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

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

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

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

Therefore, the Schulze ranking was:

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

Stage 1

Stage 2

Stage 3

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