There is a lot of discussion dedicated to which card should be led on the first trick. In general, the answer depends on factors such as what cards are held (both the length and texture of each suit), the final contract, how the auction went (fast or slow, confident or doubtful, information about opponents' and partner's suits), partnership agreements, and opponents' playing styles. In discussing opening leads, it is useful to make the first distinction between defense against notrump contracts and against suit contracts.