Lion’s Jaw (3. f3) is one of the decent ways to avoid the Philidor Defense as White. The main reaction from Black is 3… e5 followed by 4. d5 Be7. The ensuing positions resemble the Saemisch Variation of the King’s Indian Defense, with the important difference that the dark-squared Bishop is placed here on e7, and not on g7. White has, in view of his spatial advantage, a generally more pleasant position, but Black is not without counterplay.
Czech Pirc Defense (3. Nc3 c6) allows White to gain a strong pawn center with 4. f4, where Black’s main plan is 4… Qa5, followed by e7-e5. White has two paths to obtain a small, but pleasant advantage: 5. Bd3 and 5. e5.
[Diagram: White to Move] Black is ready to play Nc4, and White has to find how to stop his opponent’s plan. What is the best solution for him?
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