Partner opens 1D and east overcalls 1S, respond 2H with 10+ points and a 5 card suit 2H, partners responds 4D denying support for your suit.
Acol Bidding
East opens 1S overcall 2H with 10+ points and a 5 card suit 2H, partners response which denies support for your suit. You don't have enough points to do a takeout double.
Plan Before You Play
Dummy goes down AC, AS and AH losers for sure maybe QD as well. Draw trumps and run the heart and club suits.
The Play
Lose to the first spade win the second, finess the QD to be in wests hand (it isn't) ruff the spade return, lead a low heart from hand to dummys queen, lose to the AH, win the heart return with the KH discarding a club from dummy; lead out JH east overruffs ; duck the AC return ; ruff in dummy the next club return ; Lead out trumps.
Comment
You are in diamonds, unless the defense mess it up you can only make 8 tricks so you are light vulnerable. The opposition can make 2S - or you can make 2D or 2C a 4-1 diamond trump split ruins your game.
The above commentary is intended as a guideline only. As with any Bridge hand there are many ways to bid and play any hand.