1. A good gamble?

This produced a plethora of different results at a recent pairs event. Being vulnerable, only two Souths opened 5♦ and one North raised to 6♦ and the other sensibly bid 6NT to protect his Club King. The remaining Souths all opted for opening a 'Gambling 3NT', which sometimes was raised to 6NT by North. Not one West found the fatal club lead. On a heart lead against 6NT, declarer wins with the ten, runs all the diamonds and West is squeezed in the majors for thirteen tricks.