This deal is from the Swiss Pairs at the EBU Spring Congress.
John Holland reached three notrump after the above auction and West led the four of clubs.
This went to the eight, queen and ace. Next John played the ten of spades covered by the queen and king. He then cashed another top spade to find that the suit was running for six tricks. At this point he could have settled for eleven tricks. But overtricks are valuable at pairs, so he played a heart towards the king. When that held he claimed twelve tricks for a 96% board, making eleven would only have scored 40%. If the heart king had lost to the ace and East had the queen and ten of hearts and West had continued hearts he may have got a poor score but the risk was small and the prospect for a large gain was good.