Declarer, South is in 4S. The play goes as follows:
club lead, jack, queen, ace
Jack of diamonds, king, ace
Queen of spades, king, ace
jack of spades (all following)
heart to the ace
heart ruff
club to the king
heart ruff
Queen of diamonds
10 of diamonds discarding the 9 of clubs
Declarer is now here with the lead in dummy
Declarer now shows his hand and says something like "these are all good apart from your trump trick". When it is pointed out that the HQ is not a winner, he says "well I'll just play a master club from dummy, that's good" (i.e. he clearly knows that the long diamond isn't good and the club is).
11 or 12 tricks?