Event: Division One

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Opponent Rating Result
Iain A Galloway 193 ½ - ½
Agoston Mihalik 204 0 - 1
Martin D Smyth 167 ½ - ½
David W Anderton 190 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

89 = (754 + 400 * (0 - 1)) / 4)

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