Sextuple pin-mate (Perhaps show here for the first time*)

Changed mate — transferred mate — Refutations of tries and thematic mate in the same square (f4) — pin-mate with all different units (Q, R, B, S, P)

*1...Bf4  2.d8=Q+  Sxd8 (a) 3.Sf4# (A); 2...Bd6 (b)  3.Qxd6# (B)

1.Sf4+? (A) Sxf4  2.g8=Q+ Se6  3.d8=Q#; 1...Bxf4!

1.Qh2? [2.Qd6, Qe5#]; 1...Sf4!

1.g8=Q! [2.d8=Q#]

1...Bxc5  2.d8=Q+ Bd6 (b)  3.Sf4# (A) (sextuple pin-mate)

1...Bxf2  2.Sxf2 [3.d8=Q#]  cxb5 (defence that refutes the key 1.g8=B?)  3.Qa8# (X)

1...cxb5  2.Qa8# (X')

*According to Encyclopedia of Chess Problems. Themes an Terms, 2012, page 331, "Quintuple pin is the theorical maximun in an orthodox problem".