And here's more. An article by Larry Kaufman points to yet another nice example from Fischer, this one played against Daniel Collins in a simul in 1964:
[FEN ""]
[White "Bobby Fischer"]
[Black "Daniel Collins"]
[Result "1-0"]
1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5 5.Nc5 Qc7 6.Bd3 Bxd3 7.Nxd3 Nd7
8. Bf4 Qb6 9.Nf3 f6 10.O-O O-O-O 11.a4 Re8 12.a5 Qd8 13.Re1 g5 14.Bg3 h5
15. h4 g4 16.Nd2 Nh6 17.Nc4 Nf5 18.a6 b5 19.Na5 Qb6 20.Nc5 Nxg3 21.Re6 Nb8
22. fxg3 Rd8 23.c3 Rd6 24.Qe2 Rxe6 25.Qxe6+ Kc7 26.b4
In the final position given here (which isn't the final position of the full game), note that:
The black queen has no safe squares.
... Nxa6
allowsQd7+
and impending doom.... f5
allowsQe5+
, forking the king and rook.A rook move allows
Qg8
and the bishop is lost.A bishop move allows
Qxe7+
.Black wasn't actually in Zugzwang yet, as he could have safely played
26. ... Kd8
, but after27. Nab7+ Kc7
(... Ke8 28. Nd6+ Kd8 29. Qc8#
)28. Kh2
the Zugzwang would be in full effect.