Event: MCA Division 1

Opponent Rating Result
Roger G Williamson 2212 0 - 1
Steve Kee 2146 0 - 1
David J James 2091 0 - 1
Gary Quillan 2411 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1815 = (8860 + 400 * (0 - 4)) / 4)

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