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 ...

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 ...

Jamie Yuccas is a CBS News correspondent based in Los Angeles. Yuccas joined CBS News as a New York-based correspondent for CBS Newspath in August 2015. Her reporting has been featured across all CBS ...