With a certain spade loser, you must somehow avoid a diamond loser. How?
Your best bet is to try to strip East of clubs and hearts, toss him in with a spade, force a diamond return, and then get the diamonds right. In order to do this you must find East with
a likely three hearts and a 3=3=3=4 or a 3=3=4=3 pattern. (No writing in to mention that East might have a 3=3=5=2 pattern. That places West with seven hearts and six clubs. Please.)
Start with a heart ruff, club ruff, heart ruff, club ruff, heart ruff (yes, you are ruffing your ace) and ruff dummy’s last club. Assuming East has followed to everything and does not have a fifth club, cash the ♠K and exit a spade. Regardless of which diamond East leads, your percentage shot is to play for split honors. A strong East will normally lead an honor from any three-card holding. If East started with four diamonds, you can’t go wrong because West started with a singleton.
If East started with five clubs and two diamonds, you can’t exit with your last spade as East will cash a club. You are reduced to playing East for the ♦Q J doubleton. You hope it won’t come to that.