If the hand originally dealt to either player contains neither a king, a
queen, nor a knave (no picture card, in fact, whence the name), it entitles
the holder to score ten.
As soon as the player is aware that he has this, he is bound to inform his
adversary; and after the adversary has discarded, he is bound to show his
carte blanche by counting the cards, one by one, on the table.
The score for a carte blanche takes precedence of all other scores.