Event: Walker Shield

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Opponent	Rating	Result
Michael Davies	1278	0 - 1
Jimmy Phillips	1350	0 - 1
Bob Wallace	1470	1 - 0
Kenneth Keeler	1447	1 - 0
Joseph Morris	1310	1 - 0
Conor Gorman	903	1 - 0
Vincent Larson	1250	1 - 0
Darren Coker	1090	1 - 0

performance = (sum(opponents ratings) + 400(wins-losses)) / games

1462 = (10098 + 400 * (6 - 2)) / 8)