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chr-ord lambda ONE LINE solution in Clear category for Pawn Brotherhood by katnic
safe_pawns = lambda P: sum( [ 1 for p in P if chr(ord(p[0])-1)+str(int(p[1])-1) in P or chr(ord(p[0])+1)+str(int(p[1])-1) in P ] )
Aug. 14, 2021
