Event: Open

Opponent Rating Result
John Pitcher 205 ½ - ½
Martin D Smyth 174 1 - 0
Andrew C Southall 183 1 - 0
John Pitcher 205 ½ - ½
Martin D Smyth 174 0 - 1
Andrew C Southall 183 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

321 = (1124 + 400 * (3 - 1)) / 6)

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