Latvian Gambit Mason Countergambit Discovered Attack in Chess

The latvian gambit mason countergambit discovered attack is a tactical motif where Black’s counterplay in the Latvian Gambit (often via the Mason Countergambit structure) creates a discovered attack—typically by unblocking a piece so it suddenly targets the white king or a key defender. The defining feature is that a move or capture “opens” a line (commonly along a diagonal or file) while White’s king is still exposed from the gambit phase.