3 © and 3ª bids in response to 1 No Trump openers show a good five or six card suit and HCP sufficient to invite slam.

Opener, if interested in slam, should then cue bid Aces up the line.

 
N E S
1NT P 3 ª" 3 ª = * I'm 5+ in Spades with a big hand "
3NT 3NT = " Not this time, South
North South
ª xx ª AKQJxx
© AQxx © KJx
¨ KQx ¨ Jx
§ KJxx § Qxxx

N E S
1NT P 3 ©" 3 © = * I'm 5+ in Hearts with a big hand "
4§ P 4¨ "I have the Club Ace with Hearts" "... and I have the Diamond Ace"
6 © "That's all I need to hear, South"
North South
ª Kxx ª Qxx
© Qxx © AKJxxx
¨ KQx ¨ AJx
§ AKxx § x