There's no reason not to have a rule as to when the game can be declared a draw.
There are ways to reach a positions near the end of the game where a win cannot be forced and even more ways to reach a position where a player needs to take what might be deemed unacceptable risks to attempt and force a decision.
A 50 move rule without a capture seems a very fair rule.
(ocultar) Si te interesa conocer la evolución del torneo que estás jugando, puedes charlar con tus adversarios en el foro de discusión del torneo. (HelenaTanein) (mostrar todos los consejos)