Event: Division 1

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Opponent	Rating	Result
James N Stayt	1918	1 - 0
Richard M Webb	2259	½ - ½
Mark Josse	2235	½ - ½

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

2271 = (6412 + 400 * (1 - 0)) / 3)