Diamonds trumps. North on lead. Declarer needs four of the last five tricks.
The ♣K forces east to discard
a/ a heart in which case declarer can lead the jack pinning the 10, pitching a spade and establishing the ♥7.
b/ a spade in which case if west pitches
i/ a heart then declarer can lead a low heart pitching a spade and felling the ♥Q establishing the ♥J.
ii/ a spade now ♠A and another establishes south's ♠J with the ♦2 (trump) as entry.
Does anyone have a name for this position?
It is an automatic double trump squeeze without the count.