ECO D70
Expert
Grünfeld Defense
Dynamic …d5 vs d4/c4: Black accepts a wide white center to counterattack.
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Recommended level
Advanced (~1700+): tactics and complex endings.
Overview
After 1.d4 Nf6 2.c4 g6 3.Nc3 d5, Black aims for …Bg7 and pressure on d4. Kasparov and many GMs championed it.