Event: Walker Shield

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Opponent	Rating	Result
James Diddams	1486	½ - ½
Robert Cronin	1466	1 - 0
Kenneth Keeler	1463	1 - 0

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

1738 = (4415 + 400 * (2 - 0)) / 3)