The intra-finesse
Step 4 of 4
The same cards, and an auction
The same eight cards, and this time West opened the bidding with a five-card suit of his own. That leaves him eight unknown cards where East has thirteen, so any given card of this suit is likelier to be East's, and any short holding is likelier to be West's.
The line you were told to postpone a screen ago is a bet on exactly that. Play it now.
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