Event: Division 1

Opponent Rating Result
Jonathan Day 1871 0 - 1
Stephen Tatlow 0 1 - 0
Richard Maclannan 1819 0 - 1
Gary R Andriessen 1902 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1298 = (5592 + 400 * (1 - 2)) / 4)

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