Chess South Africa Ratings Database

PLAYER PAGE

Personal

Yao, C (Christ David)

Chess SA id

1090098143

FIDE id

Date of birth

2009-11-19 (U18)

Gender

Male

Region

Mangaung (FMB)

Citizen

RSA

Titles

Chess SA registered

Last active game

2024-04-13

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1380.2	1274.8	1490.2	1200
Raw rating	1380.2	1274.8	1490.2	1200
Weighted rating	1377.9	1273.9	1486.1	1200
Weighted performance	1124.3	0	1184.4	0
Floor	901.4	796.8	990.2	700
K-factor	32	36	32	36
Min/Max rating change allowed	128.3	149.1	109.7	165.8
Highest rating	1477.3 2024-03-01	1296.8 2024-03-01	1506.6 2024-03-01	1200 2018-10-01
Highest raw rating	1401.4 2024-04-01	1296.8 2024-03-01	1490.2 2024-04-01	1200 2024-02-01
Highest weighted rating	1372.4 2025-08-01	1270.3 2025-08-01	1478.6 2025-08-01	1200 2018-10-01
Highest weighted performance	1477.3 2024-03-01	1200 2018-02-01	1506.6 2024-03-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1380.2	1274.8	1490.2	1200
Analysis
Rating	1380.2	1274.8	1490.2	1200
Raw rating	1380.2	1274.8	1490.2	1200
Weighted rating	1377.9	1273.9	1486.1
Weighted performance	1124.3	0	1184.4
K-factor	32	36	32	36
Floor	901.4	796.8	990.2	700
Max/Min rating change allowed	128.3	149.1	109.7	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	1380.2	1274.8	1490.2	1200
New weighted rating	1379	1274.5	1487.7	1200
New weighted performance	1116	0	1175.5	0
Temp new rating	1380.2	1274.8	1490.2	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1380.2	1274.8	1490.2	1200
New K-factor	32	36	32	36
New floor	901.4	796.8	990.2	700

Item	Main	Standard	Rapid
	0	0	0
	0	0	0
	18	9	9
	15	0	15
	0	0	0
	0	0	0
History	42	18	24

Games since
	Main 18	Standard 9		Rapid 9		Blitz 0
Gender	Male
Age group	U18
Region	Mangaung (FMB)
Province	Free State (FS)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 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	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
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	42	33	78.57	242.9	1181	1423.8
Standard	18	12	66.67	141.7	1175.1	1316.8
Rapid	24	21	87.5	318.8	1185.4	1504.1
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1380.2	1274.8	1490.2	1200
2025-09-30	1380.2	1274.8	1490.2	1200
2025-09-01	1380.2	1274.8	1490.2	1200
2025-08-01	1380.2	1274.8	1490.2	1200
2025-07-01	1380.2	1274.8	1490.2	1200
2025-06-01	1380.2	1274.8	1490.2	1200
2025-05-01	1380.2	1274.8	1490.2	1200
2025-04-01	1380.2	1274.8	1490.2	1200
2025-03-01	1380.2	1274.8	1490.2	1200
2025-02-01	1380.2	1274.8	1490.2	1200
2025-01-01	1380.2	1274.8	1490.2	1200
2024-12-01	1380.2	1274.8	1490.2	1200
2024-11-01	1380.2	1274.8	1490.2	1200
2024-10-01	1380.2	1274.8	1490.2	1200
2024-09-01	1380.2	1274.8	1490.2	1200
2024-08-01	1380.2	1274.8	1490.2	1200
2024-07-01	1380.2	1274.8	1490.2	1200
2024-09-01	1380.2	1274.8	1490.2	1200
2024-05-01	1380.2	1274.8	1490.2	1200
2024-04-01	1401.4	1296.8	1490.2	1200
2024-03-01	1337.5	1296.8	1365.8	1200
2024-02-01	1274.5	1194.4	1365.8	1200
2024-01-01	1274.5	1194.4	1365.8	1200
2023-12-01	1274.5	1194.4	1365.8	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	Mangaung Metro Chess 12-13 April 2024 (B)	2024-04-12	2024-04-13	Standard	Mangaung (FMB)	5	4	2	Yes	Analysis
2	Bloemfontein Highschool League 2024 (U15A)	2024-03-08	2024-03-08	Rapid	Mangaung (FMB)	5	4	4	Yes	Analysis
3	Mangaung Metro Chess 9 March 2024 (B)	2024-03-09	2024-03-09	Rapid	Mangaung (FMB)	5	5	5	Yes	Analysis
4	Grey College Team Championship 2024 (B)	2024-02-23	2024-02-24	Standard	Mangaung (FMB)	5	5	5	Yes	Analysis
5	St Andrews 19 August 2023 (C)	2023-08-19	2023-08-19	Rapid	Mangaung (FMB)	5	5	3	Yes	Analysis
6	Bloemfontein League 25 August 2023 (U13+U15)	2023-08-25	2023-08-25	Rapid	Mangaung (FMB)	5	5	4	Yes	Analysis
7	August Primary School Chess Festival 2023 (Grade 6+7 A)	2023-08-04	2023-08-04	Rapid	Mangaung (FMB)	5	5	5	Yes	Analysis
8	Mangaung Metro Chess October 2019 (E)	2019-10-11	2019-10-12	Standard	Mangaung (FMB)	5	5	3.5	Yes	Analysis
9	Mangaung Metro Chess 9 - 10 March 2018 (F)	2018-03-09	2018-03-10	Standard	Mangaung (FMB)	5	4	1.5	Yes	Analysis

#	Games	Start				End
1	15	Tournament Grey College Team Championship 2024				Tournament Mangaung Metro Chess 12-13 April 2024
		date 2024-02-23	rnd 1	type Standard	result 1	date 2024-04-12	rnd 1	type Standard	result 1
		Opponent Boshoff, C (Chene)				Opponent Zhu, E (Eric)
2	11	Tournament Mangaung Metro Chess October 2019				Tournament St Andrews 19 August 2023
		date 2019-10-11	rnd 2	type Standard	result 1	date 2023-08-19	rnd 2	type Rapid	result 1
		Opponent Stefaans, A (Asiphe)				Opponent Rametsi, O (Oarabile)
3	4	Tournament Bloemfontein League 25 August 2023				Tournament Bloemfontein League 25 August 2023
		date 2023-08-25	rnd 1	type Rapid	result 1	date 2023-08-25	rnd 4	type Rapid	result 1
		Opponent Moosa, S (Shiraaz)				Opponent Lemphane, O (Oratile)

#	Games	Start				End
1	10	Tournament Mangaung Metro Chess October 2019				Tournament Mangaung Metro Chess 12-13 April 2024
		date 2019-10-11	rnd 2	type Standard	result 1	date 2024-04-12	rnd 1	type Standard	result 1
		Opponent Stefaans, A (Asiphe)				Opponent Zhu, E (Eric)
2	1	Tournament Mangaung Metro Chess 12-13 April 2024				Tournament Mangaung Metro Chess 12-13 April 2024
		date 2024-04-13	rnd 5	type Standard	result 1	date 2024-04-13	rnd 5	type Standard	result 1
		Opponent Nwafor, N (Nneka)				Opponent Nwafor, N (Nneka)
3	1	Tournament Mangaung Metro Chess 9 - 10 March 2018				Tournament Mangaung Metro Chess 9 - 10 March 2018
		date 2018-03-10	rnd 5	type Standard	result 0.5	date 2018-03-10	rnd 5	type Standard	result 0.5
		Opponent Serfontein, D (Devin)				Opponent Serfontein, D (Devin)

#	Games	Start				End
1	9	Tournament Bloemfontein Highschool League 2024				Tournament Mangaung Metro Chess 9 March 2024
		date 2024-03-08	rnd 2	type Rapid	result 1	date 2024-03-09	rnd 5	type Rapid	result 1
		Opponent Berlyn, T (Tristan)				Opponent Gibbens, G (Gregory)
2	7	Tournament August Primary School Chess Festival 2023				Tournament St Andrews 19 August 2023
		date 2023-08-04	rnd 1	type Rapid	result 1	date 2023-08-19	rnd 2	type Rapid	result 1
		Opponent Maritz, J (Jandre)				Opponent Rametsi, O (Oarabile)
3	4	Tournament Bloemfontein League 25 August 2023				Tournament Bloemfontein League 25 August 2023
		date 2023-08-25	rnd 1	type Rapid	result 1	date 2023-08-25	rnd 4	type Rapid	result 1
		Opponent Moosa, S (Shiraaz)				Opponent Lemphane, O (Oratile)

No games found.

#	Games	Start				End

#	Games	Start				End
1	15	Tournament Grey College Team Championship 2024				Tournament Mangaung Metro Chess 12-13 April 2024
		date 2024-02-23	rnd 1	type Standard	result 1	date 2024-04-12	rnd 1	type Standard	result 1
		Opponent Boshoff, C (Chene)				Opponent Zhu, E (Eric)
2	9	Tournament Mangaung Metro Chess October 2019				Tournament St Andrews 19 August 2023
		date 2019-10-12	rnd 4	type Standard	result 1	date 2023-08-19	rnd 2	type Rapid	result 1
		Opponent Rossouw, D (Dihan)				Opponent Rametsi, O (Oarabile)
3	4	Tournament Bloemfontein League 25 August 2023				Tournament Bloemfontein League 25 August 2023
		date 2023-08-25	rnd 1	type Rapid	result 1	date 2023-08-25	rnd 4	type Rapid	result 1
		Opponent Moosa, S (Shiraaz)				Opponent Lemphane, O (Oratile)

#	Games	Start				End
1	8	Tournament Mangaung Metro Chess October 2019				Tournament Mangaung Metro Chess 12-13 April 2024
		date 2019-10-12	rnd 4	type Standard	result 1	date 2024-04-12	rnd 1	type Standard	result 1
		Opponent Rossouw, D (Dihan)				Opponent Zhu, E (Eric)
2	1	Tournament Mangaung Metro Chess 12-13 April 2024				Tournament Mangaung Metro Chess 12-13 April 2024
		date 2024-04-13	rnd 5	type Standard	result 1	date 2024-04-13	rnd 5	type Standard	result 1
		Opponent Nwafor, N (Nneka)				Opponent Nwafor, N (Nneka)
3	1	Tournament Mangaung Metro Chess October 2019				Tournament Mangaung Metro Chess October 2019
		date 2019-10-11	rnd 2	type Standard	result 1	date 2019-10-11	rnd 2	type Standard	result 1
		Opponent Stefaans, A (Asiphe)				Opponent Stefaans, A (Asiphe)

#	Games	Start				End
1	9	Tournament Bloemfontein Highschool League 2024				Tournament Mangaung Metro Chess 9 March 2024
		date 2024-03-08	rnd 2	type Rapid	result 1	date 2024-03-09	rnd 5	type Rapid	result 1
		Opponent Berlyn, T (Tristan)				Opponent Gibbens, G (Gregory)
2	7	Tournament August Primary School Chess Festival 2023				Tournament St Andrews 19 August 2023
		date 2023-08-04	rnd 1	type Rapid	result 1	date 2023-08-19	rnd 2	type Rapid	result 1
		Opponent Maritz, J (Jandre)				Opponent Rametsi, O (Oarabile)
3	4	Tournament Bloemfontein League 25 August 2023				Tournament Bloemfontein League 25 August 2023
		date 2023-08-25	rnd 1	type Rapid	result 1	date 2023-08-25	rnd 4	type Rapid	result 1
		Opponent Moosa, S (Shiraaz)				Opponent Lemphane, O (Oratile)

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	Aucamp ,T (Tristan)	2	2	425	0	0	0	2	2	425	0	0	0
1	Aucamp ,T (Tristan)	2	1197.1	1622.1	0	0	0	2	1239.4	1622.1	0	0	0
2	Berlin ,T (Tristan)	1	1	425	1	1	425	0	0	0	0	0	0
2	Berlin ,T (Tristan)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
3	Mokgasi ,K (Kananelo)	1	0	-425	1	0	-425	0	0	0	0	0	0
3	Mokgasi ,K (Kananelo)	1	1298.1	873.1	1	1300.4	873.1	0	0	0	0	0	0
4	Thiersen ,N (Noa)	1	1	425	1	1	425	0	0	0	0	0	0
4	Thiersen ,N (Noa)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
5	Serfontein ,D (Devin)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
5	Serfontein ,D (Devin)	1	1200	1200	1	1200	1200	0	0	0	0	0	0
6	De Villiers ,H (Hendrik)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	De Villiers ,H (Hendrik)	1	1200	775	1	1200	775	0	0	0	0	0	0
7	Gouws ,R (Ruan)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Gouws ,R (Ruan)	1	1200	775	1	1200	775	0	0	0	0	0	0
8	Stefaans ,A (Asiphe)	1	1	425	1	1	425	0	0	0	0	0	0
8	Stefaans ,A (Asiphe)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
9	Van Rensburg ,M (Marne)	1	1	425	1	1	425	0	0	0	0	0	0
9	Van Rensburg ,M (Marne)	1	1132.5	1557.5	1	1122.4	1557.5	0	0	0	0	0	0
10	Nwafor ,N (Nneka)	1	1	425	1	1	425	0	0	0	0	0	0
10	Nwafor ,N (Nneka)	1	1152.9	1577.9	1	1200	1577.9	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

Yao, C (Christ David)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms