IMPs Pairs, OKbridge
Dlr: North
Vul: Both 
                                    north

                                    S KQ102

                                    H KT3

                                    D T5

                                    C Q853

    west                                                    east                        west     north     east     south

    S J954                                                S                                        pass      1H!    1S

    H 5                                                     H Q872                  1NT!   3H!       4D     4S

    D A843                                              D KQJ76                5D      all pass

    C K974                                              C AJT2

                                    south

                                    S A8763                                         

                                    H AJ964

                                    D 92

                                    C 6

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

1NT: asking to bid

4D: 5+ diamonds, exactly 4 hearts, distributional extras

5D: both 4S and 5D likely to make with presumed distribution of East 0-4-6-3