Sankt Petersburg theme
A white Allumwandlung occurs where a white Pawn promotes to the same kind of piece that Black puts en prise for it. In the cyclic form of the theme a white Pawn promotes to a piece of different kind than the one Black puts en prise for it, in cyclic fashion.
See also: Allumwandlung; Mixed Phoenix.
Bene, Viktor
Jonsson, Bernt Christer
Uralskij Problemist, A. Ivunin-50 JT, 1997
3rd Comm.
h#2 (5+8)
b) wPf6→e6
c) wSe8→e3
d) bKc6→e6
a) 1.Sc8
bxc8=S
2.Qb5
Se7#
b) 1.Bc8
bxc8=B
2.Sd5
Bd7#
c) 1.Ra8+
bxa8=R
2.b5
Ra6#
d) 1.Qc8+
bxc8=Q
2.Sf5
Qc4#
Feather, Christopher John
Scrapings, 1999
h#2 4.1... (4+8)
1.Sc8
dxc8=B
2.Bb6
Qd7#
1.Bc8
dxc8=R+
2.Kb7
Qc7#
1.Qc8
dxc8=S
2.Sb5
Se7#
1.Re8
dxe8=Q+
2.Kd5
Qe4#
Sankt Petersburg theme (cyclic).