The lead was with North, and I knew that East had the master ♦ and master ♠ and 2♥, but I didn't know if he had the Q or not. But when I played the ♣Q, East had to discard a ♥ (if he discards the ♦, I can discard the ♥J and dummy is good; if he discards a ♠, I discard a ♦, and the ♠4 leads to a simple show up squeeze). But now I know to drop West's ♥Q
This is not an overly complicated end position, and it can't be original, but I don't recall seeing it before in eg Love or Kelsey (although admittedly it has been a while since I read either of those).