Chessboard

Dad found a chessboard in the room. Each square has a stamp on it that shows a letter of the alphabet. According to Puzzlemaster Sandor, the following tactics will not come into play in solving the chessboard puzzle: He added that the solution was actually much simpler, and that there was additional information that was needed to solve the puzzle.
 * Morse code
 * Chess cipher
 * Knight’s tour
 * Stamp color
 * Letter distribution

On the 5th and 6th videos, several pieces were covering up some of the letters. These letters spell SAN FRAN.



San Francisco Chronicle
The bar codes (and SAN FRAN) point to the white pieces featured on the board in the chess column in the March 30, 1981 edition of the San Francisco Chronicle. The Chronicle’s online archives only go back to 1985, so the next step involved looking up the Chronicle’s back issues on microfilm at the library. When matched up with the white pieces in the column, the chessboard in the room revealed seven letters: SEYMOUR.

Dad typed SEYMOUR into the keyboard, and one of the menorah lights turned on!

Theory
See Night 2 Gift Barcode.