Partner has played
♠7 which denies the Queen otherwise we have to speak a word.
In
♣ he has the Queen not the Jack.
In
♥ he has shown the Queen, which adds up his points to 5.
He cannot have the both the outstanding
♦King and the
♥Ace, which would bring him to 12 Points.
He has only one and this cannot be the King. With 8 Points he would bid only 1
♥.
Does he have 5 or 4
♥? I do not like to bid 9 points in a flat hand with a jump, but some - I guess 50% - have no qualms and do it.
Partner has heard me bidding, but he plays
♠in a unattractive A10x.
The only reason to justify this is that he has a doubleton
♠.
The declarer has ducked in
♣ with AK in dummy, which makes hardly sense if has a doubleton.
So declarer has
♠ Qxxx
♥ AQxxx
♦ x
♣ Jxx
or unlikely
♠ Qxxx
♥ AQxxx
♦ xx
♣ Jx
or by hope
♠ Qxxx
♥ AQxx
♦ xx
♣ Jxx
In with the
♦ Queen I stand on the fork:
The 2 unlikely distributions tell me I shall cash the high
♦ for down 1.
The likely distribution gives me another idea:
a) Partner has really 8xx in
♥ and the fourth
♠ promotes the deciding trick for the defense.
b) Partner has no trump more but the declarer goes up high with the
♥Jack and my 10 gets a trick.
I play for the trump establisment because its more sexy if it succeeds.
Everybody can cash high cards.