Event: Division Four

Opponent Rating Result
David M Cotterell 113 ½ - ½
Simon A Jones 106 1 - 0
Barry R Smith 117 1 - 0
Paul Barrett 117 ½ - ½
David Etheridge 95 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

350 = (548 + 400 * (3 - 0)) / 5)

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