This deal is from a first division match between St Titus and Grasshoppers. In the first auction St Titus bid to a grand by a two over one game forcing sequence. After spades had been agreed with the bid of two spades there followed a long sequence of cue bids which established that there were first and second round controls in the minors and a first round control in hearts, East had sufficient extra strength with the spade and club queens to make a grand slam try of six hearts. West was happy to accept this with extra spade length and good distribution.
In the second room Grasshoppers had an Acol auction. After Roman Key Card Blackwood East showed one key card, West asked for the trump queen with five diamonds, East showed that he had the trump queen and either the club king or the kings of diamonds and hearts with his bid of six clubs. West did not know which holding East had so asked in hearts but East was unsure how good the singleton in partner's suit was and wasn't sufficiently confident to bid the grand.
On a diamond lead against the grand declarer won the ace, played the ace of hearts and ruffed a heart, then a club to the ace and another heart ruffed high. Now the king and queen of clubs were cashed throwing hearts, trumps drawn and thirteen tricks made. This board helped St Titus to their best league win of the season.