KANSAS CITY, Mo. – Inside the 39-acre grounds of the sprawling Arizona Biltmore resort, a large chessboard sits in the manicured grass. It comes complete with black-and-white pieces the size of Saint Bernards.It’s an appropriate metaphor for how Andy Reid and Eric Bieniemy will strategically shift their offense this season. How the Chiefs use Patrick Mahomes as the queen on their board, the piece with the most ability to hurt opponents, figures to change.A PM 15 update per Patrick Mahomes IG. #Chiefs pic.twitter.com/C2kA5q3Syu— Harold R. Kuntz (@HaroldRKuntz3) March 25, 2026Mahomes is rehabilitating from Dec. 15 surgery to repair both the ACL and LCL in his left knee. It’s the most significant injury of his career to date, something that muddies how quickly he can return to form.What’s more, Kansas City just signed the top running back on the free-agent market, Super Bowl MVP Kenneth Walker. And Walker is more of a knight than a bishop.…