| 60328 | Jefferis - Leurette | 0-1 | 1st of December 2011 22:05:33 | (chess) | rated |
| 60333 | Melquiades - Jefferis | 0-1 | 25th of October 2011 23:27:19 | (chess) | rated |
| 60337 | Jefferis - Bromo | 1-0 | 29th of October 2011 23:29:49 | (chess) | rated |
| 60340 | Gresham - Jefferis | 0-1 | 27th of November 2011 14:13:28 | (chess) | rated |
| 60342 | Jefferis - Cavaille | 0-1 | 25th of October 2011 21:33:42 | (chess) | rated |
| 60343 | Dsouza - Jefferis | 0-1 | 14th of November 2011 13:53:57 | (chess) | rated |
| 60416 | Jefferis - Budnar | 0-1 | 4th of February 2012 22:05:21 | (chess) | rated |
| 60421 | Gresham - Jefferis | 0-1 | 16th of December 2011 16:34:29 | (chess) | rated |
| 60425 | Jefferis - Gonet | 1-0 | 19th of November 2011 13:59:03 | (chess) | rated |
| 60428 | Jacobs - Jefferis | 1-0 | 8th of January 2012 23:14:09 | (chess) | rated |
| 60431 | Jefferis - Pipac | 0-1 | 14th of December 2011 19:16:45 | (chess) | rated |
| 60432 | Dsouza - Jefferis | 1-0 | 21st of December 2011 20:19:30 | (chess) | rated |
| 60457 | Czudek - Jefferis | 1-0 | 10th of January 2012 20:35:16 | (chess) | unrated |
| 60462 | Jefferis - Brumec | 0-1 | 19th of December 2011 11:32:37 | (chess) | unrated |
| 60466 | Bant - Jefferis | 0-1 | 14th of December 2011 04:25:35 | (chess) | unrated |
| 60470 | Jefferis - Gramajo | 1-0 | 14th of December 2011 20:58:45 | (chess) | unrated |
| 60471 | Hase - Jefferis | 1-0 | 22nd of December 2011 19:21:11 | (chess) | unrated |
| 60472 | Jefferis - Roe | 0-1 | 14th of December 2011 20:18:14 | (chess) | unrated |
| 60525 | Malish - Jefferis | 0-1 | 24th of December 2011 05:13:14 | (chess) | unrated |
| 60530 | Jefferis - Brumec | 0-1 | 10th of December 2011 09:29:59 | (chess) | unrated |
| 60534 | Bant - Jefferis | 0-1 | 18th of December 2011 04:38:16 | (chess) | unrated |
| 60537 | Jefferis - Gramajo | 1-0 | 6th of December 2011 22:57:06 | (chess) | unrated |
| 60539 | Sternik - Jefferis | 1-0 | 27th of December 2011 10:47:55 | (chess) | unrated |
| 60541 | Jefferis - Pech | 1-0 | 23rd of December 2011 17:03:31 | (chess) | unrated |
| 60542 | Jefferis - Bromo | 1-0 | 20th of December 2011 17:18:23 | (chess) | rated |
| 60543 | Cavaille - Jefferis | 1-0 | 3rd of December 2011 18:25:18 | (chess) | rated |
| 60544 | Jefferis - Dsouza | 0-1 | 25th of December 2011 16:22:28 | (chess) | rated |
| 60545 | Leurette - Jefferis | 1-0 | 10th of December 2011 09:28:09 | (chess) | rated |
| 60546 | Jefferis - Neil | 0-1 | 24th of December 2011 10:59:18 | (chess) | rated |
| 60547 | Pechova - Jefferis | 0-1 | 14th of December 2011 21:21:16 | (chess) | rated |
| 60702 | Ezhov - Jefferis | 0-1 | 21st of December 2011 16:53:53 | (chess) | unrated |
| 60707 | Jefferis - Riha | 0-1 | 29th of November 2011 19:24:05 | (chess) | unrated |
| 60711 | Bant - Jefferis | 0-1 | 21st of December 2011 16:53:53 | (chess) | unrated |
| 60715 | Jefferis - Domingo | 0-1 | 18th of December 2011 11:29:41 | (chess) | unrated |
| 60716 | Pechova - Jefferis | 0-1 | 25th of December 2011 17:19:52 | (chess) | unrated |
| 60717 | Jefferis - Pipac | 1-0 | 19th of December 2011 15:21:40 | (chess) | unrated |
| 60789 | Jefferis - Bromo | 0-1 | 22nd of December 2011 10:21:45 | (chess) | rated |
| 60794 | Di Giandomenico - Jefferis | 0-1 | 24th of December 2011 13:22:37 | (chess) | rated |
| 60799 | Jefferis - Lazarov | 1-0 | 31st of December 2011 17:35:57 | (chess) | rated |
| 60800 | Stoyanov - Jefferis | 1-0 | 18th of December 2011 11:28:27 | (chess) | rated |
| 60801 | Jefferis - Pipac | 0-1 | 31st of December 2011 10:53:18 | (chess) | rated |
| 60802 | Nath - Jefferis | 0-1 | 29th of December 2011 17:31:58 | (chess) | rated |
| 60836 | Melquiades - Jefferis | 0-1 | 15th of January 2012 23:20:37 | (chess) | rated |
| 60841 | Jefferis - Cavaille | 1-0 | 15th of January 2012 22:20:37 | (chess) | rated |
| 60845 | Dsouza - Jefferis | 1-0 | 12th of January 2012 19:41:51 | (chess) | rated |
| 60849 | Jefferis - Gramajo | 0-1 | 14th of December 2011 19:18:10 | (chess) | rated |
| 60850 | Neil - Jefferis | 1-0 | 22nd of December 2011 10:21:58 | (chess) | rated |
| 60851 | Jefferis - Balander | 1-0 | 26th of February 2012 08:00:52 | (chess) | rated |
| 60881 | Jefferis - Moreira | 0-1 | 10th of December 2011 09:34:01 | (chess) | unrated |
| 60882 | Simmelink - Jefferis | 1-0 | 20th of December 2011 01:14:58 | (chess) | unrated |
| 60883 | Jefferis - Ruano | 1-0 | 22nd of February 2012 07:50:27 | (chess) | unrated |
| 60884 | Garcia - Jefferis | 1-0 | 18th of December 2011 11:26:45 | (chess) | unrated |
| 60885 | Jefferis - Shishkin | 1-0 | 7th of January 2012 05:37:49 | (chess) | unrated |
| 60886 | Sternik - Jefferis | 1-0 | 24th of December 2011 18:17:37 | (chess) | unrated |
| 61660 | Jefferis - Conde | 0-1 | 27th of January 2012 19:02:40 | (chess) | unrated |
| 61661 | Campos - Jefferis | 0-1 | 2nd of February 2012 06:45:17 | (chess) | unrated |
| 61662 | Jefferis - Me | 0-1 | 28th of March 2012 20:35:37 | (chess) | unrated |
| 61663 | Salinas - Jefferis | 1-0 | 20th of March 2012 21:34:09 | (chess) | unrated |
| 61664 | Jefferis - Chang | 0-1 | 7th of January 2012 02:02:23 | (chess) | unrated |
| 61665 | Trigance - Jefferis | 1-0 | 13th of January 2012 01:00:31 | (chess) | unrated |
| 62322 | Jefferis - Ponce | 0-1 | 26th of February 2012 00:29:23 | (chess) | rated |
| 62327 | van Dijk - Jefferis | 1-0 | 7th of February 2012 20:04:13 | (chess) | rated |
| 62331 | Jefferis - Suhardjo | 0-1 | 29th of February 2012 21:50:55 | (chess) | rated |
| 62334 | Moore - Jefferis | 1-0 | 7th of February 2012 20:04:47 | (chess) | rated |
| 62336 | Jefferis - Nudo | 0-1 | 6th of March 2012 22:00:02 | (chess) | rated |
| 62337 | O Brien - Jefferis | 1-0 | 18th of February 2012 11:21:56 | (chess) | rated |
| 62874 | Jefferis - Domingo | 0-1 | 23rd of February 2012 19:09:32 | (chess) | unrated |
| 62875 | Riha - Jefferis | 1-0 | 22nd of February 2012 19:47:24 | (chess) | unrated |
| 62876 | Jefferis - Chang | 1-0 | 12th of April 2012 23:35:01 | (chess) | unrated |
| 62877 | Conde - Jefferis | 0-1 | 3rd of March 2012 08:09:00 | (chess) | unrated |
| 62878 | Jefferis - Pech | 1-0 | 1st of April 2012 12:19:55 | (chess) | unrated |
| 62879 | Strohmeier - Jefferis | 0-1 | 5th of February 2012 17:56:29 | (chess) | unrated |
| 68718 | Jefferis - Kasabasic | 0-1 | 26th of January 2013 00:56:39 | (chess) | rated |
| 68725 | Flores - Jefferis | 1-0 | 26th of December 2012 21:36:31 | (chess) | rated |
| 68731 | Jefferis - Gibson | 0-1 | 18th of January 2013 12:33:15 | (chess) | rated |
| 68736 | Pentru - Jefferis | 1-0 | 23rd of December 2012 16:18:58 | (chess) | rated |
| 68740 | Jefferis - Jabot | 0-1 | 23rd of January 2013 12:44:39 | (chess) | rated |
| 68743 | Faust - Jefferis | 1-0 | 3rd of January 2013 20:08:38 | (chess) | rated |
| 68745 | Jefferis - Kuge | 0-1 | 28th of December 2012 01:59:36 | (chess) | rated |
| 68746 | Leurette - Jefferis | 1-0 | 26th of January 2013 00:56:39 | (chess) | rated |
| 74482 | Bromo - Jefferis | 1-0 | 1st of October 2013 03:05:40 | (chess) | rated |
| 74487 | Jefferis - Melquiades | 0-1 | 27th of September 2013 03:04:08 | (chess) | rated |
| 74491 | Cavaille - Jefferis | 1-0 | 28th of September 2013 15:05:58 | (chess) | rated |
| 74494 | Jefferis - Gramajo | 0-1 | 11th of September 2013 13:46:20 | (chess) | rated |
| 74496 | Pechova - Jefferis | 1-0 | 13th of September 2013 01:48:32 | (chess) | rated |
| 74498 | Jefferis - Dotti Contra | 0-1 | 23rd of August 2013 12:26:04 | (chess) | rated |
| 79185 | Jefferis - Flores | 0-1 | 4th of May 2014 12:54:36 | (chess) | rated |
| 79192 | Kukula - Jefferis | 1-0 | 7th of April 2014 10:13:02 | (chess) | rated |
| 79198 | Jefferis - Josse | 0-1 | 7th of April 2014 10:13:17 | (chess) | rated |
| 79203 | Yarkov - Jefferis | 1-0 | 26th of May 2014 09:54:21 | (chess) | rated |
| 79207 | Jefferis - Migliorini | 0-1 | 23rd of May 2014 09:44:33 | (chess) | rated |
| 79210 | Jimenez Alban - Jefferis | 1-0 | 19th of May 2014 09:30:52 | (chess) | rated |
| 79212 | Jefferis - Petropoulos | 0-1 | 23rd of May 2014 09:44:33 | (chess) | rated |
| 79213 | Baggersgaard - Jefferis | 0-1 | 6th of April 2014 19:22:48 | (chess) | rated |
| 83090 | Jefferis - Flores | 0-1 | 2nd of December 2014 20:05:05 | (chess) | rated |
| 83097 | Teverovski - Jefferis | 1-0 | 12th of November 2014 21:35:45 | (chess) | rated |
| 83103 | Jefferis - Fabris | 0-1 | 30th of November 2014 09:54:19 | (chess) | rated |
| 83108 | Sorcinelli - Jefferis | 1-0 | 14th of November 2014 12:14:34 | (chess) | rated |
| 83112 | Jefferis - Ali | 0-1 | 28th of November 2014 17:45:14 | (chess) | rated |
| 83115 | Sternik - Jefferis | 1-0 | 21st of November 2014 18:09:20 | (chess) | rated |
| 83117 | Jefferis - Hilbert | 0-1 | 28th of November 2014 17:45:35 | (chess) | rated |
| 83118 | Todd - Jefferis | 0-1 | 19th of December 2014 02:10:36 | (chess) | rated |
| 91745 | Jefferis - Teverovski | 0-1 | 14th of June 2016 22:49:55 | (chess) | rated |
| 91750 | Carrizo - Jefferis | 1-0 | 22nd of March 2016 16:06:01 | (chess) | rated |
| 91754 | Jefferis - Pintor | 0-1 | 21st of April 2016 22:05:40 | (chess) | rated |
| 91757 | Duttagupta - Jefferis | 1-0 | 6th of June 2016 10:06:32 | (chess) | rated |
| 91759 | Jefferis - Znamenski | 0-1 | 20th of April 2016 10:03:14 | (chess) | rated |
| 91760 | Haack - Jefferis | 1-0 | 4th of June 2016 09:55:25 | (chess) | rated |
| 101946 | Jefferis - de la Foret | 0-1 | 28th of February 2018 15:45:25 | (chess) | rated |
| 101951 | MacGregor - Jefferis | 1-0 | 28th of February 2018 15:45:25 | (chess) | rated |
| 101956 | Jefferis - Gorsek | 0-1 | 28th of February 2018 15:45:25 | (chess) | rated |
| 101957 | Pintor - Jefferis | 1-0 | 28th of February 2018 03:44:17 | (chess) | rated |
| 101958 | Jefferis - Bromo | 0-1 | 1st of March 2018 03:45:12 | (chess) | rated |
| 101959 | Ezhov - Jefferis | 1-0 | 5th of March 2018 16:18:08 | (chess) | rated |
| 114607 | Benone - Jefferis | 1-0 | 8th of May 2019 19:40:45 | (chess) | rated |
| 114612 | Jefferis - Goldmund | 0-1 | 18th of April 2019 17:40:01 | (chess) | rated |
| 114616 | Leurette - Jefferis | 0-1 | 1st of March 2019 10:16:35 | (chess) | rated |
| 114619 | Jefferis - Barradas | 1-0 | 7th of April 2019 03:34:23 | (chess) | rated |
| 114621 | Haack - Jefferis | 1-0 | 14th of April 2019 16:55:22 | (chess) | rated |
| 114623 | Jefferis - Strohmeier | 0-1 | 20th of April 2019 05:50:57 | (chess) | rated |
| 141833 | Jefferis - Swiatek | 0-1 | 28th of August 2023 14:28:54 | (chess) | rated |
| 141838 | Slawomir - Jefferis | 1-0 | 25th of August 2023 13:27:15 | (chess) | rated |
| 141842 | Jefferis - Vasquez | 0-1 | 24th of August 2023 12:51:41 | (chess) | rated |
| 141845 | Quintero - Jefferis | 1-0 | 21st of August 2023 22:16:46 | (chess) | rated |
| 141847 | Jefferis - Eser | 0-1 | 24th of August 2023 00:23:27 | (chess) | rated |
| 141848 | Foster - Jefferis | 1-0 | 23rd of August 2023 12:18:37 | (chess) | rated |
| 144399 | Jefferis - Brand Lyard | 0-1 | 3rd of May 2024 09:46:30 | (chess) | rated |
| 144400 | Martinez - Jefferis | 1-0 | 28th of April 2024 02:41:34 | (chess) | rated |
| 144401 | Jefferis - Jerez | 0-1 | 28th of April 2024 14:49:11 | (chess) | rated |
| 144402 | Martinez Camacho - Jefferis | 1-0 | 7th of May 2024 04:22:41 | (chess) | rated |
| 144403 | Jefferis - Joubert | 0-1 | 19th of March 2024 17:46:11 | (chess) | rated |
| 144404 | Anon - Jefferis | 1-0 | 11th of May 2024 02:34:00 | (chess) | rated |
| 145162 | Anon - Jefferis | 0-1 | 4th of June 2024 08:58:06 | (chess) | rated |
| 145168 | Jefferis - MacDonald | 0-1 | 4th of June 2024 08:58:06 | (chess) | rated |
| 145169 | Zemlyanov - Jefferis | 1-0 | 4th of June 2024 08:58:06 | (chess) | rated |
| 145170 | Jefferis - Nezumi | 0-1 | 4th of June 2024 08:58:06 | (chess) | rated |
| 145171 | Martinez - Jefferis | 1-0 | 4th of June 2024 08:58:06 | (chess) | rated |
| 145172 | Jefferis - Jerez | 0-1 | 4th of June 2024 08:58:06 | (chess) | rated |