Event: Division 1

Opponent Rating Result
Colin Purdon 2088 ½ - ½
Derek R Johnson 2013 1 - 0
Gwilym T Price 2125 ½ - ½
H Trevor Jones 1720 1 - 0
Samuel J Brennan 1810 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2031 = (9756 + 400 * (2 - 1)) / 5)

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