lamford, on 2018-February-22, 17:13, said:
So what would you say was meant by "not permitting normal play of the board?"
There are some specific examples, like 15B2, where you're playing the wrong board and one of the players has already played that board. I can't find the law number at the moment, but I think there's another one where a pair is at the wrong table, they start bidding the hand, and the error is discovered, so the play is cancelled. When the correct pair is seated, we start the hand over, but if any of the calls are different we cancel it and award an adjusted score.
The general idea is that a board is unplayable when there's so much extraneous information that it would be ridiculous to try to play it. But if the Laws provide a rectification that doesn't include cancelling the board, that
is the normal play of the board after the irregularity.