Event: Summer Rapid

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Opponent Rating Result
Charlie G Swinson 1304 1 - 0
David E Shiers 1651 1 - 0
Wesley J Vickers 1791 1 - 0
Roger W Walker 1882 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2057 = (6628 + 400 * (4 - 0)) / 4)

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