PLAYER PAGE
Personal
Viljoen, J (Johandre)
Chess SA id
1110158449FIDE id
?Date of birth
2011-01-18 (U16)Gender
MaleRegion
West Rand (GWR)Citizen
RSATitles
Chess SA registered
NoLast active game
2025-12-07Personal details last changed
1900-01-01Junior GPX Games
Junior GPX Points
| Item | Main | Standard | Rapid | Blitz |
|---|---|---|---|---|
| Rating | 1323.6 | 1327.5 | 1200 | 1200 |
| Raw rating | 1267.6 | 1264.4 | 1200 | 1200 |
| Weighted rating | 1323.6 | 1327.5 | 1200 | 1200 |
| Weighted performance | 1207.1 | 1207 | 0 | 0 |
| Floor | 912.9 | 915.1 | 700 | 700 |
| K-factor | 32 | 32 | 36 | 36 |
| Min/Max rating change allowed | 150.6 | 151.3 | 165.8 | 165.8 |
| Highest rating | 1412.92025-09-01 | 1415.12025-09-01 | 12002018-10-01 | 12002018-10-01 |
| Highest raw rating | 1412.92025-09-01 | 1415.12025-09-01 | 12002024-02-01 | 12002024-02-01 |
| Highest weighted rating | 1324.42025-11-01 | 1329.52025-11-01 | 12002018-10-01 | 12002018-10-01 |
| Highest weighted performance | 1411.62025-06-01 | 1409.72025-09-01 | 12002024-02-01 | 12002024-02-01 |
| Prediction | ||||
|---|---|---|---|---|
| Item | Main | Standard | Rapid | Blitz |
| Rating change | -2.4 | -3.1 | 0 | 0 |
| New rating | 1321.2 | 1324.4 | 1200 | 1200 |
| Analysis | ||||
| Rating | 1323.6 | 1327.5 | 1200 | 1200 |
| Raw rating | 1267.6 | 1264.4 | 1200 | 1200 |
| Weighted rating | 1323.6 | 1327.5 | 1200 | |
| Weighted performance | 1207.1 | 1207 | 0 | |
| K-factor | 32 | 32 | 36 | 36 |
| Floor | 912.9 | 915.1 | 700 | 700 |
| Max/Min rating change allowed | 150.6 | 151.3 | 165.8 | 165.8 |
| Games | 0 | 0 | 0 | 0 |
| Score | 0 | 0 | 0 | 0 |
| Expected score | 0 | 0 | 0 | 0 |
| Score-Expected | 0 | 0 | 0 | 0 |
| Temp raw +/- | 0 | 0 | 0 | 0 |
| Final raw +/- | 0 | 0 | 0 | 0 |
| New raw rating | 1267.6 | 1264.4 | 1200 | 1200 |
| New weighted rating | 1321.2 | 1324.4 | 1200 | 1200 |
| New weighted performance | 1199 | 1198.9 | 0 | 0 |
| Temp new rating | 1321.2 | 1324.4 | 1200 | 1200 |
| Temp new rating +/- | -2.4 | -3.1 | 0 | 0 |
| Final new rating +/- | -2.4 | -3.1 | 0 | 0 |
| New rating | 1321.2 | 1324.4 | 1200 | 1200 |
| New K-factor | 32 | 32 | 36 | 36 |
| New floor | 912.9 | 915.1 | 700 | 700 |
| Item | Main | Standard | Rapid | Blitz |
|---|---|---|---|---|
| 0 | 0 | 0 | 0 | |
| 56 | 56 | 0 | 0 | |
| 10 | 10 | 0 | 0 | |
| 5 | 5 | 0 | 0 | |
| 0 | 0 | 0 | 0 | |
| 0 | 0 | 0 | 0 | |
| History | 71 | 71 | 0 | 0 |
| Games since | |||||||||||||||||
| Main66 | Standard66 | Rapid0 | Blitz0 | ||||||||||||||
| Gender | Male | ||||||||||||||||
| Age group | U16 | ||||||||||||||||
| Region | West Rand (GWR) | ||||||||||||||||
| Province | Gauteng (GT) | ||||||||||||||||
| Main | RSA | Province | Region | ||||||||||||||
| Overall | 3010 | 1014 | 85 | ||||||||||||||
| Male | 2372 | 794 | 64 | ||||||||||||||
| U16 | 479 | 165 | 11 | ||||||||||||||
| U16 Male | 357 | 119 | 5 | ||||||||||||||
| Standard | RSA | Province | Region | ||||||||||||||
| Overall | 2875 | 1048 | 95 | ||||||||||||||
| Male | 2291 | 836 | 74 | ||||||||||||||
| U16 | 462 | 167 | 9 | ||||||||||||||
| U16 Male | 349 | 127 | 4 | ||||||||||||||
| Rapid | RSA | Province | Region | ||||||||||||||
| Overall | -1 | -1 | -1 | ||||||||||||||
| Male | -1 | -1 | -1 | ||||||||||||||
| U16 | -1 | -1 | -1 | ||||||||||||||
| U16 Male | -1 | -1 | -1 | ||||||||||||||
| Blitz | RSA | Province | Region | ||||||||||||||
| Overall | -1 | -1 | -1 | ||||||||||||||
| Male | -1 | -1 | -1 | ||||||||||||||
| U16 | -1 | -1 | -1 | ||||||||||||||
| U16 Male | -1 | -1 | -1 | ||||||||||||||
| Games | Score | % | Dp | AvgOpp | Performance | |
| Main | 0 | 0 | 0 | 0 | 0 | 0 |
| Standard | 0 | 0 | 0 | 0 | 0 | 0 |
| Rapid | 0 | 0 | 0 | 0 | 0 | 0 |
| Blitz | 0 | 0 | 0 | 0 | 0 | 0 |
| Games | Score | % | Dp | AvgOpp | Performance | |
| Main | 56 | 30.5 | 54.46 | 37.9 | 1322.6 | 1360.5 |
| Standard | 56 | 30.5 | 54.46 | 37.9 | 1322.6 | 1360.5 |
| Rapid | 0 | 0 | 0 | 0 | 0 | 0 |
| Blitz | 0 | 0 | 0 | 0 | 0 | 0 |
| History | ||||||
| Games | Score | % | Dp | AvgOpp | Performance | |
| Main | 71 | 40.5 | 57.04 | 59.9 | 1300.7 | 1360.6 |
| Standard | 71 | 40.5 | 57.04 | 59.9 | 1300.7 | 1360.6 |
| Rapid | 0 | 0 | 0 | 0 | 0 | 0 |
| Blitz | 0 | 0 | 0 | 0 | 0 | 0 |
| Date | Main | Standard | Rapid | Blitz |
| 2026-01-01 | 1267.6 | 1264.4 | 1200 | 1200 |
| 2025-11-30 | 1309.4 | 1310.2 | 1200 | 1200 |
| 2025-11-01 | 1309.4 | 1310.2 | 1200 | 1200 |
| 2025-09-30 | 1402 | 1400.7 | 1200 | 1200 |
| 2025-09-01 | 1412.9 | 1415.1 | 1200 | 1200 |
| 2025-08-01 | 1391.7 | 1387.2 | 1200 | 1200 |
| 2025-07-01 | 1401.9 | 1398.5 | 1200 | 1200 |
| 2025-06-01 | 1411.6 | 1409.3 | 1200 | 1200 |
| 2025-05-01 | 1362.4 | 1359.6 | 1200 | 1200 |
| 2025-04-01 | 1300.8 | 1314.1 | 1200 | 1200 |
| 2025-03-01 | 1280.8 | 1291.7 | 1200 | 1200 |
| 2025-02-01 | 1276.2 | 1289.6 | 1200 | 1200 |
| 2025-01-01 | 1276.2 | 1289.6 | 1200 | 1200 |
| 2024-12-01 | 1276.2 | 1289.6 | 1200 | 1200 |
| 2024-11-01 | 1276.2 | 1289.6 | 1200 | 1200 |
| 2024-10-01 | 1276.2 | 1289.6 | 1200 | 1200 |
| 2024-09-01 | 1276.2 | 1289.6 | 1200 | 1200 |
| 2024-11-01 | 1276.2 | 1289.6 | 1200 | 1200 |
| 2024-07-01 | 1232.9 | 1240.3 | 1200 | 1200 |
| 2024-06-01 | 1232.9 | 1240.3 | 1200 | 1200 |
| 2024-05-01 | 1222.1 | 1226.6 | 1200 | 1200 |
| 2024-04-01 | 1222.1 | 1226.6 | 1200 | 1200 |
| 2024-03-01 | 1222.1 | 1226.6 | 1200 | 1200 |
| 2024-02-01 | 1222.1 | 1226.6 | 1200 | 1200 |
Comming soon.
Tournaments
| # | Tournament | Start | End | Type | Host | Rounds | Games | Score | Cfr | Analysis |
|---|
| # | Tournament | Start | End | Type | Host | Rounds | Games | Score | Cfr | Analysis |
|---|
Last 500 tournaments since 01 January 2018
| # | Tournament | Start | End | Type | Host | Rounds | Games | Score | Cfr | Analysis |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Gauteng Inter-Region at Emerald Resort 2025 (U16 Championship) | 2025-12-06 | 2025-12-07 | Standard | Sedibeng (GSV) | 5 | 5 | 0 | Yes | Analysis |
| 2 | West Rand Closed 2025 (U16) | 2025-10-18 | 2025-10-18 | Standard | West Rand (GWR) | 5 | 5 | 3.5 | Yes | Analysis |
| 3 | 2025 Gauteng Schools Provincial Individual Chess Championship (U15 Boys) | 2025-09-27 | 2025-09-27 | Standard | Tshwane (GTP) | 5 | 5 | 2 | Yes | Analysis |
| 4 | Bojanala's FIDE On The Orion Express 2025 (Rooks) | 2025-10-03 | 2025-10-05 | Standard | Bojanala Platina (NBR) | 6 | 6 | 1 | Yes | Analysis |
| 5 | West Rand Trials 2025 (U16) | 2025-09-06 | 2025-09-06 | Standard | West Rand (GWR) | 5 | 5 | 2.5 | Yes | Analysis |
| 6 | West Rand Women's Day Open 2025 (Rooks) | 2025-08-09 | 2025-08-09 | Standard | West Rand (GWR) | 5 | 5 | 3.5 | Yes | Analysis |
| 7 | 2025 D2 Schools League Finals (U15) | 2025-07-26 | 2025-07-26 | Standard | West Rand (GWR) | 5 | 5 | 3 | Yes | Analysis |
| 8 | West Rand Open 2.0 2025 (Rooks) | 2025-06-07 | 2025-06-07 | Standard | West Rand (GWR) | 5 | 5 | 3 | Yes | Analysis |
| 9 | 2025 D2 Schools Individuals (U15 Open) | 2025-05-10 | 2025-05-10 | Standard | West Rand (GWR) | 5 | 5 | 4 | Yes | Analysis |
| 10 | FIDE in The West 2025 (Rooks) | 2025-04-12 | 2025-04-12 | Standard | West Rand (GWR) | 5 | 5 | 3 | Yes | Analysis |
| 11 | West Rand Juniors 2025 (U16) | 2025-03-08 | 2025-03-08 | Standard | West Rand (GWR) | 5 | 5 | 3 | Yes | Analysis |
| 12 | 2025 West Rand Open (Rooks) | 2025-02-08 | 2025-02-08 | Standard | West Rand (GWR) | 5 | 5 | 2 | Yes | Analysis |
| 13 | D2 School League Finals 2024 (U13) | 2024-07-20 | 2024-07-20 | Standard | West Rand (GWR) | 5 | 5 | 4 | Yes | Analysis |
| 14 | 2024 D2 Schools Individuals (U13 Boys) | 2024-05-04 | 2024-05-04 | Standard | West Rand (GWR) | 5 | 5 | 3 | Yes | Analysis |
| 15 | D2 School League Finals 2023 (U13) | 2023-07-22 | 2023-07-22 | Standard | West Rand (GWR) | 5 | 5 | 3 | Yes | Analysis |
Top 3 Streaks
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 4 | TournamentWest Rand Women's Day Open 2025 | TournamentWest Rand Women's Day Open 2025 | ||||||
| date2025-08-09 | rnd1 | typeStandard | result0.5 | date2025-08-09 | rnd4 | typeStandard | result1 | ||
| OpponentMagobongo, E (Emihle) | OpponentLekgoba, R (Rethabile Ellen) | ||||||||
| 2 | 4 | TournamentD2 School League Finals 2024 | Tournament2025 West Rand Open | ||||||
| date2024-07-20 | rnd3 | typeStandard | result1 | date2025-02-08 | rnd1 | typeStandard | result1 | ||
| OpponentMagagula, S (Siyabonga) | OpponentFourie, T (Theo) | ||||||||
| 3 | 3 | TournamentWest Rand Closed 2025 | TournamentWest Rand Closed 2025 | ||||||
| date2025-10-18 | rnd3 | typeStandard | result1 | date2025-10-18 | rnd5 | typeStandard | result1 | ||
| OpponentMaritz, W (Waldo Hermann) | OpponentVenter, C (Christiaan) | ||||||||
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 4 | TournamentWest Rand Women's Day Open 2025 | TournamentWest Rand Women's Day Open 2025 | ||||||
| date2025-08-09 | rnd1 | typeStandard | result0.5 | date2025-08-09 | rnd4 | typeStandard | result1 | ||
| OpponentMagobongo, E (Emihle) | OpponentLekgoba, R (Rethabile Ellen) | ||||||||
| 2 | 4 | TournamentD2 School League Finals 2024 | Tournament2025 West Rand Open | ||||||
| date2024-07-20 | rnd3 | typeStandard | result1 | date2025-02-08 | rnd1 | typeStandard | result1 | ||
| OpponentMagagula, S (Siyabonga) | OpponentFourie, T (Theo) | ||||||||
| 3 | 3 | Tournament2025 D2 Schools League Finals | Tournament2025 D2 Schools League Finals | ||||||
| date2025-07-26 | rnd2 | typeStandard | result1 | date2025-07-26 | rnd4 | typeStandard | result1 | ||
| OpponentMothupi, R (Reotshepile) | OpponentMoruledi, N (Naledi) | ||||||||
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 4 | TournamentD2 School League Finals 2024 | Tournament2025 West Rand Open | ||||||
| date2024-07-20 | rnd3 | typeStandard | result1 | date2025-02-08 | rnd1 | typeStandard | result1 | ||
| OpponentMagagula, S (Siyabonga) | OpponentFourie, T (Theo) | ||||||||
| 2 | 3 | TournamentWest Rand Women's Day Open 2025 | TournamentWest Rand Women's Day Open 2025 | ||||||
| date2025-08-09 | rnd2 | typeStandard | result1 | date2025-08-09 | rnd4 | typeStandard | result1 | ||
| OpponentArlow, J (Jaden) | OpponentLekgoba, R (Rethabile Ellen) | ||||||||
| 3 | 3 | Tournament2025 D2 Schools League Finals | Tournament2025 D2 Schools League Finals | ||||||
| date2025-07-26 | rnd2 | typeStandard | result1 | date2025-07-26 | rnd4 | typeStandard | result1 | ||
| OpponentMothupi, R (Reotshepile) | OpponentMoruledi, N (Naledi) | ||||||||
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 4 | TournamentD2 School League Finals 2024 | Tournament2025 West Rand Open | ||||||
| date2024-07-20 | rnd3 | typeStandard | result1 | date2025-02-08 | rnd1 | typeStandard | result1 | ||
| OpponentMagagula, S (Siyabonga) | OpponentFourie, T (Theo) | ||||||||
| 2 | 3 | TournamentWest Rand Women's Day Open 2025 | TournamentWest Rand Women's Day Open 2025 | ||||||
| date2025-08-09 | rnd2 | typeStandard | result1 | date2025-08-09 | rnd4 | typeStandard | result1 | ||
| OpponentArlow, J (Jaden) | OpponentLekgoba, R (Rethabile Ellen) | ||||||||
| 3 | 3 | Tournament2025 D2 Schools League Finals | Tournament2025 D2 Schools League Finals | ||||||
| date2025-07-26 | rnd2 | typeStandard | result1 | date2025-07-26 | rnd4 | typeStandard | result1 | ||
| OpponentMothupi, R (Reotshepile) | OpponentMoruledi, N (Naledi) | ||||||||
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
Top 10 opponents most often played
| # | Opponent | Main | Standard | Rapid | Blitz | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gms | Score | Dp | Gms | Score | Dp | Gms | Score | Dp | Gms | Score | Dp | ||
| Aor | Prat | Aor | Prat | Aor | Prat | Aor | Prat | ||||||
| 1 | Mtsweni ,T (Thapelo) | 3 | 3 | 425 | 3 | 3 | 425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1182.7 | 1607.7 | 1186.6 | 1607.7 | 0 | 0 | 0 | 0 | ||||||
| 2 | Marx ,EF (Ethen Frederik) | 2 | 1.5 | 212.5 | 2 | 1.5 | 212.5 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1242.2 | 1454.7 | 1245.8 | 1454.7 | 0 | 0 | 0 | 0 | ||||||
| 3 | Maritz ,W (Waldo Hermann) | 2 | 1 | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1344.8 | 1344.8 | 1336.9 | 1344.8 | 0 | 0 | 0 | 0 | ||||||
| 4 | Lekgoba ,R (Rethabile Ellen) | 2 | 2 | 425 | 2 | 2 | 425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1454.4 | 1879.4 | 1452.8 | 1879.4 | 0 | 0 | 0 | 0 | ||||||
| 5 | Magagula ,S (Siyabonga) | 1 | 1 | 425 | 1 | 1 | 425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1206.3 | 1631.3 | 1207.2 | 1631.3 | 0 | 0 | 0 | 0 | ||||||
| 6 | Makhubalo ,I (Inam) | 1 | 1 | 425 | 1 | 1 | 425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1149.9 | 1574.9 | 1139.6 | 1574.9 | 0 | 0 | 0 | 0 | ||||||
| 7 | Brits ,C (Chantelle) | 1 | 0 | -425 | 1 | 0 | -425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1200 | 775 | 1200 | 775 | 0 | 0 | 0 | 0 | ||||||
| 8 | Maseko ,T (Tshiamo) | 1 | 0 | -425 | 1 | 0 | -425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1420.5 | 995.5 | 1415.1 | 995.5 | 0 | 0 | 0 | 0 | ||||||
| 9 | Masiu ,K (Karabo) | 1 | 1 | 425 | 1 | 1 | 425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1200 | 1625 | 1200 | 1625 | 0 | 0 | 0 | 0 | ||||||
| 10 | Monyemoratho ,L (Lucky Leffa) | 1 | 0.5 | 0 | 1 | 0.5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1299.5 | 1299.5 | 1313.9 | 1299.5 | 0 | 0 | 0 | 0 | ||||||
Norms
| # | Norm | Tournament | Start | End | Rounds | Games | Score | Details |
|---|---|---|---|---|---|---|---|---|