Event: Division One

Opponent Rating Result
Mark S Gray 206 ½ - ½
Ryszard Maciol 204 ½ - ½
Dimitar Mogilarov 210 0 - 1
Michael W Healey 217 1 - 0
Charlie B Nettleton 189 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

125 = (1026 + 400 * (1 - 2)) / 5)

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