Before you lead a card from a side suit and have not drawn all the trump cards – it is extremely helpful if you are aware of the probabilities (the odds) of your card being ruffed by the opposition
How do I Calculate the odds of one of my side suit winners being trumped
Sometimes you are in the position of need ing to play a side suit winner before you have drawn out all the trumps. Usually this will be either in order to reduce your trump length as holding long trumps is a disadvantage when an opponent holds a trump honor and can draw two of your trumps by playing only one of his own, or when performing a trump endplay. Anyway you may or may not wish to have this card trumped.
|Cards Opposition holds||vs. Rounds Played in the Suit|
Table: The Odds of Being Ruffed compared to how many rounds of that suit have been played