Some openings are more popular than others. This holds true for SOS lines as well. A case in point is Alapin's 2.d3 against the Dutch. OK the early queen move may not be the refutation of the Dutch, but it is sufficiently tricky to merit some attention. Yet, Alapin's line has been played in suprisingly few games ever since its publication in SOS-1. Possibly the next miniature win by the young German GM Baramidze will whet your appetite?
Black is virtually forced to go for the Stonewall, and this is one of the points of 2.d3. How many Leningrad players like to be forced into playing such a solid but inflexible pawn structure? White should answer
2...d6 with
3.g4 (less good is
3.e4 since Black gets an edge in development after
3...fxe44.xe4f65.h4f5)3...fxg44.h3 with interesting play. Both
2...g63.e4fxe44.xe4f65.h4 and
2...e63.e4fxe44.xe4f65.h4 are preferable for White.