If you have an old chess set that's missing pieces, don't rush to throw it out yet. Instead, turn it into this functional and ...

Blue Prince features layers upon layers of puzzles, and not all of them are required to beat the game. As you explore both the Estate and the Grounds around it, you may encounter a puzzle involving ...

Duolingo launched a beta version of a chess course on Tuesday, April 22. The new, free course teaches users how each chess piece moves through short puzzles, lead by the app's in-game chess coach ...