3.25" King Arthur Chessmen are fabulous! Be gone those bland Staunton pieces and a nameless King! A true fantasy collector's dream set!
A guide to which opening you should play in chess (x-post /r/chess) : coolguides
// a half finished game of chess left somewhere (maybe at the park) or they find it somewhere unexpected; and maybe she moves a piece and when they come back someone has moved another piece and it eventually reveals something in the chess board or somehow it correlates to a map of the city and its clues or idk (and the guy moving the pieces, if someone is moving the pieces, is the one who was following her)