NS were a couple of "experts" who took a bath on this one.
Pass pass to West, who opened 1♦.
North overcalled 2♣.
East raised to 2♦.
South passed.
West passed.
North re-opened with a double.
East passed and South now bid 2NT.
West bid 3♦, passed around to South, who doubled.
3♦ doubled played by West was the final contract.
The play:
t1. North opened with his King of ♣, felling West's stiff Queen.
t2. Seeing the Jack of ♣ in dummy, North then switched to his weakest suit
t3. Reading the position perfectly, and with the 9 of ♠ in dummy, declarer played the ♠ ten from his hand and ducked when North played the 8, declarer's ten holding the trick.
t4. Declarer then takes the Ace of ♠ in dummy.
t5. Declarer leads the ten of ♦ from dummy, covered by South with his King, and declarer takes his Ace of ♦.
t6. Low heart from West, taken by South with his Ace.
t7. Club back from South, declarer ruffing.
t8, Another ♥ by West, North winning his Jack.
t9. Ace of clubs by North, West ruffing again.
West now ruffs a ♥ in dummy for his 7th trick. and scores his two top trumps to make his contract.

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