4
1... e5 – Black plays the pawn to e5
2. Nf3 – White plays the knight to f3
2... Nc6 – Black plays the knight to c6
3. d3 – White plays the pawn to d3
3... f5 – Black plays the pawn to f5
4. exf5 – White captures on f5 with the e-pawn
About the Latvian Gambit
After 1.e4 e5 2.Nf3, Black plays the risky 2...f5. It is like a King's Gambit for Black, but a tempo down, so it is objectively dubious.
Black wants to open the f-file and attack fast.
White's strong reply is 3.Nxe5, hitting e5 and eyeing Qh5+.
The e8-h5 diagonal is weak for Black; watch for Qh5+ tricks.
chessGM