Chess South Africa Ratings Database

PLAYER PAGE

Personal

De Boer, A (Andrew)

Chess SA id

1100138317

FIDE id

Date of birth

2010-06-23 (U16)

Gender

Male

Region

West Coast (WCU)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-04-27

Personal details last changed

1900-01-01

Junior GPX Games

13.5

Junior GPX Points

1323.2

Item	Main	Standard	Rapid	Blitz
Rating	1409.1	1345.1	1392.2	1200
Raw rating	1409.1	1345.1	1392.2	1200
Weighted rating	1397	1314.8	1385.3	1200
Weighted performance	1270.9	1214.5	1172.1	0
Floor	909.1	845.1	900.6	700
K-factor	32	36	32	36
Min/Max rating change allowed	123.1	134.9	126.1	165.8
Highest rating	1451.2 2023-10-01	1345.1 2025-05-05	1465 2023-10-01	1200 2018-10-01
Highest raw rating	1409.1 2025-05-05	1345.1 2025-05-05	1400.6 2024-02-01	1200 2024-02-01
Highest weighted rating	1394.7 2025-08-01	1307.8 2025-08-01	1384.2 2025-08-01	1200 2018-10-01
Highest weighted performance	1451.2 2023-10-01	1290.5 2023-09-01	1465 2023-10-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1409.1	1345.1	1392.2	1200
Analysis
Rating	1409.1	1345.1	1392.2	1200
Raw rating	1409.1	1345.1	1392.2	1200
Weighted rating	1397	1314.8	1385.3
Weighted performance	1270.9	1214.5	1172.1
K-factor	32	36	32	36
Floor	909.1	845.1	900.6	700
Max/Min rating change allowed	123.1	134.9	126.1	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	1409.1	1345.1	1392.2	1200
New weighted rating	1398.1	1318	1385.7	1200
New weighted performance	1270.4	1214	1171.6	0
Temp new rating	1409.1	1345.1	1392.2	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1409.1	1345.1	1392.2	1200
New K-factor	32	36	32	36
New floor	909.1	845.1	900.6	700

Item	Main	Standard	Rapid
	0	0	0
	16	11	5
	4	0	4
	26	16	10
	13	6	7
	0	0	0
History	59	33	26

Games since
	Main 25	Standard 11		Rapid 14		Blitz 0
Gender	Male
Age group	U16
Region	West Coast (WCU)
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	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 Male	-1		-1		-1
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	16	10	62.5	106.2	1339.6	1445.8
Standard	11	6	54.55	38.6	1399.4	1438
Rapid	5	4	80	255	1208.1	1463.1
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	59	37	62.71	108.1	1291.1	1399.2
Standard	33	17.5	53.03	25.8	1331.4	1357.2
Rapid	26	19.5	75	212.5	1240	1452.5
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1409.1	1345.1	1392.2	1200
2025-09-01	1409.1	1345.1	1392.2	1200
2025-08-01	1409.1	1345.1	1392.2	1200
2025-07-01	1409.1	1345.1	1392.2	1200
2025-06-01	1409.1	1345.1	1392.2	1200
2025-05-01	1409.1	1345.1	1392.2	1200
2025-04-01	1391	1299.5	1392.2	1200
2025-03-01	1392	1291.1	1392.2	1200
2025-02-01	1383.5	1291.1	1375.7	1200
2025-01-01	1383.5	1291.1	1369.9	1200
2024-12-01	1383.5	1291.1	1369.9	1200
2024-11-01	1383.5	1291.1	1369.9	1200
2024-10-01	1383.5	1291.1	1369.9	1200
2024-09-01	1383.5	1291.1	1369.9	1200
2024-08-01	1383.5	1291.1	1369.9	1200
2024-07-01	1383.5	1291.1	1369.9	1200
2024-06-01	1383.5	1291.1	1369.9	1200
2024-08-01	1400.4	1291.1	1400.6	1200
2024-04-01	1400.4	1291.1	1400.6	1200
2024-03-01	1400.4	1291.1	1400.6	1200
2024-02-01	1400.4	1291.1	1400.6	1200
2024-01-01	1400.4	1291.1	1400.6	1200
2023-12-01	1400.4	1291.1	1400.6	1200
2023-11-01	1400.4	1291.1	1400.6	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	Western Cape Schools Individual Championship 2025 (U15 Boys)	2025-04-26	2025-04-27	Standard	West Coast (WCU)	6	6	3	Yes	Analysis
2	West Coast Schools Chess Prestige 2025 (U15 Boys)	2025-03-08	2025-03-08	Standard	West Coast (WCU)	6	5	3	Yes	Analysis
3	Lower West Coast Prestige 2025 (U15 Boys)	2025-02-22	2025-02-22	Rapid	West Coast (WCU)	5	5	4	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Western Cape Schools Individual Championship 2025 (U15 Boys)	2025-04-26	2025-04-27	Standard	West Coast (WCU)	6	6	3	Yes	Analysis
2	West Coast Schools Chess Prestige 2025 (U15 Boys)	2025-03-08	2025-03-08	Standard	West Coast (WCU)	6	5	3	Yes	Analysis
3	Lower West Coast Prestige 2025 (U15 Boys)	2025-02-22	2025-02-22	Rapid	West Coast (WCU)	5	5	4	Yes	Analysis
4	Lower West Top Schools 2024 (U18)	2024-05-11	2024-05-11	Rapid	West Coast (WCU)	5	4	1.5	Yes	Analysis
5	West Coast Primary Schools Grand Challenge League 2023 (Primary School)	2023-10-21	2023-10-21	Rapid	West Coast (WCU)	5	5	4	Yes	Analysis
6	Western Cape Top Schools 2023 (U13 Mixed)	2023-09-02	2023-09-03	Standard	Cape Winelands (WCW)	6	5	3.5	Yes	Analysis
7	Pedro Booyse Top Schools 2023 (U13)	2023-07-29	2023-07-29	Standard	West Coast (WCU)	5	5	4	Yes	Analysis
8	Western Cape PS Individuals 2023 (U13 Boys)	2023-05-05	2023-05-06	Standard	Cape Town (WCT)	6	6	2	Yes	Analysis
9	Lower West Coast Primary Schools Prestige Championships 2023 (U13 Boys)	2023-03-04	2023-03-04	Rapid	West Coast (WCU)	5	5	5	Yes	Analysis
10	West Coast Schools Chess Grand Challenge 2022 (PS Development)	2022-10-29	2022-10-29	Rapid	West Coast (WCU)	5	5	4	Yes	Analysis
11	Pedro Booyse Top Schools 2022 (U13 Open)	2022-07-23	2022-07-23	Standard	West Coast (WCU)	5	3	1	Yes	Analysis
12	Onder-Weskus Top Skole 2022 (O13 Seuns)	2022-06-04	2022-06-04	Rapid	West Coast (WCU)	5	2	1	Yes	Analysis
13	West Coast Schools Prestige 2022 (U13 Boys)	2022-02-19	2022-02-19	Standard	West Coast (WCU)	6	3	1	Yes	Analysis

#	Games	Start				End
1	10	Tournament West Coast Schools Chess Grand Challenge 2022				Tournament Western Cape PS Individuals 2023
		date 2022-10-29	rnd 2	type Rapid	result 1	date 2023-05-05	rnd 1	type Standard	result 1
		Opponent Louw, E (E-Jay)				Opponent Fourie, L (Loftie)
2	8	Tournament Western Cape Top Schools 2023				Tournament West Coast Primary Schools Grand Challenge League 2023
		date 2023-09-02	rnd 3	type Standard	result 1	date 2023-10-21	rnd 4	type Rapid	result 1
		Opponent Sikhondo, N (Nevilene)				Opponent Noble, A (Andrew)
3	6	Tournament Lower West Coast Prestige 2025				Tournament West Coast Schools Chess Prestige 2025
		date 2025-02-22	rnd 1	type Rapid	result 0.5	date 2025-03-08	rnd 1	type Standard	result 0.5
		Opponent Ali, A (Abdinor)				Opponent Pietersen, D (Delmarco)

#	Games	Start				End
1	5	Tournament Western Cape Top Schools 2023				Tournament West Coast Schools Chess Prestige 2025
		date 2023-09-02	rnd 3	type Standard	result 1	date 2025-03-08	rnd 1	type Standard	result 0.5
		Opponent Sikhondo, N (Nevilene)				Opponent Pietersen, D (Delmarco)
2	4	Tournament West Coast Schools Chess Prestige 2025				Tournament Western Cape Schools Individual Championship 2025
		date 2025-03-08	rnd 4	type Standard	result 1	date 2025-04-26	rnd 1	type Standard	result 1
		Opponent Swarts, T (Taloghan)				Opponent Muller, K (Kieran)
3	2	Tournament Western Cape Schools Individual Championship 2025				Tournament Western Cape Schools Individual Championship 2025
		date 2025-04-27	rnd 5	type Standard	result 0.5	date 2025-04-27	rnd 6	type Standard	result 0.5
		Opponent Swarts, Y (Yardley)				Opponent Booysen, C (Chadlin)

#	Games	Start				End
1	13	Tournament West Coast Schools Chess Grand Challenge 2022				Tournament West Coast Primary Schools Grand Challenge League 2023
		date 2022-10-29	rnd 2	type Rapid	result 1	date 2023-10-21	rnd 4	type Rapid	result 1
		Opponent Louw, E (E-Jay)				Opponent Noble, A (Andrew)
2	5	Tournament Lower West Coast Prestige 2025				Tournament Lower West Coast Prestige 2025
		date 2025-02-22	rnd 1	type Rapid	result 0.5	date 2025-02-22	rnd 5	type Rapid	result 1
		Opponent Ali, A (Abdinor)				Opponent Brand, E (Evan)
3	2	Tournament Lower West Top Schools 2024				Tournament Lower West Top Schools 2024
		date 2024-05-11	rnd 1	type Rapid	result 1	date 2024-05-11	rnd 2	type Rapid	result 0.5
		Opponent Ocks, K (Keano)				Opponent Clemitson, A (Alexander)

No games found.

#	Games	Start				End

#	Games	Start				End
1	10	Tournament West Coast Schools Chess Grand Challenge 2022				Tournament Western Cape PS Individuals 2023
		date 2022-10-29	rnd 2	type Rapid	result 1	date 2023-05-05	rnd 1	type Standard	result 1
		Opponent Louw, E (E-Jay)				Opponent Fourie, L (Loftie)
2	6	Tournament Western Cape Top Schools 2023				Tournament West Coast Primary Schools Grand Challenge League 2023
		date 2023-09-03	rnd 5	type Standard	result 1	date 2023-10-21	rnd 4	type Rapid	result 1
		Opponent Anthony, R (Raqib)				Opponent Noble, A (Andrew)
3	2	Tournament West Coast Schools Chess Prestige 2025				Tournament West Coast Schools Chess Prestige 2025
		date 2025-03-08	rnd 4	type Standard	result 1	date 2025-03-08	rnd 5	type Standard	result 1
		Opponent Swarts, T (Taloghan)				Opponent Adams, T (Tyler)

#	Games	Start				End
1	2	Tournament West Coast Schools Chess Prestige 2025				Tournament West Coast Schools Chess Prestige 2025
		date 2025-03-08	rnd 4	type Standard	result 1	date 2025-03-08	rnd 5	type Standard	result 1
		Opponent Swarts, T (Taloghan)				Opponent Adams, T (Tyler)
2	2	Tournament Western Cape Top Schools 2023				Tournament Western Cape Top Schools 2023
		date 2023-09-03	rnd 5	type Standard	result 1	date 2023-09-03	rnd 6	type Standard	result 1
		Opponent Anthony, R (Raqib)				Opponent Shasha, I (Iyanda)
3	2	Tournament Pedro Booyse Top Schools 2023				Tournament Pedro Booyse Top Schools 2023
		date 2023-07-29	rnd 4	type Standard	result 1	date 2023-07-29	rnd 5	type Standard	result 1
		Opponent Lindeque, C (Carlos)				Opponent Te Water, Q (Quinico)

#	Games	Start				End
1	13	Tournament West Coast Schools Chess Grand Challenge 2022				Tournament West Coast Primary Schools Grand Challenge League 2023
		date 2022-10-29	rnd 2	type Rapid	result 1	date 2023-10-21	rnd 4	type Rapid	result 1
		Opponent Louw, E (E-Jay)				Opponent Noble, A (Andrew)
2	2	Tournament Lower West Coast Prestige 2025				Tournament Lower West Coast Prestige 2025
		date 2025-02-22	rnd 2	type Rapid	result 1	date 2025-02-22	rnd 3	type Rapid	result 1
		Opponent Van Wyk, S (Shuhaid)				Opponent Adams, T (Tyler)
3	1	Tournament Lower West Coast Prestige 2025				Tournament Lower West Coast Prestige 2025
		date 2025-02-22	rnd 5	type Rapid	result 1	date 2025-02-22	rnd 5	type Rapid	result 1
		Opponent Brand, E (Evan)				Opponent Brand, E (Evan)

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	Booysen ,C (Chadlin)	2	1	0	2	1	0	0	0	0	0	0	0
1	Booysen ,C (Chadlin)	2	1448.4	1448.4	2	1379.3	1448.4	0	0	0	0	0	0
2	Sikhondo ,N (Nevileen)	2	1	0	2	1	0	0	0	0	0	0	0
2	Sikhondo ,N (Nevileen)	2	1417.6	1417.6	2	1309.7	1417.6	0	0	0	0	0	0
3	Adams ,T (Tyler)	2	2	425	1	1	425	1	1	425	0	0	0
3	Adams ,T (Tyler)	2	1208.4	1633.4	1	1180.3	1633.4	1	1233.8	1633.4	0	0	0
4	Koopman ,T (Tyler)	2	0	-425	1	0	-425	1	0	-425	0	0	0
4	Koopman ,T (Tyler)	2	1479.1	1054.1	1	1213.2	1054.1	1	1514.9	1054.1	0	0	0
5	Te Water ,Q (Quinico)	1	1	425	1	1	425	0	0	0	0	0	0
5	Te Water ,Q (Quinico)	1	1228.7	1653.7	1	1200	1653.7	0	0	0	0	0	0
6	Opperman ,K (Kelly-Ann)	1	1	425	1	1	425	0	0	0	0	0	0
6	Opperman ,K (Kelly-Ann)	1	1178.5	1603.5	1	1138.8	1603.5	0	0	0	0	0	0
7	Anthony ,R (Raqib)	1	1	425	1	1	425	0	0	0	0	0	0
7	Anthony ,R (Raqib)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
8	Niemand ,M (Matthew)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Niemand ,M (Matthew)	1	1370.8	945.8	1	1270.9	945.8	0	0	0	0	0	0
9	Winster ,K (Kaylum)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Winster ,K (Kaylum)	1	1542	1117	1	1562.2	1117	0	0	0	0	0	0
10	Arendse ,Q (Quinwinne)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	Arendse ,Q (Quinwinne)	1	1309.6	884.6	1	1265.2	884.6	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

De Boer, A (Andrew)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms