Event: Division 1

Opponent Rating Result
Steven Lee 1897 ½ - ½
David N Clark 1941 1 - 0
Roger G Williamson 2256 0 - 1
Gary Quillan 2411 0 - 1
Owen Crawford 2030 0 - 1
Charles W Kennaugh 2151 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1914 = (12686 + 400 * (1 - 4)) / 6)

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