Event: AG Sunderland

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Opponent Rating Result
Stephen Burton 1337 1 - 0
Brian Ward 1210 1 - 0
michael Jones 1493 ½ - ½
Richard J Coates 1601 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1710 = (5641 + 400 * (3 - 0)) / 4)

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