Event: 2022 Douglas Championship

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Opponent	Rating	Result
Sam Rangdale	0	1 - 0
John Costello	1764	½ - ½
Paul Smith	1717	½ - ½
Victor Magold	1957	0 - 1

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

1360 = (5438 + 400 * (1 - 1)) / 4)