Posted 2006-September-03, 02:27
Lowerline has got part of the way. You do need I think Kxx ♠ or better and trumps 4-2. To make 10 tricks you need to score 6 trumps, 2 ♠ and 2 ♦.
From an entry consideration it is convenient to make the unnatural play of winning the ♥ switch in hand, crashing two honors in the process. The hand with Kxx ♠ must have no more than 1 ♥ left after the trump switch if we follow this line since we will only be able to draw one more round. If RHO has Kxx ♠ it follows he must have a 3316 shape. This is possible but there is a good chance he would have bid ♣s since he would be known to hold Kxx ♠ and at least KQJTxx♣ and possibly as much as AKQJxx♣. (winning the heart switch in dummy I think plays RHO for 3316).
If we give LHO Kxx ♠ this would mean LHO must be Kxx xx QJTx ???? and RHO Jxxxx xxxx x ???. So try win ♥A. ♠ ruff, ♣ ruff, ♠ ruff and now a ♦. If RHO ruffs, it's easy trumps are now 1-1 so ruff a ♣ return say, draw the remaining trumps and cash the three side suit winners. If RHO discards a cute ending develops we win the diamond ace, cash the ♥K, and cash two ♠. We are left with a losing heart, however, we can exit with with the fourth ♦ and when LHO wins he must exit with a club allowing us to score our small trump!
This hand is board 102 of the US trials final and LHO did actually hold Kxx xx QJTx KTxx !