Event: D&DCL Div 1

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Opponent	Rating	Result
Ralph MA Allen	1758	½ - ½
Simon N Gilmore	2103	0 - 1
Maurice J Hill	1683	½ - ½
Ralph MA Allen	1758	1 - 0
Martin Pettinger	1728	½ - ½
Justin Smith	1525	1 - 0
George Burdell	0	½ - ½

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

1565 = (10555 + 400 * (2 - 1)) / 7)