Chess South Africa Ratings Database

PLAYER PAGE

Personal

Underwood, A (Alexander)

Chess SA id

1110138056

FIDE id

Date of birth

2011-06-06 (U16)

Gender

Male

Region

Cape Town (WCT)

Citizen

RSA

Titles

Chess SA registered

Yes

Last active game

2025-10-12

Personal details last changed

2025-02-03

Junior GPX Games

Junior GPX Points

1604.8

Item	Main	Standard	Rapid	Blitz
Rating	1573.5	1565.3	1180.8	1200
Raw rating	1573.5	1565.3	1180.8	1200
Weighted rating	1391.4	1387	1180.8	1200
Weighted performance	1548.7	1541	0	0
Floor	1076.8	1067.2	700	700
K-factor	32	32	36	36
Min/Max rating change allowed	97.4	98.5	170.4	165.8
Highest rating	1576.8 2025-08-01	1732.8 2024-09-01	1200 2018-10-01	1200 2018-10-01
Highest raw rating	1576.8 2025-08-01	1567.2 2025-08-01	1200 2020-01-01	1200 2024-02-01
Highest weighted rating	1391.4 2025-11-01	1387 2025-11-01	1200 2018-10-01	1200 2018-10-01
Highest weighted performance	1576.8 2025-08-01	1732.8 2024-09-01	1200 2020-01-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1573.5	1565.3	1180.8	1200
Analysis
Rating	1573.5	1565.3	1180.8	1200
Raw rating	1573.5	1565.3	1180.8	1200
Weighted rating	1391.4	1387	1180.8
Weighted performance	1548.7	1541	0
K-factor	32	32	36	36
Floor	1076.8	1067.2	700	700
Max/Min rating change allowed	97.4	98.5	170.4	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	1573.5	1565.3	1180.8	1200
New weighted rating	1412.1	1406.8	1180.8	1200
New weighted performance	1539.3	1531.7	0	0
Temp new rating	1573.5	1565.3	1180.8	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1573.5	1565.3	1180.8	1200
New K-factor	32	32	36	36
New floor	1076.8	1067.2	700	700

Item	Main	Standard	Rapid
	0	0	0
	30	30	0
	3	3	0
	0	0	0
	5	0	5
	0	0	0
History	38	33	5

Games since
	Main 33	Standard 33		Rapid 0		Blitz 0
Gender	Male
Age group	U16
Region	Cape Town (WCT)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	784		212		136
Male	690		185		120
U16	97		25		15
U16 Male	81		22		13
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	30	19.5	65	127.5	1453.3	1580.8
Standard	30	19.5	65	127.5	1453.3	1580.8
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	38	24.5	64.47	123	1404.9	1527.9
Standard	33	22.5	68.18	154.5	1438.4	1592.9
Rapid	5	2	40	-85	1183.6	1098.6
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1573.5	1565.3	1180.8	1200
2025-09-30	1576.8	1567.2	1180.8	1200
2025-09-01	1576.8	1567.2	1180.8	1200
2025-08-01	1576.8	1567.2	1180.8	1200
2025-07-01	1511.4	1458.5	1180.8	1200
2025-06-01	1511.4	1458.5	1180.8	1200
2025-05-01	1511.4	1458.5	1180.8	1200
2025-04-01	1334.2	1352.4	1180.8	1200
2025-03-01	1265.7	1280.7	1180.8	1200
2025-02-01	1249.5	1269.1	1180.8	1200
2025-01-01	1249.5	1269.1	1180.8	1200
2024-12-01	1249.5	1269.1	1180.8	1200
2024-11-01	1249.5	1269.1	1180.8	1200
2024-10-01	1249.5	1269.1	1180.8	1200
2024-09-01	1186.8	1200	1180.8	1200
2024-08-01	1186.8	1200	1180.8	1200
2024-07-01	1186.8	1200	1180.8	1200
2024-09-01	1186.8	1200	1180.8	1200
2024-05-01	1186.8	1200	1180.8	1200
2024-04-01	1186.8	1200	1180.8	1200
2024-03-01	1186.8	1200	1180.8	1200
2024-02-01	1186.8	1200	1180.8	1200
2024-01-01	1186.8	1200	1180.8	1200
2023-12-01	1186.8	1200	1180.8	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	UCT Open Chess Championship 2025 (Advanced)	2025-10-10	2025-10-12	Standard	Cape Town (WCT)	6	6	3.5	Yes	Analysis
2	Cape Winelands Open 2025 (Advanced)	2025-07-19	2025-07-20	Standard	Cape Winelands (WCW)	6	6	4.5	Yes	Analysis
3	Western Cape Schools Individual Championship 2025 (U15 Boys)	2025-04-26	2025-04-27	Standard	West Coast (WCU)	6	6	4.5	Yes	Analysis
4	CT Metro Schools Individual Closed 2025 (U15 Open)	2025-03-01	2025-03-02	Standard	Cape Town (WCT)	6	6	3.5	Yes	Analysis
5	District South Schools Chess Individual Trials 2025 (U15 Open)	2025-02-01	2025-02-02	Standard	Cape Town (WCT)	6	6	3.5	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	UCT Open Chess Championship 2025 (Advanced)	2025-10-10	2025-10-12	Standard	Cape Town (WCT)	6	6	3.5	Yes	Analysis
2	Cape Winelands Open 2025 (Advanced)	2025-07-19	2025-07-20	Standard	Cape Winelands (WCW)	6	6	4.5	Yes	Analysis
3	Western Cape Schools Individual Championship 2025 (U15 Boys)	2025-04-26	2025-04-27	Standard	West Coast (WCU)	6	6	4.5	Yes	Analysis
4	CT Metro Schools Individual Closed 2025 (U15 Open)	2025-03-01	2025-03-02	Standard	Cape Town (WCT)	6	6	3.5	Yes	Analysis
5	District South Schools Chess Individual Trials 2025 (U15 Open)	2025-02-01	2025-02-02	Standard	Cape Town (WCT)	6	6	3.5	Yes	Analysis
6	Western Cape Top Schools Championship 2024 (U13 Mixed)	2024-08-30	2024-09-01	Standard	Eden (WEG)	6	3	3	Yes	Analysis
7	2022 Central District Individual Trials (U11)	2022-03-05	2022-03-05	Rapid	Cape Town (WCT)	5	5	2	Yes	Analysis

#	Games	Start				End
1	10	Tournament CT Metro Schools Individual Closed 2025				Tournament Western Cape Schools Individual Championship 2025
		date 2025-03-01	rnd 3	type Standard	result 1	date 2025-04-27	rnd 6	type Standard	result 1
		Opponent Ashworth, DA (Dylan Adrian)				Opponent Winster, K (Kaylum)
2	8	Tournament Cape Winelands Open 2025				Tournament UCT Open Chess Championship 2025
		date 2025-07-19	rnd 2	type Standard	result 1	date 2025-10-11	rnd 3	type Standard	result 0.5
		Opponent Cupido, C (Caylah)				Opponent Matogo, D (Dennis)
3	4	Tournament 2022 Central District Individual Trials				Tournament Western Cape Top Schools Championship 2024
		date 2022-03-05	rnd 5	type Rapid	result 1	date 2024-09-01	rnd 6	type Standard	result 1
		Opponent Jawoodien, I (Irshaad)				Opponent Suriyari, P (Prosper)

#	Games	Start				End
1	10	Tournament CT Metro Schools Individual Closed 2025				Tournament Western Cape Schools Individual Championship 2025
		date 2025-03-01	rnd 3	type Standard	result 1	date 2025-04-27	rnd 6	type Standard	result 1
		Opponent Ashworth, DA (Dylan Adrian)				Opponent Winster, K (Kaylum)
2	5	Tournament Cape Winelands Open 2025				Tournament Cape Winelands Open 2025
		date 2025-07-19	rnd 2	type Standard	result 1	date 2025-07-20	rnd 6	type Standard	result 1
		Opponent Cupido, C (Caylah)				Opponent Marais, J (Jordan)
3	3	Tournament District South Schools Chess Individual Trials 2025				Tournament CT Metro Schools Individual Closed 2025
		date 2025-02-02	rnd 5	type Standard	result 1	date 2025-03-01	rnd 1	type Standard	result 1
		Opponent Kennis, J (Jayden)				Opponent Els, A (Aiden)

#	Games	Start				End
1	1	Tournament 2022 Central District Individual Trials				Tournament 2022 Central District Individual Trials
		date 2022-03-05	rnd 5	type Rapid	result 1	date 2022-03-05	rnd 5	type Rapid	result 1
		Opponent Jawoodien, I (Irshaad)				Opponent Jawoodien, I (Irshaad)
2	1	Tournament 2022 Central District Individual Trials				Tournament 2022 Central District Individual Trials
		date 2022-03-05	rnd 1	type Rapid	result 1	date 2022-03-05	rnd 1	type Rapid	result 1
		Opponent De Vos, R (Raiq)				Opponent De Vos, R (Raiq)

No games found.

#	Games	Start				End

#	Games	Start				End
1	4	Tournament 2022 Central District Individual Trials				Tournament Western Cape Top Schools Championship 2024
		date 2022-03-05	rnd 5	type Rapid	result 1	date 2024-09-01	rnd 6	type Standard	result 1
		Opponent Jawoodien, I (Irshaad)				Opponent Suriyari, P (Prosper)
2	3	Tournament District South Schools Chess Individual Trials 2025				Tournament CT Metro Schools Individual Closed 2025
		date 2025-02-02	rnd 5	type Standard	result 1	date 2025-03-01	rnd 1	type Standard	result 1
		Opponent Kennis, J (Jayden)				Opponent Els, A (Aiden)
3	2	Tournament Cape Winelands Open 2025				Tournament Cape Winelands Open 2025
		date 2025-07-20	rnd 5	type Standard	result 1	date 2025-07-20	rnd 6	type Standard	result 1
		Opponent Groenewald, W (Willem)				Opponent Marais, J (Jordan)

#	Games	Start				End
1	3	Tournament District South Schools Chess Individual Trials 2025				Tournament CT Metro Schools Individual Closed 2025
		date 2025-02-02	rnd 5	type Standard	result 1	date 2025-03-01	rnd 1	type Standard	result 1
		Opponent Kennis, J (Jayden)				Opponent Els, A (Aiden)
2	3	Tournament Western Cape Top Schools Championship 2024				Tournament Western Cape Top Schools Championship 2024
		date 2024-08-30	rnd 4	type Standard	result 1	date 2024-09-01	rnd 6	type Standard	result 1
		Opponent Willemse, S (Schalk)				Opponent Suriyari, P (Prosper)
3	2	Tournament Cape Winelands Open 2025				Tournament Cape Winelands Open 2025
		date 2025-07-20	rnd 5	type Standard	result 1	date 2025-07-20	rnd 6	type Standard	result 1
		Opponent Groenewald, W (Willem)				Opponent Marais, J (Jordan)

#	Games	Start				End
1	1	Tournament 2022 Central District Individual Trials				Tournament 2022 Central District Individual Trials
		date 2022-03-05	rnd 5	type Rapid	result 1	date 2022-03-05	rnd 5	type Rapid	result 1
		Opponent Jawoodien, I (Irshaad)				Opponent Jawoodien, I (Irshaad)
2	1	Tournament 2022 Central District Individual Trials				Tournament 2022 Central District Individual Trials
		date 2022-03-05	rnd 1	type Rapid	result 1	date 2022-03-05	rnd 1	type Rapid	result 1
		Opponent De Vos, R (Raiq)				Opponent De Vos, R (Raiq)

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	Meyer ,M (Matthew)	2	1	0	2	1	0	0	0	0	0	0	0
1	Meyer ,M (Matthew)	2	1612.3	1612.3	2	1584	1612.3	0	0	0	0	0	0
2	Maruma ,KB (Kamogelo)	2	0.5	-212.5	2	0.5	-212.5	0	0	0	0	0	0
2	Maruma ,KB (Kamogelo)	2	1605.3	1392.8	2	1596.8	1392.8	0	0	0	0	0	0
3	Combrink ,C (Christopher)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
3	Combrink ,C (Christopher)	1	1515.9	1515.9	1	1482.8	1515.9	0	0	0	0	0	0
4	Groenewald ,W (Willem)	1	1	425	1	1	425	0	0	0	0	0	0
4	Groenewald ,W (Willem)	1	1546.1	1971.1	1	1541.9	1971.1	0	0	0	0	0	0
5	Semmelink ,K (Krissa)	1	1	425	1	1	425	0	0	0	0	0	0
5	Semmelink ,K (Krissa)	1	1169.8	1594.8	1	1166.2	1594.8	0	0	0	0	0	0
6	Kroutz ,M (Monray)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Kroutz ,M (Monray)	1	1345.2	920.2	1	1305.9	920.2	0	0	0	0	0	0
7	Winster ,K (Kaylum)	1	1	425	1	1	425	0	0	0	0	0	0
7	Winster ,K (Kaylum)	1	1542	1967	1	1562.2	1967	0	0	0	0	0	0
8	Sanderson ,J (Jamie)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
8	Sanderson ,J (Jamie)	1	1440.5	1440.5	1	1408.5	1440.5	0	0	0	0	0	0
9	Dubbeld ,B (Benjamin)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Dubbeld ,B (Benjamin)	1	1439.3	1014.3	1	1491.2	1014.3	0	0	0	0	0	0
10	Lewis ,E (Ethan)	1	1	425	1	1	425	0	0	0	0	0	0
10	Lewis ,E (Ethan)	1	1200	1625	1	1200	1625	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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PLAYER PAGE

Personal

Underwood, A (Alexander)

Ratings

Game statistics

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Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms