South guessed right by putting up the king and discarded a club.

South led something from the dummy and discarded his last club.

He played diamonds, and South discarded a heart on the third round.

Later, South discarded a diamond loser on the heart queen.

South has discarded a heart and a diamond on the spades.

He led the club queen, and South discarded a heart.

South could have discarded his club loser and taken the rest without difficulty.

South now led the club nine and discarded when East played low.

If he had led the diamond king, South could have discarded a heart from the dummy in safety.

South must call for a heart, and then discard a club or a diamond from his hand.