What kind of squeeze is this?
(Page of 2)

North
7
A9864
K3
J9876
South
AKQJ10542
7
109
K5
W
N
E
S
P
P
3
4
P
P
P

West leads 7, declarer puts up K; East wins with A, cashes J and plays 8. Declarer contemplates his options.

"Since West is rated to hold A, I don't stand much of a chance. May East have stiff Q? Unlikely. Or how about playing J from dummy? If East has Q, he might not cover? Noo, that won't work.

What if West has KQJT(x)? Then, would he be squeezed? How to rectify the count, though? But hold on a second... West cannot guard s without baring A in the last three cards. So, squeeze might work, no need to rectify the count. Still a very slim chance, it looks best to cash trumps and see what happens."

North
7
A9864
K3
J9876
South
AKQJ10542
7
109
K5
W
N
E
S
P
P
3
4
P
P
P

(Opening lead was 7, which went K and A; then East cashed J and played 8.)

At trick three, declarer wins A and cashes six more s, watching discards of opponents. Both opponents follow s twice; then, West pitches three s (2, 3 and 5) and two s (3 and 2), East pitches five s (no s out). From declarer's angle, it is probable that the four-card ending is something like this.

West
KJ
AQ
North
A9
J9
East
Q10
104
South
2
7
K5
D

At this position, declarer cashes his last . While West is shortly hesitating before parting with J, it dawns on declarer:

"What if East has Q and T? What were the spots pitched by West and from the dummy? O oo, or am I making this 4?!"

Declarer discards 9 from dummy baring J, and East discards T (good news!). Now, declarer goes to A and plays J, covered by Q and K. West wins A, and at the thirteenth trick, tosses 4 on the table.

The whole deal:

West
93
KJ532
74
A432
North
7
A9864
K3
J9876
East
86
Q10
AQJ8652
Q10
South
AKQJ10542
7
109
K5
W
N
E
S
P
P
3
4
P
P
P
D
4 South
NS: 0 EW: 0

In the last three cards, West has to keep A doubleton, so, he abandons s; then, East has to guard s, so, he bares Q. Is this a special kind of double squeeze (involving just two suits with a stepping-stone feature)?!

NOTE: This deal was fabricated from a deal that came up in the Pairs Finals of the 9th European Open Championships held in Istanbul in the second half of June 2019.