Baltic, German and Santasiere's Folly have the distance 0 between them in principal HFZ metric cuz joinable by reversible moves. Schiffler-Sokolsky is of height 3 above them.
http://www.chess.com/forum/view/chess-openings/height-of-an-opening
http://www.chess.com/forum/view/chess-openings/distance-between-openings
how about the wing gambit variation of the Sicillian where game proceeds :
1.e4 c5 2.b4 
just for Igor lol
how about the wing gambit variation of the Sicillian where game proceeds :
1.e4 c5 2.b4 just for Igor lol
It's a 4be|5c-opening in my classification. If black accepts it then it's b|c2b-gambit.
Here I'm looknig for openings with advanced b- and d-pawns. No other pawns should be advanced beyond 3rd range for white and 6th for black.
That's what I discovered so far:
Polish Opening: Baltic Defense (A00)
1.b4 d5 2.Bb2 Bf5
Polish Opening: Schiffler-Sokolsky Variation (A00)
1.b4 Nf6 2.Bb2 d5 3.e3 e6 4.b5
Polish Opening: German Defense (A00)
1.b4 d5 2.Bb2 Qd6
Zukertort Opening: Santasiere's Folly (A06)
1.Nf3 d5 2.b4