Event: Kenneth Appleby (U1700)

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Opponent	Rating	Result
Izzy Jacobs	0	½ - ½
Steve A Spencer	0	0 - 1
Ivor Timmis	1466	0 - 1

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

222 = (1466 + 400 * (0 - 2)) / 3)