Event: 4-Board Division 1

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Opponent	Rating	Result
John Thackray	1976	0 - 1
F Hal Jorna	1617	1 - 0
Thomas L Hackett	1873	0 - 1

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

1689 = (5466 + 400 * (1 - 2)) / 3)