The two main-party candidates in the race for the Fairfax County Board of Supervisors’ seat in the key Braddock District have agreed to hold 10 debates beginning Sept. 14, their campaigns said Monday.

In a joint news release, Supervisor John C. Cook, the Republican incumbent, and Democratic challenger Janet S. Oleszek, a former school board member, said they came to agreement on the number of forums — which they believe could set a record for a magisterial district election — and on arrangements for the first two debates in September.

Carey C. Campbell, a former vice president of the Fairfax County Federation of Civic Associations who is running for Braddock District supervisor as an independent, will also participate in the September debates, the campaigns said.

Republicans and Democrats in the county are focusing particular attention on the competition for a seat that had been held previously by Sharon S. Bulova (D) before she became chairman of the Board of Supervisors.

In a notably collaborative effort, the candidates invited members of the community who might be interested in hosting any of the remaining eight debates. in October and November to contact both campaigns through their Web sites with proposed dates and hosts.

The campaigns will then review the proposals and decide which debates will go forward. The Cook campaign’s Web site is here. Oleszek’s is here.

Details on the first two debates after the jump ...

Details on the first two debates

Debate 1: Sept. 14, 7:30 p.m.; Braddock District Hall, 9002 Burke Lake Dr., Burke; hosted by Braddock District Council

Ninety-minute debate, featuring three-minute opening and closing statements and questions from the audience (through cards passed to moderator). Each candidate will have 90 seconds to answer.

Debate 2: Sept. 24, 3:30 p.m.; front Yard of Denny and Suzie D’Alelio, 4811 Woodland Way, Annandale (Corner of Woodland and Queen Elizabeth); moderator: Ellen Oppenheim*

Sixty-minute debate, featuring two-minute opening and closing statements, and questions from the audience (through cards passed to moderator) where each candidate will have 90 seconds to answer.

*Residents attending are encouraged to bring blankets to sit on.