Event: Walker Shield

Opponent Rating Result
Seymour MacMahon 1524 0 - 1
Felix Coker 1270 ½ - ½
Roy J McAloney 1352 0 - 1
Leon A Garfield 1480 0 - 1
Michael Davies 1278 1 - 0
David Erwee 1533 0 - 1
Bob Wallace 1470 ½ - ½
Jon Hunt 1249 1 - 0
Bob Wallace 1470 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1358 = (12626 + 400 * (3 - 4)) / 9)

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