Event: Doncaster League

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Opponent	Rating	Result
Peter JE Ackley	2104	½ - ½
David O Sunday	0	0 - 1
Phillip J Battye	1642	1 - 0
Zak Tomlinson	1824	½ - ½
Ismet Berisha	1690	0 - 1
Zak Tomlinson	1839	½ - ½
John Smart	1687	½ - ½
Martin S Simmonds	1766	½ - ½

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

1519 = (12552 + 400 * (1 - 2)) / 8)