Chess South Africa Ratings Database

PLAYER PAGE

Personal

Dortley, D (Devon)

Chess SA id

100071794

FIDE id

Date of birth

2000-05-15 (Adult)

Gender

Male

Region

Ekurhuleni (GE)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-05-01

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1587.7	1628.3	1507	1541.8
Raw rating	1587.7	1626.2	1507	1541.8
Weighted rating	1587.4	1628.3	1506.1	1541.8
Weighted performance	1318.1	1238.9	0	0
Floor	1096.3	1133	1041.8	1041.8
K-factor	32	28	32	32
Min/Max rating change allowed	95.4	90.3	107.1	101.9
Highest rating	1596.3 2024-11-01	1633 2024-11-01	1541.8 2019-09-01	1541.8 2019-09-01
Highest raw rating	1596.3 2024-11-01	1633 2024-11-01	1541.8 2019-12-01	1541.8 2024-03-01
Highest weighted rating	1584.9 2025-08-01	1626.2 2025-08-01	1541.8 2019-09-01	1541.8 2019-09-01
Highest weighted performance	1524 2024-11-01	1508 2018-01-01	1368.6 2023-09-01	1200 2024-03-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0.3	0.1	0	0
New rating	1587.9	1628.4	1507	1541.8
Analysis
Rating	1587.7	1628.3	1507	1541.8
Raw rating	1587.7	1626.2	1507	1541.8
Weighted rating	1587.4	1628.3	1506.1
Weighted performance	1318.1	1238.9	0
K-factor	32	28	32	32
Floor	1096.3	1133	1041.8	1041.8
Max/Min rating change allowed	95.4	90.3	107.1	101.9
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	1587.7	1626.2	1507	1541.8
New weighted rating	1587.9	1628.4	1506.2	1541.8
New weighted performance	1308.5	1229.4	0	0
Temp new rating	1587.9	1628.4	1507	1541.8
Temp new rating +/-	0.3	0.1	0	0
Final new rating +/-	0.3	0.1	0	0
New rating	1587.9	1628.4	1507	1541.8
New K-factor	32	28	32	32
New floor	1096.3	1133	1041.8	1041.8

Item	Main	Standard	Rapid
	0	0	0
	3	3	0
	10	10	0
	19	14	5
	0	0	0
	0	0	0
History	173	150	23

Games since
	Main 22	Standard 22		Rapid 0		Blitz 0
Gender	Male
Age group	Adult
Region	Ekurhuleni (GE)
Province	Gauteng (GT)
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	3	1	33.33	-141.7	1650.4	1508.7
Standard	3	1	33.33	-141.7	1650.4	1508.7
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	55	37	67.27	146.8	1407.7	1554.6
Standard	50	34	68	153	1416.4	1569.4
Rapid	5	3	60	85	1320.8	1405.8
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1587.7	1626.2	1507	1541.8
2025-09-30	1587.7	1626.2	1507	1541.8
2025-09-01	1587.7	1626.2	1507	1541.8
2025-08-01	1587.7	1626.2	1507	1541.8
2025-07-01	1587.7	1624.9	1507	1541.8
2025-06-01	1587.7	1623.5	1507	1541.8
2025-05-01	1596.3	1633	1507	1541.8
2025-04-01	1596.3	1633	1507	1541.8
2025-03-01	1596.3	1633	1507	1541.8
2025-02-01	1596.3	1633	1507	1541.8
2025-01-01	1596.3	1633	1504.4	1541.8
2024-12-01	1596.3	1633	1504.4	1541.8
2024-11-01	1596.3	1633	1504.4	1541.8
2024-10-01	1574.3	1628	1504.4	1541.8
2024-09-01	1574.3	1628	1504.4	1541.8
2024-08-01	1574.3	1628	1504.4	1541.8
2024-07-01	1574.3	1628	1504.4	1541.8
2024-09-01	1574.3	1628	1504.4	1541.8
2024-05-01	1574.3	1628	1504.4	1541.8
2024-04-01	1574.3	1628	1504.4	1541.8
2024-03-01	1574.3	1628	1504.4	1541.8
2024-02-01	1574.3	1628	1504.4	1541.8
2024-01-01	1543	1606.2	1504.4	1541.8
2023-12-01	1543	1549.1	1504.4	1541.8

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	Moja Chess Extravaganza 2025 (B)	2025-04-26	2025-05-01	Standard	Johannesburg Metro (GJM)	9	3	1	Yes	Analysis
2	Moja Chess Extravaganza 2025 (Blitz)	2025-04-26	2025-04-26	Blitz	Johannesburg Metro (GJM)	7	0	0	No	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Moja Chess Extravaganza 2025 (B)	2025-04-26	2025-05-01	Standard	Johannesburg Metro (GJM)	9	3	1	Yes	Analysis
2	Moja Chess Extravaganza 2025 (Blitz)	2025-04-26	2025-04-26	Blitz	Johannesburg Metro (GJM)	7	0	0	No	Analysis
3	Wits Open 2024 (B)	2024-10-12	2024-10-12	Standard	Johannesburg Metro (GJM)	5	5	4.5	Yes	Analysis
4	JMC Kick Off Tournament 2024 (B)	2024-01-28	2024-01-28	Standard	Johannesburg Metro (GJM)	5	5	4.5	Yes	Analysis
5	2023 USSA Championships (Open)	2023-12-04	2023-12-08	Standard	Ethekwini (KED)	9	9	5.5	Yes	Analysis
6	NWU Vaal Open 2023 (A)	2023-10-14	2023-10-14	Standard	Sedibeng (GSV)	5	5	3.5	Yes	Analysis
7	Wits University 100 Chess Tournament 2023	2023-09-30	2023-09-30	Rapid	Johannesburg Metro (GJM)	5	5	3	Yes	Analysis
8	2018 South African Junior Closed Chess Championships (U18 Open)	2018-04-01	2018-04-07	Standard	Chess South Africa (CSA)	11	9	4	Yes	Analysis
9	South African Junior Wildcard Championships 2017 (U18 Open)	2018-01-09	2018-01-12	Standard	4 Knights (4K)	7	7	4.5	Yes	Analysis
10	South African Junior Team Championships 2017 (U18B)	2018-01-04	2018-01-08	Standard	4 Knights (4K)	7	7	6.5	Yes	Analysis

#	Games	Start				End
1	12	Tournament South African Junior Team Championships 2017				Tournament South African Junior Wildcard Championships 2017
		date 2018-01-04	rnd 1	type Standard	result 1	date 2018-01-11	rnd 5	type Standard	result 1
		Opponent Morar, A (Anjali)				Opponent Ramatseliso, T (Thabiso)
2	10	Tournament JMC Kick Off Tournament 2024				Tournament Wits Open 2024
		date 2024-01-28	rnd 1	type Standard	result 1	date 2024-10-12	rnd 5	type Standard	result 1
		Opponent Froom, D (Darryl)				Opponent Egeonu, C (Chizitere)
3	4	Tournament NWU Vaal Open 2023				Tournament NWU Vaal Open 2023
		date 2023-10-14	rnd 1	type Standard	result 1	date 2023-10-14	rnd 4	type Standard	result 0.5
		Opponent Phosa, K (Khauhelo)				Opponent Phakoe, KE (Kgwadi)

#	Games	Start				End
1	12	Tournament South African Junior Team Championships 2017				Tournament South African Junior Wildcard Championships 2017
		date 2018-01-04	rnd 1	type Standard	result 1	date 2018-01-11	rnd 5	type Standard	result 1
		Opponent Morar, A (Anjali)				Opponent Ramatseliso, T (Thabiso)
2	10	Tournament JMC Kick Off Tournament 2024				Tournament Wits Open 2024
		date 2024-01-28	rnd 1	type Standard	result 1	date 2024-10-12	rnd 5	type Standard	result 1
		Opponent Froom, D (Darryl)				Opponent Egeonu, C (Chizitere)
3	4	Tournament NWU Vaal Open 2023				Tournament NWU Vaal Open 2023
		date 2023-10-14	rnd 1	type Standard	result 1	date 2023-10-14	rnd 4	type Standard	result 0.5
		Opponent Phosa, K (Khauhelo)				Opponent Phakoe, KE (Kgwadi)

#	Games	Start				End
1	2	Tournament Wits University 100 Chess Tournament 2023				Tournament Wits University 100 Chess Tournament 2023
		date 2023-09-30	rnd 1	type Rapid	result 1	date 2023-09-30	rnd 2	type Rapid	result 1
		Opponent Mpitula, A (Alone)				Opponent Moje, L (Lethabo)
2	1	Tournament Wits University 100 Chess Tournament 2023				Tournament Wits University 100 Chess Tournament 2023
		date 2023-09-30	rnd 4	type Rapid	result 1	date 2023-09-30	rnd 4	type Rapid	result 1
		Opponent Mak, CTW (Cora)				Opponent Mak, CTW (Cora)

No games found.

#	Games	Start				End

#	Games	Start				End
1	6	Tournament South African Junior Team Championships 2017				Tournament South African Junior Team Championships 2017
		date 2018-01-04	rnd 1	type Standard	result 1	date 2018-01-07	rnd 6	type Standard	result 1
		Opponent Morar, A (Anjali)				Opponent Herman, B (Berjuton-Lee)
2	4	Tournament JMC Kick Off Tournament 2024				Tournament JMC Kick Off Tournament 2024
		date 2024-01-28	rnd 1	type Standard	result 1	date 2024-01-28	rnd 4	type Standard	result 1
		Opponent Froom, D (Darryl)				Opponent Manaka, L (Lethabo)
3	3	Tournament NWU Vaal Open 2023				Tournament NWU Vaal Open 2023
		date 2023-10-14	rnd 1	type Standard	result 1	date 2023-10-14	rnd 3	type Standard	result 1
		Opponent Phosa, K (Khauhelo)				Opponent Emanuel, P (Prithee)

#	Games	Start				End
1	6	Tournament South African Junior Team Championships 2017				Tournament South African Junior Team Championships 2017
		date 2018-01-04	rnd 1	type Standard	result 1	date 2018-01-07	rnd 6	type Standard	result 1
		Opponent Morar, A (Anjali)				Opponent Herman, B (Berjuton-Lee)
2	4	Tournament JMC Kick Off Tournament 2024				Tournament JMC Kick Off Tournament 2024
		date 2024-01-28	rnd 1	type Standard	result 1	date 2024-01-28	rnd 4	type Standard	result 1
		Opponent Froom, D (Darryl)				Opponent Manaka, L (Lethabo)
3	3	Tournament NWU Vaal Open 2023				Tournament NWU Vaal Open 2023
		date 2023-10-14	rnd 1	type Standard	result 1	date 2023-10-14	rnd 3	type Standard	result 1
		Opponent Phosa, K (Khauhelo)				Opponent Emanuel, P (Prithee)

#	Games	Start				End
1	2	Tournament Wits University 100 Chess Tournament 2023				Tournament Wits University 100 Chess Tournament 2023
		date 2023-09-30	rnd 1	type Rapid	result 1	date 2023-09-30	rnd 2	type Rapid	result 1
		Opponent Mpitula, A (Alone)				Opponent Moje, L (Lethabo)
2	1	Tournament Wits University 100 Chess Tournament 2023				Tournament Wits University 100 Chess Tournament 2023
		date 2023-09-30	rnd 4	type Rapid	result 1	date 2023-09-30	rnd 4	type Rapid	result 1
		Opponent Mak, CTW (Cora)				Opponent Mak, CTW (Cora)

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	Rogge ,CG (Conrad Gustav)	2	0	-425	2	0	-425	0	0	0	0	0	0
1	Rogge ,CG (Conrad Gustav)	2	1457.7	1032.7	2	1457.6	1032.7	0	0	0	0	0	0
2	Schnabel ,JE (Emil)	1	0	-425	1	0	-425	0	0	0	0	0	0
2	Schnabel ,JE (Emil)	1	1773.4	1348.4	1	1783.8	1348.4	0	0	0	0	0	0
3	Motlalane ,T (Tumelo)	1	1	425	1	1	425	0	0	0	0	0	0
3	Motlalane ,T (Tumelo)	1	1096	1521	1	1096	1521	0	0	0	0	0	0
4	Maartens ,A (Alexander)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
4	Maartens ,A (Alexander)	1	1406.8	1406.8	1	1406.8	1406.8	0	0	0	0	0	0
5	Jacobs ,CN (Calvin Nicholas)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Jacobs ,CN (Calvin Nicholas)	1	1939.8	1514.8	1	1949.3	1514.8	0	0	0	0	0	0
6	Richter ,J-M (Jan-Michael)	1	1	425	1	1	425	0	0	0	0	0	0
6	Richter ,J-M (Jan-Michael)	1	1564.3	1989.3	1	1564.2	1989.3	0	0	0	0	0	0
7	Marais ,DP (Daniel Petrus)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Marais ,DP (Daniel Petrus)	1	1817	1392	1	1802.2	1392	0	0	0	0	0	0
8	Phakoe ,KE (Kgwadi Ernest)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
8	Phakoe ,KE (Kgwadi Ernest)	1	1398.9	1398.9	1	1419.9	1398.9	0	0	0	0	0	0
9	Van Zyl ,A (Albrecht)	1	1	425	1	1	425	0	0	0	0	0	0
9	Van Zyl ,A (Albrecht)	1	1325.8	1750.8	1	1325.8	1750.8	0	0	0	0	0	0
10	Manaka ,L (Lethabo)	1	1	425	1	1	425	0	0	0	0	0	0
10	Manaka ,L (Lethabo)	1	1280.7	1705.7	1	1200	1705.7	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

Tournaments

Grand Prix

Statistics

Notifications

PLAYER PAGE

Personal

Dortley, D (Devon)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms