[resolved]Beat the master but no achievement

[EE127]

I've beaten players in this game. Opponent's ELO change:662→645.
But I didn't get the "Master Killer"(Maybe it's not called that in English? I'm using the Chinese UI) achievement.
(In fact,A master player requires an ELO greater than 700.So I didn't beat the master player)

[Arrigo II]

Congrats for your win! But Master is above 700 Elo, not 650

[EE127]

Congrats for your win! But Master is above 700 Elo, not 650

Thanks bro, I got it.I didn't expect the ELO of the master player to be so high.