Chess South Africa Ratings Database

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Personal

Ahrense, C (Cullen)

Chess SA id

1130135809

FIDE id

534016147

Date of birth

2013-07-23 (U14)

Gender

Male

Region

Eden (WEG)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-12-17

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1646.4	1644.8	1327.1	1234.2
Raw rating	1609.8	1604.1	1322.3	1234.2
Weighted rating	1646.4	1644.8	1327.1	1220.5
Weighted performance	1502.3	1500.3	1222.2	0
Floor	1181.8	1177	859.2	734.2
K-factor	28	28	36	36
Min/Max rating change allowed	92.5	93.2	139.3	157.9
Highest rating	1700 2024-05-01	1695.1 2024-05-01	1649.4 2022-10-01	1234.2 2025-05-05
Highest raw rating	1681.8 2024-06-01	1677 2024-06-01	1359.2 2025-05-05	1234.2 2025-05-05
Highest weighted rating	1681.8 2025-04-01	1677 2025-05-05	1326.8 2025-11-01	1210.3 2025-08-01
Highest weighted performance	1700 2024-05-01	1695.1 2024-05-01	1649.4 2022-10-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	-2.5	-2.6	0.1	0
New rating	1643.9	1642.1	1327.2	1234.2
Analysis
Rating	1646.4	1644.8	1327.1	1234.2
Raw rating	1609.8	1604.1	1322.3	1234.2
Weighted rating	1646.4	1644.8	1327.1
Weighted performance	1502.3	1500.3	1222.2
K-factor	28	28	36	36
Floor	1181.8	1177	859.2	734.2
Max/Min rating change allowed	92.5	93.2	139.3	157.9
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	1609.8	1604.1	1322.3	1234.2
New weighted rating	1643.9	1642.1	1327.2	1222.3
New weighted performance	1492.2	1490.2	1213.5	0
Temp new rating	1643.9	1642.1	1327.2	1234.2
Temp new rating +/-	-2.5	-2.6	0.1	0
Final new rating +/-	-2.5	-2.6	0.1	0
New rating	1643.9	1642.1	1327.2	1234.2
New K-factor	28	28	36	36
New floor	1181.8	1177	859.2	734.2

Item	Main	Standard	Rapid	Blitz
	0	0	0	0
	89	55	23	11
	67	57	10	0
	23	23	0	0
	57	52	5	0
	0	0	0	0
History	236	187	38	11

Games since
	Main 156	Standard 112		Rapid 33		Blitz 11
Gender	Male
Age group	U14
Region	Eden (WEG)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	453		139		25
Male	419		129		23
U14	37		11		4
U14 Male	36		10		4
Standard
	RSA		Province		Region
Overall	422		121		18
Male	387		112		17
U14	35		10		4
U14 Male	34		9		4
Rapid
	RSA		Province		Region
Overall	898		457		36
Male	740		377		31
U14	195		103		8
U14 Male	150		82		6
Blitz
	RSA		Province		Region
Overall	403		156		62
Male	369		145		57
U14	37		13		7
U14 Male	31		12		6


	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	89	49.5	55.62	47.8	1475.5	1523.2
Standard	55	38	69.09	162.3	1425.7	1588
Rapid	23	9	39.13	-92.4	1544.8	1452.4
Blitz	11	2.5	22.73	-231.8	1579.7	1347.9
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	236	163	69.07	162.1	1383.8	1545.9
Standard	187	139.5	74.6	209.1	1352.2	1561.3
Rapid	38	21	55.26	44.7	1482.8	1527.5
Blitz	11	2.5	22.73	-231.8	1579.7	1347.9

Date	Main	Standard	Rapid	Blitz
2026-01-01	1609.8	1604.1	1322.3	1234.2
2025-11-30	1646.7	1651.2	1322.3	1234.2
2025-11-01	1646.7	1651.2	1322.3	1234.2
2025-09-30	1654.9	1651.2	1325.1	1234.2
2025-09-01	1620.3	1612.5	1325.1	1234.2
2025-08-01	1643.2	1639.2	1325.1	1234.2
2025-07-01	1640.4	1636	1324.4	1234.2
2025-06-01	1632.6	1628.3	1323.2	1234.2
2025-05-01	1631.1	1629.1	1359.2	1234.2
2025-04-01	1658.2	1658.6	1349.4	1200
2025-03-01	1662.4	1667.7	1349.4	1200
2025-02-01	1672.3	1674.8	1349.4	1200
2025-01-01	1672.3	1674.8	1349.4	1200
2024-12-01	1672.3	1674.8	1349.4	1200
2024-11-01	1667.3	1674.8	1304.8	1200
2024-10-01	1678	1674.8	1301.2	1200
2024-09-01	1668.7	1666.1	1301.2	1200
2024-11-01	1647.8	1638.1	1301.2	1200
2024-07-01	1656.9	1647.9	1301.2	1200
2024-06-01	1681.8	1677	1301.2	1200
2024-05-01	1661.2	1662.5	1301.2	1200
2024-04-01	1622.2	1614.3	1301.2	1200
2024-03-01	1505.9	1477.8	1301.2	1200
2024-02-01	1531.4	1502.4	1301.2	1200

Comming soon.

Tournaments

History

No tournaments found.

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis

No tournaments found.

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	2025 Mzansi Inter Provincial Team Championships (U14 Open)	2025-12-15	2025-12-17	Standard	Nelson Mandela Bay (ENM)	6	6	2	Yes	Analysis
2	HCPS Invitational Rapid Tournament 2025 (U13)	2025-10-18	2025-10-18	Rapid	Eden (WEG)	6	6	3	Yes	Analysis
3	Western Cape Schools - Top Schools 2025 (U13)	2025-09-06	2025-09-07	Standard	Overberg (WOS)	6	6	5.5	Yes	Analysis
4	Eden Top Schools 2025 (U13)	2025-08-16	2025-08-16	Standard	Eden (WEG)	5	5	3.5	Yes	Analysis
5	George Top Schools 2025 (U13)	2025-07-26	2025-07-26	Standard	Eden (WEG)	5	5	4	Yes	Analysis
6	Western Cape Schools Individual Championship 2025 (U13 Boys)	2025-05-17	2025-05-18	Standard	Cape Winelands (WCW)	6	6	2.5	Yes	Analysis
7	Southern Knights Rapid 2025 (B)	2025-05-03	2025-05-03	Rapid	Eden (WEG)	7	7	3	Yes	Analysis
8	FIDE World Cadet & Youth Rapid & Blitz Championships 2025 (Blitz)	2025-04-16	2025-04-17	Blitz	Geece (GRE)	11	11	2.5	Yes	Analysis
9	FIDE World Cadet & Youth Rapid & Blitz Championships 2025 (Rapid)	2025-04-13	2025-04-15	Rapid	Greece (GRE)	11	10	3	Yes	Analysis
10	Eden Chess Trials 2 2025 (U14)	2025-03-15	2025-04-12	Standard	Eden (WEG)	10	5	4.5	Yes	Analysis
11	South African Junior Closed Chess Championships 2025 (U12 Open)	2025-03-31	2025-04-05	Standard	Cape Winelands (WCW)	9	9	4	Yes	Analysis
12	Eden Schools Chess Trials 1 2025 (U13 Boys)	2025-03-08	2025-03-08	Standard	Eden (WEG)	5	5	3.5	Yes	Analysis
13	George Schools Chess Trials 3 2025 (U13 Boys)	2025-03-01	2025-03-01	Standard	Eden (WEG)	5	5	4	Yes	Analysis
14	George Schools Chess Trials 2 2025 (U13 Boys)	2025-02-15	2025-02-15	Standard	Eden (WEG)	5	4	3.5	Yes	Analysis
15	George Schools Chess Trials 1 2025 (U13 Boys)	2025-02-01	2025-02-01	Standard	Eden (WEG)	5	5	3	Yes	Analysis
16	Eden Gambit Chess Tournament 2024 (C)	2024-11-02	2024-11-02	Rapid	Eden (WEG)	5	5	4	Yes	Analysis
17	George Suid Senior Skaaktoernooi 2024	2024-10-26	2024-10-26	Rapid	Eden (WEG)	5	5	3	Yes	Analysis
18	Western Cape Top Schools Championship 2024 (U11 Mixed)	2024-08-30	2024-09-01	Standard	Eden (WEG)	6	6	5	Yes	Analysis
19	Eden Top Schools 2024 (U11 Open)	2024-08-17	2024-08-17	Standard	Eden (WEG)	5	5	5	Yes	Analysis
20	George Primary Top Schools 2024 (U11)	2024-07-20	2024-07-20	Standard	Eden (WEG)	5	5	3.5	Yes	Analysis
21	Eden Open 2024 (C)	2024-06-22	2024-06-22	Standard	Eden (WEG)	5	5	3	Yes	Analysis
22	Western Cape PS Individuals Championship 2024 (U11 Boys)	2024-05-04	2024-05-05	Standard	West Coast (WCU)	6	6	5	Yes	Analysis
23	Eden Chess Trials 2 2024 (U12)	2024-04-13	2024-04-20	Standard	Eden (WEG)	10	10	8	Yes	Analysis
24	Eden School Chess Trials 1 2024 (U11 Boys)	2024-03-09	2024-03-09	Standard	Eden (WEG)	5	5	5	Yes	Analysis
25	George Schools Trials 3 2024 (U11 Boys)	2024-03-02	2024-03-02	Standard	Eden (WEG)	5	5	5	Yes	Analysis
26	George Schools Trials 2 2024 (U11 Boys)	2024-02-17	2024-02-17	Standard	Eden (WEG)	5	5	3	Yes	Analysis
27	George Schools Trials 1 2024 (U11 Boys)	2024-02-03	2024-02-03	Standard	Eden (WEG)	5	5	4	Yes	Analysis
28	Western Cape Top Schools 2023 (U11 Mixed)	2023-09-02	2023-09-03	Standard	Cape Winelands (WCW)	6	6	5	Yes	Analysis
29	Eden Top Schools 2023 (U11 Mix)	2023-08-19	2023-08-19	Standard	Eden (WEG)	5	4	3.5	Yes	Analysis
30	Top Schools 2023 (U11)	2023-07-29	2023-07-29	Standard	Eden (WEG)	5	4	4	Yes	Analysis
31	George Chess Trials 3 2023 (U11 Boys)	2023-02-25	2023-02-25	Standard	Eden (WEG)	5	5	2	Yes	Analysis
32	George Chess Trials 1 2023 (U11 Boys)	2023-01-28	2023-01-28	Standard	Eden (WEG)	5	4	3	Yes	Analysis
33	George Open 2022 (C)	2022-12-03	2022-12-03	Standard	Eden (WEG)	5	5	3	Yes	Analysis
34	George-Suid Senior Skaaktoernooi 2022	2022-10-22	2022-10-22	Rapid	Eden (WEG)	5	5	5	Yes	Analysis
35	Western Cape Top Schools 2022 (U9 Mix)	2022-09-16	2022-09-17	Standard	Overberg (WOS)	5	5	4.5	Yes	Analysis
36	Eden Topskole 2022 (O9 Ope)	2022-08-13	2022-08-13	Standard	Eden (WEG)	6	6	5	Yes	Analysis
37	George Topskole 2022 (O9)	2022-07-30	2022-07-30	Standard	Eden (WEG)	5	5	4	Yes	Analysis
38	George Open 2022 (D)	2022-06-11	2022-06-11	Standard	Eden (WEG)	5	5	3	Yes	Analysis
39	Western Cape Schools 2022 (U9 Boys)	2022-05-28	2022-05-29	Standard	Cape Winelands (WCW)	6	6	3	Yes	Analysis
40	Eden Proewe 2 2022 (O9 Seuns)	2022-04-09	2022-04-09	Standard	Eden (WEG)	5	5	4	Yes	Analysis
41	Eden Proewe 1 2022 (O9 Seuns)	2022-03-12	2022-03-12	Standard	Eden (WEG)	5	5	3.5	Yes	Analysis
42	George Trials 2 2022 (U9)	2022-02-12	2022-02-12	Standard	Eden (WEG)	5	5	4	Yes	Analysis
43	George Trials 1 2022 (U9)	2022-01-29	2022-01-29	Standard	Eden (WEG)	5	5	3.5	Yes	Analysis

#	Games	Start				End
1	18	Tournament Eden Topskole 2022				Tournament George Open 2022
		date 2022-08-13	rnd 2	type Standard	result 1	date 2022-12-03	rnd 3	type Standard	result 1
		Opponent Pentz, J (Jason)				Opponent Mpuru, M (Moyisi)
2	17	Tournament George Schools Trials 2 2024				Tournament Eden Chess Trials 2 2024
		date 2024-02-17	rnd 4	type Standard	result 1	date 2024-04-13	rnd 5	type Standard	result 1
		Opponent Matthee, R (Ruan)				Opponent Greeff, M (Mari)
3	12	Tournament George Schools Chess Trials 2 2025				Tournament Eden Schools Chess Trials 1 2025
		date 2025-02-15	rnd 2	type Standard	result 1	date 2025-03-08	rnd 3	type Standard	result 1
		Opponent Mbomvana, A (Aluta)				Opponent Steenberg, H (Hendre)

#	Games	Start				End
1	17	Tournament George Schools Trials 2 2024				Tournament Eden Chess Trials 2 2024
		date 2024-02-17	rnd 4	type Standard	result 1	date 2024-04-13	rnd 5	type Standard	result 1
		Opponent Matthee, R (Ruan)				Opponent Greeff, M (Mari)
2	13	Tournament Eden Topskole 2022				Tournament George Open 2022
		date 2022-08-13	rnd 2	type Standard	result 1	date 2022-12-03	rnd 3	type Standard	result 1
		Opponent Pentz, J (Jason)				Opponent Mpuru, M (Moyisi)
3	12	Tournament George Schools Chess Trials 2 2025				Tournament Eden Schools Chess Trials 1 2025
		date 2025-02-15	rnd 2	type Standard	result 1	date 2025-03-08	rnd 3	type Standard	result 1
		Opponent Mbomvana, A (Aluta)				Opponent Steenberg, H (Hendre)

#	Games	Start				End
1	6	Tournament George-Suid Senior Skaaktoernooi 2022				Tournament George Suid Senior Skaaktoernooi 2024
		date 2022-10-22	rnd 1	type Rapid	result 1	date 2024-10-26	rnd 1	type Rapid	result 1
		Opponent Mackway-Wilson, J (Jonathan)				Opponent Brewis, F (Fox)
2	4	Tournament Eden Gambit Chess Tournament 2024				Tournament Eden Gambit Chess Tournament 2024
		date 2024-11-02	rnd 1	type Rapid	result 1	date 2024-11-02	rnd 4	type Rapid	result 1
		Opponent Verster, J (Juan Marais)				Opponent Van Der Westhuizen, B (Benjamin)
3	2	Tournament FIDE World Cadet & Youth Rapid & Blitz Championships 2025				Tournament FIDE World Cadet & Youth Rapid & Blitz Championships 2025
		date 2025-04-14	rnd 5	type Rapid	result 0.5	date 2025-04-14	rnd 6	type Rapid	result 1
		Opponent Simon, Riley				Opponent Van Loggerenberg, Elandre

#	Games	Start				End
1	1	Tournament FIDE World Cadet & Youth Rapid & Blitz Championships 2025				Tournament FIDE World Cadet & Youth Rapid & Blitz Championships 2025
		date 2025-04-17	rnd 10	type Blitz	result 0.5	date 2025-04-17	rnd 10	type Blitz	result 0.5
		Opponent Marner, Bryan Neil				Opponent Marner, Bryan Neil
2	1	Tournament FIDE World Cadet & Youth Rapid & Blitz Championships 2025				Tournament FIDE World Cadet & Youth Rapid & Blitz Championships 2025
		date 2025-04-17	rnd 8	type Blitz	result 1	date 2025-04-17	rnd 8	type Blitz	result 1
		Opponent Kaloudis, Georgios				Opponent Kaloudis, Georgios
3	1	Tournament FIDE World Cadet & Youth Rapid & Blitz Championships 2025				Tournament FIDE World Cadet & Youth Rapid & Blitz Championships 2025
		date 2025-04-16	rnd 3	type Blitz	result 1	date 2025-04-16	rnd 3	type Blitz	result 1
		Opponent Lamprianos, Michail Angelos				Opponent Lamprianos, Michail Angelos

#	Games	Start				End
1	15	Tournament George Schools Trials 2 2024				Tournament Eden Chess Trials 2 2024
		date 2024-02-17	rnd 4	type Standard	result 1	date 2024-04-13	rnd 3	type Standard	result 1
		Opponent Matthee, R (Ruan)				Opponent Pringle, K (Kirsten)
2	11	Tournament Western Cape Top Schools 2022				Tournament George Open 2022
		date 2022-09-17	rnd 3	type Standard	result 1	date 2022-12-03	rnd 3	type Standard	result 1
		Opponent Anderson, J (Jean)				Opponent Mpuru, M (Moyisi)
3	10	Tournament George Primary Top Schools 2024				Tournament Western Cape Top Schools Championship 2024
		date 2024-07-20	rnd 5	type Standard	result 1	date 2024-08-30	rnd 4	type Standard	result 1
		Opponent Stevens, J (Jason Adriaan)				Opponent Krynauw, E (Eben)

#	Games	Start				End
1	15	Tournament George Schools Trials 2 2024				Tournament Eden Chess Trials 2 2024
		date 2024-02-17	rnd 4	type Standard	result 1	date 2024-04-13	rnd 3	type Standard	result 1
		Opponent Matthee, R (Ruan)				Opponent Pringle, K (Kirsten)
2	10	Tournament George Primary Top Schools 2024				Tournament Western Cape Top Schools Championship 2024
		date 2024-07-20	rnd 5	type Standard	result 1	date 2024-08-30	rnd 4	type Standard	result 1
		Opponent Stevens, J (Jason Adriaan)				Opponent Krynauw, E (Eben)
3	6	Tournament Eden Top Schools 2023				Tournament Western Cape Top Schools 2023
		date 2023-08-19	rnd 4	type Standard	result 1	date 2023-09-02	rnd 4	type Standard	result 1
		Opponent Riddles, C (Cleawin)				Opponent Krynauw, E (Eben)

#	Games	Start				End
1	6	Tournament George-Suid Senior Skaaktoernooi 2022				Tournament George Suid Senior Skaaktoernooi 2024
		date 2022-10-22	rnd 1	type Rapid	result 1	date 2024-10-26	rnd 1	type Rapid	result 1
		Opponent Mackway-Wilson, J (Jonathan)				Opponent Brewis, F (Fox)
2	4	Tournament Eden Gambit Chess Tournament 2024				Tournament Eden Gambit Chess Tournament 2024
		date 2024-11-02	rnd 1	type Rapid	result 1	date 2024-11-02	rnd 4	type Rapid	result 1
		Opponent Verster, J (Juan Marais)				Opponent Van Der Westhuizen, B (Benjamin)
3	2	Tournament George Suid Senior Skaaktoernooi 2024				Tournament George Suid Senior Skaaktoernooi 2024
		date 2024-10-26	rnd 3	type Rapid	result 1	date 2024-10-26	rnd 4	type Rapid	result 1
		Opponent Pfaff, J (Joel)				Opponent Schmidt, U (Ulrich)

#	Games	Start				End
1	1	Tournament FIDE World Cadet & Youth Rapid & Blitz Championships 2025				Tournament FIDE World Cadet & Youth Rapid & Blitz Championships 2025
		date 2025-04-17	rnd 8	type Blitz	result 1	date 2025-04-17	rnd 8	type Blitz	result 1
		Opponent Kaloudis, Georgios				Opponent Kaloudis, Georgios
2	1	Tournament FIDE World Cadet & Youth Rapid & Blitz Championships 2025				Tournament FIDE World Cadet & Youth Rapid & Blitz Championships 2025
		date 2025-04-16	rnd 3	type Blitz	result 1	date 2025-04-16	rnd 3	type Blitz	result 1
		Opponent Lamprianos, Michail Angelos				Opponent Lamprianos, Michail Angelos

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	Marner ,B (Bryan Neil)	9	5	47.2	6	4	141.7	3	1	-141.7	0	0	0
1	Marner ,B (Bryan Neil)	9	1495.7	1542.9	6	1466	1637.3	3	1337.9	1354	0	0	0
2	Pentz ,J (Jason)	8	7	318.8	8	7	318.8	0	0	0	0	0	0
2	Pentz ,J (Jason)	8	1314.7	1633.5	8	1298.2	1633.5	0	0	0	0	0	0
3	Steenberg ,H (Hendre)	5	4.5	340	5	4.5	340	0	0	0	0	0	0
3	Steenberg ,H (Hendre)	5	1356.9	1696.9	5	1349.3	1696.9	0	0	0	0	0	0
4	Blignaut ,DC (Dane)	5	2.5	0	5	2.5	0	0	0	0	0	0	0
4	Blignaut ,DC (Dane)	5	1524.3	1524.3	5	1530.1	1524.3	0	0	0	0	0	0
5	Simon ,R (Riley)	5	2	-85	4	2	0	1	0	-425	0	0	0
5	Simon ,R (Riley)	5	1612.6	1527.6	4	1570.5	1612.6	1	1365.4	1187.6	0	0	0
6	Punt ,H (Heinrich)	5	2.5	0	4	1.5	-106.2	1	1	425	0	0	0
6	Punt ,H (Heinrich)	5	1493.5	1493.5	4	1515.7	1387.2	1	1188.7	1918.5	0	0	0
7	Dixon ,A (Arlo)	4	3.5	318.8	4	3.5	318.8	0	0	0	0	0	0
7	Dixon ,A (Arlo)	4	1203.1	1521.8	4	1204.8	1521.8	0	0	0	0	0	0
8	Coleman ,F (Ferdinand)	4	2.5	106.2	4	2.5	106.2	0	0	0	0	0	0
8	Coleman ,F (Ferdinand)	4	1500.1	1606.3	4	1495.9	1606.3	0	0	0	0	0	0
9	Francis ,A (Aaron)	4	2	0	2	1.5	212.5	2	0.5	-212.5	0	0	0
9	Francis ,A (Aaron)	4	1619	1619	2	1531.8	1831.5	2	1342.9	1406.5	0	0	0
10	Moolman ,E (Elzevir)	3	1.5	0	3	1.5	0	0	0	0	0	0	0
10	Moolman ,E (Elzevir)	3	1300.2	1300.2	3	1285.9	1300.2	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Ahrense, C (Cullen)

Ratings

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Last 24 raw ratings

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Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms