Over 2NT we play: 3♣ = Puppet, old standard variation. Have to go via 3♣ to raise to 3NT. 3red = transfer 3♠ = both minors, slam try 3NT = 5♠4♥ game values only 4m = natural slam try Not very sofiticated, I agree. But mostly it works out, eventhough there's definitely problem hands.