Event: B&DCL Div 4

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Opponent	Rating	Result
George A Wright	1409	1 - 0
Mike Rutter	1673	½ - ½
Stefan Matthews	1600	½ - ½
Roger Chalk	1650	1 - 0
Stefan Matthews	1600	½ - ½
Roger D Howell	1449	½ - ½
Leo Camopy	1548	1 - 0

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

1733 = (10929 + 400 * (3 - 0)) / 7)