I also feel it is better to play a game to the end. If the "winning" player is bored? with the game then they can choose to resign themselves. But,to ask an opponent to resign seems presumptuous. The tables can turn if a mistake is made by the one who thinks they inevitably will win. There is a chess player who requests that his opponent resign whenever he captures their Queen first ! That seems to be 'jumping the gun' a bit and being rather short-sighted. If someone is ahead in Amazons or any other game and is bored with playing they always have the option to resign. But to ask another to resign seems to be poor etiquette.