Today, when I was playing end game I had a queen, a rook and a king (no pawns). My opponent had just a queen. It was his turn (the board was pretty blank) and he started giving continuous checks. I tried to bring my pieces to defend the king but couldn't stop.
After sometime he claimed for a draw and argued that otherwise this would continue for ever (positions were not repeating, but still). I agreed.
Is there any way to defend in such cases or is the match just over? Even, is it fair that though we have a good lead the opponent is forcing a tie? What would be the result if such thing happens in GM game?