PLAYER PAGE

Donovan Denzel Izak Grobler

109095323
Tshwane (GTP)
Personal
Main rating
Rating 1413.7
K-factor 36
Floor 883.4
Highest 1413.7 (2026-02-28)
Min/Max +/- allowed 122
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 1423.9
Final +/- 0
New Rating
()
Rating 1413.7
K-factor 36
Floor 883.4
Highest 1413.7 (2026-02-28)
Min/Max +/- allowed 122.3
Standard rating
Rating 1414.9
K-factor 36
Floor 896.9
Highest 1414.9 (2026-02-28)
Min/Max +/- allowed 122.1
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 1423.9
Final +/- 0
New Rating
()
Rating 1414.9
K-factor 36
Floor 896.9
Highest 1414.9 (2026-02-28)
Min/Max +/- allowed 122.1
Rapid rating
Rating 1200
K-factor 36
Floor 700
Highest 1200 (2018-10-01)
Min/Max +/- allowed 165.8
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 0
Final +/- 0
New Rating
()
Rating 1200
K-factor 36
Floor 700
Highest 1200 (2018-10-01)
Min/Max +/- allowed 165.8
Blitz rating
Rating 1047.2
K-factor 36
Floor 700
Highest 1200 (2018-10-01)
Min/Max +/- allowed 165.8
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 0
Final +/- 0
New Rating
()
Rating 1047.2
K-factor 36
Floor 700
Highest 1200 (2018-10-01)
Min/Max +/- allowed 165.8
Rating Graph
Tournaments
No tournaments found.
# Tournament Type Start End Host Rounds Rating Games Score Perform Rat+/- Details
# Tournament Type Start End Host Rounds Rating Games Score Perform Rat+/- Details
1 Grey College Team Championship 2026 (Prestige) Standard 2026-02-20 2026-02-21 Mangaung (FMB) 5 1362.6 5 2 1473.6 0 Details
2 2025 Gauteng Top Schools Teams (U17) Standard 2025-08-30 2025-08-30 Tshwane (GTP) 5 1334.4 5 1.5 1132.9 0 Details
3 Paarl Boys' High School Chess Festival 2025 (B) Standard 2025-10-17 2025-10-18 Cape Winelands (WCW) 6 1334.4 6 4.5 1618.2 0 Details
4 2025 Tshwane South School District CLOSED League Championship (U17A) Standard 2025-08-16 2025-08-16 Tshwane (GTP) 5 1270.9 4 4 1704.7 0 Details
5 Grey College Team Championship 2025 (A) Standard 2025-02-21 2025-02-22 Mangaung (FMB) 5 1219.7 5 4 1501 0 Details
6 Grey College Team Championship 2024 (A) Standard 2024-02-23 2024-02-24 Mangaung (FMB) 5 1229.3 5 2 1166.9 0 Details
7 Lardies Open Tournament 2023 (C) Standard 2023-10-28 2023-10-28 Tshwane (GTP) 5 1188.3 5 3 1424.4 0 Details
8 2023 Gauteng Top Schools (U15 Mixed) Standard 2023-08-19 2023-08-19 West Rand (GWR) 5 1156.6 5 3 1345.7 0 Details
9 2023 Tshwane South School District CLOSED League Championship (U15) Standard 2023-07-29 2023-07-29 Tshwane (GTP) 3 1166.8 3 1 1082.8 0 Details
10 2023 Tshwane South School District CLOSED Individual Championships (U15 Open) Standard 2023-04-22 2023-04-22 Tshwane (GTP) 5 1202.1 5 1 1006.2 0 Details
11 2023 Tshwane Chess Open Registration Tournament (B1) Standard 2023-01-28 2023-01-28 Tshwane (GTP) 5 1204.5 4 1 1188.8 0 Details
12 Lardies Tournament 2022 (U14) Standard 2022-10-29 2022-10-29 Tshwane (GTP) 5 1189.3 5 3 1270 0 Details
13 D4 Play Offs 2022 (U13) Standard 2022-07-30 2022-07-30 Tshwane (GTP) 5 1192.6 5 2 1184.5 0 Details
14 2022 Blou Bul Open (C) Standard 2022-06-25 2022-06-26 Tshwane (GTP) 5 1224.7 5 2 1057 0 Details
15 2022 Silver Lakes Chess Club Open Chess Tournament (C) Standard 2022-05-14 2022-05-14 Tshwane (GTP) 5 1250.1 5 2 1111.7 0 Details
16 2022 Gauteng Interregion (U14 Open) Standard 2022-02-26 2022-02-26 Tshwane (GTP) 5 1255.5 5 2 1217.9 0 Details
17 2022 Tshwane Chess Open Registration Tournament (C1) Standard 2022-01-29 2022-01-29 Tshwane (GTP) 5 1264.2 5 2 1210.2 0 Details
18 2021 Lardies Ope (C) Standard 2021-10-30 2021-10-30 Tshwane (GTP) 5 1243.6 5 3 1354.1 0 Details
19 2021 Etienne Lewis Closed Trials (U14 Open) Standard 2021-09-24 2021-09-26 Nelson Mandela Bay (ENM) 7 1276.4 7 3 1163.4 0 Details
20 2021 Chris Greyling Open Tournament (C) Standard 2021-05-08 2021-05-08 Tshwane (GTP) 5 1285.2 5 3 1246.3 0 Details
21 2021 Lubowski Open Tournament (C) Standard 2021-05-01 2021-05-02 Tshwane (GTP) 5 1285.2 5 3 1271.7 0 Details
22 2021 Registration Tournament (C) Standard 2021-03-13 2021-03-13 Tshwane (GTP) 5 1267 5 3 1378.9 0 Details
23 2020 Wynie Robbertse Open Chess Tournament (C) Standard 2020-03-07 2020-03-07 Tshwane (GTP) 5 1183.8 5 3 1334.4 0 Details
24 2020 Waterkloof Open (C) Standard 2020-02-29 2020-03-01 Tshwane (GTP) 5 1183.8 5 3 1411 0 Details
25 2020 Constantiapark Open Chess Tournament (C) Standard 2020-02-08 2020-02-08 Tshwane (GTP) 5 1222 5 1 1025 0 Details
26 2020 Blou Bul (C) Standard 2020-02-15 2020-02-15 Tshwane (GTP) 5 1222 5 2 1205.7 0 Details
27 2020 Registration Tournament (D) Standard 2020-01-25 2020-01-25 Tshwane (GTP) 5 1160.9 5 4 1262.8 0 Details
28 2019 South African Juior Blitz Championship (B) Blitz 2020-01-05 2020-01-05 4 Knights (4K) 7 1160.9 4 0.5 935.9 0 Details
29 2019 South African Junior Team Championships (U12E) Classical 2020-01-04 2020-01-08 4 Knights (4K) 7 1160.9 7 5.5 1300.5 0 Details
30 2019 TC SAJCC Prep Tournament (B) Standard 2019-11-30 2019-11-30 Tshwane (GTP) 5 1170.5 5 2 1114.4 0 Details
31 2019 Lardies Open (D) Standard 2019-10-26 2019-10-26 Tshwane (GTP) 5 1125.5 5 4 1337.4 0 Details
32 Waterkloof end of Year Blitz 2019 Blitz 2019-10-17 2019-10-17 Chess Excellence (CEX) 6 1125.5 6 2.5 1258.2 0 Details
33 2019 Etienne Lewis Trials (U12 Boys) Classical 2019-08-30 2019-09-01 Tshwane (GTP) 7 1131.5 7 3 1118.9 0 Details
34 2019 Capablanca Chess Festival (Swiss D) Standard 2019-04-19 2019-04-21 Tshwane (GTP) 7 1112.3 7 4 1170.7 0 Details
35 2019 Constantia Park Open (D) Standard 2019-02-09 2019-02-09 Tshwane (GTP) 5 1095.7 5 3 1175.2 0 Details
36 2019 Tshwane Chess Registration Tournament (D) Standard 2019-01-26 2019-01-26 Tshwane (GTP) 5 1139.2 5 1.5 923.4 0 Details
37 2018 Lardies Ope (D) Standard 2018-10-27 2018-10-27 Tshwane (GTP) 5 1200 5 2 892.1 0 Details
38 2017 Lardies Open (F) Standard 2017-10-28 2017-10-28 Tshwane (GTP) 5 0 5 3 698 0 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 5
Wins 1
Draws 2
Losses 2
White 2
Black 3
White wins 1
Black wins 0
Score 2
Percent 40
Dp -85
AOR 1558.6
Performance 1473.6
Game statistics (History)
Games 190
Wins 89
Draws 14
Losses 87
White 93
Black 97
White wins 43
Black wins 46
Score 96
Percent 50.5
Dp 4.5
AOR 1228.5
Performance 1233
Rankings (Main)
National
Overall 3028
Gender 2583
Age group 435
Gender/Age 362
Provincial
Overall 1057
Gender 891
Age group 169
Gender/Age 142
Regional
Overall 385
Gender 314
Age group 67
Gender/Age 54
Rankings (Standard)
National
Overall 2712
Gender 2303
Age group 393
Gender/Age 322
Provincial
Overall 990
Gender 837
Age group 160
Gender/Age 133
Regional
Overall 373
Gender 308
Age group 67
Gender/Age 54
Rankings (Rapid)
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
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 5
Score 2
Percent 40
Aor 1558.6
Dp -85
Prat 1473.6
Performance (12 months)
Games 20
Score 12
Percent 60
Aor 1393
Dp 85
Prat 1478
Performance (History)
Games 190
Score 96
Percent 50.5
Aor 1228.5
Dp 4.5
Prat 1233
Top 5 opponents most often played
Type # Opponent Games White Black First tournament Last tournament Details
Overall 1 Van Deventer, NS (Nathaniel Steven) 4 2 2 2019 Tshwane Chess Registration Tournament (D) D4 Play Offs 2022 (U13) Details
Overall 2 Mokoena, GP (Gonase Promise) 3 2 1 2019 TC SAJCC Prep Tournament (B) 2020 Waterkloof Open (C) Details
Overall 3 Bhudai, A (Arman) 3 2 1 2019 TC SAJCC Prep Tournament (B) 2023 Tshwane South School District CLOSED League Championship (U15) Details
Overall 4 Webb, K (Kagan) 3 0 3 2019 Etienne Lewis Trials (U12 Boys) 2022 Tshwane Chess Open Registration Tournament (C1) Details
Overall 5 O Rourke, R (Ronan) 3 1 2 2020 Constantiapark Open Chess Tournament (C) Lardies Tournament 2022 (U14) Details
Standard 1 Van Deventer, NS (Nathaniel Steven) 4 2 2 2019 Tshwane Chess Registration Tournament (D) D4 Play Offs 2022 (U13) Details
Standard 2 O Rourke, R (Ronan) 3 1 2 2020 Constantiapark Open Chess Tournament (C) Lardies Tournament 2022 (U14) Details
Standard 3 Bhudai, A (Arman) 3 2 1 2019 TC SAJCC Prep Tournament (B) 2023 Tshwane South School District CLOSED League Championship (U15) Details
Standard 4 Yang, A (Alex) 3 2 1 2022 Gauteng Interregion (U14 Open) 2023 Tshwane South School District CLOSED Individual Championships (U15 Open) Details
Standard 5 Webb, K (Kagan) 3 0 3 2019 Etienne Lewis Trials (U12 Boys) 2022 Tshwane Chess Open Registration Tournament (C1) Details