Event: Hutchinson

Opponent Rating Result
Derek Ludlam 0 0 - 1
Paul Kadzionis 105 0 - 1
Dave Young 81 1 - 0
Steve Harrington 121 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-23 = (307 + 400 * (1 - 2)) / 4)

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