Arnhem theme

White has two thematic tries. Two thematic black defences alternatively either defeat the try or are
met in either try with the same mate.

Scheme:
1.X? a 2.A, 1…b!
1.Y? b 2.A, 1…a!

cyclic Arnhem theme

White has three thematic tries. Three thematic black defences alternatively either defeat the try or are met in with the same mate.

Scheme:
1.X? a 2.A, 1…b!
1.Y? b 2.A, 1…c!
1.Z? c 2.A, 1…a!

Iwanow, Eugeniusz
H.Mattison-75 MT, Shakhmaty (Riga), 1970-71
1st Prize
FIDE Album 1068-70

selfmate in 2 moves