Event: Broadland Club Championship Group B

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Opponent	Rating	Result
Martin Griffin	1493	½ - ½
Chris Cook	1392	1 - 0
Martin Griffin	1493	0 - 1
Chris Cook	1392	1 - 0

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

1543 = (5770 + 400 * (2 - 1)) / 4)