Related Clues:

• Homo sapiens
• Piece for Kasparov
• High-ranking clergyman
• Kasparov's front man
• He stands before the queen?
• Holiday honoree
• Date or age beginning
• Castle protector, maybe
• Dude
• Fischer's castle
• See 27-Down
• Certain board member
• King protector, sometimes
• See 34-Down
• The human race