It has been said that “everything in the WBCA rules is based on something that once happened to Walter Browne”. I don’t think anybody should worship the great god of a defunct organization.
If you want to allow a promoted pawn to remain the board, and continue to move, check, checkmate, and stalemate as though it were a queen, I suppose that is OK – as long as either player has the option, at any subsequent move, of physically exchanging the pawn for a queen. This option, I suppose, would have to include the right to pause the clock if necessary in order to search the tournament room for a spare queen.
As for underpromotion, the suggestion that the unexchanged pawn is automatically a queen unless specifically verbalized otherwise by its owner, could lead to serious problems. What if the promoting player mumbles “rook” under his breath, perhaps in a strange language nobody else in the room has ever heard of, and the opponent doesn’t hear it? Six “rook” moves later, when the position appears to be stalemate, but isn’t because the promoted piece is a rook instead of a queen, all hail could break loose.
All these desperation blitz rules, both those now on the books and those proposed, stem from the lack of a 2-second delay. I will never play in such an event. I would be happy, however, to play in a quick-rated event with a time control of G/6 d/2 (or G/5 d/2, if allowed), using quick-rated rules.
In the 4th and 5th edition rulebooks, “blitz” meant a 2-second delay by default, and there was none of this capture-the-king and illegal-move-loses nonsense. In recent years the term “blitz” has been hijacked to specifically include the nonsense, and this verbal-promotion stuff is just another example. It goes with the territory, I guess.
Bill Smythe