consider double push in connected passer logic
when the supporting pawn is one push away from the passer. the possibility of an en-passant refutation is discarded, for simplicity.

SPRT: tc=20+0.1 elo0=0, elo1=6, alpha=beta=0.1, drawelo=200
Score of test vs bench: 759 - 657 - 1440  [0.518] 2856
ELO difference: 12
SPRT: H1 was accepted

signature = 8325970