Event: League Division Two

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Opponent	Rating	Result
Simon Weaver	1473	0 - 1
Sophie Clark	1250	1 - 0
David Riley	1593	0 - 1
Tommy Coker	1450	1 - 0
Mike P Maher	1705	0 - 1
Mohamed Hamdy-El Kady	1300	1 - 0
David Riley	1593	0 - 1
Maciej Bajorek	0	1 - 0
Mike P Maher	1699	0 - 1

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

1296 = (12063 + 400 * (4 - 5)) / 9)