A change to the scoring of the fourth and subsequent non-vulnerable undertricks, from 200 each to 300 each, was made in 1987 after a hand in the finals of the 1981 Bermuda Bowl. Munir Attaullah and Jane Alam Fazli, playing for Pakistan, reached a vulnerable 7 contract, which would have scored them 2210. But their non-vulnerable opponent Jeff Meckstroth, playing for USA, calculated that down 11 would cost only 2100 points and thinking he might do better than that, sacrificed in 7 on a weak hand with five spades to the jack; this was doubled and went down nine for a score of -1700. The 510 point differential resulted in an 11 IMP swing in his team's favor.