Event: Doncaster Handicap League

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Opponent Rating Result
Alan Bramall 141 ½ - ½
Robbie Merc 104 1 - 0
Barry Tonge 84 1 - 0
Alan J Smith 111 1 - 0
Patrick Wilson 55 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

419 = (495 + 400 * (4 - 0)) / 5)

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