Otto Wurzburg
Otto Wurzburg had problem composition in his genes, being the nephew of
the great William Shinkman. He was just as versatile as Shinkman,
composing everything from lightweight Bohemians to full-blooded
strategic problems.
The unexpected key 1.Bd1 threatens 2.Sxb3+ Sxb3 3.Rxc2, but seems pointless, as it allows Black
to queen with check. However, after 1...cxd1Q+ 2.Kxf2 Black is in zugzwang! Variations include
2...Sc2 3.Sxb3; 2...c6 3.Qd6; 2...Qf3+ 3.Kxf3; 2...Qg1+ 3.Kxg1; 2...Qf1+ 3.Kxf1; 2...Qe2+, Qh1 3.Q(x)e2;
2...Qe1+, Qh5, Qg4, Qc2 3.Q(x)e1; 2...Be3+ 3.Qxe3; 2..Bf4 3.Qxf4; 2...Bg5 3.Qxg5.
A few moves lead to dual mates. The only other variation is
1...Kxc1 2.Sd3+ Kb1 3.Qb2 or 2...Kxd1, Kd2 3.Qe2.
The problem, appropriately, won its award in a Memorial Tourney for Sam Loyd.