Event: Division 1

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Opponent	Rating	Result
Steve F Tarr	1828	0 - 1
Bowie Carter	1570	½ - ½
Peter M Collins	1729	1 - 0

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

1709 = (5127 + 400 * (1 - 1)) / 3)