Barry was primarily a composer of directmate two-movers. In this problem he presented an idea which the Good Companions missed half a century earlier.
1.Bb2 threat 2.Rc3
1…Qb3 2.O-O-O
1…Qxb2 2.Rd1
1…Sxb2 2.Ra3
1…Qb4+ 2.Sxb4
A complete half-pin which includes a castling mate. Judge Viktor Melnichenko praised the construction and described the problem as the finest two-mover involving castling that he had seen.