There is a company specializing in making hidden doorways or rooms in homes. One requires a chess board played in a certain combo to unlock. Posted on November 21, 2013 by admin There is a company specializing in making hidden doorways or rooms in homes. One requires a chess board played in a certain combo to unlock. VN:F [1.9.22_1171]please wait...Rating: 0.0/5 (0 votes cast)VN:F [1.9.22_1171]Rating: 0 (from 0 votes)