hanging pawn
two pawns on the same rank on adjacent files with no pawns of the same color on the files either side of them
en-US/ˈhæŋɡɪŋ pɑn/
en-GB/ˈhæŋɪŋ ˈpɔːn/
two pawns on the same rank on adjacent files with no pawns of the same color on the files either side of them