This the list of reasonable 4-pawn openings after 2 moves with more than 1000 games available in Game Explorer here:
... to be continued
Conzipe : good idea! I'll look at longest master pawn's openings and will post a short list of them!
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This the list of reasonable 4-pawn openings after 2 moves with more than 1000 games available in Game Explorer here:
... to be continued