Event: Division 3

Opponent Rating Result
Ben Mason 1781 0 - 1
Ross Murphy 1720 0 - 1
John R Huthwaite 1743 ½ - ½
Marcel V Taylor 1773 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1654 = (7017 + 400 * (1 - 2)) / 4)

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