PLAYER PAGE
Personal

Grobler, J (Joshua)
Chess SA id
1130134049FIDE id
?Date of birth
2013-05-15 (U14)Gender
MaleRegion
Tshwane (GTP)Citizen
RSATitles
Chess SA registered
YesLast active game
2025-08-10Personal details last changed
1900-01-01Junior GPX Games
72Junior GPX Points
1423.8Item | Main | Standard | Rapid | Blitz |
---|---|---|---|---|
Rating | 1483.7 | 1478.2 | 1200 | 1200 |
Raw rating | 1483.7 | 1478.2 | 1200 | 1200 |
Weighted rating | 1363.4 | 1361 | 1200 | 1200 |
Weighted performance | 1457.2 | 1452.3 | 0 | 0 |
Floor | 983.7 | 978.2 | 700 | 700 |
K-factor | 32 | 32 | 36 | 36 |
Min/Max rating change allowed | 110.7 | 111.5 | 165.8 | 165.8 |
Highest rating | 1483.72025-09-01 | 1478.22025-09-01 | 12002018-10-01 | 12002018-10-01 |
Highest raw rating | 1483.72025-09-01 | 1478.22025-09-01 | 12002024-02-01 | 12002024-02-01 |
Highest weighted rating | 1347.82025-09-01 | 1345.72025-09-01 | 12002018-10-01 | 12002018-10-01 |
Highest weighted performance | 1472.12025-09-01 | 1467.12025-09-01 | 12002024-02-01 | 12002024-02-01 |
Prediction | ||||
---|---|---|---|---|
Item | Main | Standard | Rapid | Blitz |
Rating change | 0 | 0 | 0 | 0 |
New rating | 1483.7 | 1478.2 | 1200 | 1200 |
Analysis | ||||
Rating | 1483.7 | 1478.2 | 1200 | 1200 |
Raw rating | 1483.7 | 1478.2 | 1200 | 1200 |
Weighted rating | 1363.4 | 1361 | 1200 | |
Weighted performance | 1457.2 | 1452.3 | 0 | |
K-factor | 32 | 32 | 36 | 36 |
Floor | 983.7 | 978.2 | 700 | 700 |
Max/Min rating change allowed | 110.7 | 111.5 | 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 | 1483.7 | 1478.2 | 1200 | 1200 |
New weighted rating | 1377.9 | 1375.2 | 1200 | 1200 |
New weighted performance | 1456.7 | 1451.8 | 0 | 0 |
Temp new rating | 1483.7 | 1478.2 | 1200 | 1200 |
Temp new rating +/- | 0 | 0 | 0 | 0 |
Final new rating +/- | 0 | 0 | 0 | 0 |
New rating | 1483.7 | 1478.2 | 1200 | 1200 |
New K-factor | 32 | 32 | 36 | 36 |
New floor | 983.7 | 978.2 | 700 | 700 |
Item | Main | Standard | Rapid | Blitz |
---|---|---|---|---|
0 | 0 | 0 | 0 | |
58 | 58 | 0 | 0 | |
34 | 34 | 0 | 0 | |
10 | 10 | 0 | 0 | |
10 | 10 | 0 | 0 | |
10 | 10 | 0 | 0 | |
History | 122 | 122 | 0 | 0 |
Games since | |||||||||||||||||
Main92 | Standard92 | Rapid0 | Blitz0 | ||||||||||||||
Gender | Male | ||||||||||||||||
Age group | U14 | ||||||||||||||||
Region | Tshwane (GTP) | ||||||||||||||||
Province | Gauteng (GT) | ||||||||||||||||
Main | RSA | Province | Region | ||||||||||||||
Overall | 1382 | 474 | 175 | ||||||||||||||
Male | 1181 | 397 | 141 | ||||||||||||||
U14 | 198 | 63 | 20 | ||||||||||||||
U14 Male | 160 | 53 | 16 | ||||||||||||||
Standard | RSA | Province | Region | ||||||||||||||
Overall | 1341 | 490 | 183 | ||||||||||||||
Male | 1134 | 408 | 149 | ||||||||||||||
U14 | 197 | 62 | 21 | ||||||||||||||
U14 Male | 155 | 51 | 17 | ||||||||||||||
Rapid | RSA | Province | Region | ||||||||||||||
Overall | -1 | -1 | -1 | ||||||||||||||
Male | -1 | -1 | -1 | ||||||||||||||
U14 | -1 | -1 | -1 | ||||||||||||||
U14 Male | -1 | -1 | -1 | ||||||||||||||
Blitz | RSA | Province | Region | ||||||||||||||
Overall | -1 | -1 | -1 | ||||||||||||||
Male | -1 | -1 | -1 | ||||||||||||||
U14 | -1 | -1 | -1 | ||||||||||||||
U14 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 | 58 | 35.5 | 61.21 | 95.3 | 1368 | 1463.2 |
Standard | 58 | 35.5 | 61.21 | 95.3 | 1368 | 1463.2 |
Rapid | 0 | 0 | 0 | 0 | 0 | 0 |
Blitz | 0 | 0 | 0 | 0 | 0 | 0 |
History | ||||||
Games | Score | % | Dp | AvgOpp | Performance | |
Main | 122 | 65 | 53.28 | 27.9 | 1315.7 | 1343.5 |
Standard | 122 | 65 | 53.28 | 27.9 | 1315.7 | 1343.5 |
Rapid | 0 | 0 | 0 | 0 | 0 | 0 |
Blitz | 0 | 0 | 0 | 0 | 0 | 0 |
Date | Main | Standard | Rapid | Blitz |
2025-09-30 | 1483.7 | 1478.2 | 1200 | 1200 |
2025-09-01 | 1483.7 | 1478.2 | 1200 | 1200 |
2025-08-01 | 1475.4 | 1468.2 | 1200 | 1200 |
2025-07-01 | 1402.3 | 1395 | 1200 | 1200 |
2025-06-01 | 1467.9 | 1468 | 1200 | 1200 |
2025-05-01 | 1452.4 | 1447.3 | 1200 | 1200 |
2025-04-01 | 1461.3 | 1457.2 | 1200 | 1200 |
2025-03-01 | 1379.6 | 1378.4 | 1200 | 1200 |
2025-02-01 | 1343.9 | 1341.8 | 1200 | 1200 |
2025-01-01 | 1305.6 | 1302.6 | 1200 | 1200 |
2024-12-01 | 1305.6 | 1302.6 | 1200 | 1200 |
2024-11-01 | 1239.9 | 1237 | 1200 | 1200 |
2024-10-01 | 1231.3 | 1234.1 | 1200 | 1200 |
2024-09-01 | 1201.7 | 1198.8 | 1200 | 1200 |
2024-08-01 | 1259.1 | 1270.8 | 1200 | 1200 |
2024-07-01 | 1259.1 | 1270.8 | 1200 | 1200 |
2024-06-01 | 1259.1 | 1270.8 | 1200 | 1200 |
2024-08-01 | 1196.7 | 1196 | 1200 | 1200 |
2024-04-01 | 1196.7 | 1196 | 1200 | 1200 |
2024-03-01 | 1196.7 | 1196 | 1200 | 1200 |
2024-02-01 | 1163.8 | 1154.4 | 1200 | 1200 |
2024-01-01 | 1163.8 | 1154.4 | 1200 | 1200 |
2023-12-01 | 1163.8 | 1154.4 | 1200 | 1200 |
2023-11-01 | 1163.8 | 1154.4 | 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 |
---|---|---|---|---|---|---|---|---|---|---|
1 | 2025 Etienne Lewis Closed Chess Tournament (U14) | 2025-08-08 | 2025-08-10 | Standard | Tshwane (GTP) | 7 | 7 | 5 | Yes | Analysis |
2 | South African Open 2025 (U14 Open) | 2025-07-03 | 2025-07-05 | Standard | Johannesburg Metro (GJM) | 5 | 5 | 4 | Yes | Analysis |
3 | 2025 Elise Steenkamp Open Chess Tournament (Queen) | 2025-06-14 | 2025-06-16 | Standard | Tshwane (GTP) | 7 | 6 | 1 | Yes | Analysis |
4 | 2025 Tshwane South School District Individual Finals (D4) (U13 Boys) | 2025-05-10 | 2025-05-10 | Standard | Tshwane (GTP) | 5 | 5 | 4 | Yes | Analysis |
5 | 2025 Silver Lakes Chess Club Open Chess Tournament (C) | 2025-05-03 | 2025-05-03 | Standard | Tshwane (GTP) | 5 | 5 | 3 | Yes | Analysis |
6 | 2025 Mid Gauteng Open Chess Tournament (C) | 2025-04-12 | 2025-04-12 | Standard | Tshwane (GTP) | 5 | 5 | 2.5 | Yes | Analysis |
7 | Lubowski Open 2025 (D1) | 2025-03-21 | 2025-03-22 | Standard | Tshwane (GTP) | 5 | 5 | 3 | Yes | Analysis |
8 | 2025 Prestige Open Chess Tournament (C) | 2025-03-08 | 2025-03-08 | Standard | Tshwane (GTP) | 5 | 5 | 4 | Yes | Analysis |
9 | Constantiapark Open 2025 (C) | 2025-02-15 | 2025-02-15 | Standard | Tshwane (GTP) | 5 | 5 | 2 | Yes | Analysis |
10 | 2025 Blou Bul Open Chess Tournament (D2) | 2025-02-08 | 2025-02-08 | Standard | Tshwane (GTP) | 5 | 5 | 4 | Yes | Analysis |
11 | 2025 Tshwane Chess OPEN Registration Tournament (B2) | 2025-01-25 | 2025-01-25 | Standard | Tshwane (GTP) | 5 | 5 | 3 | Yes | Analysis |
Last 500 tournaments since 01 January 2018
# | Tournament | Start | End | Type | Host | Rounds | Games | Score | Cfr | Analysis |
---|---|---|---|---|---|---|---|---|---|---|
1 | 2025 Etienne Lewis Closed Chess Tournament (U14) | 2025-08-08 | 2025-08-10 | Standard | Tshwane (GTP) | 7 | 7 | 5 | Yes | Analysis |
2 | South African Open 2025 (U14 Open) | 2025-07-03 | 2025-07-05 | Standard | Johannesburg Metro (GJM) | 5 | 5 | 4 | Yes | Analysis |
3 | 2025 Elise Steenkamp Open Chess Tournament (Queen) | 2025-06-14 | 2025-06-16 | Standard | Tshwane (GTP) | 7 | 6 | 1 | Yes | Analysis |
4 | 2025 Tshwane South School District Individual Finals (D4) (U13 Boys) | 2025-05-10 | 2025-05-10 | Standard | Tshwane (GTP) | 5 | 5 | 4 | Yes | Analysis |
5 | 2025 Silver Lakes Chess Club Open Chess Tournament (C) | 2025-05-03 | 2025-05-03 | Standard | Tshwane (GTP) | 5 | 5 | 3 | Yes | Analysis |
6 | 2025 Mid Gauteng Open Chess Tournament (C) | 2025-04-12 | 2025-04-12 | Standard | Tshwane (GTP) | 5 | 5 | 2.5 | Yes | Analysis |
7 | Lubowski Open 2025 (D1) | 2025-03-21 | 2025-03-22 | Standard | Tshwane (GTP) | 5 | 5 | 3 | Yes | Analysis |
8 | 2025 Prestige Open Chess Tournament (C) | 2025-03-08 | 2025-03-08 | Standard | Tshwane (GTP) | 5 | 5 | 4 | Yes | Analysis |
9 | Constantiapark Open 2025 (C) | 2025-02-15 | 2025-02-15 | Standard | Tshwane (GTP) | 5 | 5 | 2 | Yes | Analysis |
10 | 2025 Blou Bul Open Chess Tournament (D2) | 2025-02-08 | 2025-02-08 | Standard | Tshwane (GTP) | 5 | 5 | 4 | Yes | Analysis |
11 | 2025 Tshwane Chess OPEN Registration Tournament (B2) | 2025-01-25 | 2025-01-25 | Standard | Tshwane (GTP) | 5 | 5 | 3 | Yes | Analysis |
12 | Lardies Ope 2024 (U12) | 2024-10-26 | 2024-10-26 | Standard | Tshwane (GTP) | 5 | 5 | 3.5 | Yes | Analysis |
13 | Laerskool Doringkloof Primary Open Chess Tournament 2024 (U12) | 2024-10-19 | 2024-10-19 | Standard | Tshwane (GTP) | 5 | 5 | 1 | Yes | Analysis |
14 | 2024 Gauteng North Open Chess Tournament (U12) | 2024-10-05 | 2024-10-06 | Standard | Tshwane (GTP) | 5 | 4 | 2 | Yes | Analysis |
15 | Gauteng Schools Individuals Finals 2024 (U11 Boys) | 2024-08-16 | 2024-08-16 | Standard | Ekurhuleni (GE) | 5 | 5 | 3 | Yes | Analysis |
16 | D4 Tshwane South District Schools Teams Chess Tournament 2024 (U11A) | 2024-08-03 | 2024-08-03 | Standard | Tshwane (GTP) | 5 | 5 | 0 | Yes | Analysis |
17 | 2024 Tshwane South School District CLOSED Individual Championships (U11 Mixed) | 2024-05-11 | 2024-05-11 | Standard | Tshwane (GTP) | 5 | 5 | 4 | Yes | Analysis |
18 | 2024 Constantiapark Open (D2) | 2024-02-17 | 2024-02-17 | Standard | Tshwane (GTP) | 5 | 5 | 3 | Yes | Analysis |
19 | 2023 Tshwane South School District CLOSED League Championship (U11) | 2023-07-29 | 2023-07-29 | Standard | Tshwane (GTP) | 5 | 5 | 2 | Yes | Analysis |
20 | 2023 Tshwane South School District CLOSED Individual Championships (U11 Open) | 2023-04-22 | 2023-04-22 | Standard | Tshwane (GTP) | 5 | 5 | 2 | Yes | Analysis |
21 | D4 Play Offs 2022 (U9) | 2022-07-30 | 2022-07-30 | Standard | Tshwane (GTP) | 5 | 5 | 1.5 | Yes | Analysis |
22 | CP Ope 2022 (D2) | 2022-02-19 | 2022-02-19 | Standard | Tshwane (GTP) | 5 | 5 | 2.5 | Yes | Analysis |
23 | 2021 Chris Greyling Open Tournament (E) | 2021-05-08 | 2021-05-08 | Standard | Tshwane (GTP) | 5 | 5 | 3 | Yes | Analysis |
24 | 2021 Blou Bul Tournament (E) | 2021-04-10 | 2021-04-10 | Standard | Mangaung (FMB) | 5 | 5 | 2 | Yes | Analysis |
Top 3 Streaks
# | Games | Start | End | ||||||
---|---|---|---|---|---|---|---|---|---|
1 | 7 | Tournament2025 Prestige Open Chess Tournament | TournamentLubowski Open 2025 | ||||||
date2025-03-08 | rnd1 | typeStandard | result1 | date2025-03-21 | rnd2 | typeStandard | result1 | ||
OpponentEbersohn, G (Gerhard) | OpponentRamonyai, M (Maribe) | ||||||||
2 | 5 | TournamentSouth African Open 2025 | Tournament2025 Etienne Lewis Closed Chess Tournament | ||||||
date2025-07-03 | rnd2 | typeStandard | result1 | date2025-08-08 | rnd1 | typeStandard | result1 | ||
OpponentChemane, S (Sean Cheslin) | OpponentScheepers, T (Tristian) | ||||||||
3 | 5 | Tournament2025 Tshwane Chess OPEN Registration Tournament | Tournament2025 Blou Bul Open Chess Tournament | ||||||
date2025-01-25 | rnd4 | typeStandard | result1 | date2025-02-08 | rnd3 | typeStandard | result1 | ||
OpponentKruger, A (Adriaan) | OpponentRamonyai, M (Maribe) |
# | Games | Start | End | ||||||
---|---|---|---|---|---|---|---|---|---|
1 | 7 | Tournament2025 Prestige Open Chess Tournament | TournamentLubowski Open 2025 | ||||||
date2025-03-08 | rnd1 | typeStandard | result1 | date2025-03-21 | rnd2 | typeStandard | result1 | ||
OpponentEbersohn, G (Gerhard) | OpponentRamonyai, M (Maribe) | ||||||||
2 | 5 | TournamentSouth African Open 2025 | Tournament2025 Etienne Lewis Closed Chess Tournament | ||||||
date2025-07-03 | rnd2 | typeStandard | result1 | date2025-08-08 | rnd1 | typeStandard | result1 | ||
OpponentChemane, S (Sean Cheslin) | OpponentScheepers, T (Tristian) | ||||||||
3 | 5 | Tournament2025 Tshwane Chess OPEN Registration Tournament | Tournament2025 Blou Bul Open Chess Tournament | ||||||
date2025-01-25 | rnd4 | typeStandard | result1 | date2025-02-08 | rnd3 | typeStandard | result1 | ||
OpponentKruger, A (Adriaan) | OpponentRamonyai, M (Maribe) |
# | Games | Start | End |
---|
# | Games | Start | End |
---|
# | Games | Start | End | ||||||
---|---|---|---|---|---|---|---|---|---|
1 | 5 | TournamentSouth African Open 2025 | Tournament2025 Etienne Lewis Closed Chess Tournament | ||||||
date2025-07-03 | rnd2 | typeStandard | result1 | date2025-08-08 | rnd1 | typeStandard | result1 | ||
OpponentChemane, S (Sean Cheslin) | OpponentScheepers, T (Tristian) | ||||||||
2 | 5 | Tournament2025 Tshwane Chess OPEN Registration Tournament | Tournament2025 Blou Bul Open Chess Tournament | ||||||
date2025-01-25 | rnd4 | typeStandard | result1 | date2025-02-08 | rnd3 | typeStandard | result1 | ||
OpponentKruger, A (Adriaan) | OpponentRamonyai, M (Maribe) | ||||||||
3 | 3 | Tournament2025 Etienne Lewis Closed Chess Tournament | Tournament2025 Etienne Lewis Closed Chess Tournament | ||||||
date2025-08-09 | rnd3 | typeStandard | result1 | date2025-08-10 | rnd5 | typeStandard | result1 | ||
OpponentSnyman, J (Jacques) | OpponentDe Jager, K (Konrad) |
# | Games | Start | End | ||||||
---|---|---|---|---|---|---|---|---|---|
1 | 5 | TournamentSouth African Open 2025 | Tournament2025 Etienne Lewis Closed Chess Tournament | ||||||
date2025-07-03 | rnd2 | typeStandard | result1 | date2025-08-08 | rnd1 | typeStandard | result1 | ||
OpponentChemane, S (Sean Cheslin) | OpponentScheepers, T (Tristian) | ||||||||
2 | 5 | Tournament2025 Tshwane Chess OPEN Registration Tournament | Tournament2025 Blou Bul Open Chess Tournament | ||||||
date2025-01-25 | rnd4 | typeStandard | result1 | date2025-02-08 | rnd3 | typeStandard | result1 | ||
OpponentKruger, A (Adriaan) | OpponentRamonyai, M (Maribe) | ||||||||
3 | 3 | Tournament2025 Etienne Lewis Closed Chess Tournament | Tournament2025 Etienne Lewis Closed Chess Tournament | ||||||
date2025-08-09 | rnd3 | typeStandard | result1 | date2025-08-10 | rnd5 | typeStandard | result1 | ||
OpponentSnyman, J (Jacques) | OpponentDe Jager, K (Konrad) |
# | 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 | De Bruin ,H (Hanno) | 3 | 2.5 | 283.3 | 3 | 2.5 | 283.3 | 0 | 0 | 0 | 0 | 0 | 0 |
1162.5 | 1445.8 | 1155.2 | 1445.8 | 0 | 0 | 0 | 0 | ||||||
2 | Visser ,A (Aaron) | 2 | 2 | 425 | 2 | 2 | 425 | 0 | 0 | 0 | 0 | 0 | 0 |
1342.3 | 1767.3 | 1339.6 | 1767.3 | 0 | 0 | 0 | 0 | ||||||
3 | Ramonyai ,M (Maribe) | 2 | 2 | 425 | 2 | 2 | 425 | 0 | 0 | 0 | 0 | 0 | 0 |
1344.9 | 1769.9 | 1341.1 | 1769.9 | 0 | 0 | 0 | 0 | ||||||
4 | Vosloo ,D (De Waal) | 2 | 1 | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
1313 | 1313 | 1313.5 | 1313 | 0 | 0 | 0 | 0 | ||||||
5 | Snyman ,J (Jacques) | 2 | 1 | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
1276.2 | 1276.2 | 1279.3 | 1276.2 | 0 | 0 | 0 | 0 | ||||||
6 | Kirstein ,T (Tinus Ederich) | 2 | 1 | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
1478.8 | 1478.8 | 1464.9 | 1478.8 | 0 | 0 | 0 | 0 | ||||||
7 | Strauss ,L (Luné) | 2 | 0.5 | -212.5 | 2 | 0.5 | -212.5 | 0 | 0 | 0 | 0 | 0 | 0 |
1492.1 | 1279.6 | 1483.6 | 1279.6 | 0 | 0 | 0 | 0 | ||||||
8 | Scheepers ,T (Tristian) | 2 | 2 | 425 | 2 | 2 | 425 | 0 | 0 | 0 | 0 | 0 | 0 |
1241.4 | 1666.4 | 1246.9 | 1666.4 | 0 | 0 | 0 | 0 | ||||||
9 | Van Rooyen ,D (Dandre) | 2 | 2 | 425 | 2 | 2 | 425 | 0 | 0 | 0 | 0 | 0 | 0 |
1372.9 | 1797.9 | 1367.6 | 1797.9 | 0 | 0 | 0 | 0 | ||||||
10 | Jansen ,A (Alexia) | 2 | 1 | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
1412.4 | 1412.4 | 1411.2 | 1412.4 | 0 | 0 | 0 | 0 |
Norms
# | Norm | Tournament | Start | End | Rounds | Games | Score | Details |
---|---|---|---|---|---|---|---|---|