Law 41A requires the defender on the presumed declarer's left to make the opening lead face down. It is important that the opening lead be made face down.
At this time, the leader's partner and the presumed declarer each may require a review of the auction or request explanation of an opponent's call. Occasionally an auction may be re-opened under Law 21 Call Based on Misinformation.
A faced opening lead by the wrong defender gives the presumed declarer an advantage.
By accepting the lead he can choose whether he or his partner plays the hand perhaps now concealing the strong hand or simply getting best value from the "though weakness and up to strength" principle. Acceptance may allow the stronger player to become declarer in a difficult contract. By requiring the lead from the correct hand, declarer may be able to use his options under the Major Penalty Card laws to improve his result.
Jan Peach
QBA Director Accreditation
Article Posted: August 19, 2009