Event: Open Section

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Opponent	Rating	Result
Martin J Chadwick	1297	1 - 0
Alan M Paling	1915	½ - ½
Dylan E Cooper	1535	0 - 1
Philip Wright	1295	1 - 0(def)

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

1582 = (4747 + 400 * (1 - 1)) / 3)