The next defense came against Elena Akhmilovskaya in Sofia in 1986 , and Chiburdanidze won the match by 8 Â 1\/2 â `` 5 Â 1\/2 . The next defense came against Elena Akhmilovskaya in Sofia in 1986 , and Chiburdanidze won the match by 8 Â 1\/2 -5 Â 1\/2 .