Event: Division 2

Opponent Rating Result
Owen R Robson 1722 ½ - ½
Michael Jackson 1886 ½ - ½
Aaron Rich 1659 0 - 1
Richard Sanger 1690 ½ - ½
Herbert Lockwood 1717 1 - 0
Max Parkhouse 1947 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1770 = (10621 + 400 * (1 - 1)) / 6)

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