Just thought you might be interested in an anecdote taken from Bronstein's '200 open games' published by B.T. Batsford Ltd (London). In this book Bronstein describes his meeting with Dus-Chotimirsky in the Moscow match 'Locomotive' against 'Dynamo,' as follows:
'It is commonly thought that chess is a game for silent people.
As soon as my opponent had played 2 P-KB4 (after 1 P-K4 P-K4) I suddenly heard an angry, "And I'm having no refusal! Accept the sacrifice! If you don't take the pawn I won't continue the game."
There was nothing I could do. I accepted the old maestro's gambit.
Several moves later Dus-Chotimirsky played a hurried move, and whilst I was considering my reply, decided . . . to change his move!
The spectators gasped, the judges wanted to stop the clocks, but Fedor Ivanovich suddenly shouted at everyone, "What on earth is this? Look, I made a bad move, and now I'm changing it for a good one. Rules, you say? To hell with your rules, this is chess! Besides, you don't object?" said my opponent, turning to me.
"Please, it's my pleasure!"
And the game went on as if nothing had happened.'
(p.s. Bronstein won his game against Dus-Chotimirsky, the Giant-killer who had defeated the two men kwho tied for first at the great St. Petersbury 1909 Tournament, World Champion Lasker and Russian Champion Rubinstein).