Event: Baum Trophy summer league

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Opponent	Rating	Result
Paramaguru Gurusamy	1344	0 - 1
Charlton Siddo	1674	1 - 0
Vittorio Nigrelli	1660	1 - 0
Charlton Siddo	1674	½ - ½
Keith S Jones	1724	½ - ½
Keith S Jones	1724	1 - 0

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

1767 = (9800 + 400 * (3 - 1)) / 6)