Crossword clues for Blue opponent 4 letters:GRAYBlue opponentGRAYBlue's opponentKASPAROVDeep Blue opponentCSAThe Blues' opponents: Abbr.GRAYSBlues' opponentKASPAROV1996-97 Deep Blue opponentORIOLEBlue Jay opponentKASPAROVDeep Blue's opponent in chessGRAYSBlues' war opponentKASPAROVDeep Blue's opponentKASPAROVOpponent of Deep Blue, IBM's chess computer