In Quandari I gave only the North hand .This deal is one where a comedy of errors occurred resulting in the only makable contract and that too doubled redoubled. Only one pair achieved this .Here is the full deal.
ALL PASS FINAL CONTRACT 5♦XX BY SOUTH. ♣ LED.
As per agreement 3♠X promised four good hearts.When N bid 5♣ S took it as cue bid North having the ♠A and more so as EAST doubled,,so he cue bid his ♦A.Hewas surprised when it went pass- pass and EAST double.Taking the pass by N as a misclik he redoubled to guarantee the ACE.
5♦XX was easily made.
Kindly pardon my typing errors.Thanks
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Over West's 3♠ opening bid, a 3N overcall was the the doomed BBO consensus. If North's double systemically showed 4♥, then NS were lucky to land on their feet. Presumably, conventional calls were self-alerted?