Event: 4-Board Division 2

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Opponent	Rating	Result
Paul Kennedy	125	0 - 1
John Scotter	121	½ - ½
George A Darling	160	1 - 0
Giles Dunn	134	0 - 1
John Scotter	120	½ - ½

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

52 = (660 + 400 * (1 - 2)) / 5)