PLAYER PAGE

Johannes Christiaan Corneli Botha

1110118128
Johannesburg Metro (GJM)
Personal
Main rating
Rating 1760.7
K-factor 28
Floor 1260.7
Highest 1760.7 (2026-06-01)
Min/Max +/- allowed 75
Rating Change
()
Games 5
Score 2
We 3.14
SWe -0.94
Temp +/- -26.4
Penalties 0
Weight perform 1673.6
Final +/- -26.4
New Rating
()
Rating 1734.3
K-factor 28
Floor 1260.7
Highest 1760.7 (2026-06-01)
Min/Max +/- allowed 74.6
Standard rating
Rating 1806.3
K-factor 24
Floor 1306.3
Highest 1806.3 (2026-03-01)
Min/Max +/- allowed 69.9
Rating Change
()
Games 5
Score 2
We 3.3
SWe -1.3
Temp +/- -31.1
Penalties 0
Weight perform 1704.5
Final +/- -31.1
New Rating
()
Rating 1775.2
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 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 0
Final +/- 0
New Rating
()
Rating 1396.7
K-factor 36
Floor 896.7
Highest 1396.7 (2026-06-01)
Min/Max +/- allowed 125.3
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 JMC Helpmekaar 2026 (A) Standard 2026-05-31 2026-05-31 Johannesburg Metro (GJM) 5 1760.7 5 2 1573.6 -26.4 Details
# Tournament Type Start End Host Rounds Rating Games Score Perform Rat+/- Details
1 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
2 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
3 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
4 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
5 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
6 EG Janesn Open 2026 (U15) Standard 2026-02-07 2026-02-07 Ekurhuleni (GE) 5 1646.9 5 5 1891.3 16.8 Details
7 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
8 Goue Liga Blitz 2025 Blitz 2025-10-25 2025-10-25 Johannesburg Metro (GJM) 9 1621.1 9 9 1689.2 4.4 Details
9 2025 Gauteng Top Schools Teams (U17) Standard 2025-08-30 2025-08-30 Tshwane (GTP) 5 1621.1 5 4 1591 -2.8 Details
10 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
11 Tshwane Chess Club Clash 2025 (Open) Standard 2025-09-13 2025-09-13 Tshwane (GTP) 5 1641 5 2 1547.1 -8.5 Details
12 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
13 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
14 JMC Helpmekaar 2025 (B) Standard 2025-06-01 2025-06-01 Johannesburg Metro (GJM) 5 1603.2 5 4 1682.9 7.3 Details
15 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
16 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
17 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
18 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
19 Grey College Team Championship 2025 (B) Standard 2025-02-21 2025-02-22 Mangaung (FMB) 5 1632.8 5 4 1469 -14.1 Details
20 MCA Welcome 2025 (Expert) Standard 2025-02-15 2025-02-15 Johannesburg Metro (GJM) 5 1632.8 4 1 1571.8 -4.8 Details
21 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
22 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
23 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
24 Ekurhuleni Trails 3 2024 (U14) Standard 2024-08-24 2024-08-24 Ekurhuleni (GE) 5 1597.4 5 4 1571.5 -1.7 Details
25 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
26 Ekurhuleni Trails 2 2024 (U14) Standard 2024-07-27 2024-07-27 Ekurhuleni (GE) 5 1588.7 4 3 1578.4 -0.5 Details
27 AG Visser Open 2024 (C) Standard 2024-06-08 2024-06-08 Sedibeng (GSV) 5 1467.3 5 4 1751 28.2 Details
28 Ekurhuleni Trails 1 2024 (U14) Standard 2024-06-01 2024-06-01 Ekurhuleni (GE) 5 1467.3 5 4 1595.5 13.4 Details
29 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
30 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
31 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
32 Westwood Open 2024 (A) Standard 2024-04-13 2024-04-13 Ekurhuleni (GE) 5 1572.5 4 3 1493.3 -6 Details
33 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
34 2024 Constantiapark Open (B) Standard 2024-02-17 2024-02-17 Tshwane (GTP) 5 1576.7 5 2.5 1495.4 -8.6 Details
35 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
36 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
37 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
38 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
39 Gauteng Open Arnold Classic 2023 (Open) Standard 2023-05-20 2023-05-21 Tshwane (GTP) 5 1534 4 0 1167.7 -32.5 Details
40 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
41 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
42 Ekurhuleni Trials 2 2023 (U14) Standard 2023-04-22 2023-04-22 Ekurhuleni (GE) 5 1569.9 5 4 1553 -0.5 Details
43 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
44 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
45 Ekhuruleni Chess Trials 1 2023 (U14) Standard 2023-03-25 2023-03-25 Ekurhuleni (GE) 5 1579.4 5 4 1497.9 -7 Details
46 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
47 Super 8 Skaak 2022 (Seniors) Rapid 2022-10-14 2022-10-14 Bojanala Platina (NBR) 7 1555 6 5 1522.4 -2.2 Details
48 ACB Tournament 2022 (A) Standard 2022-10-07 2022-10-08 Ekurhuleni (GE) 5 1555 5 3 1587.7 4.5 Details
49 Ekurhuleni Chess Springs Club Open 2022 (C) Standard 2022-09-03 2022-09-03 Ekurhuleni (GE) 5 1575.7 5 3 1429.1 -14.8 Details
50 JMC 2nd Trials 2022 (B) Standard 2022-08-27 2022-08-27 Johannesburg Metro (GJM) 5 1576.9 1 0 900.7 -13.8 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 35
Wins 24
Draws 3
Losses 8
White 19
Black 16
White wins 11
Black wins 13
Score 25.5
Percent 72.9
Dp 194.3
AOR 1584.3
Performance 1778.6
Game statistics (History)
Games 363
Wins 243
Draws 16
Losses 104
White 184
Black 179
White wins 123
Black wins 120
Score 251
Percent 69.1
Dp 162.7
AOR 1394.6
Performance 1557.3
Rankings (Main)
National
Overall 342
Gender 319
Age group 25
Gender/Age 21
Provincial
Overall 125
Gender 115
Age group 10
Gender/Age 8
Regional
Overall 49
Gender 44
Age group 6
Gender/Age 4
Rankings (Standard)
National
Overall 243
Gender 231
Age group 13
Gender/Age 11
Provincial
Overall 91
Gender 87
Age group 6
Gender/Age 5
Regional
Overall 37
Gender 34
Age group 3
Gender/Age 2
Rankings (Rapid)
National
Overall 915
Gender 809
Age group 165
Gender/Age 139
Provincial
Overall 168
Gender 149
Age group 23
Gender/Age 17
Regional
Overall 84
Gender 79
Age group 7
Gender/Age 6
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 0
Score 0
Percent 0
Aor 0
Dp 0
Prat 0
Performance ()
Games 35
Score 25.5
Percent 72.9
Aor 1584.3
Dp 194.3
Prat 1778.6
Performance (12 months)
Games 73
Score 54
Percent 74
Aor 1514.4
Dp 203.8
Prat 1718.2
Performance (History)
Games 363
Score 251
Percent 69.1
Aor 1394.6
Dp 162.7
Prat 1557.3
Top 5 opponents most often played
Type # Opponent Games White Black First tournament Last tournament Details
Overall 1 Robinson, E (Ethan) 6 5 1 Ekurhuleni-North Schools Finals Indiv 2022 (U11 Boys) Ekurhuleni 1st Standard Tournament 2026 (C) Details
Overall 2 Tema, O (Ofana) 6 5 1 South African Junior Closed Chess Championships 2022 (U12 Open) EG Janesn Open 2026 (U15) Details
Overall 3 Deysel, K (Kaleb) 4 2 2 South African Junior Closed Chess Championships 2022 (U12 Open) JMC Crawford Ruimsig 2025 (A) Details
Overall 4 Kotzee, A (Armand) 4 1 3 2022 Gauteng Schools Individual Chess Championship (U11 Boys) South African Junior Closed Chess Championship 2024 (U14 Open) Details
Overall 5 Kalimashe, T (Tshireletso) 4 2 2 2022 Gauteng Schools Individual Chess Championship (U11 Boys) JCC ChessPowerHouse Feb Rapid 2026 (B) 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