PLAYER PAGE
Dumisa Jacob Nkosi
182027949Ehlanzeni (MEN)Personal
Main rating
| Rating | 1813.1 |
| K-factor | 24 |
| Floor | 1369.5 |
| Highest | 1869.5 (2026-04-01) |
| Min/Max +/- allowed | 64 |
| Rating Change () | |
| Games | 14 |
| Score | 10 |
| We | 9.54 |
| SWe | 0.21 |
| Temp +/- | 5.1 |
| Penalties | 0 |
| Weight perform | 1728 |
| Final +/- | +5.1 |
| New Rating () | |
| Rating | 1818.2 |
| K-factor | 24 |
| Floor | 1369.5 |
| Highest | 1869.5 (2026-04-01) |
| Min/Max +/- allowed | 63.9 |
Standard rating
| Rating | 1891.6 |
| K-factor | 24 |
| Floor | 1405 |
| Highest | 1905 (2026-04-01) |
| Min/Max +/- allowed | 60.7 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 1824.5 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1891.6 |
| K-factor | 24 |
| Floor | 1405 |
| Highest | 1905 (2026-04-01) |
| Min/Max +/- allowed | 60.7 |
Rapid rating
| Rating | 1765.6 |
| K-factor | 24 |
| Floor | 1398.7 |
| Highest | 1898.7 (2024-03-01) |
| Min/Max +/- allowed | 61.3 |
| Rating Change () | |
| Games | 5 |
| Score | 3.5 |
| We | 3.74 |
| SWe | -0.24 |
| Temp +/- | -5.7 |
| Penalties | 0 |
| Weight perform | 1708 |
| Final +/- | -5.7 |
| New Rating () | |
| Rating | 1759.9 |
| K-factor | 24 |
| Floor | 1398.7 |
| Highest | 1898.7 (2024-03-01) |
| Min/Max +/- allowed | 61.3 |
Blitz rating
| Rating | 1717.5 |
| K-factor | 24 |
| Floor | 1346.4 |
| Highest | 1854.8 (2018-01-01) |
| Min/Max +/- allowed | 65.2 |
| Rating Change () | |
| Games | 9 |
| Score | 6.5 |
| We | 7.18 |
| SWe | -0.68 |
| Temp +/- | -16.4 |
| Penalties | 0 |
| Weight perform | 1764.9 |
| Final +/- | +47.4 |
| New Rating () | |
| Rating | 1764.9 |
| K-factor | 24 |
| Floor | 1346.4 |
| Highest | 1854.8 (2018-01-01) |
| Min/Max +/- allowed | 65.2 |
Rating Graph
Tournaments
| # | Tournament | Type | Start | End | Host | Rounds | Rating | Games | Score | Perform | Rat+/- | Details |
| 1 | Upperdeck Rapid 2026 | Rapid | 2026-08-23 | 2026-08-23 | Ehlanzeni (MEN) | 5 | 1813.1 | 5 | 3.5 | 1880.9 | 4.7 | Details |
| 2 | Upperdeck Blitz 2026 | Blitz | 2026-08-23 | 2026-08-23 | Ehlanzeni (MEN) | 9 | 1813.1 | 9 | 6.5 | 1783.6 | 0.4 | Details |
| # | Tournament | Type | Start | End | Host | Rounds | Rating | Games | Score | Perform | Rat+/- | Details |
| 1 | Rustique Chess Challenge 2026 (Rapid Platinum) | Rapid | 2026-07-01 | 2026-07-01 | Nkangala (MNW) | 5 | 1813.1 | 4 | 2 | 1847.4 | 0.2 | Details |
| 2 | Rustique Chess Challenge 2026 (Blitz) | Blitz | 2026-07-01 | 2026-07-01 | Nkangala (MNW) | 7 | 1813.1 | 7 | 5.5 | 2149.4 | 5.6 | Details |
| 3 | Knights Watch Winter Classic 2026 (A) | Standard | 2026-07-04 | 2026-07-05 | Johannesburg Metro (GJM) | 5 | 1821.3 | 4 | 1 | 1750.4 | -7.7 | Details |
| 4 | Upperdeck 2026 (Rapid) | Rapid | 2026-06-13 | 2026-06-13 | Ehlanzeni (MEN) | 5 | 1849 | 5 | 2 | 1602.3 | -15.8 | Details |
| 5 | Upperdeck 2026 (Blitz) | Blitz | 2026-06-13 | 2026-06-13 | Ehlanzeni (MEN) | 5 | 1849 | 5 | 2 | 1409.4 | -11.8 | Details |
| 6 | Middelburg Country Club 2026 (Rapid Platinum) | Rapid | 2026-05-09 | 2026-05-09 | Nkangala (MNW) | 6 | 1869.5 | 6 | 3 | 1461.8 | -24.6 | Details |
| 7 | Middelburg Country Club 2026 (Blitz) | Blitz | 2026-05-09 | 2026-05-09 | Nkangala (MNW) | 7 | 1869.5 | 7 | 5 | 1911.6 | 4 | Details |
| 8 | Mpumalanga Open Chess Championship 2026 (Prestige) | Standard | 2026-04-25 | 2026-04-26 | Nkangala (MNW) | 6 | 1816.7 | 6 | 4.5 | 2243 | 69.1 | Details |
| 9 | Lowveld High Chess Open 2026 (Open) | Standard | 2026-04-18 | 2026-04-18 | Ehlanzeni (MEN) | 5 | 1816.7 | 5 | 4 | 1716.9 | -11.7 | Details |
| 10 | KNIGHT@NHS 2026 (A) | Blitz | 2026-04-10 | 2026-04-10 | Ehlanzeni (MEN) | 5 | 1816.7 | 5 | 3 | 1440.8 | -4.5 | Details |
| 11 | Penryn Open Chess Tournament 2026 (A) | Standard | 2026-02-21 | 2026-02-21 | Ehlanzeni (MEN) | 5 | 1805.1 | 5 | 4.5 | 1898.6 | 11.5 | Details |
| 12 | 2025 Mzansi Individual Championships (Adult) | Classical | 2025-12-17 | 2025-12-20 | Nelson Mandela Bay (ENM) | 6 | 1819.9 | 6 | 4.5 | 1765 | -4.2 | Details |
| 13 | 2025 Mzansi Inter Provincial Team Championships (Adults) | Standard | 2025-12-15 | 2025-12-17 | Nelson Mandela Bay (ENM) | 6 | 1819.9 | 6 | 3 | 1696.2 | -15.8 | Details |
| 14 | Gatekeepers Round Robin 2025 | Standard | 2025-12-13 | 2025-12-13 | Nelson Mandela Bay (ENM) | 5 | 1819.9 | 5 | 3 | 1522.6 | -24.3 | Details |
| 15 | St Thomas Future Masters Challenge 2025 (High School+Adults) | Rapid | 2025-11-29 | 2025-11-29 | Nelson Mandela Bay (ENM) | 6 | 1820.6 | 6 | 4 | 1660.2 | -5.8 | Details |
| 16 | South African Open 2025 (Championship) | Classical | 2025-06-28 | 2025-07-05 | Johannesburg Metro (GJM) | 11 | 1819.9 | 10 | 0.5 | 1449.1 | -87.2 | Details |
| 17 | Moja Chess Extravaganza 2025 (B) | Classical | 2025-04-26 | 2025-05-01 | Johannesburg Metro (GJM) | 9 | 1827.2 | 9 | 5.5 | 1748.1 | -11.6 | Details |
| 18 | Moja Chess Extravaganza 2025 (Blitz) | Blitz | 2025-04-26 | 2025-04-26 | Johannesburg Metro (GJM) | 7 | 1827.2 | 6 | 4 | 1801.1 | -0.4 | Details |
| 19 | Pearson High Chess Festival 2025 (A) | Standard | 2025-02-21 | 2025-02-22 | Nelson Mandela Bay (ENM) | 5 | 1827.2 | 0 | 0 | 0 | 0 | Details |
| 20 | 7th Annual UFH Heritage Open 2024 (A) | Standard | 2024-09-21 | 2024-09-22 | Amathole (EAL) | 7 | 1825 | 7 | 4 | 1823.7 | -0.9 | Details |
| 21 | 2024 UCC Mind Over Board (A) | Classical | 2024-08-30 | 2024-09-01 | Nelson Mandela Bay (ENM) | 5 | 1825 | 5 | 3.5 | 1821.8 | 2.8 | Details |
| 22 | Spartan Bishops Chess Championships 2024 (Kings) | Standard | 2024-05-04 | 2024-05-05 | Bojanala Platina (NBR) | 5 | 1807.9 | 4 | 2 | 1852.9 | 3.5 | Details |
| 23 | Fountains Mall 2024 (Open) | Standard | 2024-05-17 | 2024-05-18 | Sarah Baartman (ESB) | 6 | 1807.9 | 6 | 4.5 | 1905.5 | 10.8 | Details |
| 24 | UFH Heritage Open 2024 (A) | Standard | 2024-03-30 | 2024-03-31 | Amathole (EAL) | 6 | 1823.7 | 6 | 4.5 | 1790.2 | -3.9 | Details |
| 25 | UCC Strategic Moves 2024 (A) | Standard | 2024-03-08 | 2024-03-09 | Nelson Mandela Bay (ENM) | 5 | 1823.7 | 5 | 3.5 | 1734.5 | -5.5 | Details |
| 26 | Madibaz Chess Tournament 2024 (A) | Standard | 2024-03-01 | 2024-03-02 | Nelson Mandela Bay (ENM) | 5 | 1823.7 | 5 | 3.5 | 1733.8 | -3.8 | Details |
| 27 | YCA Otto Du Plessis Rapid 2024 (A) | Rapid | 2024-02-03 | 2024-02-03 | Nelson Mandela Bay (ENM) | 5 | 1778.8 | 5 | 5 | 1965.4 | 10.8 | Details |
| 28 | Pearson Open Chess Tournament 2024 (A) | Standard | 2024-02-23 | 2024-02-24 | Nelson Mandela Bay (ENM) | 5 | 1778.8 | 5 | 5 | 2055.9 | 26.6 | Details |
| 29 | Eastern Cape Provincial Individual Championship 2023 (Open) | Standard | 2023-10-05 | 2023-10-06 | Nelson Mandela Bay (ENM) | 7 | 1810.3 | 6 | 5 | 1790.3 | 1.5 | Details |
| 30 | Eastern Cape Chess Team Championship 2023 (Open) | Standard | 2023-10-07 | 2023-10-08 | Sarah Baartman (ESB) | 5 | 1810.3 | 4 | 1.5 | 1408.1 | -30.4 | Details |
| 31 | UFH Heritage Open 2023 (A Playoffs) | Blitz | 2023-09-24 | 2023-09-24 | Amathole (EAL) | 6 | 1816.6 | 6 | 4 | 1854 | 1 | Details |
| 32 | UFH Heritage Open 2023 (A) | Standard | 2023-09-23 | 2023-09-24 | Amathole (EAL) | 6 | 1816.6 | 6 | 4.5 | 1746.8 | -6.4 | Details |
| 33 | Uitenhage Chess Club Grand Prix 2023 (A) | Standard | 2023-08-25 | 2023-08-26 | Nelson Mandela Bay (ENM) | 5 | 1811 | 5 | 4.5 | 1841.1 | 8.5 | Details |
| 34 | NMBCU Closed 2023 (Adults) | Standard | 2023-08-11 | 2023-08-12 | Nelson Mandela Bay (ENM) | 6 | 1811 | 6 | 5.5 | 1685.9 | -4 | Details |
| 35 | NMBCU Trial 4 2023 (U20+Open) | Standard | 2023-07-28 | 2023-07-29 | Nelson Mandela Bay (ENM) | 5 | 1806.4 | 5 | 4.5 | 1710.4 | 3.8 | Details |
| 36 | Fountains Mall Open 2023 (A) | Standard | 2023-05-12 | 2023-05-13 | Sarah Baartman (ESB) | 6 | 1794.8 | 6 | 4.5 | 1801.5 | 5 | Details |
| 37 | EP Trials 3 2023 (Open) | Standard | 2023-05-05 | 2023-05-06 | Nelson Mandela Bay (ENM) | 6 | 1794.8 | 6 | 6 | 1742.5 | 5 | Details |
| 38 | Youth Chess Acadamy Rapid Tournament 2023 (A) | Rapid | 2023-03-11 | 2023-03-11 | Nelson Mandela Bay (ENM) | 5 | 1794.5 | 5 | 4 | 1739.1 | 0.2 | Details |
| 39 | NMB 1st Trials 2023 (Adults) | Standard | 2023-02-17 | 2023-02-18 | Nelson Mandela Bay (ENM) | 6 | 1778 | 6 | 6 | 1843.3 | 13.8 | Details |
| 40 | The Team Battle 2022 (A) | Rapid | 2022-11-19 | 2022-11-19 | Sarah Baartman (ESB) | 7 | 1767.2 | 6 | 6 | 1868.3 | 9 | Details |
| 41 | EC Players Individual Championship 2022 (A) | Standard | 2022-10-08 | 2022-10-09 | Sarah Baartman (ESB) | 5 | 1755.6 | 5 | 4 | 1805.6 | 9.7 | Details |
| 42 | 2022 Madibaz Tournament (Open) | Classical | 2022-09-09 | 2022-09-11 | Nelson Mandela Bay (ENM) | 5 | 1787.2 | 5 | 2.5 | 1631.7 | -19 | Details |
| 43 | 2022 Madibaz Tournament (Open Blitz) | Blitz | 2022-09-09 | 2022-09-09 | Nelson Mandela Bay (ENM) | 7 | 1787.2 | 6 | 3 | 1450.7 | -7.5 | Details |
| 44 | 2022 Westering Tournament (Rapid) | Rapid | 2022-08-27 | 2022-08-27 | Nelson Mandela Bay (ENM) | 5 | 1773.2 | 5 | 4 | 1599.4 | -2.2 | Details |
| 45 | 2022 Westering Tournament (Blitz) | Blitz | 2022-08-27 | 2022-08-27 | Nelson Mandela Bay (ENM) | 7 | 1773.2 | 7 | 6.5 | 1774.7 | 2.2 | Details |
| 46 | 2022 NMBCU Closed 2022 (U20+Adults) | Standard | 2022-08-19 | 2022-08-20 | Nelson Mandela Bay (ENM) | 5 | 1773.2 | 5 | 4 | 1653.8 | -5.5 | Details |
| 47 | 2022 NMBCU Trial 4 (U20+Adult) | Standard | 2022-08-12 | 2022-08-13 | Nelson Mandela Bay (ENM) | 6 | 1773.2 | 6 | 6 | 1876.9 | 17.6 | Details |
| 48 | NMBCU Trial 3 2022 (Adults) | Standard | 2022-07-22 | 2022-07-23 | Nelson Mandela Bay (ENM) | 6 | 1765.4 | 6 | 5 | 1763.8 | 6.6 | Details |
| 49 | Fountains Mall Open Tournament 2022 (A) | Standard | 2022-05-13 | 2022-05-14 | Sarah Baartman (ESB) | 5 | 1765.4 | 0 | 0 | 0 | 0 | Details |
| 50 | Makhanda Open Chess Tournament 2022 (A) | Rapid | 2022-04-30 | 2022-04-30 | Sarah Baartman (ESB) | 6 | 1755.3 | 5 | 5 | 1784.6 | 8.5 | Details |
Game statistics ( )
| Games | 0 |
| Wins | 0 |
| Draws | 0 |
| Losses | 0 |
| White | 0 |
| Black | 0 |
| White wins | 0 |
| Black wins | 0 |
| Score | 0 |
| Percent | 0 |
| Dp | 0 |
| AOR | 0 |
| Performance | 0 |
Game statistics ()
| Games | 73 |
| Wins | 43 |
| Draws | 7 |
| Losses | 23 |
| White | 36 |
| Black | 37 |
| White wins | 24 |
| Black wins | 19 |
| Score | 46.5 |
| Percent | 63.7 |
| Dp | 116.4 |
| AOR | 1676 |
| Performance | 1792.4 |
Game statistics (History)
| Games | 484 |
| Wins | 302 |
| Draws | 59 |
| Losses | 123 |
| White | 243 |
| Black | 241 |
| White wins | 159 |
| Black wins | 143 |
| Score | 331.5 |
| Percent | 68.5 |
| Dp | 157.2 |
| AOR | 1579.9 |
| Performance | 1737.1 |
Rankings (Main)
| National | |
| Overall | 247 |
| Gender | 235 |
| Age group | 157 |
| Gender/Age | 150 |
| Provincial | |
| Overall | 1 |
| Gender | 1 |
| Age group | 1 |
| Gender/Age | 1 |
| Regional | |
| Overall | 1 |
| Gender | 1 |
| Age group | 1 |
| Gender/Age | 1 |
Rankings (Standard)
| National | |
| Overall | 150 |
| Gender | 146 |
| Age group | 98 |
| Gender/Age | 96 |
| Provincial | |
| Overall | 1 |
| Gender | 1 |
| Age group | 1 |
| Gender/Age | 1 |
| Regional | |
| Overall | 1 |
| Gender | 1 |
| Age group | 1 |
| Gender/Age | 1 |
Rankings (Rapid)
| National | |
| Overall | 61 |
| Gender | 61 |
| Age group | 42 |
| Gender/Age | 42 |
| Provincial | |
| Overall | 1 |
| Gender | 1 |
| Age group | 1 |
| Gender/Age | 1 |
| Regional | |
| Overall | 1 |
| Gender | 1 |
| Age group | 1 |
| Gender/Age | 1 |
Rankings (Blitz)
| National | |
| Overall | 71 |
| Gender | 70 |
| Age group | 45 |
| Gender/Age | 44 |
| Provincial | |
| Overall | 1 |
| Gender | 1 |
| Age group | 1 |
| Gender/Age | 1 |
| Regional | |
| Overall | 1 |
| Gender | 1 |
| Age group | 1 |
| Gender/Age | 1 |
Performance ( )
| Games | 0 |
| Score | 0 |
| Percent | 0 |
| Aor | 0 |
| Dp | 0 |
| Prat | 0 |
Performance ()
| Games | 73 |
| Score | 46.5 |
| Percent | 63.7 |
| Aor | 1676 |
| Dp | 116.4 |
| Prat | 1792.4 |
Performance (12 months)
| Games | 96 |
| Score | 61 |
| Percent | 63.5 |
| Aor | 1647.2 |
| Dp | 115.1 |
| Prat | 1762.4 |
Performance (History)
| Games | 484 |
| Score | 331.5 |
| Percent | 68.5 |
| Aor | 1579.9 |
| Dp | 157.2 |
| Prat | 1737.1 |
Top 5 opponents most often played
| Type | # | Opponent | Games | White | Black | First tournament | Last tournament | Details |
| Overall | 1 | Mhango, BF (Banele) | 19 | 10 | 9 | Rob Ferreira Hoerskool Open 2018 (Open) | Rustique Chess Challenge 2026 (Blitz) | Details |
| Overall | 2 | Peter, NM (Neathan Mninawa) | 11 | 6 | 5 | 2022 Madibaz Tournament (Open Blitz) | 2025 Mzansi Inter Provincial Team Championships (Adults) | Details |
| Overall | 3 | Maluleke, PE (Pfumelani Emmanuel) | 10 | 4 | 6 | Rob Ferreira Hoerskool Open 2018 (Open) | Lowveld High Chess Open 2026 (Open) | Details |
| Overall | 4 | Muller, K (Kaden) | 10 | 5 | 5 | SBDCU 2nd Open Tournament Fountains Mall 2022 (A) | NMBCU Closed 2023 (Adults) | Details |
| Overall | 5 | Odendaal, F (Frederick) | 8 | 3 | 5 | UFH Heritage Open 2021 (Blitz) | St Thomas Future Masters Challenge 2025 (High School+Adults) | Details |
| Standard | 1 | Mhango, BF (Banele) | 17 | 9 | 8 | Rob Ferreira Hoerskool Open 2018 (Open) | Bergvlam Tournament 2020 (Senior) | Details |
| Standard | 2 | Maluleke, PE (Pfumelani Emmanuel) | 10 | 4 | 6 | Rob Ferreira Hoerskool Open 2018 (Open) | Lowveld High Chess Open 2026 (Open) | Details |
| Standard | 3 | Gama, DD (Dalton) | 8 | 4 | 4 | Pienaar Chess Open 2018 (Open) | Uplands 2020 (Open) | Details |
| Standard | 4 | Peter, NM (Neathan Mninawa) | 8 | 5 | 3 | 2022 Madibaz Tournament (Open) | 2025 Mzansi Inter Provincial Team Championships (Adults) | Details |
| Standard | 5 | Maluka, MS (Mthobisi Sydwell) | 7 | 4 | 3 | Rob Ferreira Hoerskool Open 2018 (Open) | Bergvlam Tournament 2020 (Senior) | Details |
| Rapid | 1 | Muller, K (Kaden) | 3 | 2 | 1 | Makhanda Open Chess Tournament 2022 (A) | Youth Chess Acadamy Rapid Tournament 2023 (A) | Details |
| Rapid | 2 | Odendaal, F (Frederick) | 2 | 1 | 1 | 2021 Legends Rapid (A) | St Thomas Future Masters Challenge 2025 (High School+Adults) | Details |
| Rapid | 3 | Wolmarans, GM (Gregory) | 2 | 2 | 0 | Alekhine Chess Club Rapid 2021 | Youth Chess Acadamy Rapid Tournament 2023 (A) | Details |
| Rapid | 4 | Mafanya, K (Kulasande) | 2 | 0 | 2 | 2021 Legends Rapid (A) | Makhanda Open Chess Tournament 2022 (A) | Details |
| Rapid | 5 | Jacobs, KT (Kevin Terence) | 2 | 0 | 2 | Youth Chess Acadamy Rapid Tournament 2023 (A) | YCA Otto Du Plessis Rapid 2024 (A) | Details |
| Blitz | 1 | Tokoyi, R (Romeo) | 3 | 1 | 2 | UFH Heritage Open 2021 (Blitz) | UFH Heritage Open 2023 (A Playoffs) | Details |
| Blitz | 2 | Peter, NM (Neathan Mninawa) | 3 | 1 | 2 | 2022 Madibaz Tournament (Open Blitz) | UFH Heritage Open 2023 (A Playoffs) | Details |
| Blitz | 3 | Mkoko, S (Siphamandla) | 3 | 2 | 1 | UFH Heritage Open 2021 (Blitz) | UFH Heritage Open 2023 (A Playoffs) | Details |
| Blitz | 4 | Oatlhotse, P (Providence) | 2 | 0 | 2 | South African Junior Blitz 2018 (Open) | Rustique Chess Challenge 2026 (Blitz) | Details |
| Blitz | 5 | Phiri, A (Allie) | 2 | 1 | 1 | KNIGHT@NHS 2026 (A) | Upperdeck 2026 (Blitz) | Details |