Event: Open County Championship

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Opponent	Rating	Result
Norman A Hutchinson	2044	1 - 0
Timothy Lunn	2028	½ - ½
Stephen LA Orton	2139	1 - 0
Agoston Mihalik	2256	½ - ½
Alan B Merry	2544	0 - 1
Vivash Samarakoon	2108	½ - ½

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

2253 = (13119 + 400 * (2 - 1)) / 6)