Simplify the following text for a Grade 8 native English-speaking person.
Original: In September 2006 Korchnoi won the 16th World Senior Chess Championship , held in Arvier ( Valle dâ Aosta , Italy ) , with a 9 â `` 2 score .
Simplified: In September 2006 Korchnoi won the 16th World Senior Chess Championship , held in Italy , with a 9 â `` 2 score .