Oscar is here to check your chess skills in the newest Duolingo course since the app began offering math and music lessons. "Hola, ajedrez" means "Hello, chess" in Spanish. You've always been able to ...

The following content is brought to you by Mashable partners. If you buy a product featured here, we may earn an affiliate commission or other compensation. Get schooled by real grandmasters. Credit: ...

Add Yahoo as a preferred source to see more of our stories on Google. If you already know how each piece moves, then you'll play against Duolingo's character Oscar in mini-puzzles, wherein you'll have ...