German possessives such as mein, dein, sein, ihr, unser, euer and Ihr depend on two things: who the owner is, and the gender, number and case of the noun that follows. In each round you see a sentence with a gap and three cards: Whose? (the owner), the noun with its article, and the case. You choose the right form from four options; afterwards a short rule explains the ending (for example mein → meinen, meinem, meiner).
A1 practices the Nominativ, A2 the Akkusativ and B1 the Dativ; Mixed combines all three. A round has up to 10 questions, and you have 3 lives. The game is free, needs no account and keeps your progress in your browser.