Event: Autumn OTB Division 3

Opponent Rating Result
Tudor Rickards 1713 ½ - ½
Simon J Taylor 1780 ½ - ½
Joel Hutchinson 1800 0 - 1
Chagdarsuran Batbileg 1600 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1623 = (6893 + 400 * (0 - 1)) / 4)

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