Latvian Gambit: Mason Countergambit

1.
1. e4
2. e5
2.
3. Nf3
4. f5
3.
5. d4

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The Latvian Gambit: Mason Countergambit is a chess opening classified under ECO code C40 (Open games). It is a variation of the Latvian Gambit family. Step through the moves on the board above, then play the line yourself or review it with the built-in engine.