Multi user wordpress toplist ranking

1. A Wordpress ranking app where Wordpress users are able to save their Top 3-100 games this year. While logged in wither from backend or with a widget in frontend. Search games by name using BGG API with AJAX autocomplete. Save choices by their BGG ID. BGG API [login to view URL] 2. Display the user toplists under the default Wordpress user pages (/author/x) with a dropdown AJAX year selector. 3. A page or widget to publish a yearly overall Top 100 toplist consisting of all the users toplists with games weighted in falling order (1=100 pts, 2 = 99 pts, 3 = 98 pts etc). One new toplist for each year. Previous years locked from editing. Using BGG game ID:s.