4[Spade]—10 3 N.T.—6 4[Club]—1
Partner has invited game and, with more than a minimum and a fit for his clubs, you should accept. Bidding the game in no trump would be a mistake, for partner is certain to have a weak holding in at least one of the red suits, and the chances are you will not be able to run nine tricks immediately. Four clubs can get you to four spades but may tip off the opponents to the best defense.
4[Club]—10 4 N.T.—8 3 N.T.—6 4[Spade]—3
In view of partner's strength-showing jump raise you have far too good a hand to be satisfied with a conservative bid of three no trump. The information that you have the filler for his club suit, plus a good hand, may be all that partner needs to proceed toward slam. Three no trump gets a higher award than four spades because there is a good chance that partner will bid again and give you another opportunity to move in the slam direction. Four no trump, the Blackwood inquiry about aces, should get you to slam if partner has the three aces you are missing. However, even then you can't be sure you want to be in slam opposite three aces, or out of slam opposite only two.