Chess South Africa Ratings Database

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Personal

Isaacs, WS (William Samuel)

Chess SA id

164013218

FIDE id

Date of birth

1964-08-28 (Adult)

Gender

Male

Region

Cape Winelands (WCW)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-03-23

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1345.2	1343.6	1275.2	1258.3
Raw rating	1345.2	1343.6	1275.2	1258.3
Weighted rating	1342.5	1340.2	1275.2	1258.3
Weighted performance	1137.7	1127.7	0	0
Floor	916.4	921.7	813	813
K-factor	32	32	36	36
Min/Max rating change allowed	134.8	135.1	149	152.6
Highest rating	1470.4 2019-03-01	1470.7 2019-03-01	1313 2018-06-01	1313 2019-12-01
Highest raw rating	1416.4 2019-10-01	1421.7 2019-12-01	1313 2018-01-01	1313 2019-12-01
Highest weighted rating	1416.4 2020-11-01	1421.7 2021-09-01	1313 2018-06-01	1313 2019-12-01
Highest weighted performance	1470.4 2019-03-01	1470.7 2019-03-01	1211.6 2020-03-01	1200 2019-12-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1345.2	1343.6	1275.2	1258.3
Analysis
Rating	1345.2	1343.6	1275.2	1258.3
Raw rating	1345.2	1343.6	1275.2	1258.3
Weighted rating	1342.5	1340.2	1275.2
Weighted performance	1137.7	1127.7	0
K-factor	32	32	36	36
Floor	916.4	921.7	813	813
Max/Min rating change allowed	134.8	135.1	149	152.6
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	1345.2	1343.6	1275.2	1258.3
New weighted rating	1342.9	1340.7	1275.2	1258.3
New weighted performance	1129.9	1120	0	0
Temp new rating	1345.2	1343.6	1275.2	1258.3
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1345.2	1343.6	1275.2	1258.3
New K-factor	32	32	36	36
New floor	916.4	921.7	813	813

Item	Main	Standard	Rapid	Blitz
	0	0	0	0
	6	6	0	0
	16	16	0	0
	27	27	0	0
	18	14	0	4
	0	0	0	0
History	348	329	15	4

Games since
	Main 26	Standard 26		Rapid 0		Blitz 0
Gender	Male
Age group	Adult
Region	Cape Winelands (WCW)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult Male	-1		-1		-1
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	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult 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	6	3.5	58.33	70.8	1288.4	1359.2
Standard	6	3.5	58.33	70.8	1288.4	1359.2
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	100	59.5	59.5	80.8	1251.6	1332.3
Standard	86	53.5	62.21	103.8	1257.2	1361
Rapid	10	5	50	0	1204.5	1204.5
Blitz	4	1	25	-212.5	1248.9	1036.4

Date	Main	Standard	Rapid	Blitz
2025-11-01	1345.2	1343.6	1275.2	1258.3
2025-09-30	1345.2	1343.6	1275.2	1258.3
2025-09-01	1345.2	1343.6	1275.2	1258.3
2025-08-01	1345.2	1343.6	1275.2	1258.3
2025-07-01	1345.2	1343.6	1275.2	1258.3
2025-06-01	1345.2	1343.6	1275.2	1258.3
2025-05-01	1345.2	1343.6	1275.2	1258.3
2025-04-01	1345.2	1343.6	1275.2	1258.3
2025-03-01	1341.8	1340.6	1275.2	1258.3
2025-02-01	1341.8	1340.6	1275.2	1258.3
2025-01-01	1340.4	1335.7	1275.2	1258.3
2024-12-01	1340.4	1335.7	1275.2	1258.3
2024-11-01	1340.4	1335.7	1275.2	1258.3
2024-10-01	1340.7	1337.6	1275.2	1258.3
2024-09-01	1340.7	1337.6	1275.2	1258.3
2024-08-01	1340.7	1337.6	1275.2	1258.3
2024-07-01	1340.7	1337.6	1275.2	1258.3
2024-09-01	1340.7	1337.6	1275.2	1258.3
2024-05-01	1340.7	1337.6	1275.2	1258.3
2024-04-01	1322.6	1318.7	1275.2	1258.3
2024-03-01	1322.6	1318.7	1275.2	1258.3
2024-02-01	1322.6	1318.7	1275.2	1258.3
2024-01-01	1339	1341.4	1275.2	1258.3
2023-12-01	1339	1341.4	1275.2	1258.3

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	SA Braille Open 2025	2025-03-22	2025-03-23	Standard	Cape Winelands (WCW)	6	6	3.5	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	SA Braille Open 2025	2025-03-22	2025-03-23	Standard	Cape Winelands (WCW)	6	6	3.5	Yes	Analysis
2	Strategema Chess October 2024 (Open)	2024-10-05	2024-10-05	Standard	Cape Winelands (WCW)	5	5	2.5	Yes	Analysis
3	South African Braille Open 2024	2024-03-09	2024-03-09	Standard	Cape Winelands (WCW)	5	5	3.5	Yes	Analysis
4	Cape Winelands - Marie Delport Memorial 2024 (Open)	2024-01-27	2024-01-28	Standard	Cape Winelands (WCW)	6	6	3	Yes	Analysis
5	2023 Western Cape Rural Cup (Open)	2023-12-09	2023-12-10	Standard	Cape Winelands (WCW)	5	4	0	Yes	Analysis
6	Strategema 2023 (Open)	2023-05-13	2023-05-13	Standard	Cape Winelands (WCW)	5	5	3	Yes	Analysis
7	SA Braille South 2023	2023-03-18	2023-03-19	Standard	Cape Winelands (WCW)	5	5	2.5	Yes	Analysis
8	Braille Top 8 2023	2023-03-20	2023-03-21	Standard	Cape Winelands (WCW)	7	7	5.5	Yes	Analysis
9	Marie Delport Memorial 2023 (Open)	2023-01-21	2023-01-21	Standard	Cape Winelands (WCW)	6	6	4	Yes	Analysis
10	Western Cape Closed Championship 2022 (Prestige)	2022-09-24	2022-09-25	Standard	Cape Winelands (WCW)	6	0	0	No	Analysis
11	WCCA Rural Cup 2022 (Open)	2022-08-13	2022-08-14	Standard	Overberg (WOS)	5	4	3	Yes	Analysis
12	WCCA Rural Cup Blitz 2022	2022-07-12	2022-07-12	Blitz	Overberg (WOS)	5	4	1	Yes	Analysis
13	SA Braille 2022	2022-04-16	2022-04-17	Standard	Cape Winelands (WCW)	5	5	3.5	Yes	Analysis
14	Cape Winelands Open 2022 (Braille)	2022-02-12	2022-02-13	Standard	Cape Winelands (WCW)	6	5	3	Yes	Analysis
15	Robertson Chess 2020 (Open)	2020-03-07	2020-03-07	Rapid	Cape Winelands (WCW)	5	5	3	Yes	Analysis
16	Robertson Strategema 2019 (Open)	2019-10-05	2019-10-05	Rapid	Cape Winelands (WCW)	5	5	2	Yes	Analysis
17	Braille Top 8 2019	2019-09-14	2019-09-15	Standard	Cape Winelands (WCW)	7	7	4.5	Yes	Analysis
18	SA Braille Worcester 2019	2019-03-23	2019-03-24	Standard	Cape Winelands (WCW)	5	5	4	Yes	Analysis
19	Braille Top 8 2019	2019-03-21	2019-03-22	Standard	Cape Winelands (WCW)	7	7	6	Yes	Analysis
20	Sa Braille Worcester Open 2018	2018-04-27	2018-04-28	Standard	Cape Winelands (WCW)	7	4	2	Yes	Analysis

#	Games	Start				End
1	7	Tournament Sa Braille Worcester Open 2018				Tournament Braille Top 8 2019
		date 2018-04-27	rnd 5	type Standard	result 1	date 2019-03-21	rnd 6	type Standard	result 1
		Opponent Leonard, C (Clyde)				Opponent Leonard, C (Clyde)
2	6	Tournament Braille Top 8 2023				Tournament Strategema 2023
		date 2023-03-20	rnd 3	type Standard	result 1	date 2023-05-13	rnd 1	type Standard	result 1
		Opponent Rahn, MC (Marlene)				Opponent Conradie, AF (Abram)
3	6	Tournament Braille Top 8 2019				Tournament Robertson Strategema 2019
		date 2019-09-14	rnd 3	type Standard	result 1	date 2019-10-05	rnd 1	type Rapid	result 1
		Opponent Brown, S (Sam)				Opponent Uys, J (Jacques)

#	Games	Start				End
1	7	Tournament Sa Braille Worcester Open 2018				Tournament Braille Top 8 2019
		date 2018-04-27	rnd 5	type Standard	result 1	date 2019-03-21	rnd 6	type Standard	result 1
		Opponent Leonard, C (Clyde)				Opponent Leonard, C (Clyde)
2	6	Tournament Braille Top 8 2023				Tournament Strategema 2023
		date 2023-03-20	rnd 3	type Standard	result 1	date 2023-05-13	rnd 1	type Standard	result 1
		Opponent Rahn, MC (Marlene)				Opponent Conradie, AF (Abram)
3	6	Tournament Braille Top 8 2019				Tournament Cape Winelands Open 2022
		date 2019-09-14	rnd 3	type Standard	result 1	date 2022-02-12	rnd 2	type Standard	result 1
		Opponent Brown, S (Sam)				Opponent Bresler, C (Conrad)

#	Games	Start				End
1	2	Tournament Robertson Chess 2020				Tournament Robertson Chess 2020
		date 2020-03-07	rnd 1	type Rapid	result 1	date 2020-03-07	rnd 2	type Rapid	result 1
		Opponent Rossouw, J (Joan)				Opponent Conradie, AF (Abram)
2	1	Tournament Robertson Chess 2020				Tournament Robertson Chess 2020
		date 2020-03-07	rnd 4	type Rapid	result 1	date 2020-03-07	rnd 4	type Rapid	result 1
		Opponent Isaacs, W (Wesley)				Opponent Isaacs, W (Wesley)
3	1	Tournament Robertson Strategema 2019				Tournament Robertson Strategema 2019
		date 2019-10-05	rnd 4	type Rapid	result 1	date 2019-10-05	rnd 4	type Rapid	result 1
		Opponent Henning, J (Johan)				Opponent Henning, J (Johan)

#	Games	Start				End
1	1	Tournament WCCA Rural Cup Blitz 2022				Tournament WCCA Rural Cup Blitz 2022
		date 2022-07-12	rnd 3	type Blitz	result 1	date 2022-07-12	rnd 3	type Blitz	result 1
		Opponent Bosman, B (Burnito)				Opponent Bosman, B (Burnito)

#	Games	Start				End
1	7	Tournament Sa Braille Worcester Open 2018				Tournament Braille Top 8 2019
		date 2018-04-27	rnd 5	type Standard	result 1	date 2019-03-21	rnd 6	type Standard	result 1
		Opponent Leonard, C (Clyde)				Opponent Leonard, C (Clyde)
2	4	Tournament Braille Top 8 2019				Tournament Robertson Strategema 2019
		date 2019-09-14	rnd 5	type Standard	result 1	date 2019-10-05	rnd 1	type Rapid	result 1
		Opponent Theunis, DP (Desmond)				Opponent Uys, J (Jacques)
3	3	Tournament South African Braille Open 2024				Tournament Strategema Chess October 2024
		date 2024-03-09	rnd 5	type Standard	result 1	date 2024-10-05	rnd 2	type Standard	result 1
		Opponent Bresler, C (Conrad)				Opponent Davids, JW (Jo-Wayne)

#	Games	Start				End
1	7	Tournament Sa Braille Worcester Open 2018				Tournament Braille Top 8 2019
		date 2018-04-27	rnd 5	type Standard	result 1	date 2019-03-21	rnd 6	type Standard	result 1
		Opponent Leonard, C (Clyde)				Opponent Leonard, C (Clyde)
2	4	Tournament Braille Top 8 2019				Tournament Cape Winelands Open 2022
		date 2019-09-14	rnd 5	type Standard	result 1	date 2022-02-12	rnd 2	type Standard	result 1
		Opponent Theunis, DP (Desmond)				Opponent Bresler, C (Conrad)
3	3	Tournament South African Braille Open 2024				Tournament Strategema Chess October 2024
		date 2024-03-09	rnd 5	type Standard	result 1	date 2024-10-05	rnd 2	type Standard	result 1
		Opponent Bresler, C (Conrad)				Opponent Davids, JW (Jo-Wayne)

#	Games	Start				End
1	2	Tournament Robertson Chess 2020				Tournament Robertson Chess 2020
		date 2020-03-07	rnd 1	type Rapid	result 1	date 2020-03-07	rnd 2	type Rapid	result 1
		Opponent Rossouw, J (Joan)				Opponent Conradie, AF (Abram)
2	1	Tournament Robertson Chess 2020				Tournament Robertson Chess 2020
		date 2020-03-07	rnd 4	type Rapid	result 1	date 2020-03-07	rnd 4	type Rapid	result 1
		Opponent Isaacs, W (Wesley)				Opponent Isaacs, W (Wesley)
3	1	Tournament Robertson Strategema 2019				Tournament Robertson Strategema 2019
		date 2019-10-05	rnd 4	type Rapid	result 1	date 2019-10-05	rnd 4	type Rapid	result 1
		Opponent Henning, J (Johan)				Opponent Henning, J (Johan)

#	Games	Start				End
1	1	Tournament WCCA Rural Cup Blitz 2022				Tournament WCCA Rural Cup Blitz 2022
		date 2022-07-12	rnd 3	type Blitz	result 1	date 2022-07-12	rnd 3	type Blitz	result 1
		Opponent Bosman, B (Burnito)				Opponent Bosman, B (Burnito)

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	Liebenberg ,FW (Frederick Willem)	9	2	-236.1	9	2	-236.1	0	0	0	0	0	0
1	Liebenberg ,FW (Frederick Willem)	9	1547.1	1311	9	1547	1311	0	0	0	0	0	0
2	Richter ,HL (Heinrich Lodewikus)	7	3.5	0	6	3.5	70.8	1	0	-425	0	0	0
2	Richter ,HL (Heinrich Lodewikus)	7	1319.4	1319.4	6	1314.8	1390.2	1	1272.7	894.4	0	0	0
3	Rossouw ,J (Joan)	6	5	283.3	4	4	425	2	1	0	0	0	0
3	Rossouw ,J (Joan)	6	1123.9	1407.2	4	1093.1	1548.9	2	1200.2	1123.9	0	0	0
4	Klue ,CR (Christiaan Reue)	5	4.5	340	5	4.5	340	0	0	0	0	0	0
4	Klue ,CR (Christiaan Reue)	5	1152.8	1492.8	5	1151.6	1492.8	0	0	0	0	0	0
5	Bresler ,C (Conrad)	5	4.5	340	5	4.5	340	0	0	0	0	0	0
5	Bresler ,C (Conrad)	5	1154.5	1494.5	5	1143.6	1494.5	0	0	0	0	0	0
6	Geyer ,D (David)	5	2.5	0	4	2.5	106.2	1	0	-425	0	0	0
6	Geyer ,D (David)	5	1265.3	1265.3	4	1263.7	1371.5	1	1211	840.3	0	0	0
7	Conradie ,AF (Abram Francois)	4	3	212.5	3	2	141.7	1	1	425	0	0	0
7	Conradie ,AF (Abram Francois)	4	1157.9	1370.4	3	1150.2	1299.6	1	1110.2	1582.9	0	0	0
8	Theunis ,DP (Desmond Philip)	3	2	141.7	3	2	141.7	0	0	0	0	0	0
8	Theunis ,DP (Desmond Philip)	3	1343.3	1485	3	1348.8	1485	0	0	0	0	0	0
9	Rahn ,MC (Marlene Catherina)	3	3	425	3	3	425	0	0	0	0	0	0
9	Rahn ,MC (Marlene Catherina)	3	1001	1426	3	1000.3	1426	0	0	0	0	0	0
10	Lucas ,M (Melvyn)	3	0.5	-283.3	3	0.5	-283.3	0	0	0	0	0	0
10	Lucas ,M (Melvyn)	3	1423.6	1140.3	3	1419	1140.3	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Isaacs, WS (William Samuel)

Ratings

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Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms