Event: OTB Jul 10 + 5 Rapid

Opponent Rating Result
Huw D Jacob 1375 1 - 0
Almas Dohon 1290 ½ - ½
Mark RA Murrell 1894 0 - 1
Ivan Hutcheson 1428 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1497 = (5987 + 400 * (1 - 1)) / 4)

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