The Spanish Variation, though nominally a part of the Four Knights Game, is typically reached by transposition as an Anti-Berlin reaction from White (at least in recent years).
The so-called Double Ruy Lopez, starting with 4… Bb4, is covered as the main variation in Line 374. As a viable alternative, there is also 4… Bc5, which generally leads to satisfactory positions for Black.
[Diagram: White to Move] In an engine game White failed to find the best way to re-ignite his attack. What was the best way to proceed?
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