Puzzle Duel is a Holiday PVP event that spans five days. You get 8 free turns each day, and when you Click on the Match button, you are paired with another player of a similar grade and compete in a match style grid game. The winner gets points towwards Grades. Ascending grades brings rewards, Playing, and Winning brings tokens that can be spent in the exchange shop.

Check out more at http://pnswiki.com