Event: Summer League (Pool A)

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Opponent	Rating	Result
William Sanders	1353	1 - 0
Alun Richards	1712	½ - ½
John H Sleggs	1596	0 - 1
Thomas Weavin	1619	0 - 1
William Sanders	1353	1 - 0
Alun Richards	1712	1 - 0
John H Sleggs	1596	1 - 0
Thomas Weavin	1619	0 - 1

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

1620 = (12560 + 400 * (4 - 3)) / 8)