Event: South Cheshire Shield

Opponent Rating Result
Julian N Hawthorne 1680 ½ - ½
Martin J Chadwick 1323 1 - 0
Greg Cannon 1750 0 - 1
Sandra G Blackburn 1562 ½ - ½
Stephen J Emmerton 1545 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1492 = (7860 + 400 * (1 - 2)) / 5)

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