Answer: kasparov

AnswerCrossword Clue
KASPAROVOpponent of Deep Blue, IBM's chess computer
KASPAROVDeep Blue opponent
KASPAROVDeep Blue's opponent
KASPAROV"How Life Imitates Chess" author Garry
KASPAROV2008 Russian presidential candidate
KASPAROV"How Life Imitates Chess" author
KASPAROVDeep Blue's opponent in chess
KASPAROV1996-97 Deep Blue opponent
KASPAROVOne of 1 Across's successors