User:MarkusSchulze/Wikimedia Board of Trustees elections, 2009

In July/August 2009, Wikimedia used the Schulze method for the election to its Board of Trustees: Three vacant seats had to be filled. There were 18 candidates.

Stage 1

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Each ballot contains a list of all candidates. Each voter ranks these candidates in order of preference. Each voter gives a '1' to his favorite candidate, a '2' to his second favorite candidate, a '3' to his third favorite candidate, etc..

Each voter may ...

  • ... give the same preference to more than one candidate. This indicates that this voter is indifferent between these candidates.
  • ... skip preferences. However, skipping preferences has no impact on the result of the elections, since only the order, in which the candidates are ranked, matters and not the absolute numbers of the preferences.
  • ... keep candidates unranked. When a voter doesn't rank all candidates, then this is interpreted as if this voter (1) strictly prefers all ranked to all unranked candidates and (2) is indifferent between all unranked candidates.

Stage 2

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In total, 2940 valid ballots were cast. Each figure represents the number of voters who ranked the candidate at the left better than the candidate at the top. A figure in green represents a victory in that pairwise comparison by the candidate at the left. A figure in red represents a defeat in that pairwise comparison by the candidate at the left.

TC KW SK GM DM TB JH SS DR JGG BB LP AK RP BAS GK KRO RK
Ting Chen 992 1083 1138 1177 1197 1273 1299 1301 1342 1378 1440 1426 1439 1445 1470 1501 1545
Kat Walsh 948 1021 1080 1130 1205 1234 1236 1221 1269 1284 1362 1367 1387 1386 1395 1448 1484
Samuel Klein 799 814 924 987 1059 1055 1080 1080 1126 1163 1216 1219 1224 1244 1247 1313 1348
Gerard Meijssen 803 826 864 930 980 1019 1093 1062 1120 1138 1240 1212 1222 1256 1259 1331 1367
Domas Mituzas 630 643 643 728 878 835 900 868 918 949 1019 1030 1034 1041 1071 1132 1150
Thomas Braun 713 782 812 811 858 895 933 929 956 994 1087 1056 1098 1083 1174 1227 1271
Jussi-Ville Heiskanen 552 571 603 598 647 746 773 742 771 834 907 905 917 918 943 1023 1040
Steve Smith 577 527 543 651 653 749 723 693 763 773 834 846 882 878 910 1006 1010
Dan Rosenthal 506 460 504 618 608 736 714 661 744 750 825 813 873 855 872 965 984
José Gustavo Góngora 504 553 553 576 584 672 632 706 699 732 834 803 840 836 930 975 996
Brady Brim-DeForest 366 359 322 409 415 495 492 466 469 534 629 586 655 644 712 773 794
Lourie Pieterse 370 379 384 415 436 468 459 488 473 478 525 561 597 597 698 782 785
Adam Koenigsberg 309 310 294 351 361 407 407 399 401 443 454 559 557 555 644 725 723
Ralph Potdevin 309 355 358 363 378 363 415 445 457 419 475 546 532 573 663 740 739
Beauford Anton Stenberg 263 283 259 316 320 362 347 342 339 381 379 469 431 475 566 635 653
Gregory Kohs 307 344 308 350 368 389 420 401 407 439 439 512 461 515 517 648 649
Kevin Riley O'Keeffe 287 315 302 337 338 321 359 347 366 381 388 399 401 417 429 503 521
Relly Komaruzaman 152 197 206 207 202 193 220 254 246 207 265 248 274 270 287 418 470

Stage 3

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As there was no circular tie, the Schulze ranking was identical to the direct comparisons of the candidates.

Therefore, the Schulze ranking was:

  1. Ting Chen
  2. Kat Walsh
  3. Samuel Klein
  4. Gerard Meijssen
  5. Domas Mituzas
  6. Thomas Braun
  7. Jussi-Ville Heiskanen
  8. Steve Smith
  9. Dan Rosenthal
  10. José Gustavo Góngora
  11. Brady Brim-DeForest
  12. Lourie Pieterse
  13. Adam Koenigsberg
  14. Ralph Potdevin
  15. Beauford Anton Stenberg
  16. Gregory Kohs
  17. Kevin Riley O'Keeffe
  18. Relly Komaruzaman

As three vacant seats had to be filled, the winners were Ting Chen, Kat Walsh, and Samuel Klein.

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