blackshoe, on 2017-August-22, 09:09, said:
When we get case-law then it will be easier. If I may expand:
In a normal auction there are going to be a series of final contracts - some of which may be good ones that go down, some will make - with overtricks possibly.
If a pair reach a high-scoring contract which they would not have reached without the recourse to a comparable call, then we adjust the score. To illustrate (EBL simulation)
This shows the final auction. The initial auction went.
1D :: 1S - i.e. West bid before South (1D = better minor - 1NT = 12-14)
North was offered th eopportunity to accept the call and refused: the call was cancelled and South overcalled 2C: West bid 2S which was accepted as a comparable call (I agree - even if 2S by agreement showed 5 spades, since a hand showing 5 spades and 9-12 points is a subset of a hand showing 4+ spades and 6 - 14 points)
Because West bid at the 2 level (most people wouldn't - they would probably double, but this might not be a comparable call) EW got into their 23 point 4-spade contract.
Without the assistance of the comparable call the auction would probably have died in 2 Spades (A double would normally show a weaker hand than West is showing)
Thus we decide what is likely to have happened - if some pairs bid to 4S but most did not then we would weigh the final result as e.g. 80% NS -170, 20% NS -420.
No matter how well you know the laws, there is always something that you'll forget. That is why we have a book.
Get the facts. No matter what people say, get the facts from both sides BEFORE you make a ruling or leave the table.
Remember - just because a TD is called for one possible infraction, it does not mean that there are no others.
In a judgement case - always refer to other TDs and discuss the situation until they agree your decision is correct.
The hardest rulings are inevitably as a result of failure of being called at the correct time. ALWAYS penalize both sides if this happens.