I can't work out the difference in play that leads to this generosity. Slightly different order of playing trumps before leading the King of diamonds is all I can see. Trick 4 is when the contract is surrendered
Name of lucky recipient has been anonymised to protect the innocent
I find it remarkable, under any circumstances, that one of the sims would show not coverng a King with an Ace was profitable - planning to use it next time round i guess