I hadn’t heard of the piano puzzler before. Listen to the piece. It’s in the style of a composer you are supposed to name (easy part, at least in this one), but it’s a song that has been put into that style and you are supposed to name the tune. Since I didn’t know what I was supposed to do I didn’t know I was supposed to be hearing a song. But I’m not sure I would have been able to name it even if I was given the instructions. After the piece is played you’ll hear the contestant, the pianist, and the radio host (?) and you’ll get the answer when the work is replayed a bit with the emphasis on the song.