Looking through the 9 different puzzles from the 2015 Series 1 set, I came across one that didn't seem to have it's own card in the base set. The other 8 puzzles represent a pair from the 132-card set, but I couldn't find a card to represent the brown border puzzle. It's the classic mystery of "Who's on First?".
Here are the 9 puzzles of the 2015 Series 1 set as advertised on the back of cards #37b-45b.
Update: I found the card. It's Fat Matt from the All-Star insert set #8 of 10.