
Robert Ris: "Sicilian Najdorf fans are in for a treat this week! In round 1 of the Prague Challengers, Black managed to win in spectacular fashion (only 29 moves!) in the game Kourkolos-Bjerre. The Danish GM avoided the heavily analysed main lines and opted for the sidelines with 9...h6. An excellent choice, as White failed to find the right plan and Black got a dream Najdorf with a safe king and all his pieces aimed at the white king.
White has just played 20.f4, intending to open the centre. How should Black respond?
Feel free to move the pieces on the live diagram!
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