| The 2005 U. S. Open Chess Championship was held from August 6th through August 14th in Phoenix, Arizona at the luxurious Biltmore Hotel. 455 players competed in the main event. |
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| Through eight rounds, Grandmaster Larry Christiansen from Massachusetts led the tournament. However, Larry has lived in Red Sox Nation long enough to know, "That's why they play nine!" |
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| In the last round of the tournament, Grandmaster Vadim Milov from Switzerland defeated Christiansen to tie for first place with Grandmaster Joel Benjamin from New Jersey with eight points. |
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