When there are five cards missing in a suit, they will split 3-2 two thirds of the time and 4-1 only one quarter of the time. However, good play requires us to try and overcome the 4-1 splits when we can. If not, it is good to handle the 4-1 split at one side even if the other cannot be.
The auction here started with a weak two and South made a take out double. North’s 3C bid showed 8-11, or so, points since weaker hands would respond with a Lebensohl 2NT. When South shows a strong hand with 3H, the auction is game forcing. North has already shown his values and is content to just raise to game. After a keycard enquiry, South bids the grand slam even though he can’t see the 13th trick. Maybe he added a king for his good play or for the bad defence but players like bidding grand slams! West led the S8 (MUD) and South won with the ace. Twelve tricks are in view and it is a question of whether to play for the clubs to be 3-2 or 1-4. How will you play this? Both vul, Dealer East
After drawing two more rounds of trumps, declarer saw that it would cost nothing to cash the king and queen of diamonds before touching clubs. When East showed out on the second diamond, he was then known to have started with 2-1 in the red suits. As the bidding and the lead suggested that East did indeed have exactly six spades, he began with a presumed 6=2=1=4 shape. So declarer played a club to the ace and a low club back towards his hand. When East produced the five of clubs declarer played the nine of clubs from hand and thereby made his contract. If East had followed to the second diamond then declarer would have known that only West could have had four clubs and would accordingly have started the suit by playing the king and queen of clubs. This would have brought home four tricks when clubs were 3-2 and also when East had a singleton jack or ten of clubs.