These hands, boards 10 & 14, illustrate a technique called Sacrifice Bidding excellently carried out by Richard & Richard.
Sacrifice Bidding is frowned on by all the bridge writer gurus -who will however admit it has it's uses!
The boards brilliantly demonstrate when it can be used -and what you need to do to counter it.
I have illustrated the points using the travellers, the boards themselves can be found beside the Scoresheets.
On both boards the stuation was a fight out between two unequal pointed but long suited hands.
Each hand had the same shape, lots of trumps in E-W suits but very little in the N-S suits, in these cases voids or singletons, and vice -versa.
Inevitably one side pushed the contract, but then had it stolen by the higher ranked suit.
Correctly, and probably smugly, the losers doubled, knowing they would get the stealers down
But the stakes are higher than you think.
For the lower ranked doubler it is serious because they (and everyone else) can make the contract easily, (actually clocking 680).
This means they have to get the stealers down by 680 points on Board 10, and 420 on board 14.
The situation in both case needs some really serious and intelligent defence.
On board 10 doublers must first double then keep stealers score down to 8 tricks to make a score of 800 for you and a top.
On board 14 doublers again need to keep stealers score down to 8 tricks to score 500, and a top
Neither suceeded and the "Stealers" managed to take two very well deserved tops.
So the lessons are obvious.
Both sides need to count how many tricks they and their opponents will make. If stealers think that even doubled they can make enough tricks to prevent your opponents coming top, press on.
Defenders, when stolen from, you must double and then concentrate very hard to get them down by the same margin you would have scored if you had played the contract.
This is even more important if your estimate of your contract was that everyone else in the room would get it!
For the stealers one final word. In your estimate of whether sacrificing and being doubled will profit you, watch the vulnerabilty!