H#9: Promotion of three black pawns to three queens in a single solution. Yet unachieved task.
⧖ Jean Oudot (1926-1974).
See also: 100 Dollar theme; Promotion.
Pfeiffer, Gerhard
Die Schwalbe, 1985
Spec. HM
1.d1=Q
Kg1
2.Qd5
Kh1
3.Qf3
gxf3
4.a1=Q
f4
5.Qa2
f5
6.Qe6
fxe6
7.c1=Q
e7
8.Qc5
e8=S
9.Qa7
Sc7#
Fiebig, Reinhardt
harmonie, 2005
Spec. HM
1.e1=Q
Ka1
2.Qc3+
Kb1
3.Qb3+
axb3
4.f1=Q
bxc4
5.Qf4
c5
6.Qd6
cxd6
7.g1=Q
d7
8.Qg6
d8=S
9.Qh7
Sf7#