PhantomSac, on 2014-September-12, 16:34, said:
The general theme is that LHO should keep 3 with 7 diamonds and 1 diamond with 6 very early if they want to be perfect.
Sigh! I fear I will never be a perfect defender - it is just too difficult.
Of course, if I do ever get to the stage of coming down to 1 diamond very early with 6, I will probably find that declarer had 3 all along and now knows he can duck one safely....