1...Re5 (c) 2.Sd6 # / 2.R:e5 #

1.a8=Q ? threat: 2.Sd6 # (A) / 2.Sc5 # (B)

1...Se3 2.Q:e3 #

but 1...Rf2 !

1.Bf6 ? threat: 2.Sd6 # (A)

1...Rg:f6 (a) 2.Sc5 # (B) (2.Q:g2+?)

1...Rf:f6 (Be5) 2.Sc5 #

1...Rd5 (b) 2.Q:g2 # (C)

1...Ba3 2.Qd4 #

but 1...Sf7 !

1.Be5 ! threat: 2.Sc5 # (B)

1...R:e5 (c) 2.Sd6 # (A) (2.R:e5+? 2.Q:g2+?)

1...Rg5 (R:h5) 2.Sd6#

1...Rc6 (d) 2.Q:g2 # (C)

1...Ba3 (Bd4) 2.Q(:)d4 #

pseudo-Le Grand (AaB-BcA), Barnes (AB-A-B), transferred mate (bC-dC), antiduals (aB-cA)