a) You have a normal enough auction 1NT-3NT, and West leads the queen of spades and East will follow with the four. Sadly, the move is called and you, as TD, have to find the best line, and adjudicate the result of the board. What is the best line and its approximate chance of success?
b) Two conservative bidders have the auction 1NT(10-12)-All Pass, against two robots, and again West leads the queen of spades. East would follow with the four, but declarer claims seven tricks (against two robots) at trick one. The robots will accept the claim if there is a 100% line for the contract. Is there?
c) Two aggressive bidders have the auction 1NT(15-17)-(Pass)-7NT-(All Pass) and again West leads the queen of spades. East would follow with the four but again the move is called. GIB adjudicates the result of the hand as 7NT=, so there is no defence. What is the exact layout of the East-West hands?