From the Middlesex Congress Swiss Teams in December.
This was the deal following the one reported on Christmas day, so consecutive grand slams - a rare occurrence.
The auction at our table was as below. 4NT was intended as Roman Key Card Blackwood, but East thought it was quantitative since West could have raised hearts to show support and force to game. East with extras leapt to six notrump, West decided to bid the grand now. This is a very good slam. So long as the trumps are not breaking four-nil, then it needs a four-two or three-three spade break or a two-two heart break or the club finesse. All this works out at well over 80%.
This grand proved more difficult than last week's with only four of 48 pairs bidding it.