The Secret Solver tries to guess the right pattern of marbles, both in order and color that the Secret Maker has arranged behind the shield. Also known as Mastermind, and resembles and earlier pencil and paper game called Bulls and Cows that may date back a century or more. Handcrafted hardwoods artistically designed into unique heritage game boards. The woods are all their natural color so the beauty of the wood species is on display. A clear varnish finish is used to protect the wood.