Soultanbeieff Variation is a solid choice for the players of Black when they want to avoid well-examined lines of the Slav Defense, which is often met with 6. e3 as the most common continuation for White.
Both of these lines require accurate play from Black, but if he reacts properly his position should be fine.
[Diagram: White to Move] A. Grischuk – S. Karjakin, Nice (rapid) 2010. When attacking, every tempo is priceless. Grischuk missed the right moment to get a strong attack with a piece sacrifice. What is the best way to continue as White?
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