billw55, on 2016-September-19, 09:52, said:
OK, but this isn't exactly about playing from the top. It is about ruffing from the top, or bottom (in the two card ending per lamford). There is written guidance that suits are assumed played from the top; is there similar written guidance that assumes ruffing from the bottom? Or is that an unwritten assumption, or not assumed at all?
But the advice we have in England does not say that suits are assumed to be played from the top.
Quote
[WB8.70.5] Top down?
A declarer who states that they are cashing a suit is normally assumed to cash them from the top, especially if there is some solidity. However, each individual case should be considered.
Example: Suppose declarer claims three tricks with AK5 opposite 42, forgetting the jack has not gone. It would be normal to give them three tricks since it might be considered not ‘normal’ to play the 5 first. However, with 754 opposite void it may be considered ‘careless’ to lose a trick to a singleton six.
I would much prefer it if the rules stated that suits are always cashed from the top down, and tricks always ruffed from the bottom, or that they are played in the least favourable order for the claimer. Under the current advice the TD is told that at some suit-length, or some value of highest card, or some size of the gap between the cards, bottom-up ceases to be irrational. No-one knows where to draw the lines, and each TD will draw them in different places.
Vampyr, on 2016-September-19, 07:52, said:
Mine do. I do not believe I have ever played the low trump first; also these claim threads have caused me to carefully cultivate the habit of always playing suits from the top, hoping that partners can testify that I do this unfailingly! However, though I think that my opponents will play the high card first I will observe them.
This won't help you, because the TD will base their judgement on what "players" do, not on what you would do.