Event: Division 2

Opponent Rating Result
Graham K Brown 1726 0 - 1
Arun Broadley 1604 ½ - ½
Ronald C Andriessen 1536 ½ - ½
Frank Jewell 1484 ½ - ½
Richard J West 1656 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1521 = (8006 + 400 * (0 - 1)) / 5)

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