The defense cashed four diamonds on which dummy parted with two hearts but declarer a club. West switched to a spade for the king as declarer advanced and passed the nine of clubs to the queen. The contract drifted down one since East was entitled to the rounded suit aces, N-S -100. Double-dummy, declarer might have succeeded in bringing home the contract by running the ten of hearts through East and later guessing to play a club to the king.
East was in a difficult spot when North responded to the minor suit opening. A 1NT overcall would conventionally have been Sandwich for takeout, revealing 5-5 in the unbid suits. A takeout double was a possibility but his pattern was very unappealing for this action. He elected to go quietly because partner could hold few values. If he offered a takeout double, South's 1NT rebid would similarly have ended the auction. E-W own an eight card diamond fit but the two-level would have been a notch too high. Declarer should lose three spades, two hearts and a club to finish one in the glue.
His silence on this deal at least earned his side a modest plus score.