Event: 4-Board Division 1

Opponent Rating Result
Keith Porteous 1673 0 - 1
John Thackray 1966 0 - 1
Stephen Brown 1522 0 - 1
F Hal Jorna 1633 0 - 1
Joseph Catto 1754 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1310 = (8548 + 400 * (0 - 5)) / 5)

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