I was wacthing a end match, both players had clocks, one of them have a king and a rock but he couldnt give the other  mate and his time went down......Like the opponent with a only a king had more time he was the winner or not???? .the result was stalemate why???

what chess rule was  put in practice?

thanks.

Stalemate happens when you trap someones king and they have no leagle moves.You cant make a king move into check. As for the time , if you run out of time you lose.It was probaly a draw because you said "He could'nt put the other in mate".

You don't have to be able to force mate to win, but you have to be able to give mate against the worst possible play.  For instance, if the side that lost on time had the Rook, and the other side had even a Knight, he could claim the win because it is possible:

If the clock runs down normally the person out of time wins but if there is no possibility of checking the king then it is a stalemate.

Stalemate is a specific type of draw.  Not all draws are stalemates.  Sounds like a draw by insufficient material.

thank at all to the comments!!!

some one wrote that the stalemate is a type of draw...what is the different between draw and stalemate??

There are other ways to draw. 50-move rule, threefold repetition, by agreement. So not all draws are stalemates, but all stalemates are draws.

also if one side only has king left and the other side's time runs out its a draw too because a king isn't enough material for mating.