user16063: I have only king left with two pawns but they are blocked. By how many moves an opponent has to checkmate me?

user7297: There is no such limit. In the official rules, §9.3, it is stated that there's a limit of 50 moves during which a pawn must move or a piece/pawn must be captured. If that doesn't happen, you can claim a draw.
I have heard that there are some circles a stronger limit is imposed when the weaker side has only a lone king (so, not two pawns), but those are unofficial rules and we can't say much about that.

16063: <p>I have only king left with two pawns but they are blocked. By how many moves an opponent has to checkmate me?</p>
 7297: <p>There is no such limit. In the <a href="http://www.fide.com/component/handbook/?id=171&amp;view=article" rel="nofollow noreferrer">official rules, §9.3</a>, it is stated that there's a limit of <strong>50 moves</strong> during which a pawn must move or a piece/pawn must be captured. If that doesn't happen, you can claim a draw.</p>

<p>I have heard that there are some circles a stronger limit is imposed when the weaker side has only a <strong>lone king</strong> (so, not two pawns), but those are unofficial rules and we can't say much about that.</p>
