Event: Watford - St Albans (rapidplay)

Opponent Rating Result
Jack Turvill-Kingsbury 768 ½ - ½
Jack Turvill-Kingsbury 768 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

568 = (1536 + 400 * (0 - 1)) / 2)

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