The diamonds were not evenly divided, since East had bid the suit.

East doubled two diamonds rather than bid his hearts, and three no-trump was reached.

There was reason to think he had four spades, since East had not bid the suit.

East could have bid six diamonds, expecting to succeed opposite a solid diamond suit.

East should surely have bid one heart, and South missed an opportunity to try three spades.

East again bid hearts, and West again led the ineffective heart jack.

If East had bid two hearts, what would have happened?

At any other vulnerability, East would no doubt have bid more.

But if two diamonds was understood as a transfer, East should have bid three hearts, showing a good heart fit and a maximum hand.

South ruffed and asked himself why East had bid five no-trump.