Event: Open

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Opponent	Rating	Result
Mark L Hebden	2569	0 - 1
Luke Boynton	2032	0 - 1
Kevin Hurney	2050	½ - ½
John E Crump	1983	1 - 0
Mark L Hebden	2569	0 - 1
Luke Boynton	2032	½ - ½
Kevin Hurney	2050	½ - ½
John E Crump	1983	½ - ½

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

2059 = (17268 + 400 * (1 - 3)) / 8)