billw55, on 2012-September-11, 06:12, said:
But in my own mind, I doubt I will ever stop believing that saying "you get a heart" verbally, out loud, with full intent of ops hearing it, is functionally identical to placing the ♥J on the table. To me, the proper chess analogy would be claiming a difference between speaking the words "I resign" and laying down one's king.
Fair enough, but change the situation to one where declarer has
♠9,
♥AKQ in hand with only side cards on table and claims 3 tricks thinking that a higher trump is out. Now it is impossible for declarer to lose the 4th trick and an offence for the defenders to knowingly accept it. This is functionally equivalent to the checkmate rule - in effect the hand is already over.
billw55, on 2012-September-11, 06:12, said:
It gets worse too. I don't think much of allowances for mechanical error. "Oops, I pushed my g-pawn but I meant to push my f-pawn. Mechanical error, I can retract and substitute."
The chess equivlent here is touching a piece accidentally, for example brushing against the king when reaching for the e pawn. There is no requirement to move the king in this case, although some unethiocal opponents will try to enforce it. The same with reaching for the 1NT card but laying down 2
♣ because 2 cards got stuck together. It is accidental - you should feel free to retract it.
billw55, on 2012-September-11, 06:12, said:
And don't get me started about providing written defenses. "Sorry Mr. Nimzovitch, you cannot play your new line without providing a suggested defense to your opponent in advance, in writing." LMAO.
Yeah, this one really does not have any chess equivalent. An example - I used to play an unsound Nf5 sac line of the Yugoslav Attack against the Dragon. Since it was not in their opening preparation I never had a single opponent actually take the knight. With a written defence they would clearly accept it! Perhaps it is best (most diplomatic anyway) to say that this difference reflects that chess is a full information game while bridge is not.
Worse than this is system regulation. "Only opening moves of e4 and d4 are generally allowed. If playing in a national level event you may also open c4 providing that this is pre-alerted to the opponent and written defences prepared that lead to at least a draw for black in all possible variations. No other opening moves may be made - if any other opening move is attempted this results in an immediate win for black."