Event: South Cheshire Shield

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Opponent	Rating	Result
Nigel Gardner	1495	0 - 1
Andrew Crosby	1444	½ - ½
Matthew J Watson	1000	1 - 0

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

1313 = (3939 + 400 * (1 - 1)) / 3)