One No Trump (2)

Dealer South, All Vulnerable

South	West	North	East
Bidding
1NT	No	2♣⁽¹⁾	No
2♦⁽²⁾	No	2♠⁽³⁾	No
No⁽⁴⁾	No

Explanations

⁽¹⁾ Another classic use of Stayman.

⁽²⁾ South denies a 4-card Major.

⁽³⁾ If South had shown a 4-card Major North would pass, but over the denial they bid their 5-card or longer Major, weak and "to play".

⁽⁴⁾ South knows North has no game interest.