Solution doubledummy problem 1

 http://doubledummy.net/Problem0001.html  take the heart in souththen take a spade with the ace discarding heart in north case 1: when east gives a small spadein this case take the club AKQ and heart A

 and then come south using clubsand then take the spade king and then give a spadewest only has diamondsnow, it is easy, get two club tricks and one diamond trick in north, and one diamond trick in south!! case 2: east gives a big spade!go north using clubs and pick the 6 club tricks and one ace of heart (by discarding a club of south on the ace of hearts)at this point north ka hand ye haiH 54D Q3now if east has discarded all hearts, then it is easyso, east has at least one heart 2 a) east has at most 2 dias, 1 heart, at least 1S2 b) east has 3 dia, 1 h, no spades in 2 a) south has Spade K , dia A 8 2in 2 b), south has spade K 5, dia A 8this is because the last discard, spade 5 or diamond 2 can be decided by south based on east's discard! so, in 2 a), north leads the queen of diamond, wins 2 dia tricks and one spade trick! in 2 b),   if west has only one diamond, then get one two diamond and one spade trick!if west has at least three diamonds, then get two spade and one diamond trickif west has two diamonds (and two spades) then north leads a small dia and takes it in south with the ace. Then, if west has the K dia, then give a diamond to west's king and then get two spade tricks in south, else get the K spade in south and Q dia in north.