In each part of this serieshelpmate Black plays a sequence of five
uninterrupted moves to reach a position where White can then give mate.
Black must not move into check, and may only give check on the last move
of the sequence.
a) 1.Sc4 2.Bxd5 3.Bf3 4.Sxe3 5.Sg4 for Bg5 mate.
b) 1.Sc3 2.Rxe3 3.Re6 4.Sxd5 5.Sf6 for Rg5 mate.
Each time a knight must shield a potential check to help a piece open a white line. The piece then returns
the compliment and helps the knight to open a line before it selfblocks. The mating moves on the same square
add to the unity of a perfectly constructed problem.
Jacob Hoover: We have an exchange of roles between the h3-rook and the f7-bishop, as well as an
exchange of roles between the white rook and bishop (between mating and guarding), as well as a couple of
nice ODT effects. As far as I’m concerned, this problem had everything.
Richard Stein: Nice twin based on the converging activities of rook and bishop for both colors.