Event: Sam Haystead Memorial Trophy (Richardson Plate)

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Opponent	Rating	Result
Harry Feather	109	1 - 0
Ray King	169	½ - ½
David Glossop	127	½ - ½

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

268 = (405 + 400 * (1 - 0)) / 3)