Chess South Africa Ratings Database

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Personal

Grobler, R (Rowan)

Chess SA id

1110140037

FIDE id

Date of birth

2011-08-16 (U16)

Gender

Male

Region

Bojanala Platina (NBR)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-05-25

Personal details last changed

1900-01-01

Junior GPX Games

25.9

Junior GPX Points

1549.3

Item	Main	Standard	Rapid	Blitz
Rating	1601.6	1610.2	1256.4	1200
Raw rating	1601.6	1610.2	1256.4	1200
Weighted rating	1527.8	1522.6	1235.3	1200
Weighted performance	1458.9	1517.2	0	0
Floor	1134.1	1128.3	756.4	700
K-factor	28	28	36	36
Min/Max rating change allowed	93.6	92.4	153	165.8
Highest rating	1637.2 2022-04-01	1637.2 2022-04-01	1352.5 2024-07-01	1200 2018-10-01
Highest raw rating	1634.1 2025-04-01	1628.3 2025-04-01	1256.4 2025-06-01	1200 2024-02-01
Highest weighted rating	1504.7 2025-08-01	1628.3 2024-10-01	1256.4 2018-10-01	1200 2018-10-01
Highest weighted performance	1637.2 2022-04-01	1637.2 2022-04-01	1352.5 2024-07-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1601.6	1610.2	1256.4	1200
Analysis
Rating	1601.6	1610.2	1256.4	1200
Raw rating	1601.6	1610.2	1256.4	1200
Weighted rating	1527.8	1522.6	1235.3
Weighted performance	1458.9	1517.2	0
K-factor	28	28	36	36
Floor	1134.1	1128.3	756.4	700
Max/Min rating change allowed	93.6	92.4	153	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	1601.6	1610.2	1256.4	1200
New weighted rating	1538	1533.8	1238.9	1200
New weighted performance	1458.4	1516.7	0	0
Temp new rating	1601.6	1610.2	1256.4	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1601.6	1610.2	1256.4	1200
New K-factor	28	28	36	36
New floor	1134.1	1128.3	756.4	700

Item	Main	Standard	Rapid
	0	0	0
	28	23	5
	53	48	5
	41	36	5
	56	56	0
	0	0	0
History	178	163	15

Games since
	Main 91	Standard 81		Rapid 10		Blitz 0
Gender	Male
Age group	U16
Region	Bojanala Platina (NBR)
Province	Northwest (NW)
Main
	RSA		Province		Region
Overall	642		59		50
Male	583		53		45
U16	72		8		7
U16 Male	62		8		7
Standard
	RSA		Province		Region
Overall	573		58		48
Male	527		52		43
U16	66		8		7
U16 Male	59		8		7
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 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	28	19	67.86	151.8	1466	1617.8
Standard	23	16	69.57	166.3	1481	1647.3
Rapid	5	3	60	85	1397.4	1482.4
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	178	113	63.48	114.6	1335.6	1450.2
Standard	163	104	63.8	117.3	1333.3	1450.7
Rapid	15	9	60	85	1359.7	1444.7
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1601.6	1610.2	1256.4	1200
2025-09-01	1601.6	1610.2	1256.4	1200
2025-08-01	1601.6	1610.2	1256.4	1200
2025-07-01	1601.6	1610.2	1256.4	1200
2025-06-01	1601.6	1610.2	1256.4	1200
2025-05-01	1634.1	1628.3	1247.2	1200
2025-04-01	1634.1	1628.3	1247.2	1200
2025-03-01	1513.4	1499.2	1247.2	1200
2025-02-01	1440.8	1413	1247.2	1200
2025-01-01	1440.8	1413	1247.2	1200
2024-12-01	1440.8	1413	1247.2	1200
2024-11-01	1440.8	1413	1247.2	1200
2024-10-01	1440.8	1413	1247.2	1200
2024-09-01	1526.6	1515.4	1247.2	1200
2024-08-01	1555.1	1547.1	1247.2	1200
2024-07-01	1471.3	1469.9	1145.2	1200
2024-06-01	1410	1407.2	1145.2	1200
2024-08-01	1412.7	1411	1145.2	1200
2024-04-01	1387.5	1392.3	1145.2	1200
2024-03-01	1387.5	1392.3	1145.2	1200
2024-02-01	1339.3	1353.4	1145.2	1200
2024-01-01	1283.3	1286.5	1145.2	1200
2023-12-01	1283.3	1286.5	1145.2	1200
2023-11-01	1327.9	1344.1	1145.2	1200

Comming soon.

Tournaments

History

No tournaments found.

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Spartan Bishops Championships Elite 2025 (U16)	2025-05-23	2025-05-25	Standard	Frances Baard (NCF)	5	4	2.5	Yes	Analysis
2	Robday Bergsig Sport Festival 2025 (Juniors)	2025-05-03	2025-05-03	Rapid	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
3	Bojanala's Waterkloof - The Superior One 2025 (Rooks)	2025-03-15	2025-03-15	Standard	Bojanala Platina (NBR)	5	5	4	Yes	Analysis
4	Bojanala Circuit Championships 1 of 4 2025 (U16)	2025-03-01	2025-03-01	Standard	Bojanala Platina (NBR)	5	4	3	Yes	Analysis
5	Bojanala's Battle In The Kloof 2025 (Rooks)	2025-02-15	2025-02-15	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
6	Bojanala Closed Chess Championships 2025 (U14)	2025-01-31	2025-02-02	Standard	Bojanala Platina (NBR)	5	5	3.5	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Spartan Bishops Championships Elite 2025 (U16)	2025-05-23	2025-05-25	Standard	Frances Baard (NCF)	5	4	2.5	Yes	Analysis
2	Robday Bergsig Sport Festival 2025 (Juniors)	2025-05-03	2025-05-03	Rapid	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
3	Bojanala's Waterkloof - The Superior One 2025 (Rooks)	2025-03-15	2025-03-15	Standard	Bojanala Platina (NBR)	5	5	4	Yes	Analysis
4	Bojanala Circuit Championships 1 of 4 2025 (U16)	2025-03-01	2025-03-01	Standard	Bojanala Platina (NBR)	5	4	3	Yes	Analysis
5	Bojanala's Battle In The Kloof 2025 (Rooks)	2025-02-15	2025-02-15	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
6	Bojanala Closed Chess Championships 2025 (U14)	2025-01-31	2025-02-02	Standard	Bojanala Platina (NBR)	5	5	3.5	Yes	Analysis
7	Bojanala's Battle In The Kloof 2024 (Queens)	2024-09-21	2024-09-21	Standard	Bojanala Platina (NBR)	5	5	0	Yes	Analysis
8	Bojanala Circuit Championships 3 of 4 2024 (U16)	2024-09-14	2024-09-14	Standard	Bojanala Platina (NBR)	5	4	1	Yes	Analysis
9	Bojanala's FIDE In The Sparkling Waters 2024 (Rooks)	2024-08-16	2024-08-18	Standard	Bojanala Platina (NBR)	6	5	3	Yes	Analysis
10	Bojanala's Clash Of Schools - Secondary 2024 (U17)	2024-07-27	2024-07-27	Rapid	Bojanala Platina (NBR)	5	5	5	Yes	Analysis
11	Bojanala's Clash Of Schools 2024 (Championship)	2024-07-20	2024-07-20	Standard	Bojanala Platina (NBR)	5	5	4	Yes	Analysis
12	Bojanala Circuit Championship 2 of 4 2024 (U14)	2024-06-15	2024-06-15	Standard	Bojanala Platina (NBR)	5	5	4.5	Yes	Analysis
13	Bojanala Circuit Championship 1 of 4 2024 (U14)	2024-05-25	2024-05-25	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
14	Bojanala Olienpark's One For The Ages 2024 (Bishops)	2024-04-20	2024-04-20	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
15	Bojanala's Rating Express 2024 (Bishops)	2024-04-06	2024-04-06	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
16	Bojanala Closed Chess Championships Finals 2024 (U14)	2024-02-09	2024-02-11	Standard	Bojanala Platina (NBR)	5	5	2.5	Yes	Analysis
17	Bojanala Closed Chess Championships Stage 1 2024 (U14)	2024-01-27	2024-01-27	Standard	Bojanala Platina (NBR)	5	4	3.5	Yes	Analysis
18	2023 Cross Border Chess Championships Gaborone vs Bojanala	2023-12-14	2023-12-16	Standard	Botswana (BOT)	5	5	3	Yes	Analysis
19	Bojanala's Merry ChessMas 2023 (Rooks)	2023-12-09	2023-12-09	Standard	Bojanala Platina (NBR)	5	5	1	Yes	Analysis
20	Bojanala's Rosewood 2023 (Rooks)	2023-08-12	2023-08-12	Standard	Bojanala Platina (NBR)	5	5	2	Yes	Analysis
21	Bojanala School League 2023 (Primary School Open)	2023-08-19	2023-08-19	Rapid	Bojanala Platina (NBR)	5	5	1	Yes	Analysis
22	Bojanala's FIDE in the Sparkling Waters 2023 (Rooks)	2023-07-28	2023-07-30	Standard	Bojanala Platina (NBR)	6	6	2.5	Yes	Analysis
23	Grenswag's Community Battle 2023 (Rooks)	2023-04-22	2023-04-22	Standard	Bojanala Platina (NBR)	5	5	4	Yes	Analysis
24	Schoemies Kings & Queens 2023 (Rooks)	2023-03-18	2023-03-18	Standard	Bojanala Platina (NBR)	5	5	2	Yes	Analysis
25	One For The Ages 2023 (U14)	2023-02-18	2023-02-18	Standard	Bojanala Platina (NBR)	5	5	4	Yes	Analysis
26	2022 South African Junior Team Chess Championships (U12 Open)	2022-12-04	2022-12-08	Standard	4 Knights (4K)	7	7	5	Yes	Analysis
27	West Rand vs Bojanala 2022 (U12A)	2022-11-05	2022-11-05	Standard	Bojanala Platina (NBR)	6	6	3	Yes	Analysis
28	FIDE at The King`s Gate 2.0 2022 (C)	2022-10-22	2022-10-22	Standard	Bojanala Platina (NBR)	5	5	2	Yes	Analysis
29	Larries The Final Wild Card Tournament 2022 (U12)	2022-09-17	2022-09-17	Standard	Bojanala Platina (NBR)	5	4	4	Yes	Analysis
30	Bojanala SAJCC Trials 2022 (U12)	2022-09-23	2022-09-23	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
31	Bojanala Chess Federation Wildcards 2022 (U12)	2022-08-20	2022-08-20	Standard	Bojanala Platina (NBR)	5	5	4	Yes	Analysis
32	Bojanala Chess Federation Clash of Schools 2022 (PS Championship)	2022-07-22	2022-07-22	Standard	Bojanala Platina (NBR)	5	5	5	Yes	Analysis
33	2nd One For The Ages 2022 (U12)	2022-07-30	2022-07-30	Standard	Bojanala Platina (NBR)	5	4	3	Yes	Analysis
34	One For The Ages 2022 (U12)	2022-07-16	2022-07-16	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
35	Bojanala Fields Rapid-Blitz-Blindfold Champions 2022 (Development)	2022-05-28	2022-05-28	Standard	Bojanala Platina (NBR)	5	5	5	Yes	Analysis
36	RHS Know Thyself 2022 (Development)	2022-04-23	2022-04-23	Standard	Bojanala Platina (NBR)	5	5	5	Yes	Analysis

#	Games	Start				End
1	13	Tournament RHS Know Thyself 2022				Tournament One For The Ages 2022
		date 2022-04-23	rnd 1	type Standard	result 1	date 2022-07-16	rnd 3	type Standard	result 1
		Opponent Nkosi, O (Onthatile)				Opponent Van Staden, N (Nathan)
2	8	Tournament Bojanala's Clash Of Schools 2024				Tournament Bojanala's FIDE In The Sparkling Waters 2024
		date 2024-07-20	rnd 5	type Standard	result 1	date 2024-08-17	rnd 3	type Standard	result 1
		Opponent Molokwane, G (Gaona)				Opponent Ramaboa, T (Thando)
3	8	Tournament Bojanala Circuit Championship 2 of 4 2024				Tournament Bojanala's Clash Of Schools 2024
		date 2024-06-15	rnd 1	type Standard	result 1	date 2024-07-20	rnd 3	type Standard	result 1
		Opponent De Jager, L (Luan)				Opponent Nkabinde, N (Nkazimulo)

#	Games	Start				End
1	13	Tournament RHS Know Thyself 2022				Tournament One For The Ages 2022
		date 2022-04-23	rnd 1	type Standard	result 1	date 2022-07-16	rnd 3	type Standard	result 1
		Opponent Nkosi, O (Onthatile)				Opponent Van Staden, N (Nathan)
2	8	Tournament Bojanala Circuit Championship 2 of 4 2024				Tournament Bojanala's Clash Of Schools 2024
		date 2024-06-15	rnd 1	type Standard	result 1	date 2024-07-20	rnd 3	type Standard	result 1
		Opponent De Jager, L (Luan)				Opponent Nkabinde, N (Nkazimulo)
3	8	Tournament 2023 Cross Border Chess Championships Gaborone vs Bojanala				Tournament Bojanala Closed Chess Championships Finals 2024
		date 2023-12-16	rnd 5	type Standard	result 1	date 2024-02-10	rnd 3	type Standard	result 1
		Opponent Kaemana, Atlang				Opponent Roos, J (Justin)

#	Games	Start				End
1	6	Tournament Bojanala's Clash Of Schools - Secondary 2024				Tournament Robday Bergsig Sport Festival 2025
		date 2024-07-27	rnd 1	type Rapid	result 1	date 2025-05-03	rnd 1	type Rapid	result 1
		Opponent Phadi, T (Teboho)				Opponent Potgieter, R (Reinhardt)
2	2	Tournament Robday Bergsig Sport Festival 2025				Tournament Robday Bergsig Sport Festival 2025
		date 2025-05-03	rnd 4	type Rapid	result 1	date 2025-05-03	rnd 5	type Rapid	result 1
		Opponent Vermaak, J (Joshua)				Opponent Ramasika, T (Tshegofatso)
3	1	Tournament Bojanala School League 2023				Tournament Bojanala School League 2023
		date 2023-08-19	rnd 1	type Rapid	result 1	date 2023-08-19	rnd 1	type Rapid	result 1
		Opponent Terblanche, J (Johann)				Opponent Terblanche, J (Johann)

No games found.

#	Games	Start				End

#	Games	Start				End
1	13	Tournament RHS Know Thyself 2022				Tournament One For The Ages 2022
		date 2022-04-23	rnd 1	type Standard	result 1	date 2022-07-16	rnd 3	type Standard	result 1
		Opponent Nkosi, O (Onthatile)				Opponent Van Staden, N (Nathan)
2	8	Tournament Bojanala's Clash Of Schools 2024				Tournament Bojanala's FIDE In The Sparkling Waters 2024
		date 2024-07-20	rnd 5	type Standard	result 1	date 2024-08-17	rnd 3	type Standard	result 1
		Opponent Molokwane, G (Gaona)				Opponent Ramaboa, T (Thando)
3	7	Tournament Bojanala Chess Federation Clash of Schools 2022				Tournament 2nd One For The Ages 2022
		date 2022-07-22	rnd 1	type Standard	result 1	date 2022-07-30	rnd 3	type Standard	result 1
		Opponent Hannemann, D (Daniel)				Opponent Gouws, K (Karah)

#	Games	Start				End
1	13	Tournament RHS Know Thyself 2022				Tournament One For The Ages 2022
		date 2022-04-23	rnd 1	type Standard	result 1	date 2022-07-16	rnd 3	type Standard	result 1
		Opponent Nkosi, O (Onthatile)				Opponent Van Staden, N (Nathan)
2	7	Tournament Bojanala Chess Federation Clash of Schools 2022				Tournament 2nd One For The Ages 2022
		date 2022-07-22	rnd 1	type Standard	result 1	date 2022-07-30	rnd 3	type Standard	result 1
		Opponent Hannemann, D (Daniel)				Opponent Gouws, K (Karah)
3	6	Tournament Larries The Final Wild Card Tournament 2022				Tournament Bojanala SAJCC Trials 2022
		date 2022-09-17	rnd 2	type Standard	result 1	date 2022-09-23	rnd 2	type Standard	result 1
		Opponent Myburgh, B (Braydan)				Opponent Botha, J (Johannes Cornelis)

#	Games	Start				End
1	6	Tournament Bojanala's Clash Of Schools - Secondary 2024				Tournament Robday Bergsig Sport Festival 2025
		date 2024-07-27	rnd 1	type Rapid	result 1	date 2025-05-03	rnd 1	type Rapid	result 1
		Opponent Phadi, T (Teboho)				Opponent Potgieter, R (Reinhardt)
2	2	Tournament Robday Bergsig Sport Festival 2025				Tournament Robday Bergsig Sport Festival 2025
		date 2025-05-03	rnd 4	type Rapid	result 1	date 2025-05-03	rnd 5	type Rapid	result 1
		Opponent Vermaak, J (Joshua)				Opponent Ramasika, T (Tshegofatso)
3	1	Tournament Bojanala School League 2023				Tournament Bojanala School League 2023
		date 2023-08-19	rnd 1	type Rapid	result 1	date 2023-08-19	rnd 1	type Rapid	result 1
		Opponent Terblanche, J (Johann)				Opponent Terblanche, J (Johann)

No games found.

#	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
		Gms	Aor	Prat	Gms	Aor	Prat	Gms	Aor	Prat	Gms	Aor	Prat
1	Botha ,J (Johannes Cornelis)	9	4.5	0	8	4.5	53.1	1	0	-425	0	0	0
1	Botha ,J (Johannes Cornelis)	9	1424.9	1424.9	8	1421.8	1478	1	1200	999.9	0	0	0
2	Roos ,J (Justin)	9	3	-141.7	8	3	-106.2	1	0	-425	0	0	0
2	Roos ,J (Justin)	9	1494.2	1352.6	8	1499.7	1388	1	1200	1069.2	0	0	0
3	Terblanche ,J (Johann)	6	4	141.7	4	3	212.5	2	1	0	0	0	0
3	Terblanche ,J (Johann)	6	1447.1	1588.7	4	1441.7	1659.6	2	1292.2	1447.1	0	0	0
4	Potgieter ,R (Reinhardt)	5	4	255	4	3	212.5	1	1	425	0	0	0
4	Potgieter ,R (Reinhardt)	5	1196.4	1451.4	4	1172.3	1408.9	1	1156	1621.4	0	0	0
5	Changara ,A (Adiel Tavonga)	5	4	255	4	4	425	1	0	-425	0	0	0
5	Changara ,A (Adiel Tavonga)	5	1356.5	1611.5	4	1350.3	1781.5	1	1181.6	931.5	0	0	0
6	Changara ,A (Alvis Tafadzwa)	4	1.5	-106.2	4	1.5	-106.2	0	0	0	0	0	0
6	Changara ,A (Alvis Tafadzwa)	4	1460.2	1354	4	1454.9	1354	0	0	0	0	0	0
7	Watt ,C (Chad)	4	3	212.5	4	3	212.5	0	0	0	0	0	0
7	Watt ,C (Chad)	4	1340.6	1553.1	4	1323.7	1553.1	0	0	0	0	0	0
8	Tshetlhe ,B (Blessing)	4	2.5	106.2	4	2.5	106.2	0	0	0	0	0	0
8	Tshetlhe ,B (Blessing)	4	1417.1	1523.3	4	1415.4	1523.3	0	0	0	0	0	0
9	Dikolomela ,T (Tlhogi)	4	2.5	106.2	4	2.5	106.2	0	0	0	0	0	0
9	Dikolomela ,T (Tlhogi)	4	1315.3	1421.5	4	1311.6	1421.5	0	0	0	0	0	0
10	Nortman ,WJ (Wilhelmus Johan)	4	2	0	4	2	0	0	0	0	0	0	0
10	Nortman ,WJ (Wilhelmus Johan)	4	1295.9	1295.9	4	1279.6	1295.9	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Grobler, R (Rowan)

Ratings

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Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms