Event: Gambit Rapidplay

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Opponent	Rating	Result
Leo Beacroft	1502	1 - 0
Leo Beacroft	1502	1 - 0
Marian Talmacel	1453	1 - 0
Marian Talmacel	1453	1 - 0
Michael H Barnes	2205	0 - 1
Michael H Barnes	2205	½ - ½
David C Dunne	1475	1 - 0
David C Dunne	1475	1 - 0
Dragoljub Sudar	1910	1 - 0
Dragoljub Sudar	1910	1 - 0
Michael H Barnes	2205	0 - 1
Michael H Barnes	2205	0 - 1

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

1958 = (21500 + 400 * (8 - 3)) / 12)