The Medford Chess Club invites you to its weekly meet-up in Medford Square. If the weather is favorable, the group will meet outdoors in the gazebo at the Saltonstall Building near the Medford Senior Center. If the weather is poor, the meeting place will be the second-floor gallery at the Charlotte & William Bloomberg Medford Public Library. The club has chess sets, chess clocks, and helpful members who are willing to teach you the rules if you're new to the…