Surname or Chess SA id..
Chess SA Region AOC Mzansi 2026

PLAYER PAGE

Dumisa Jacob Nkosi

182027949
Ehlanzeni (MEN)
Personal
Main rating
Rating 1820.5
K-factor 24
Floor 1369.5
Highest 1869.5 (2026-04-01)
Min/Max +/- allowed 64
Rating Change
()
Games 8
Score 6
We 5.94
SWe 0.05
Temp +/- 1.2
Penalties 0
Weight perform 1831
Final +/- +10.5
New Rating
()
Rating 1831
K-factor 24
Floor 1369.5
Highest 1869.5 (2026-04-01)
Min/Max +/- allowed 63.9
Standard rating
Rating 1875.2
K-factor 24
Floor 1405
Highest 1905 (2026-04-01)
Min/Max +/- allowed 60.7
Rating Change
()
Games 8
Score 6
We 6.36
SWe -0.36
Temp +/- -8.7
Penalties 0
Weight perform 1860
Final +/- -8.7
New Rating
()
Rating 1866.5
K-factor 24
Floor 1405
Highest 1905 (2026-04-01)
Min/Max +/- allowed 60.7
Rapid rating
Rating 1759.9
K-factor 24
Floor 1398.7
Highest 1898.7 (2024-03-01)
Min/Max +/- allowed 61.3
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 1686.5
Final +/- 0
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 1756.6
K-factor 24
Floor 1346.4
Highest 1854.8 (2018-01-01)
Min/Max +/- allowed 65.2
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 1742.7
Final +/- 0
New Rating
()
Rating 1756.6
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 Mpumalanga Closed Championship 2026 (Adult) Standard 2026-09-26 2026-09-26 Gert Sibande (MGS) 5 1820.5 5 4.5 2008.7 23.1 Details
2 Chess Power House Heritage Day Open 2026 (A) Standard 2026-09-24 2026-09-24 Johannesburg Metro (GJM) 5 1820.5 3 1.5 1494.5 -21.8 Details
# Tournament Type Start End Host Rounds Rating Games Score Perform Rat+/- Details
1 Emalahleni Spring Open 2026 (A) Standard 2026-09-19 2026-09-20 Nkangala (MNW) 6 1813.1 6 3 1723.5 -8.2 Details
2 Laerskool Bergland Open 2026 (Open) Standard 2026-09-12 2026-09-12 Ehlanzeni (MEN) 5 1813.1 5 4 1894 10.5 Details
3 Upperdeck Rapid 2026 Rapid 2026-08-23 2026-08-23 Ehlanzeni (MEN) 5 1813.1 5 3.5 1880.9 4.7 Details
4 Upperdeck Blitz 2026 Blitz 2026-08-23 2026-08-23 Ehlanzeni (MEN) 9 1813.1 9 6.5 1783.6 0.4 Details
5 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
6 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
7 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
8 Upperdeck 2026 (Rapid) Rapid 2026-06-13 2026-06-13 Ehlanzeni (MEN) 5 1849 5 2 1602.3 -15.8 Details
9 Upperdeck 2026 (Blitz) Blitz 2026-06-13 2026-06-13 Ehlanzeni (MEN) 5 1849 5 2 1409.4 -11.8 Details
10 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
11 Middelburg Country Club 2026 (Blitz) Blitz 2026-05-09 2026-05-09 Nkangala (MNW) 7 1869.5 7 5 1911.6 4 Details
12 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
13 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
14 KNIGHT@NHS 2026 (A) Blitz 2026-04-10 2026-04-10 Ehlanzeni (MEN) 5 1816.7 5 3 1440.8 -4.5 Details
15 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
16 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
17 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
18 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
19 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
20 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
21 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
22 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
23 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
24 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
25 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
26 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
27 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
28 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
29 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
30 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
31 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
32 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
33 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
34 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
35 UFH Heritage Open 2023 (A Playoffs) Blitz 2023-09-24 2023-09-24 Amathole (EAL) 6 1816.6 6 4 1854 1 Details
36 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
37 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
38 NMBCU Closed 2023 (Adults) Standard 2023-08-11 2023-08-12 Nelson Mandela Bay (ENM) 6 1811 6 5.5 1685.9 -4 Details
39 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
40 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
41 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
42 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
43 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
44 The Team Battle 2022 (A) Rapid 2022-11-19 2022-11-19 Sarah Baartman (ESB) 7 1767.2 6 6 1868.3 9 Details
45 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
46 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
47 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
48 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
49 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
50 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
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 92
Wins 53
Draws 13
Losses 26
White 44
Black 48
White wins 28
Black wins 25
Score 59.5
Percent 64.7
Dp 124.7
AOR 1670.7
Performance 1795.5
Game statistics (History)
Games 503
Wins 312
Draws 65
Losses 126
White 251
Black 252
White wins 163
Black wins 149
Score 344.5
Percent 68.5
Dp 157.2
AOR 1582.6
Performance 1739.7
Rankings (Main)
National
Overall 229
Gender 216
Age group 150
Gender/Age 142
Provincial
Overall 4
Gender 3
Age group 4
Gender/Age 3
Regional
Overall 2
Gender 2
Age group 2
Gender/Age 2
Rankings (Standard)
National
Overall 164
Gender 158
Age group 109
Gender/Age 106
Provincial
Overall 2
Gender 2
Age group 2
Gender/Age 2
Regional
Overall 2
Gender 2
Age group 2
Gender/Age 2
Rankings (Rapid)
National
Overall 63
Gender 63
Age group 43
Gender/Age 43
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 64
Gender 63
Age group 44
Gender/Age 43
Provincial
Overall 2
Gender 2
Age group 2
Gender/Age 2
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 92
Score 59.5
Percent 64.7
Aor 1670.7
Dp 124.7
Prat 1795.5
Performance (12 months)
Games 115
Score 74
Percent 64.3
Aor 1647.8
Dp 122
Prat 1769.8
Performance (History)
Games 503
Score 344.5
Percent 68.5
Aor 1582.6
Dp 157.2
Prat 1739.7
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 Maluleke, PE (Pfumelani Emmanuel) 12 5 7 Rob Ferreira Hoerskool Open 2018 (Open) Upperdeck Rapid 2026 Details
Overall 3 Peter, NM (Neathan Mninawa) 11 6 5 2022 Madibaz Tournament (Open Blitz) 2025 Mzansi Inter Provincial Team Championships (Adults) Details
Overall 4 Muller, K (Kaden) 10 5 5 SBDCU 2nd Open Tournament Fountains Mall 2022 (A) NMBCU Closed 2023 (Adults) Details
Overall 5 Gama, DD (Dalton) 8 4 4 Pienaar Chess Open 2018 (Open) Uplands 2020 (Open) 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 Sgudhla, B (Bafana) 2 1 1 Upperdeck 2026 (Rapid) Upperdeck Rapid 2026 Details
Rapid 3 Jacobs, KT (Kevin Terence) 2 0 2 Youth Chess Acadamy Rapid Tournament 2023 (A) YCA Otto Du Plessis Rapid 2024 (A) Details
Rapid 4 Vundla, N (Mthandazo) 2 0 2 Upperdeck 2026 (Rapid) Upperdeck Rapid 2026 Details
Rapid 5 Bhila, E (Eddie) 2 1 1 Upperdeck 2026 (Rapid) Upperdeck Rapid 2026 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 Phiri, A (Allie) 3 2 1 KNIGHT@NHS 2026 (A) Upperdeck Blitz 2026 Details
Blitz 5 Sgudhla, B (Bafana) 2 2 0 Upperdeck 2026 (Blitz) Upperdeck Blitz 2026 Details