By choosing 4. e3 against the Four Knights Variation of the English Opening, White supports the d4-square with his e-pawn and later indends to play d2-d4.
Depending on the taste, Black usually opts for one of the following: 4… Bb4, 4… Be7, 4… d6 or 4… d5.
Variation 4… Bb4 is aimed against White’s d2-d4 advance, and after 5. Qc2 the two most frequent continuations from Black are the Romanishin Variation (5… Bxc3) and 5… O-O 6. Nd5 Re8, where 7. Qf5 is the initial position of the Stean Variation.
Reversed Paulsen Variation of the Sicilian Defense, occuring after 4… d5 5. cxd5 Nxd5, is typically very sensitive for Black since it requires his full attention.
[Diagram: Black to Move] White’s last move was a defensive one: Rd1-d4 brings the Rook to an active role in protection against Black’s strong attack. Still, Black has a powerful response, which should secure him a big advantage!
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