Event: Siminson Cup 24

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Opponent	Rating	Result
Kenneth Keeler	1471	0 - 1
Brian W Williamson	1396	1 - 0
Don Richards	1360	0 - 1
Velibor Milovanovic	1556	0 - 1
Roy J McAloney	1401	0 - 1
Brian W Williamson	1396	½ - ½

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

1230 = (8580 + 400 * (1 - 4)) / 6)