Event: Division Four

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Opponent Rating Result
Paul Barrett 117 0 - 1
Lawrence F Hayden 128 0 - 1
Richard Woolley 109 ½ - ½
Patrick Kelly 121 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-81 = (475 + 400 * (0 - 2)) / 4)

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