Event: Individual Championship

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Opponent	Rating	Result
Maurice J Hill	1683	0 - 1
Leslie J Fancourt	1563	0 - 1
Michael D Boreham	1503	0 - 1
Mohinderpal Samra	1345	½ - ½
Terry Knight	1255	0 - 1
Graham J Pace	1503	½ - ½
Colin Ross	1435	1 - 0

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

1298 = (10287 + 400 * (1 - 4)) / 7)