Event: Division 1

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Opponent	Rating	Result
Peter Kirby	177	1 - 0
Joseph Stewart	206	0 - 1
Rob J Cannell	201	0 - 1
Duncan Dicks	194	0 - 1
Peter Kirby	176	½ - ½
Michael P Townsend	186	½ - ½
Paul R Masters	176	½ - ½
Duncan Dicks	196	½ - ½

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

89 = (1512 + 400 * (1 - 3)) / 8)