Event: Division 1

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Opponent Rating Result
Martyn Hamer 2143 0 - 1
Philip Titterington 1770 0 - 1
Ronnie Whiteside 1723 ½ - ½
Kailash Narendran 1752 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1547 = (7388 + 400 * (0 - 3)) / 4)

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