Event: D&DCL Div 1

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Opponent	Rating	Result
John Potter	2174	0 - 1
Paul Madden	2104	0 - 1
Luke S Alldread	1862	0 - 1
Andrew Stevens	1952	½ - ½
Kevin J Dalley	1885	0 - 1
Andrew Robins	1778	1 - 0
Ranjit Nath	1754	½ - ½
Simon N Gilmore	2073	½ - ½
James R Shore	1699	1 - 0
David Williams	1862	½ - ½

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

1834 = (19143 + 400 * (2 - 4)) / 10)