Saturday was a case in point in my own game, as White against Leo Tsoi (Warwickshire Select). After my 76th move (h7) and nearly six and a half hours play, the following position was reached:
Black now played 76... Rc8??, followed by 77. Rh3 Rh8. Leo had a clear win, which I'm sure most people will see. Not 76... Rc2+ 77. Kd1 Kxe3??, as the h-pawn will promote. Instead, of course, 77... Rh2!, which wins quickly.
The game continued for a few more minutes, by which time it was the last to finish. And it ended in a draw!