The contract was 3NT... the commentors speculated that it would be nice to make 11 tricks on an squeeze ♠ endplay on WEST. A comment was made that the problem with that is declarer can not cash his diamonds without disrupting the communication... but this is not true (well, not at trick one).... But given EW vul, given DBL showed hearts (a suit headed by at best the T9), the hand is vitual double dummy. South can see the spade KQ and club ACE in WEST hand as easily as we can.... and EAST bidding diamonds, and not passing, probably has 5 if not 6 or 7 diamonds.... so here is the line to make 11 tricks on the squeeze endplay (delayed duck squeeze.. trick is to retain a heart winner).
T1. H6-H3-HQ-HA
T2. DA-DJ-Dx-Dx
T3. DK-Hx-Dx-Dx
T4. Cx-Cx-CJ-Cx
T5. DQ-Dx-Sx-Hx
T6. Cx-Cx-XQ-CA
T7. Hx-hx-Dx-HJ
T8. CQ-Cx-Cx-Cx
T9. C8 <<-------this is the position
Scoring: IMP
So We No E
1C-X-XX-1D
1N-P-3N-all pass
So We No E
1C-X-XX-1D
1N-P-3N-all pass
Would anyone choose this line? well. at matchpoint maybe. And it would have been, as one of the commentors said, pretty impressive... but has to happen very early on the hand... trick two, as every card serves a purpose. Spade ACE as entry, heart winner as control in their suit and ENTRY to dummy for low spade to the 9 on one line, all the cards are busy.
I see now reading and 7 the commentor did mention that the squeeze could have worked by cashing diamonds early.. and that it was a very unlikely line. he is right on both accounts.
Ben

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So We No E
1C-X-XX-1D
1N-P-3N-all pass