Scientific way to 7 clubs
(Page of 3)

This is a beautiful hand because it contains also a very descriptive slam auction and also a nice declarer play. Let's say you pick North's cards below and you are surprised by Partner's 1 natural opening ! Wow, small slam looks very possible and maybe the grand too... You start with a conventional  2 GF bid and Partner respond 2 natural, meaning he has at least 5-4 clubs+spades and a minimum opening (no surprise...). You relay in 2NT asking for more info on the distribution. Partner bids 3 meaning he is short in this suit! So he must be 4-1-3-5 or 4-0-4-5 or 4-1-2-6 or 4-0-3-6 and minimal. OK, you bid 4C confirming clubs as the trump suit and show also slam interest, since you didn't signed off in 3NT or 5. Partner cuebids his A  in 4 and you decide to bid 4NT Key Card Blackwood. Partner respond 5 meaning two key cards and the trump Queen! Very nice, you know for sure now that he has the A, K and Q!. So you decide to try to make the grand slam, bidding 7. West as expected leads a trump.

West
K10942
J83
96
743
North
A
AQ1054
KQ3
AJ95
East
J73
K9762
J1085
8
South
Q865
A742
KQ1062
W
N
E
S

1
P
2
P
2
P
2N
P
3
P
4
P
4
P
4N
P
5
P
7
P
P
P
D
7 South
NS: 0 EW: 0

Now the auction was beautiful and South's hand was an open book for you. Now you switch places and get in South's shoes as declarer and plan the way to 13 tricks. Top tricks you can count on: 5 clubs + 3 diamonds (4 if they behave )+1 spade + 1 heart = 10 tricks. Still 3 tricks short... OK the distribution allows you to ruff some losers but what to do ? Draw trumps ? No way, it's a dead end! Theory says to use the trumps in your shorter suit to ruff and try to establish the other hand. In this case that would mean to ruff three spades in dummy. Let's see if this is possible, because you need also a way to circulate between dummy and you, don't forget! Say you win the first trick in dummy, play the A, get in hand with the A, ruff a first spade, ruff a heart to get back to hand, ruff a second spade, ruff a second heart and now you ruff your last spade in dummy. The picture looks like this:

West
K
J
9
74
North
AQ10
KQ
East
K9
J108
South
742
KQ
D

But you are in dummy and what can you do to come in hand and draw trumps ? Nothing ! West has two trumps and will ruff a heart or a diamond for down one. Hmmm, maybe it's not your lucky day after all...  But what if you do exactly the opposite ? Meaning ruff the hearts in your hand and establish the dummy (it's called reversed dummy technique)?

Let's see: You win the lead in dummy, ruff a heart, go back with a diamond to the Queen, ruff a second heart, go down again with a diamond to the King an ruff high a third heart. The table will look like this:

West
K10942
74
North
A
AQ
3
AJ5
East
J73
K9
J10
South
Q865
A7
K
D

Now it's a child's play: spade to the Ace, Queen of hearts ruffed high and a spade ruff will take you in dummy, you draw the two remaining trumps and claim for a well deserved grand slam !

So remember always to make a plan before touching the first card from dummy!  What I consider special about this hand is that it can be considered in the same time an example of very good card reading (by North) and a quite safe 7 bid and a nice declarer play (reverse dummy) executed by South.