Event: Division One

Opponent Rating Result
Richard A Bates 2397 0 - 1
Philipp Orgler 2110 1 - 0
Thomas Villiers 2297 ½ - ½
Richard A Bates 2381 0 - 1
Richard Black 2121 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2101 = (11306 + 400 * (1 - 3)) / 5)

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