In a helpmate of Onitiu type (1.4.1…) Allumwandlung with single Pawn in White's variations.
See also: Allumwandlung.
Carrà, Arturo
L'Italia Scacchistica, 1952
1.Kd5
c8=Q
2.Ke4
Qc5
3.Kd3
Qd4#
1.Kd5
c8=S
2.Kc4
Kxe2
3.Sb3
Sb6#
1.Kd5
c8=R
2.Ke4
Rc4+
3.Kd3
Rd4#
1.Kd5
c8=B
2.Kc4
Kxe2
3.Bb5
Be6#