Event: Bob Burns 2019

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Opponent Rating Result
Dave Young 79 ½ - ½
Bill Tait 133 1 - 0
David Barlow 173 0 - 1
Andrew Bak 179 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

41 = (564 + 400 * (1 - 2)) / 4)

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