Chess South Africa Ratings Database

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Personal

Botha, R (Ralph)

Chess SA id

181084295

FIDE id

Date of birth

1981-12-07 (Adult)

Gender

Male

Region

Eden (WEG)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-08-29

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1673.1	1636.4	1203.6	1746.2
Raw rating	1669.7	1636.4	1203.6	1707
Weighted rating	1673.1	1635.7	1197.3	1746.2
Weighted performance	1321.9	1153	896.9	1464.6
Floor	1198.9	1148.4	703.6	1343.2
K-factor	28	28	36	24
Min/Max rating change allowed	84.9	89	165	80.5
Highest rating	1698.9 2024-01-01	1648.4 2024-01-01	1554.2 2018-07-01	1843.2 2024-02-01
Highest raw rating	1698.9 2024-01-01	1648.4 2024-01-01	1203.6 2024-05-01	1843.2 2024-02-01
Highest weighted rating	1673.1 2025-09-30	1633.8 2025-08-01	1203.6 2024-11-01	1746.2 2025-09-30
Highest weighted performance	1628.6 2023-03-01	1607.7 2023-03-01	1554.2 2018-07-01	1664.6 2024-09-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0.5	0	0	-2.4
New rating	1673.6	1636.4	1203.6	1743.8
Analysis
Rating	1673.1	1636.4	1203.6	1746.2
Raw rating	1669.7	1636.4	1203.6	1707
Weighted rating	1673.1	1635.7	1197.3
Weighted performance	1321.9	1153	896.9
K-factor	28	28	36	24
Floor	1198.9	1148.4	703.6	1343.2
Max/Min rating change allowed	84.9	89	165	80.5
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	1669.7	1636.4	1203.6	1707
New weighted rating	1673.6	1636.2	1199.1	1743.8
New weighted performance	1321.4	1152.4	896.5	1464.1
Temp new rating	1673.6	1636.4	1203.6	1743.8
Temp new rating +/-	0.5	0	0	-2.4
Final new rating +/-	0.5	0	0	-2.4
New rating	1673.6	1636.4	1203.6	1743.8
New K-factor	28	28	36	24
New floor	1198.9	1148.4	703.6	1343.2

Item	Main	Standard	Rapid	Blitz
	0	0	0	0
	7	0	0	7
	53	6	7	40
	50	10	12	28
	52	11	11	30
	11	11	0	0
History	270	86	46	138

Games since
	Main 60	Standard 6		Rapid 7		Blitz 47
Gender	Male
Age group	Adult
Region	Eden (WEG)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	357		107		16
Male	335		98		15
Adult	196		59		7
Adult Male	186		54		7
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	64		31		5
Male	63		31		5
Adult	56		26		4
Adult Male	55		26		4


	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	7	4	57.14	60.7	1490	1550.7
Standard	0	0	0	0	0	0
Rapid	0	0	0	0	0	0
Blitz	7	4	57.14	60.7	1490	1550.7
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	245	154.5	63.06	111	1470	1581.1
Standard	66	38.5	58.33	70.8	1473	1543.8
Rapid	41	24	58.54	72.6	1420	1492.6
Blitz	138	92	66.67	141.7	1483.5	1625.2

Date	Main	Standard	Rapid	Blitz
2025-09-30	1669.7	1636.4	1203.6	1707
2025-09-01	1674.9	1636.4	1203.6	1750
2025-08-01	1674.9	1636.4	1203.6	1750
2025-07-01	1674.9	1636.4	1203.6	1750
2025-06-01	1674.9	1636.4	1203.6	1750
2025-05-01	1674.9	1636.4	1203.6	1750
2025-04-01	1674.9	1636.4	1203.6	1750
2025-03-01	1674.9	1636.4	1203.6	1750
2025-02-01	1674.9	1636.4	1203.6	1750
2025-01-01	1674.9	1636.4	1203.6	1750
2024-12-01	1674.9	1636.4	1203.6	1750
2024-11-01	1674.9	1636.4	1203.6	1750
2024-10-01	1674.9	1636.4	1203.6	1750
2024-09-01	1670.8	1636.4	1203.6	1728.6
2024-08-01	1670.8	1636.4	1203.6	1728.6
2024-07-01	1671.5	1636.4	1203.6	1729.1
2024-06-01	1671.5	1636.4	1203.6	1729.1
2024-08-01	1672.4	1636.4	1203.6	1778.8
2024-04-01	1681	1636.4	1114	1802.8
2024-03-01	1681	1636.4	1114	1802.8
2024-02-01	1684.9	1636.4	1114	1843.2
2024-01-01	1698.9	1648.4	1114	1843.2
2023-12-01	1525.7	1549.5	1114	1505.2
2023-11-01	1525.7	1549.5	1114	1505.2

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	Pacaltsdorp Open 2025 (Open)	2025-08-29	2025-08-29	Blitz	Eden (WEG)	7	7	4	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Pacaltsdorp Open 2025 (Open)	2025-08-29	2025-08-29	Blitz	Eden (WEG)	7	7	4	Yes	Analysis
2	Eden Gambit Chess Tournament 2024 (Blitz)	2024-11-01	2024-11-01	Blitz	Eden (WEG)	7	0	0	No	Analysis
3	InterClub Blitz 4 2024	2024-09-04	2024-09-04	Blitz	Eden (WEG)	10	8	6	Yes	Analysis
4	InterClub Blitz 3 Open 2024	2024-07-18	2024-07-18	Blitz	Eden (WEG)	10	8	5	Yes	Analysis
5	InterClub Blitz 2 2024	2024-05-16	2024-05-16	Blitz	Eden (WEG)	10	8	5	Yes	Analysis
6	InterClub Blitz 1 2024	2024-04-17	2024-04-17	Blitz	Eden (WEG)	10	8	4.5	Yes	Analysis
7	Waboomskraal Chess Club Open 2024	2024-04-06	2024-04-06	Rapid	Eden (WEG)	7	7	4	Yes	Analysis
8	Southern Knights Blitz 2024 (Open)	2024-02-23	2024-02-23	Blitz	Eden (WEG)	9	8	4	Yes	Analysis
9	Eden Closed 2024 (Men)	2024-01-20	2024-01-21	Standard	Eden (WEG)	6	6	3.5	Yes	Analysis
10	Mossel Bay Open 2023 (A)	2023-09-30	2023-10-01	Standard	Eden (WEG)	6	6	2	Yes	Analysis
11	Mossel Bay Open 2023 (Blitz)	2023-09-29	2023-09-29	Blitz	Eden (WEG)	6	6	4	Yes	Analysis
12	Pacaltsdorp Chess Club Open 2023 (A)	2023-08-26	2023-08-26	Rapid	Eden (WEG)	6	6	2	Yes	Analysis
13	Pacaltsdorp Chess Club Open 2023 (Blitz)	2023-08-25	2023-08-25	Blitz	Eden (WEG)	6	6	5	Yes	Analysis
14	Knysna Oyster Festival 2023 (Open)	2023-07-01	2023-07-01	Rapid	Eden (WEG)	6	6	2	Yes	Analysis
15	Inter Club Blitz 2 2023 (Open)	2023-06-21	2023-06-21	Blitz	Eden (WEG)	10	8	4	Yes	Analysis
16	Inter Club Blitz 1 2023	2023-05-24	2023-05-24	Blitz	Eden (WEG)	10	8	4	Yes	Analysis
17	Western Cape Inter Regional 2023 (Senior Men)	2023-03-18	2023-03-19	Standard	Eden (WEG)	5	4	3	Yes	Analysis
18	George Open 2022 (A)	2022-12-03	2022-12-03	Standard	Eden (WEG)	5	5	4	Yes	Analysis
19	Interclub Blitz Evening (Mossel Bay)	2022-10-26	2022-10-26	Blitz	Eden (WEG)	6	6	5	Yes	Analysis
20	Pacaltsdorp Chess Club 2022 (A)	2022-08-27	2022-08-27	Rapid	Eden (WEG)	6	6	4	Yes	Analysis
21	Pacaltsdorp Chess Club 2022 (Blitz)	2022-08-26	2022-08-26	Blitz	Eden (WEG)	6	6	5	Yes	Analysis
22	Interclub Blitz Evening 2022	2022-08-11	2022-08-11	Blitz	Eden (WEG)	6	6	4	Yes	Analysis
23	Knysna Oyster Festival Rapid Chess 2022 (A)	2022-07-02	2022-07-02	Rapid	Eden (WEG)	5	5	2.5	Yes	Analysis
24	Interclub Blitz Evening 2022	2022-06-08	2022-06-08	Blitz	Eden (WEG)	6	6	5	Yes	Analysis
25	Interclub Blitz Evening 2022	2022-05-11	2022-05-11	Blitz	Eden (WEG)	6	6	5	Yes	Analysis
26	Eden Open 2022 (A)	2022-04-22	2022-04-24	Standard	Eden (WEG)	6	6	4.5	Yes	Analysis
27	Western Cape Club Championships 2021 (A)	2021-10-15	2021-10-17	Standard	Eden (WEG)	6	6	3	Yes	Analysis
28	Eden Chess League 2021 (Premier)	2021-08-14	2021-08-15	Standard	Eden (WEG)	5	5	2	Yes	Analysis
29	Quadrangular Chess Tournament First Leg 2020	2020-02-12	2020-02-12	Blitz	Eden (WEG)	6	6	3	Yes	Analysis
30	Triangular 3 GEO-MOSS-PAC 2019	2019-10-03	2019-10-03	Blitz	Eden (WEG)	8	8	3	Yes	Analysis
31	Mossel Bay Chess Open 2019 (A)	2019-10-04	2019-10-05	Standard	Eden (WEG)	6	6	3.5	Yes	Analysis
32	2019 Western Cape Club Championship (A+B)	2019-10-25	2019-10-27	Standard	Overberg (WOS)	6	5	3	Yes	Analysis
33	Pacaltsdorp Open 2019 (A)	2019-08-30	2019-08-31	Standard	Eden (WEG)	6	6	3	Yes	Analysis
34	Pacaltsdorp Open 2019 (Blitz)	2019-08-29	2019-08-29	Blitz	Eden (WEG)	6	6	6	Yes	Analysis
35	Eden Chess League 2019 (2nd Division)	2019-08-24	2019-08-24	Rapid	Eden (WEG)	5	5	4.5	Yes	Analysis
36	Triangular 2 GEO-MOSS-PAC 2019	2019-05-30	2019-05-30	Blitz	Eden (WEG)	5	5	4	Yes	Analysis
37	Triangular 1 GEO-MOSS-PAC 2019	2019-02-20	2019-02-20	Blitz	Eden (WEG)	8	8	6.5	Yes	Analysis
38	Mossel Bay Open 2018 (A)	2018-09-28	2018-09-29	Standard	Eden (WEG)	6	6	2.5	Yes	Analysis
39	Oyster Rapid 2018	2018-07-07	2018-07-07	Rapid	Eden (WEG)	6	6	5	Yes	Analysis
40	Pacaltsdorp Chess Club Open 2018 (B)	2018-05-25	2018-05-26	Standard	Eden (WEG)	6	5	4.5	Yes	Analysis

#	Games	Start				End
1	12	Tournament Eden Chess League 2019				Tournament Pacaltsdorp Open 2019
		date 2019-08-24	rnd 1	type Rapid	result 1	date 2019-08-30	rnd 1	type Standard	result 1
		Opponent Simons, N (Nazeem)				Opponent Kleinhans, D (Duwin)
2	9	Tournament Pacaltsdorp Chess Club Open 2018				Tournament Oyster Rapid 2018
		date 2018-05-25	rnd 2	type Standard	result 1	date 2018-07-07	rnd 4	type Rapid	result 1
		Opponent Mdiza, L (Lindile)				Opponent Nevin, TW (Tyler)
3	8	Tournament Eden Open 2022				Tournament Interclub Blitz Evening 2022
		date 2022-04-23	rnd 2	type Standard	result 1	date 2022-05-11	rnd 3	type Blitz	result 1
		Opponent Chaava, A (Aaron)				Opponent Barnard, B (Brendon)

#	Games	Start				End
1	10	Tournament Eden Open 2022				Tournament George Open 2022
		date 2022-04-23	rnd 2	type Standard	result 1	date 2022-12-03	rnd 5	type Standard	result 1
		Opponent Chaava, A (Aaron)				Opponent Ncethelo, B (Bongolethu)
2	5	Tournament Mossel Bay Chess Open 2019				Tournament 2019 Western Cape Club Championship
		date 2019-10-05	rnd 4	type Standard	result 1	date 2019-10-26	rnd 2	type Standard	result 1
		Opponent Gibson, A (Amy-Leigh)				Opponent Crookes, J (Jonas)
3	5	Tournament Pacaltsdorp Chess Club Open 2018				Tournament Pacaltsdorp Chess Club Open 2018
		date 2018-05-25	rnd 2	type Standard	result 1	date 2018-05-26	rnd 6	type Standard	result 0.5
		Opponent Mdiza, L (Lindile)				Opponent Oktober, D (Dimitri)

#	Games	Start				End
1	9	Tournament Oyster Rapid 2018				Tournament Knysna Oyster Festival Rapid Chess 2022
		date 2018-07-07	rnd 6	type Rapid	result 1	date 2022-07-02	rnd 3	type Rapid	result 0.5
		Opponent Joseph, C (Cohen-Lee)				Opponent Claassen, M (Mervin)
2	4	Tournament Oyster Rapid 2018				Tournament Oyster Rapid 2018
		date 2018-07-07	rnd 1	type Rapid	result 1	date 2018-07-07	rnd 4	type Rapid	result 1
		Opponent Gelderbloem, C (Craigan)				Opponent Nevin, TW (Tyler)
3	3	Tournament Pacaltsdorp Chess Club 2022				Tournament Pacaltsdorp Chess Club 2022
		date 2022-08-27	rnd 3	type Rapid	result 1	date 2022-08-27	rnd 5	type Rapid	result 1
		Opponent Johnson, A (Azriel)				Opponent Meyer, PJ (Pravin)

#	Games	Start				End
1	8	Tournament Interclub Blitz Evening 2022				Tournament Interclub Blitz Evening 2022
		date 2022-06-08	rnd 3	type Blitz	result 1	date 2022-08-11	rnd 4	type Blitz	result 1
		Opponent Williams, E (Elia)				Opponent Jaars, T (Thomas)
2	7	Tournament Pacaltsdorp Chess Club Open 2023				Tournament Mossel Bay Open 2023
		date 2023-08-25	rnd 2	type Blitz	result 1	date 2023-09-29	rnd 2	type Blitz	result 1
		Opponent Gilbert, C (Cheslyn)				Opponent Cloete, R (Ralph)
3	7	Tournament Triangular 1 GEO-MOSS-PAC 2019				Tournament Triangular 2 GEO-MOSS-PAC 2019
		date 2019-02-20	rnd 6	type Blitz	result 0.5	date 2019-05-30	rnd 4	type Blitz	result 1
		Opponent Jaars, T (Thomas)				Opponent Daniels, R (Reuben)

#	Games	Start				End
1	10	Tournament Eden Chess League 2019				Tournament Pacaltsdorp Open 2019
		date 2019-08-24	rnd 3	type Rapid	result 1	date 2019-08-30	rnd 1	type Standard	result 1
		Opponent Nomdie, J (Jodi)				Opponent Kleinhans, D (Duwin)
2	7	Tournament Pacaltsdorp Chess Club Open 2023				Tournament Pacaltsdorp Chess Club Open 2023
		date 2023-08-25	rnd 2	type Blitz	result 1	date 2023-08-26	rnd 2	type Rapid	result 1
		Opponent Gilbert, C (Cheslyn)				Opponent Jones, E (Edward)
3	6	Tournament Interclub Blitz Evening 2022				Tournament Knysna Oyster Festival Rapid Chess 2022
		date 2022-06-08	rnd 3	type Blitz	result 1	date 2022-07-02	rnd 2	type Rapid	result 1
		Opponent Williams, E (Elia)				Opponent Hendricks, J (Jereldo)

#	Games	Start				End
1	5	Tournament Mossel Bay Chess Open 2019				Tournament 2019 Western Cape Club Championship
		date 2019-10-05	rnd 4	type Standard	result 1	date 2019-10-26	rnd 2	type Standard	result 1
		Opponent Gibson, A (Amy-Leigh)				Opponent Crookes, J (Jonas)
2	4	Tournament Western Cape Inter Regional 2023				Tournament Mossel Bay Open 2023
		date 2023-03-18	rnd 2	type Standard	result 1	date 2023-09-30	rnd 1	type Standard	result 1
		Opponent Boois, A (Aser)				Opponent Meyer, PJ (Pravin)
3	4	Tournament Eden Open 2022				Tournament Eden Open 2022
		date 2022-04-23	rnd 2	type Standard	result 1	date 2022-04-24	rnd 5	type Standard	result 1
		Opponent Chaava, A (Aaron)				Opponent Meyer, PJ (Pravin)

#	Games	Start				End
1	5	Tournament Eden Chess League 2019				Tournament Knysna Oyster Festival Rapid Chess 2022
		date 2019-08-24	rnd 3	type Rapid	result 1	date 2022-07-02	rnd 2	type Rapid	result 1
		Opponent Nomdie, J (Jodi)				Opponent Hendricks, J (Jereldo)
2	4	Tournament Oyster Rapid 2018				Tournament Oyster Rapid 2018
		date 2018-07-07	rnd 1	type Rapid	result 1	date 2018-07-07	rnd 4	type Rapid	result 1
		Opponent Gelderbloem, C (Craigan)				Opponent Nevin, TW (Tyler)
3	3	Tournament Pacaltsdorp Chess Club 2022				Tournament Pacaltsdorp Chess Club 2022
		date 2022-08-27	rnd 3	type Rapid	result 1	date 2022-08-27	rnd 5	type Rapid	result 1
		Opponent Johnson, A (Azriel)				Opponent Meyer, PJ (Pravin)

#	Games	Start				End
1	8	Tournament Interclub Blitz Evening 2022				Tournament Interclub Blitz Evening 2022
		date 2022-06-08	rnd 3	type Blitz	result 1	date 2022-08-11	rnd 4	type Blitz	result 1
		Opponent Williams, E (Elia)				Opponent Jaars, T (Thomas)
2	7	Tournament Pacaltsdorp Chess Club Open 2023				Tournament Mossel Bay Open 2023
		date 2023-08-25	rnd 2	type Blitz	result 1	date 2023-09-29	rnd 2	type Blitz	result 1
		Opponent Gilbert, C (Cheslyn)				Opponent Cloete, R (Ralph)
3	6	Tournament Pacaltsdorp Chess Club 2022				Tournament Interclub Blitz Evening
		date 2022-08-26	rnd 5	type Blitz	result 1	date 2022-10-26	rnd 4	type Blitz	result 1
		Opponent Kruger, S (Sachin)				Opponent Swartbooi, G (Gabriel)

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	Jaars ,T (Thomas)	14	9.5	151.8	2	1	0	1	1	425	11	7.5	154.5
1	Jaars ,T (Thomas)	14	1486.1	1637.9	2	1506.8	1486.1	1	1221.6	1911.1	11	1339	1640.7
2	Meyer ,PJ (Pravin Jody)	12	8.5	177.1	4	2.5	106.2	1	1	425	7	5	182.1
2	Meyer ,PJ (Pravin Jody)	12	1502.9	1680	4	1483.1	1609.2	1	1471.4	1927.9	7	1479.6	1685.1
3	Taute ,C (Clayden)	12	5	-70.8	0	0	0	1	0	-425	11	5	-38.6
3	Taute ,C (Clayden)	12	1726.5	1655.7	0	0	0	1	1254.9	1301.5	11	1889.3	1687.9
4	Agulhas ,J (Justin)	10	5	0	1	0	-425	0	0	0	9	5	47.2
4	Agulhas ,J (Justin)	10	1483.8	1483.8	1	1349.2	1058.8	0	0	0	9	1563	1531
5	Jansen Van Rensburg ,R (Ruan)	7	5.5	242.9	2	1.5	212.5	1	1	425	4	3	212.5
5	Jansen Van Rensburg ,R (Ruan)	7	1383	1625.8	2	1334.3	1595.5	1	1253	1808	4	1338.1	1595.5
6	Swartbooi ,G (Gabriel)	7	6	303.6	0	0	0	1	1	425	6	5	283.3
6	Swartbooi ,G (Gabriel)	7	1474.3	1777.8	0	0	0	1	1438.2	1899.3	6	1281.5	1757.6
7	Swart ,G (George)	6	0	-425	3	0	-425	0	0	0	3	0	-425
7	Swart ,G (George)	6	1609.3	1184.3	3	1555.4	1184.3	0	0	0	3	1679.3	1184.3
8	Cloete ,R (Ralph)	6	2	-141.7	2	0	-425	0	0	0	4	2	0
8	Cloete ,R (Ralph)	6	1475.9	1334.2	2	1472	1050.9	0	0	0	4	1352.6	1475.9
9	Swart ,S (Sune)	6	2.5	-70.8	1	0.5	0	2	1	0	3	1	-141.7
9	Swart ,S (Sune)	6	1452.5	1381.6	1	1442.4	1452.5	2	1219.6	1452.5	3	1272.2	1310.8
10	Barnard ,B (Brendon)	6	5	283.3	0	0	0	0	0	0	6	5	283.3
10	Barnard ,B (Brendon)	6	1458.7	1742.1	0	0	0	0	0	0	6	1260.6	1742.1

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Botha, R (Ralph)

Ratings

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Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms