Redskins owner Daniel Snyder has been appointed nonexecutive chairman of Six Flags Inc. by a unanimous vote of the board, the company said yesterday.

Snyder won the chairman's spot at a Wednesday board meeting called after Snyder, former ESPN executive Mark Shapiro and local builder Dwight C. Schar were voted onto the board earlier this week by Six Flags shareholders.

Snyder also wants Shapiro to replace Kieran E. Burke as Six Flags chief executive, but there was no indication whether the company's board had begun discussing that issue.

Snyder had recruited Shapiro from his job at ESPN to be a partner in his bid to gain control of Six Flags, and the two men waged a campaign to drum up shareholder support for their plan to turn around the theme-park company. They have both spoken of possibly building a family entertainment company. Shapiro remains chief executive of Red Zone LLC, the investment vehicle for Snyder's Six Flags shares.

Snyder and Shapiro yesterday said they would continue accepting bids on a potential sale of the company through mid-December, though it is unclear how high a price the new board might demand, given Snyder's announced plans to try to run the company and revive it.

"All directors are committed to continuing the sale process," Snyder said in a news release. The sale process was started by the Six Flags board after Snyder began his effort to get control of the company.

Final bids are due by mid-December, the company said.

Michael E. Gellert, who represented the board's independent directors throughout its sometimes heated interactions with Snyder over the past year, will remain lead independent director. Shares of Six Flags closed at $7.49 yesterday, up 0.4 percent.

Staff writer Thomas Heath contributed to this report.

Daniel Snyder says Six Flags will still accept bids.

Mark Shapiro left ESPN to join Snyder.