IMPs Pairs, OKbridge
Dlr: North
Vul: Both 
                                    north

                                    S AKT2

                                    H KT9643

                                    D T5

                                    C Q

    west                                                    east                        west     north     east     south

    S J954                                                S  Q87                   pass      1S!      pass    1NT!

    H A                                                     H Q85                   pass      3H!     pass     4H

    D KQ3                                                D J76                    all pass

    C J7543                                              C AT82

                                    south

                                    S 63                                         

                                    H J72

                                    D A9842

                                    C K96

 

1H: 4 spades + 5+card side suit or 6+ spades, 10-14 HCP

1NT: asking to bid

3H: 6+ hearts, 12-14 HCP

4H: S can imagine "average" hand with 13 HCP: Kxxx-AKQxxx-x-Jx - only the heart lead makes the game unworthy