When declarer calls for dummy to "run a long suit from the top" can he or she change suit before the long suit is finished? What is the law that covers this?
Law 46 Incomplete or Erroneous Call of Card from Dummy
8.46.1 Law 46: “Run the clubs” [WBFLC]
Declarers sometimes give an instruction to Dummy to run a suit […] without giving, as is
procedurally correct, a separate instruction for each card. A question can arise as to when the
second, or a later, card is played from dummy, since the Declarer is not able to stop play of the
card once it is played. The Committee ruled that the card is deemed to be played when Declarer’s
RHO follows to the trick.
However, the committee deprecates instructions given to Dummy in this irregular manner.
[WBFLC minutes 2000-01-12#6]
Suppose declarer instructs dummy to “run the clubs”. Declarer may change this instruction at a
later trick, and a card from dummy may be changed until declarer’s RHO plays to the trick. At
this point the card becomes played.
Comments
EBU White Book
Law 46 Incomplete or Erroneous Call of Card from Dummy
8.46.1 Law 46: “Run the clubs” [WBFLC]
Declarers sometimes give an instruction to Dummy to run a suit […] without giving, as is
procedurally correct, a separate instruction for each card. A question can arise as to when the
second, or a later, card is played from dummy, since the Declarer is not able to stop play of the
card once it is played. The Committee ruled that the card is deemed to be played when Declarer’s
RHO follows to the trick.
However, the committee deprecates instructions given to Dummy in this irregular manner.
[WBFLC minutes 2000-01-12#6]
Suppose declarer instructs dummy to “run the clubs”. Declarer may change this instruction at a
later trick, and a card from dummy may be changed until declarer’s RHO plays to the trick. At
this point the card becomes played.