Event: St Andrews Club Championship

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Opponent Rating Result
Derek A Sheppard 135 0 - 1
David P Thrun 79 ½ - ½
Stephen Garner 88 0 - 1
Lester Jones 111 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-97 = (413 + 400 * (0 - 2)) / 4)

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