Event: Division 1

Opponent Rating Result
George Neale 158 ½ - ½
R Alan Barton 178 ½ - ½
Philip M Stimpson 175 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

170 = (511 + 400 * (0 - 0)) / 3)

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