Event: Division 1

Opponent Rating Result
Martyn Goodger 2104 ½ - ½
Stephen W Ruthen 1867 1 - 0
Simeon Bott 2003 0 - 1
Gilad Kalchheim 0 0 - 1
Norman A Hutchinson 1939 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1423 = (7913 + 400 * (1 - 3)) / 5)

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