Event: Div1

PDF Excel

Opponent	Rating	Result
Paul Fletcher	179	1 - 0
Paul Madden	196	0 - 1
David Latham	181	½ - ½
Michael D Johnson	169	½ - ½

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

181 = (725 + 400 * (1 - 1)) / 4)