PLAYER PAGE
Personal
Oberholster, G (Guilliaume Albertus J)
Chess SA id
1080142230FIDE id
?Date of birth
2008-03-06 (U20)Gender
MaleRegion
ZF Mgcawu (NZF)Citizen
RSATitles
Chess SA registered
NoLast active game
2025-11-01Personal details last changed
1900-01-01Junior GPX Games
Junior GPX Points
| Item | Main | Standard | Rapid | Blitz |
|---|---|---|---|---|
| Rating | 1481.4 | 1487.7 | 1200 | 1200 |
| Raw rating | 1481.4 | 1487.7 | 1200 | 1200 |
| Weighted rating | 1427.5 | 1427.2 | 1200 | 1200 |
| Weighted performance | 1357.8 | 1361.4 | 0 | 0 |
| Floor | 981.4 | 987.7 | 700 | 700 |
| K-factor | 32 | 32 | 36 | 36 |
| Min/Max rating change allowed | 111.1 | 110.1 | 165.8 | 165.8 |
| Highest rating | 1481.42025-11-30 | 1487.72025-11-30 | 12002018-10-01 | 12002018-10-01 |
| Highest raw rating | 1481.42025-11-30 | 1487.72025-11-30 | 12002024-02-01 | 12002024-02-01 |
| Highest weighted rating | 1466.52024-10-01 | 1470.42024-09-01 | 12002018-10-01 | 12002018-10-01 |
| Highest weighted performance | 1466.52025-06-01 | 1470.42023-08-01 | 12002024-02-01 | 12002024-02-01 |
| Prediction | ||||
|---|---|---|---|---|
| Item | Main | Standard | Rapid | Blitz |
| Rating change | 0 | 0 | 0 | 0 |
| New rating | 1481.4 | 1487.7 | 1200 | 1200 |
| Analysis | ||||
| Rating | 1481.4 | 1487.7 | 1200 | 1200 |
| Raw rating | 1481.4 | 1487.7 | 1200 | 1200 |
| Weighted rating | 1427.5 | 1427.2 | 1200 | |
| Weighted performance | 1357.8 | 1361.4 | 0 | |
| K-factor | 32 | 32 | 36 | 36 |
| Floor | 981.4 | 987.7 | 700 | 700 |
| Max/Min rating change allowed | 111.1 | 110.1 | 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 | 1481.4 | 1487.7 | 1200 | 1200 |
| New weighted rating | 1433.2 | 1433.5 | 1200 | 1200 |
| New weighted performance | 1348.1 | 1351.7 | 0 | 0 |
| Temp new rating | 1481.4 | 1487.7 | 1200 | 1200 |
| Temp new rating +/- | 0 | 0 | 0 | 0 |
| Final new rating +/- | 0 | 0 | 0 | 0 |
| New rating | 1481.4 | 1487.7 | 1200 | 1200 |
| New K-factor | 32 | 32 | 36 | 36 |
| New floor | 981.4 | 987.7 | 700 | 700 |
| Item | Main | Standard | Rapid | Blitz |
|---|---|---|---|---|
| 0 | 0 | 0 | 0 | |
| 28 | 28 | 0 | 0 | |
| 39 | 39 | 0 | 0 | |
| 25 | 25 | 0 | 0 | |
| 15 | 15 | 0 | 0 | |
| 0 | 0 | 0 | 0 | |
| History | 107 | 107 | 0 | 0 |
| Games since | |||||||||||||||||
| Main67 | Standard67 | Rapid0 | Blitz0 | ||||||||||||||
| Gender | Male | ||||||||||||||||
| Age group | U18 | ||||||||||||||||
| Region | ZF Mgcawu (NZF) | ||||||||||||||||
| Province | Northern Cape (NC) | ||||||||||||||||
| Main | RSA | Province | Region | ||||||||||||||
| Overall | 1405 | 35 | 3 | ||||||||||||||
| Male | 1190 | 28 | 1 | ||||||||||||||
| U18 | 223 | 8 | 1 | ||||||||||||||
| U18 Male | 197 | 7 | 1 | ||||||||||||||
| Standard | RSA | Province | Region | ||||||||||||||
| Overall | 1307 | 37 | 3 | ||||||||||||||
| Male | 1104 | 30 | 1 | ||||||||||||||
| U18 | 213 | 9 | 1 | ||||||||||||||
| U18 Male | 186 | 8 | 1 | ||||||||||||||
| Rapid | RSA | Province | Region | ||||||||||||||
| Overall | -1 | -1 | -1 | ||||||||||||||
| Male | -1 | -1 | -1 | ||||||||||||||
| U18 | -1 | -1 | -1 | ||||||||||||||
| U18 Male | -1 | -1 | -1 | ||||||||||||||
| Blitz | RSA | Province | Region | ||||||||||||||
| Overall | -1 | -1 | -1 | ||||||||||||||
| Male | -1 | -1 | -1 | ||||||||||||||
| U18 | -1 | -1 | -1 | ||||||||||||||
| U18 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 | 28 | 20.5 | 73.21 | 197.3 | 1264.1 | 1461.4 |
| Standard | 28 | 20.5 | 73.21 | 197.3 | 1264.1 | 1461.4 |
| Rapid | 0 | 0 | 0 | 0 | 0 | 0 |
| Blitz | 0 | 0 | 0 | 0 | 0 | 0 |
| History | ||||||
| Games | Score | % | Dp | AvgOpp | Performance | |
| Main | 107 | 68 | 63.55 | 115.2 | 1269.2 | 1384.4 |
| Standard | 107 | 68 | 63.55 | 115.2 | 1269.2 | 1384.4 |
| Rapid | 0 | 0 | 0 | 0 | 0 | 0 |
| Blitz | 0 | 0 | 0 | 0 | 0 | 0 |
| Date | Main | Standard | Rapid | Blitz |
| 2026-01-01 | 1481.4 | 1487.7 | 1200 | 1200 |
| 2025-11-30 | 1481.4 | 1487.7 | 1200 | 1200 |
| 2025-11-01 | 1466.5 | 1470.4 | 1200 | 1200 |
| 2025-09-30 | 1466.5 | 1470.4 | 1200 | 1200 |
| 2025-09-01 | 1466.5 | 1470.4 | 1200 | 1200 |
| 2025-08-01 | 1466.5 | 1470.4 | 1200 | 1200 |
| 2025-07-01 | 1466.5 | 1470.4 | 1200 | 1200 |
| 2025-06-01 | 1466.5 | 1470.4 | 1200 | 1200 |
| 2025-05-01 | 1379.7 | 1375 | 1200 | 1200 |
| 2025-04-01 | 1379.7 | 1375 | 1200 | 1200 |
| 2025-03-01 | 1378.6 | 1373.9 | 1200 | 1200 |
| 2025-02-01 | 1375.4 | 1370.5 | 1200 | 1200 |
| 2025-01-01 | 1332.8 | 1320 | 1200 | 1200 |
| 2024-12-01 | 1352 | 1338.9 | 1200 | 1200 |
| 2024-11-01 | 1349.6 | 1335.4 | 1200 | 1200 |
| 2024-10-01 | 1349.6 | 1335.4 | 1200 | 1200 |
| 2024-09-01 | 1427.6 | 1429.2 | 1200 | 1200 |
| 2024-11-01 | 1405.6 | 1406.5 | 1200 | 1200 |
| 2024-07-01 | 1406.7 | 1408.4 | 1200 | 1200 |
| 2024-06-01 | 1406.7 | 1408.4 | 1200 | 1200 |
| 2024-05-01 | 1383.3 | 1380.6 | 1200 | 1200 |
| 2024-04-01 | 1383.3 | 1380.6 | 1200 | 1200 |
| 2024-03-01 | 1383.3 | 1380.6 | 1200 | 1200 |
| 2024-02-01 | 1391.8 | 1389.6 | 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 | 2025 Veltie Royal Chess Tournament | 2025-10-31 | 2025-11-01 | Standard | ZF Mgcawu (NZF) | 5 | 3 | 3 | Yes | Analysis |
| 2 | Spartan Bishops Championships Elite 2025 (U18) | 2025-05-23 | 2025-05-25 | Standard | Frances Baard (NCF) | 5 | 5 | 3 | Yes | Analysis |
| 3 | 2025 ZFM Closed Chess Championship (U18) | 2025-05-09 | 2025-05-10 | Standard | ZF Mgcawu (NZF) | 5 | 4 | 4 | Yes | Analysis |
| 4 | Keimoes K & Q Chess Club Open 2025 (U18) | 2025-05-03 | 2025-05-03 | Standard | ZF Mgcawu (NZF) | 6 | 6 | 4.5 | Yes | Analysis |
| 5 | Grey College Team Championship 2025 (A) | 2025-02-21 | 2025-02-22 | Standard | Mangaung (FMB) | 5 | 5 | 3 | Yes | Analysis |
| 6 | Veltie Royal Klub Toernooi 31 Jan tot 1 Feb 2025 (A) | 2025-01-31 | 2025-02-01 | Standard | ZF Mgcawu (NZF) | 5 | 5 | 3 | Yes | Analysis |
| 7 | Mzansi Interprovincial Youth Chess Championships 2024 (U18 Open Championship) | 2024-12-16 | 2024-12-19 | Standard | Capricorn (LCP) | 7 | 7 | 2.5 | Yes | Analysis |
| 8 | Paarl Boys' High Chess Festival 2024 (Elite) | 2024-10-04 | 2024-10-05 | Standard | Cape Winelands (WCW) | 6 | 5 | 2.5 | Yes | Analysis |
| 9 | 2024 South Africa National Schools Chess Championship (U18 Boys) | 2024-09-27 | 2024-09-28 | Standard | Nelson Mandela Bay (ENM) | 7 | 7 | 1.5 | Yes | Analysis |
| 10 | 2024 NC Closed Chess Championships (U18+U20) | 2024-08-23 | 2024-08-25 | Standard | Frances Baard (NCF) | 5 | 5 | 4 | Yes | Analysis |
| 11 | 2024 Duineveld Open Toernooi (U16) | 2024-07-20 | 2024-07-20 | Standard | ZF Mgcawu (NZF) | 5 | 5 | 4 | Yes | Analysis |
| 12 | Spartan Bishops Chess Championships 2024 (Bishops) | 2024-05-04 | 2024-05-05 | Standard | Bojanala Platina (NBR) | 5 | 5 | 3.5 | Yes | Analysis |
| 13 | Grey College Team Championship 2024 (B) | 2024-02-23 | 2024-02-24 | Standard | Mangaung (FMB) | 5 | 5 | 3 | Yes | Analysis |
| 14 | Paarl Boys High Chess Festival 2023 (Elite Division) | 2023-10-13 | 2023-10-14 | Standard | Cape Winelands (WCW) | 6 | 5 | 1.5 | Yes | Analysis |
| 15 | 2023 Northern Cape Closed Chess Championships (U16 Open) | 2023-08-25 | 2023-08-27 | Standard | Frances Baard (NCF) | 5 | 5 | 4 | Yes | Analysis |
| 16 | ZFM Trials 2023 (U15 Boys) | 2023-06-03 | 2023-06-03 | Standard | ZF Mgcawu (NZF) | 5 | 5 | 4 | Yes | Analysis |
| 17 | Inter Regional Chess Championship 2023 (U16) | 2023-05-19 | 2023-05-20 | Standard | Mangaung (FMB) | 5 | 5 | 4 | Yes | Analysis |
| 18 | Grey College Team Championship 2023 (B) | 2023-02-03 | 2023-02-04 | Standard | Mangaung (FMB) | 5 | 5 | 3 | Yes | Analysis |
| 19 | Diamond Chess Academy Junior Championships 2022 (U15) | 2022-08-06 | 2022-08-06 | Standard | Frances Baard (NCF) | 5 | 5 | 3.5 | Yes | Analysis |
| 20 | Northern Cape Provincial Schools Trials 2022 (U15 Boys) | 2022-06-24 | 2022-06-24 | Standard | Frances Baard (NCF) | 5 | 5 | 3 | Yes | Analysis |
| 21 | ZFM Schools Trials 2022 (U15 Boys) | 2022-05-28 | 2022-05-28 | Standard | ZF Mgcawu (NZF) | 5 | 5 | 3.5 | Yes | Analysis |
Top 3 Streaks
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 6 | TournamentKeimoes K & Q Chess Club Open 2025 | TournamentSpartan Bishops Championships Elite 2025 | ||||||
| date2025-05-03 | rnd6 | typeStandard | result1 | date2025-05-23 | rnd1 | typeStandard | result1 | ||
| OpponentIglesias Giannantonio, M (Mario) | OpponentHendricks, G (Garryn) | ||||||||
| 2 | 6 | Tournament2024 Duineveld Open Toernooi | Tournament2024 NC Closed Chess Championships | ||||||
| date2024-07-20 | rnd2 | typeStandard | result1 | date2024-08-24 | rnd2 | typeStandard | result1 | ||
| OpponentMaloane, V (Valentino) | OpponentMaseti, J (Jeremy) | ||||||||
| 3 | 5 | TournamentGrey College Team Championship 2025 | TournamentKeimoes K & Q Chess Club Open 2025 | ||||||
| date2025-02-22 | rnd5 | typeStandard | result1 | date2025-05-03 | rnd4 | typeStandard | result1 | ||
| OpponentJansen Van Rensburg, N (Nicholas) | OpponentNel, C (Caleb) | ||||||||
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 6 | TournamentKeimoes K & Q Chess Club Open 2025 | TournamentSpartan Bishops Championships Elite 2025 | ||||||
| date2025-05-03 | rnd6 | typeStandard | result1 | date2025-05-23 | rnd1 | typeStandard | result1 | ||
| OpponentIglesias Giannantonio, M (Mario) | OpponentHendricks, G (Garryn) | ||||||||
| 2 | 6 | Tournament2024 Duineveld Open Toernooi | Tournament2024 NC Closed Chess Championships | ||||||
| date2024-07-20 | rnd2 | typeStandard | result1 | date2024-08-24 | rnd2 | typeStandard | result1 | ||
| OpponentMaloane, V (Valentino) | OpponentMaseti, J (Jeremy) | ||||||||
| 3 | 5 | TournamentGrey College Team Championship 2025 | TournamentKeimoes K & Q Chess Club Open 2025 | ||||||
| date2025-02-22 | rnd5 | typeStandard | result1 | date2025-05-03 | rnd4 | typeStandard | result1 | ||
| OpponentJansen Van Rensburg, N (Nicholas) | OpponentNel, C (Caleb) | ||||||||
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 6 | TournamentKeimoes K & Q Chess Club Open 2025 | TournamentSpartan Bishops Championships Elite 2025 | ||||||
| date2025-05-03 | rnd6 | typeStandard | result1 | date2025-05-23 | rnd1 | typeStandard | result1 | ||
| OpponentIglesias Giannantonio, M (Mario) | OpponentHendricks, G (Garryn) | ||||||||
| 2 | 6 | Tournament2024 Duineveld Open Toernooi | Tournament2024 NC Closed Chess Championships | ||||||
| date2024-07-20 | rnd2 | typeStandard | result1 | date2024-08-24 | rnd2 | typeStandard | result1 | ||
| OpponentMaloane, V (Valentino) | OpponentMaseti, J (Jeremy) | ||||||||
| 3 | 5 | TournamentZFM Trials 2023 | Tournament2023 Northern Cape Closed Chess Championships | ||||||
| date2023-06-03 | rnd4 | typeStandard | result1 | date2023-08-26 | rnd3 | typeStandard | result1 | ||
| OpponentFreeman, T (Tristan) | OpponentKritzinger, H (Henro) | ||||||||
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 6 | TournamentKeimoes K & Q Chess Club Open 2025 | TournamentSpartan Bishops Championships Elite 2025 | ||||||
| date2025-05-03 | rnd6 | typeStandard | result1 | date2025-05-23 | rnd1 | typeStandard | result1 | ||
| OpponentIglesias Giannantonio, M (Mario) | OpponentHendricks, G (Garryn) | ||||||||
| 2 | 6 | Tournament2024 Duineveld Open Toernooi | Tournament2024 NC Closed Chess Championships | ||||||
| date2024-07-20 | rnd2 | typeStandard | result1 | date2024-08-24 | rnd2 | typeStandard | result1 | ||
| OpponentMaloane, V (Valentino) | OpponentMaseti, J (Jeremy) | ||||||||
| 3 | 5 | TournamentZFM Trials 2023 | Tournament2023 Northern Cape Closed Chess Championships | ||||||
| date2023-06-03 | rnd4 | typeStandard | result1 | date2023-08-26 | rnd3 | typeStandard | result1 | ||
| OpponentFreeman, T (Tristan) | OpponentKritzinger, H (Henro) | ||||||||
| # | 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 | Seleko ,O (Onalenna) | 3 | 0 | -425 | 3 | 0 | -425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1492.7 | 1067.7 | 1489.8 | 1067.7 | 0 | 0 | 0 | 0 | ||||||
| 2 | Viviers ,H (Hanré) | 2 | 1 | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1146.8 | 1146.8 | 1134.1 | 1146.8 | 0 | 0 | 0 | 0 | ||||||
| 3 | Cloete ,A (Allison) | 2 | 0 | -425 | 2 | 0 | -425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 716.8 | 291.8 | 782.9 | 291.8 | 0 | 0 | 0 | 0 | ||||||
| 4 | Mwelwa ,P (Palo) | 2 | 1 | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1320.8 | 1320.8 | 1309.6 | 1320.8 | 0 | 0 | 0 | 0 | ||||||
| 5 | Green ,J (Jordan) | 2 | 2 | 425 | 2 | 2 | 425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1236 | 1661 | 1240.1 | 1661 | 0 | 0 | 0 | 0 | ||||||
| 6 | Du Plessis ,M (Marlon) | 2 | 1.5 | 212.5 | 2 | 1.5 | 212.5 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1249.1 | 1461.6 | 1257.2 | 1461.6 | 0 | 0 | 0 | 0 | ||||||
| 7 | May ,AD (Alrique Dominic) | 2 | 2 | 425 | 2 | 2 | 425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1293.2 | 1718.2 | 1295.9 | 1718.2 | 0 | 0 | 0 | 0 | ||||||
| 8 | Julius ,V (Valentio Ryan) | 2 | 2 | 425 | 2 | 2 | 425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1197.4 | 1622.4 | 1196.3 | 1622.4 | 0 | 0 | 0 | 0 | ||||||
| 9 | Louwrens ,C (Christo) | 2 | 2 | 425 | 2 | 2 | 425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1207.2 | 1632.2 | 1211.2 | 1632.2 | 0 | 0 | 0 | 0 | ||||||
| 10 | Benson ,J (Jefflene) | 2 | 2 | 425 | 2 | 2 | 425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1252 | 1677 | 1264.2 | 1677 | 0 | 0 | 0 | 0 | ||||||
Norms
| # | Norm | Tournament | Start | End | Rounds | Games | Score | Details |
|---|---|---|---|---|---|---|---|---|