PLAYER PAGE

Johannes Christiaan Corneli Botha

1110118128
Johannesburg Metro (GJM)
Personal
Main rating
Rating 1723.9
K-factor 28
Floor 1260.7
Highest 1760.7 (2026-06-01)
Min/Max +/- allowed 75
Rating Change
()
Games 10
Score 7.5
We 7.63
SWe -0.25
Temp +/- -6.9
Penalties 0
Weight perform 1616.7
Final +/- -6.9
New Rating
()
Rating 1717
K-factor 28
Floor 1260.7
Highest 1760.7 (2026-06-01)
Min/Max +/- allowed 74.6
Standard rating
Rating 1748.5
K-factor 24
Floor 1306.3
Highest 1806.3 (2026-03-01)
Min/Max +/- allowed 69.9
Rating Change
()
Games 5
Score 3
We 3.5
SWe -0.5
Temp +/- -12.1
Penalties 0
Weight perform 1635.1
Final +/- -12.1
New Rating
()
Rating 1736.4
K-factor 24
Floor 1306.3
Highest 1806.3 (2026-03-01)
Min/Max +/- allowed 69.9
Rapid rating
Rating 1396.7
K-factor 36
Floor 896.7
Highest 1396.7 (2026-06-01)
Min/Max +/- allowed 125.3
Rating Change
()
Games 5
Score 4.5
We 3.81
SWe 0.06
Temp +/- 2.3
Penalties 0
Weight perform 0
Final +/- +2.3
New Rating
()
Rating 1399
K-factor 36
Floor 899
Highest 1399 (2026-10-01)
Min/Max +/- allowed 124.9
Blitz rating
Rating 1362
K-factor 36
Floor 862
Highest 1362 (2025-11-01)
Min/Max +/- allowed 131.6
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 0
Final +/- 0
New Rating
()
Rating 1362
K-factor 36
Floor 862
Highest 1362 (2025-11-01)
Min/Max +/- allowed 131.6
Rating Graph
Tournaments
# Tournament Type Start End Host Rounds Rating Games Score Perform Rat+/- Details
1 Gauteng Closed Chess Championships 2026 (U16 Open) Standard 2026-10-17 2026-10-17 Ekurhuleni (GE) 5 1723.9 5 3 1655.9 -8.1 Details
2 Gauteng Top Schools Teams 2026 (U15 Open) Rapid 2026-08-28 2026-08-28 Ekurhuleni (GE) 5 1723.9 5 4.5 1656.6 1.2 Details
# Tournament Type Start End Host Rounds Rating Games Score Perform Rat+/- Details
1 JMC Closed 2026 (A) Standard 2026-08-01 2026-08-02 Johannesburg Metro (GJM) 5 1723.9 5 2.5 1826.2 19.8 Details
2 MCA Winter Chill Classic 2026 (Expert) Standard 2026-07-25 2026-07-25 Johannesburg Metro (GJM) 5 1734.9 5 1 1517.7 -30.7 Details
3 Ekurhuleni Open 2026 (A) Standard 2026-05-23 2026-05-23 Ekurhuleni (GE) 5 1760.7 5 2 1773 0.6 Details
4 JMC Helpmekaar 2026 (A) Standard 2026-05-31 2026-05-31 Johannesburg Metro (GJM) 5 1760.7 5 2 1573.6 -26.4 Details
5 JMC Crawford Sandton Rapid 2026 (Open) Rapid 2026-05-09 2026-05-09 Johannesburg Metro (GJM) 5 1748.1 5 4 1866.2 12.6 Details
6 2026 Silver Lakes Open Chess Tournament (A) Standard 2026-03-07 2026-03-07 Tshwane (GTP) 5 1734.3 5 2 1718.5 -3.2 Details
7 Grey College Team Championship 2026 (Prestige) Standard 2026-02-20 2026-02-21 Mangaung (FMB) 5 1646.9 5 4 1913.5 25.7 Details
8 JCC ChessPowerHouse Feb Rapid 2026 (B) Rapid 2026-02-15 2026-02-15 Johannesburg Metro (GJM) 5 1646.9 5 3.5 1616.6 -1.4 Details
9 Ekurhuleni 1st Standard Tournament 2026 (C) Standard 2026-02-14 2026-02-14 Ekurhuleni (GE) 5 1646.9 5 5 1870.7 22.9 Details
10 EG Janesn Open 2026 (U15) Standard 2026-02-07 2026-02-07 Ekurhuleni (GE) 5 1646.9 5 5 1891.3 16.8 Details
11 Gauteng Inter-Region at Emerald Resort 2025 (U16 Championship) Standard 2025-12-06 2025-12-07 Sedibeng (GSV) 5 1623.5 5 3 1768 16.7 Details
12 Goue Liga Blitz 2025 Blitz 2025-10-25 2025-10-25 Johannesburg Metro (GJM) 9 1621.1 9 9 1689.2 4.4 Details
13 2025 Gauteng Top Schools Teams (U17) Standard 2025-08-30 2025-08-30 Tshwane (GTP) 5 1621.1 5 4 1591 -2.8 Details
14 Laerskool Eligwa Open 20 Sept 2025 (A+B) Standard 2025-09-20 2025-09-20 Sedibeng (GSV) 5 1641 5 2 1355.3 -27.7 Details
15 Tshwane Chess Club Clash 2025 (Open) Standard 2025-09-13 2025-09-13 Tshwane (GTP) 5 1641 5 2 1547.1 -8.5 Details
16 Sedibeng Chess Open 06 Sept 2025 (B) Standard 2025-09-06 2025-09-06 Sedibeng (GSV) 5 1641 4 4 1920.7 21.9 Details
17 JMC Closed 2025 (U16) Standard 2025-08-09 2025-08-10 Johannesburg Metro (GJM) 5 1613.5 5 4.5 1796.5 19.5 Details
18 JMC Helpmekaar 2025 (B) Standard 2025-06-01 2025-06-01 Johannesburg Metro (GJM) 5 1603.2 5 4 1682.9 7.3 Details
19 JMC Crawford Sandton 2025 (B) Standard 2025-05-10 2025-05-10 Johannesburg Metro (GJM) 5 1602.4 5 2.5 1420.6 -16.9 Details
20 2025 Silver Lakes Chess Club Open Chess Tournament (B) Standard 2025-05-03 2025-05-03 Tshwane (GTP) 5 1602.4 5 3.5 1661.2 5.1 Details
21 South African Junior Closed Chess Championships 2025 (U14 Open) Classical 2025-03-31 2025-04-05 Cape Winelands (WCW) 9 1601.5 9 4 1566.8 -8.2 Details
22 JMC Crawford Ruimsig 2025 (A) Standard 2025-03-01 2025-03-01 Johannesburg Metro (GJM) 5 1606.1 4 1 1501.3 -8.3 Details
23 Grey College Team Championship 2025 (B) Standard 2025-02-21 2025-02-22 Mangaung (FMB) 5 1632.8 5 4 1469 -14.1 Details
24 MCA Welcome 2025 (Expert) Standard 2025-02-15 2025-02-15 Johannesburg Metro (GJM) 5 1632.8 4 1 1571.8 -4.8 Details
25 Gauteng Inter-Region at UJ 2024 (U14 Open) Standard 2024-12-07 2024-12-08 Johannesburg Metro (GJM) 5 1666 5 1.5 1459.8 -23.6 Details
26 Gauteng Top Schools 2024 (U13 Open) Standard 2024-10-04 2024-10-04 Ekurhuleni (GE) 5 1665.3 5 4 1660.4 0.5 Details
27 Ekurhuleni North Schools Finals - Teams 2024 (U13 Open) Standard 2024-08-03 2024-08-03 Ekurhuleni (GE) 5 1597.4 5 5 1711.1 12.3 Details
28 Ekurhuleni Trails 3 2024 (U14) Standard 2024-08-24 2024-08-24 Ekurhuleni (GE) 5 1597.4 5 4 1571.5 -1.7 Details
29 Gauteng Schools Individuals Finals 2024 (U13 Boys) Standard 2024-08-16 2024-08-16 Ekurhuleni (GE) 5 1597.4 5 5 1886.6 28.9 Details
30 Ekurhuleni Trails 2 2024 (U14) Standard 2024-07-27 2024-07-27 Ekurhuleni (GE) 5 1588.7 4 3 1578.4 -0.5 Details
31 AG Visser Open 2024 (C) Standard 2024-06-08 2024-06-08 Sedibeng (GSV) 5 1467.3 5 4 1751 28.2 Details
32 Ekurhuleni Trails 1 2024 (U14) Standard 2024-06-01 2024-06-01 Ekurhuleni (GE) 5 1467.3 5 4 1595.5 13.4 Details
33 Ekurhuleni North Primary Schools District Individual Finals 2024 (U13 Boys) Standard 2024-05-11 2024-05-11 Ekurhuleni (GE) 5 1467.3 4 4 1633.4 13.3 Details
34 South African Junior Closed Chess Championship 2024 (U14 Open) Classical 2024-04-27 2024-05-01 Ekurhuleni (GE) 9 1564.1 9 2 1317.5 -51.4 Details
35 JMC Helpmekaar Kollege Tournament 2024 (B) Standard 2024-05-04 2024-05-04 Johannesburg Metro (GJM) 5 1564.1 5 2.5 1389.1 -17.8 Details
36 Westwood Open 2024 (A) Standard 2024-04-13 2024-04-13 Ekurhuleni (GE) 5 1572.5 4 3 1493.3 -6 Details
37 JNW Open - Classic - Crawford 2024 (B) Standard 2024-03-09 2024-03-09 Johannesburg Metro (GJM) 5 1564.8 5 4 1569 5.5 Details
38 2024 Constantiapark Open (B) Standard 2024-02-17 2024-02-17 Tshwane (GTP) 5 1576.7 5 2.5 1495.4 -8.6 Details
39 2024 Gauteng Inter-Region Chess Championship (U14A) Standard 2024-01-13 2024-01-14 Tshwane (GTP) 5 1581.5 5 3 1656.3 7.5 Details
40 JMC Kick Off Tournament 2024 (B) Standard 2024-01-28 2024-01-28 Johannesburg Metro (GJM) 5 1581.5 5 2.5 1475.4 -11 Details
41 2023 Gauteng Top Schools (U13 Mixed) Standard 2023-08-18 2023-08-18 West Rand (GWR) 5 1530.3 5 5 1795.4 26.7 Details
42 2023 Ekurhuleni North District Schools Finals (U13) Standard 2023-07-29 2023-07-29 Ekurhuleni (GE) 5 1516.6 5 4 1608.5 9.8 Details
43 Gauteng Open Arnold Classic 2023 (Open) Standard 2023-05-20 2023-05-21 Tshwane (GTP) 5 1534 4 0 1167.7 -32.5 Details
44 Gauteng Schools Individual Finals 2023 (U13 Boys) Standard 2023-05-26 2023-05-26 Ekurhuleni (GE) 5 1534 5 4 1566.7 2.7 Details
45 Ekurhuleni North Schools Individual Finals 2023 (U13 Boys) Standard 2023-05-12 2023-05-12 Ekurhuleni (GE) 5 1534 5 5 1699.8 17.1 Details
46 Ekurhuleni Trials 2 2023 (U14) Standard 2023-04-22 2023-04-22 Ekurhuleni (GE) 5 1569.9 5 4 1553 -0.5 Details
47 Alberton Chess Club Tournament 1 2023 (B) Standard 2023-04-15 2023-04-15 Ekurhuleni (GE) 5 1569.9 5 3 1394.1 -17.6 Details
48 2023 South African Junior Closed Chess Championships (U12 Open) Classical 2023-03-31 2023-04-04 Chess South Africa (CSA) 9 1569.9 9 5 1531.2 -7.2 Details
49 Ekhuruleni Chess Trials 1 2023 (U14) Standard 2023-03-25 2023-03-25 Ekurhuleni (GE) 5 1579.4 5 4 1497.9 -7 Details
50 2022 South African Junior Team Chess Championships (U12 Open) Classical 2022-12-04 2022-12-08 4 Knights (4K) 7 1558.1 7 6 1641.9 15 Details
Game statistics ( )
Games 5
Wins 3
Draws 0
Losses 2
White 2
Black 3
White wins 1
Black wins 2
Score 3
Percent 60
Dp 85
AOR 1570.9
Performance 1655.9
Game statistics ()
Games 60
Wins 36
Draws 5
Losses 19
White 32
Black 28
White wins 19
Black wins 17
Score 38.5
Percent 64.2
Dp 120.4
AOR 1619.6
Performance 1740
Game statistics (History)
Games 388
Wins 255
Draws 18
Losses 115
White 197
Black 191
White wins 131
Black wins 124
Score 264
Percent 68
Dp 153.4
AOR 1412.2
Performance 1565.6
Rankings (Main)
National
Overall 477
Gender 448
Age group 48
Gender/Age 41
Provincial
Overall 178
Gender 166
Age group 16
Gender/Age 14
Regional
Overall 76
Gender 68
Age group 7
Gender/Age 5
Rankings (Standard)
National
Overall 377
Gender 354
Age group 30
Gender/Age 24
Provincial
Overall 147
Gender 137
Age group 13
Gender/Age 11
Regional
Overall 58
Gender 52
Age group 6
Gender/Age 4
Rankings (Rapid)
National
Overall 1003
Gender 867
Age group 161
Gender/Age 129
Provincial
Overall 200
Gender 169
Age group 28
Gender/Age 19
Regional
Overall 83
Gender 74
Age group 6
Gender/Age 5
Rankings (Blitz)
National
Overall -1
Gender -1
Age group -1
Gender/Age -1
Provincial
Overall -1
Gender -1
Age group -1
Gender/Age -1
Regional
Overall -1
Gender -1
Age group -1
Gender/Age -1
Performance ( )
Games 5
Score 3
Percent 60
Aor 1570.9
Dp 85
Prat 1655.9
Performance ()
Games 60
Score 38.5
Percent 64.2
Aor 1619.6
Dp 120.4
Prat 1740
Performance (12 months)
Games 65
Score 41.5
Percent 63.8
Aor 1624.4
Dp 117.7
Prat 1742.1
Performance (History)
Games 388
Score 264
Percent 68
Aor 1412.2
Dp 153.4
Prat 1565.6
Top 5 opponents most often played
Type # Opponent Games White Black First tournament Last tournament Details
Overall 1 Tema, O (Ofana) 6 5 1 South African Junior Closed Chess Championships 2022 (U12 Open) EG Janesn Open 2026 (U15) Details
Overall 2 Robinson, E (Ethan) 6 5 1 Ekurhuleni-North Schools Finals Indiv 2022 (U11 Boys) Ekurhuleni 1st Standard Tournament 2026 (C) Details
Overall 3 Kalimashe, T (Tshireletso) 4 2 2 2022 Gauteng Schools Individual Chess Championship (U11 Boys) JCC ChessPowerHouse Feb Rapid 2026 (B) Details
Overall 4 Deysel, K (Kaleb) 4 2 2 South African Junior Closed Chess Championships 2022 (U12 Open) JMC Crawford Ruimsig 2025 (A) Details
Overall 5 Kotzee, A (Armand) 4 1 3 2022 Gauteng Schools Individual Chess Championship (U11 Boys) South African Junior Closed Chess Championship 2024 (U14 Open) Details
Standard 1 Tema, O (Ofana) 6 5 1 South African Junior Closed Chess Championships 2022 (U12 Open) EG Janesn Open 2026 (U15) Details
Standard 2 Robinson, E (Ethan) 6 5 1 Ekurhuleni-North Schools Finals Indiv 2022 (U11 Boys) Ekurhuleni 1st Standard Tournament 2026 (C) Details
Standard 3 Botha, CA (Cathri Amari) 4 2 2 2024 Constantiapark Open (B) Ekurhuleni 1st Standard Tournament 2026 (C) Details
Standard 4 Deysel, K (Kaleb) 4 2 2 South African Junior Closed Chess Championships 2022 (U12 Open) JMC Crawford Ruimsig 2025 (A) Details
Standard 5 Chipunza, J (Jared) 3 0 3 2023 South African Junior Closed Chess Championships (U12 Open) South African Junior Closed Chess Championships 2025 (U14 Open) Details