Event: Division Four

Opponent Rating Result
John Davis 135 ½ - ½
John Foxall 137 0 - 1
T Giles Stanton 132 ½ - ½
Simon A Killarney 131 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-66 = (535 + 400 * (0 - 2)) / 4)

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