Benko Gambit: Mutkin Countergambit
The a6-b5 pawn sacrifice. Pressure on a and b files.
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1. d4 › Mutkin Countergambit
Change
Sequence
1.d4Nf62.c4c53.d5b54.g4
About this opening
The Mutkin Countergambit (4.g4) answers the Benko with a bold wing counter-thrust: instead of classically accepting or declining, White pushes g4 to grab kingside space and fix the f-pawn. The idea is sharp but weakens White's position; Black has immediate counterplay. It is a rare and risky line, to be used with full awareness.