Event: T W Crabb Shield Tournament

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Opponent	Rating	Result
Marawan Shaaban	1730	1 - 0
Nathaniel Holroyd-Doveton	1750	½ - ½
Jim Davis	185	0 - 1
Talakalukoppa Amarnath	1557	0 - 1
Robert Porter	1578	½ - ½
Marek Krajci	1467	0 - 1

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

1245 = (8267 + 400 * (1 - 3)) / 6)