Event: Derby & District Division 2

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Opponent	Rating	Result
George McCluskey	1640	½ - ½
John S Shaw	1725	½ - ½
G Burdell	1804	0 - 1

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

1590 = (5169 + 400 * (0 - 1)) / 3)