Event: Division 4

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Opponent Rating Result
David S Johnson 113 1 - 0
Paul Clapham 101 ½ - ½
Jeffrey G Tombs 103 1 - 0
Neville S Jones 102 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

305 = (419 + 400 * (2 - 0)) / 4)

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