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
2025-12-07Personal details last changed
1900-01-01Junior GPX Games
Junior GPX Points
| Item | Main | Standard | Rapid | Blitz |
|---|---|---|---|---|
| Rating | 1546.5 | 1542.9 | 1200 | 1200 |
| Raw rating | 1532.9 | 1533 | 1200 | 1200 |
| Weighted rating | 1410.5 | 1408.3 | 1200 | 1200 |
| Weighted performance | 1546.5 | 1542.9 | 0 | 0 |
| Floor | 1032.9 | 1033 | 700 | 700 |
| K-factor | 32 | 32 | 36 | 36 |
| Min/Max rating change allowed | 103.2 | 103.2 | 165.8 | 165.8 |
| Highest rating | 1546.52026-01-01 | 1542.92026-01-01 | 12002018-10-01 | 12002018-10-01 |
| Highest raw rating | 1532.92026-01-01 | 15332026-01-01 | 12002024-02-01 | 12002024-02-01 |
| Highest weighted rating | 1410.52026-01-01 | 1408.32026-01-01 | 12002018-10-01 | 12002018-10-01 |
| Highest weighted performance | 1546.52026-01-01 | 1542.92026-01-01 | 12002024-02-01 | 12002024-02-01 |
| Prediction | ||||
|---|---|---|---|---|
| Item | Main | Standard | Rapid | Blitz |
| Rating change | -10.4 | -9.9 | 0 | 0 |
| New rating | 1536.1 | 1533 | 1200 | 1200 |
| Analysis | ||||
| Rating | 1546.5 | 1542.9 | 1200 | 1200 |
| Raw rating | 1532.9 | 1533 | 1200 | 1200 |
| Weighted rating | 1410.5 | 1408.3 | 1200 | |
| Weighted performance | 1546.5 | 1542.9 | 0 | |
| K-factor | 32 | 32 | 36 | 36 |
| Floor | 1032.9 | 1033 | 700 | 700 |
| Max/Min rating change allowed | 103.2 | 103.2 | 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 | 1532.9 | 1533 | 1200 | 1200 |
| New weighted rating | 1425.4 | 1423.4 | 1200 | 1200 |
| New weighted performance | 1536.1 | 1532.5 | 0 | 0 |
| Temp new rating | 1536.1 | 1533 | 1200 | 1200 |
| Temp new rating +/- | -10.4 | -9.9 | 0 | 0 |
| Final new rating +/- | -10.4 | -9.9 | 0 | 0 |
| New rating | 1536.1 | 1533 | 1200 | 1200 |
| New K-factor | 32 | 32 | 36 | 36 |
| New floor | 1032.9 | 1033 | 700 | 700 |
| Item | Main | Standard | Rapid | Blitz |
|---|---|---|---|---|
| 0 | 0 | 0 | 0 | |
| 63 | 63 | 0 | 0 | |
| 34 | 34 | 0 | 0 | |
| 10 | 10 | 0 | 0 | |
| 10 | 10 | 0 | 0 | |
| 10 | 10 | 0 | 0 | |
| History | 127 | 127 | 0 | 0 |
| Games since | |||||||||||||||||
| Main97 | Standard97 | Rapid0 | Blitz0 | ||||||||||||||
| Gender | Male | ||||||||||||||||
| Age group | U14 | ||||||||||||||||
| Region | Tshwane (GTP) | ||||||||||||||||
| Province | Gauteng (GT) | ||||||||||||||||
| Main | RSA | Province | Region | ||||||||||||||
| Overall | 1249 | 430 | 160 | ||||||||||||||
| Male | 1069 | 360 | 133 | ||||||||||||||
| U14 | 172 | 55 | 18 | ||||||||||||||
| U14 Male | 136 | 42 | 15 | ||||||||||||||
| Standard | RSA | Province | Region | ||||||||||||||
| Overall | 1198 | 442 | 165 | ||||||||||||||
| Male | 1020 | 370 | 138 | ||||||||||||||
| U14 | 171 | 55 | 19 | ||||||||||||||
| U14 Male | 134 | 40 | 15 | ||||||||||||||
| 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 | 63 | 39.5 | 62.7 | 107.9 | 1367 | 1475 |
| Standard | 63 | 39.5 | 62.7 | 107.9 | 1367 | 1475 |
| Rapid | 0 | 0 | 0 | 0 | 0 | 0 |
| Blitz | 0 | 0 | 0 | 0 | 0 | 0 |
| History | ||||||
| Games | Score | % | Dp | AvgOpp | Performance | |
| Main | 127 | 69 | 54.33 | 36.8 | 1317.3 | 1354.1 |
| Standard | 127 | 69 | 54.33 | 36.8 | 1317.3 | 1354.1 |
| Rapid | 0 | 0 | 0 | 0 | 0 | 0 |
| Blitz | 0 | 0 | 0 | 0 | 0 | 0 |
| Date | Main | Standard | Rapid | Blitz |
| 2026-01-01 | 1532.9 | 1533 | 1200 | 1200 |
| 2025-11-30 | 1502.9 | 1501.3 | 1200 | 1200 |
| 2025-11-01 | 1502.9 | 1501.3 | 1200 | 1200 |
| 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 |
| 2024-11-01 | 1259.1 | 1270.8 | 1200 | 1200 |
| 2024-07-01 | 1259.1 | 1270.8 | 1200 | 1200 |
| 2024-06-01 | 1259.1 | 1270.8 | 1200 | 1200 |
| 2024-05-01 | 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 |
Comming soon.
Tournaments
| # | Tournament | Start | End | Type | Host | Rounds | Games | Score | Cfr | Analysis |
|---|
| # | Tournament | Start | End | Type | Host | Rounds | Games | Score | Cfr | Analysis |
|---|
Last 500 tournaments since 01 January 2018
| # | Tournament | Start | End | Type | Host | Rounds | Games | Score | Cfr | Analysis |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Gauteng Inter-Region at Emerald Resort 2025 (U14 Candidates) | 2025-12-06 | 2025-12-07 | Standard | Sedibeng (GSV) | 5 | 5 | 4 | Yes | Analysis |
| 2 | 2025 Gauteng Schools Provincial Individual Chess Championship (U13 Boys) | 2025-09-27 | 2025-09-27 | Standard | Tshwane (GTP) | 5 | 5 | 4 | Yes | Analysis |
| 3 | 2025 Etienne Lewis Closed Chess Tournament (U14) | 2025-08-08 | 2025-08-10 | Standard | Tshwane (GTP) | 7 | 7 | 5 | Yes | Analysis |
| 4 | South African Open 2025 (U14 Open) | 2025-07-03 | 2025-07-05 | Standard | Johannesburg Metro (GJM) | 5 | 5 | 4 | Yes | Analysis |
| 5 | 2025 Elise Steenkamp Open Chess Tournament (Queen) | 2025-06-14 | 2025-06-16 | Standard | Tshwane (GTP) | 7 | 6 | 1 | Yes | Analysis |
| 6 | 2025 Tshwane South School District Individual Finals (D4) (U13 Boys) | 2025-05-10 | 2025-05-10 | Standard | Tshwane (GTP) | 5 | 5 | 4 | Yes | Analysis |
| 7 | 2025 Silver Lakes Chess Club Open Chess Tournament (C) | 2025-05-03 | 2025-05-03 | Standard | Tshwane (GTP) | 5 | 5 | 3 | Yes | Analysis |
| 8 | 2025 Mid Gauteng Open Chess Tournament (C) | 2025-04-12 | 2025-04-12 | Standard | Tshwane (GTP) | 5 | 5 | 2.5 | Yes | Analysis |
| 9 | Lubowski Open 2025 (D1) | 2025-03-21 | 2025-03-22 | Standard | Tshwane (GTP) | 5 | 5 | 3 | Yes | Analysis |
| 10 | 2025 Prestige Open Chess Tournament (C) | 2025-03-08 | 2025-03-08 | Standard | Tshwane (GTP) | 5 | 5 | 4 | Yes | Analysis |
| 11 | Constantiapark Open 2025 (C) | 2025-02-15 | 2025-02-15 | Standard | Tshwane (GTP) | 5 | 5 | 2 | Yes | Analysis |
| 12 | 2025 Blou Bul Open Chess Tournament (D2) | 2025-02-08 | 2025-02-08 | Standard | Tshwane (GTP) | 5 | 5 | 4 | Yes | Analysis |
| 13 | 2025 Tshwane Chess OPEN Registration Tournament (B2) | 2025-01-25 | 2025-01-25 | Standard | Tshwane (GTP) | 5 | 5 | 3 | Yes | Analysis |
| 14 | Lardies Ope 2024 (U12) | 2024-10-26 | 2024-10-26 | Standard | Tshwane (GTP) | 5 | 5 | 3.5 | Yes | Analysis |
| 15 | Laerskool Doringkloof Primary Open Chess Tournament 2024 (U12) | 2024-10-19 | 2024-10-19 | Standard | Tshwane (GTP) | 5 | 5 | 1 | Yes | Analysis |
| 16 | 2024 Gauteng North Open Chess Tournament (U12) | 2024-10-05 | 2024-10-06 | Standard | Tshwane (GTP) | 5 | 4 | 2 | Yes | Analysis |
| 17 | Gauteng Schools Individuals Finals 2024 (U11 Boys) | 2024-08-16 | 2024-08-16 | Standard | Ekurhuleni (GE) | 5 | 5 | 3 | Yes | Analysis |
| 18 | D4 Tshwane South District Schools Teams Chess Tournament 2024 (U11A) | 2024-08-03 | 2024-08-03 | Standard | Tshwane (GTP) | 5 | 5 | 0 | Yes | Analysis |
| 19 | 2024 Tshwane South School District CLOSED Individual Championships (U11 Mixed) | 2024-05-11 | 2024-05-11 | Standard | Tshwane (GTP) | 5 | 5 | 4 | Yes | Analysis |
| 20 | 2024 Constantiapark Open (D2) | 2024-02-17 | 2024-02-17 | Standard | Tshwane (GTP) | 5 | 5 | 3 | Yes | Analysis |
| 21 | 2023 Tshwane South School District CLOSED League Championship (U11) | 2023-07-29 | 2023-07-29 | Standard | Tshwane (GTP) | 5 | 5 | 2 | Yes | Analysis |
| 22 | 2023 Tshwane South School District CLOSED Individual Championships (U11 Open) | 2023-04-22 | 2023-04-22 | Standard | Tshwane (GTP) | 5 | 5 | 2 | Yes | Analysis |
| 23 | D4 Play Offs 2022 (U9) | 2022-07-30 | 2022-07-30 | Standard | Tshwane (GTP) | 5 | 5 | 1.5 | Yes | Analysis |
| 24 | CP Ope 2022 (D2) | 2022-02-19 | 2022-02-19 | Standard | Tshwane (GTP) | 5 | 5 | 2.5 | Yes | Analysis |
| 25 | 2021 Chris Greyling Open Tournament (E) | 2021-05-08 | 2021-05-08 | Standard | Tshwane (GTP) | 5 | 5 | 3 | Yes | Analysis |
| 26 | 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 | Kekana ,K (Karabo) | 2 | 2 | 425 | 2 | 2 | 425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1237.7 | 1662.7 | 1244.4 | 1662.7 | 0 | 0 | 0 | 0 | ||||||
| 3 | Ndebele ,AT (Akhumzi Thandolwenkosi) | 2 | 0 | -425 | 2 | 0 | -425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1221.6 | 796.6 | 1216.1 | 796.6 | 0 | 0 | 0 | 0 | ||||||
| 4 | Grobbelaar ,M (Mienje) | 2 | 0.5 | -212.5 | 2 | 0.5 | -212.5 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1384.2 | 1171.8 | 1383.2 | 1171.8 | 0 | 0 | 0 | 0 | ||||||
| 5 | 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 | ||||||
| 6 | 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 | ||||||
| 7 | 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 | ||||||
| 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 | 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 | ||||||
| 10 | Ribbens ,R (Reuben) | 2 | 0 | -425 | 2 | 0 | -425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1565.9 | 1140.9 | 1561.5 | 1140.9 | 0 | 0 | 0 | 0 | ||||||
Norms
| # | Norm | Tournament | Start | End | Rounds | Games | Score | Details |
|---|---|---|---|---|---|---|---|---|