The move 4.f3 has been considered as the sharpest way for White to play against the Nimzo-Indian, and in recent years this system has become a main alternative for players with White who want to avoid the more traditional lines such as 4.Qc2 (The Classical Variation) or 4.e3 (Rubinstein Variation).
In the recent encounter Adhiban-Delgado Ramirez from the World Cup, Black certainly didn't choose the most challenging setup when he tried 6...c6, but the way, in which the Indian GM treated this particular line, was still quite impressive. After 22 moves Adhiban's opponent resigned because he was mated. There's a reason why the fearless Indian player has 'the beast' as a nickname!
Exercise: Do you see the final shot which finishes the game off in style?
You can move the pieces on the live diagram!
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