4 NO TRUMP
South's hand was a maximum for his bid of one heart. Had he held one more point in high cards, he would have opened the bidding with the strength-showing bid of one club. The opponents did their best to crowd the auction but the Italian methods are well prepared to cope with such preemptive tactics.
Forquet ignored the double of the cue-bid. His three-diamond call showed control of that suit. Siniscalco's four no-trump bid was not a Blackwood call for aces. The Italians use Blackwood rarely, and only where there is a jump to four no trump. In this auction, the four no-trump call showed additional values and told partner that he could not lose two immediate tricks in any suit. In return, South showed the ace of clubs, so North was able to jump to the slam.
Unfortunately, after West had won the first spade and shifted to the jack of clubs, Forquet tabled his cards. He thought that the hands included nine diamonds and that the lead of the ace would insure 12 tricks. As a result of this claim, he was not allowed to take a diamond finesse and so was set 50 points. The total loss—1,030 points—cost Italy eight IMPs.
It is interesting to compare the bidding of France with the bidding of Italy on another slam hand: