lamford, on 2016-April-17, 03:55, said:
[...]
It is the same as the hand at a North London Club where someone gained by leading low from KQJx, even though a WBFLC minute specifically allowed him to do so (his partner had the ace as an MPC).
I think that a clarification here is in order:
(First of all, if there is a typo here and the player was not leading but rather was following suit to a card led from the declaring side then he is certainly free to play his low rather than one of his honours in that suit. The fact that his partner eventually must play his Ace is AI)
When a player has the lead while his partner has MPC then we have three alternatives for the choice of which card to lead:
1: Declarer requires a lead in the MPC suit: The player may not choose which
card to lead from the knowledge of the (no longer) MPC.
2: Declarer forbids a lead in the MPC suit: The player may not choose which
suit to lead from the knowledge of the (no longer) MPC.
3: Declarer leaves the lead free: The player may not choose which
suit to lead from the knowledge of the MPC, but he is free to choose which
card in that suit to lead if he (legally) chooses the MPC suit. (The fact that his partner then must follow suit with his Ace is AI.)
lamford, on 2016-April-17, 03:55, said:
It was agreed by most that we then compensate the non-offenders for use of UI, or apply Law 23, it mattered not. In this case, I think we compensate the non-offenders by applying Law 23. It is clear that anyone checking up to see if his partner has made a mispull could benefit from a remark or comment. Therefore we adjust. This does, not conflict with Law 25A or its footnote in the slightest. We could instead apply Law 73. Does anyone really want to play bridge where someone can cheat by asking his partner if he really meant to make that bid and get away with it?