Event: Division B

Opponent Rating Result
Ian Williamson 137 ½ - ½
Michael B Carroll 138 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-63 = (275 + 400 * (0 - 1)) / 2)

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Opponent Rating Result
Dave S Almond 133 ½ - ½
Steve G Hughes 112 ½ - ½
Andrew Peters 130 0 - 1
Steve G Hughes 113 1 - 0
Steven Mason 113 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

120 = (601 + 400 * (1 - 1)) / 5)