Event: Easter Rapidplay

Opponent Rating Result
Stephen Ollis 1538 0 - 1
Thomas Pyman 0 0 - 1
George Butterworth 1096 1 - 0
Harris Wilson 1219 0 - 1
David Pizzi 1324 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

955 = (5177 + 400 * (2 - 3)) / 5)

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