Simplify the following text for a Grade 7 native English-speaking person.
Original: Against Garry Kasparov , Miles had little success , not winning a game against him , and losing a 1986 match in Basel by the overwhelming score of 5 Â 1\/2 â `` Â 1\/2 .
Simplified: Against Garry Kasparov Miles had little success , not winning a game against him , and losing a 1986 match in Basel against him by the overwhelming score of 5.5 â `` 0.5 .