Black to play and win
H Meihulzen v BE Siegheim 1911
In CJS Purdy terms, the Qc3 is tied to the Bf3, and examining all biffs leads to 1…Re3! and white's position collapses.
A good time to repeat my favourite Purdy poem.
Purdy on nets, pins and ties, Fine Art, vol 2, pg 205
Some things are hooey,
and most others lies;
But forks you mustn't miss,
nor pins, nets, ties.
White is forced to play 2 Rd3, when 2…Rd3 3 Qd3 Qe6! is a double attack- on e1, with Nf4+ threats, and Qh3+-Qh2