v. In touching a piece simply to adjust it, the player must notify

to his adversary that such is his intention.

[It is usual, in such a case, to say _J'adoube_ (I adjust); but he may not touch a piece with the intention of moving it, and then, when he discover his mistake, say, _J'adoube._ The phrase is simply intended to be used when a piece is displaced or overturned by accident.]