Fivebyfivia Delenda Est

It's an interesting mixture between chess puzzles and interactive fiction, mostly leaning towards the chess side. You essentially have to use different sets of pieces to set up a checkmate to an enemy king, but you have to move in a 5x5 region as a knight and you only have a limited amount of time to do so.

I like chess, so I enjoy this. It's not your typical interactive fiction story-game, but it's still a creative idea/mechanic.