You are RED v GREEN, PAIRS, with bidding: -

[2♥](a) [2N](b)

[P]       [6N](c) End.

(a) 6-card Heart suit in the range 6-10 HCP.
(b) 16-18 NoTrump
(c) I told you! It's PAIRS!!

Opening Lead: ♣ J.

♠ AQT763 ♥ 6 ♦ KT52 ♣ A8

♠ K54 ♥ AK532 ♦ AQ7 ♣ Q3

Plan your play, then read on.

First of all you noted the missing honour cards: ♠ J, ♥ QJ, ♦ J, and ♣ K (you've just seen ♣ J). The lead marks RHO with ♥ QJ plus ♣ K.

In good standard Bridge, RHO should not be opening in the first seat when 4:6 in the Majors though in third seat it would be de rigueur. LHO cannot hold more than a singleton Heart for he would surely have led that suit rather than a JT-high Club suit.

Count your tricks! 6 Spades, 2 Hearts, 3 Diamonds, and one Club comes to 12 tricks, however in Spades you have to be a tad careful though you can pick up ♠ J982 with LHO by either leading to ♠ Q, or (on these cards) by leading ♠ K (taking the appropriate line whenever RHO fails on the first round!).

You play ♣ A at trick 1, and now you can simply cash all your winners, playing the Diamond suit at the end and make 13 tricks whenever the Diamonds are 3:3. Satisfied? So, what's so 'special' about this hand? Well at PAIRS you would like to make all 13 tricks (and if you do, you will score 71% on the board, and almost the whole planet would accept any score way above average!).

There is no need to rush at the hand and the first move might well be a Spade to hand (RHO follows with ♠9) that proves the suit is 'good to go'. If you cash the Spades then you will have to discard three times from hand and you can certainly pitch two small Hearts, then decide what to throw after RHO has played. RHO will have pitched ♥ 7, ♥ 4, ♥ 8 and on the 5th Spade ♦ 6. When you play the last Spade from dummy RH0 will pitch ♦ 3. You cash ♥ AK (LHO pitches another Club...he has already pitched three Clubs) followed by the ♦ A, then ♦ Q, noting ♦ J falls from RHO, and you claim your 13 tricks.

What has been happening?

Well RHO held: - ♠ 9 ♥ QJ9874 ♦ J863 ♣ K9 and has just been put through the grinder of a squeeze-play because he held all the remaining cards that matter: he could not afford a fourth Heart discard (your ♥ AK5 in hand would then make 3 tricks) as he knows that you hold both high honours (his partner did not lead his bid suit: he would certainly have led, say, the singleton King...and, indeed, might have elected to lead his singleton ten). So his only realistic try was that declarer held ♦ A7 alone, with a 3-card Club suit Queen-high, then his partner's ♦ Q94 would generate a trick for the defence. Notice that RHO discards without angst, huffs, puffs, or gratuitous "dear me!".

There was an alternative line of play.

At trick three cash the top Hearts (discarding ♣8) then play all the Spades, watching for ♣K. When that does not appear on the last Spade you pitch ♣Q, then play all the Diamonds. This line will be superior when LHO holds 3:1 in the Majors (show-up), and length in both Minors (LHO will have been pitching Clubs!). This might qualify as a triple "Vienna Coup" (cashing top tricks to set up the enemy honours as winners, then by the 'sadistic' squeeze, force them to jettison those cards!)