Within a month after playing my first ever Compound Squeeze I was South on this hand in no-trumps with no opposition bidding. Fortunately the opening lead was kind.
First trick, playing 4th highest leads from an honour, 2nd from small cards (standard British):
3 4 K A
You might as well sort the s out so you lead another, T 5 2 6. You have to take the finesse so you do. 2 7 J K.
Now, how do take twelve tricks on the return of
After the last hand I was looking for Compound Squeezes. The basic requirements are two B menaces, ie a menace against both opponents accompanied by an entry. These are North's 6 and the J. Of course they are only actually a menace against one opponent but when it is not known which opponent you can sometimes play a Simple Squeeze as a Double Squeeze or Compound Squeeze, and a Double Squeeze as a Compound Squeeze. I learnt this from Clyde E Love's book, Bridge Squeezes Complete. A further requirement is a single menace sitting over the opponent and this seems to be the 9. So how about a Compound?
I could not see it, and finally decided regretfully that after the T return there was no Compound. I played A, A, Q, T, Q, not really quite sure who I was squeezing in what! When West discarded a on Q the 9 was of no further interest so I discarded it. After 3 rounds of s I found West had the guard. His last 2 cards were J and J so I took the finesse since he had no s.
Afterwards I checked my notes to see why the Compound did not work. With only one honour with the B threat in the hand containing one threat (K) this is what is called a Type L restricted Compound. According to my notes:
That means that:
Suppose E returns a instead of a . Now we have two honours with the B threat in the hand containing one threat (K and A) and this is what is called a Type L unrestricted Compound. According to my notes there is no other requirement!
Cash Q discarding a , cash the s discarding a from dummy, decide which suit West has abandoned. If West does not have length now cash A then K, discarding 9 if it is not good. Either the Q falls or the s run. If West appears to have abandoned s play 3 rounds of s. If the 9 and 4th are not good the Q will fall. One of the advantages of the Compound is that if the Q is doubleton offside you get 12 tricks while a finesse would lose.
So the T return spoilt my second Compound in a month!
The classification of Compound Squeezes (slightly amended and improved from Love) is here.