Event: Christmas Allegro

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Opponent	Rating	Result
Pranavsuriya Kumarvimala	1347	1 - 0
Andrew R Brett	2107	½ - ½
Jeff R Dawson	1942	1 - 0
David J Payne	1838	0 - 1
David W Moore	1303	1 - 0
David A LeMoir	2166	½ - ½

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

1917 = (10703 + 400 * (3 - 1)) / 6)