Chess South Africa Ratings Database

PLAYER PAGE

Personal

Posthumus, T (Tristann)

Chess SA id

1090154889

FIDE id

Date of birth

2009-07-20 (U18)

Gender

Male

Region

Ekurhuleni (GE)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-08-16

Personal details last changed

1900-01-01

Junior GPX Games

25.9

Junior GPX Points

1355.4

Item	Main	Standard	Rapid	Blitz
Rating	1394.2	1401.1	1306.7	1200
Raw rating	1394.2	1401.1	1306.3	1200
Weighted rating	1347.3	1334.6	1306.7	1200
Weighted performance	1366.1	1360	0	0
Floor	894.2	901.1	834.6	700
K-factor	36	32	36	36
Min/Max rating change allowed	125.7	124.5	142.5	165.8
Highest rating	1543.3 2023-05-01	1419 2024-05-01	1627.8 2023-05-01	1200 2018-10-01
Highest raw rating	1394.2 2025-09-30	1401.1 2025-09-30	1334.6 2024-06-01	1200 2024-02-01
Highest weighted rating	1347.3 2025-09-30	1334.6 2025-09-30	1306.3 2025-08-01	1200 2018-10-01
Highest weighted performance	1543.3 2023-05-01	1419 2024-05-01	1627.8 2023-05-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0.1	0
New rating	1394.2	1401.1	1306.8	1200
Analysis
Rating	1394.2	1401.1	1306.7	1200
Raw rating	1394.2	1401.1	1306.3	1200
Weighted rating	1347.3	1334.6	1306.7
Weighted performance	1366.1	1360	0
K-factor	36	32	36	36
Floor	894.2	901.1	834.6	700
Max/Min rating change allowed	125.7	124.5	142.5	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	1394.2	1401.1	1306.3	1200
New weighted rating	1352.5	1342.2	1306.8	1200
New weighted performance	1365.6	1359.6	0	0
Temp new rating	1394.2	1401.1	1306.8	1200
Temp new rating +/-	0	0	0.1	0
Final new rating +/-	0	0	0.1	0
New rating	1394.2	1401.1	1306.8	1200
New K-factor	36	32	36	36
New floor	894.2	901.1	834.6	700

Item	Main	Standard	Rapid
	0	0	0
	23	23	0
	39	24	15
	10	5	5
	0	0	0
	0	0	0
History	72	52	20

Games since
	Main 62	Standard 47		Rapid 15		Blitz 0
Gender	Male
Age group	U18
Region	Ekurhuleni (GE)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	2231		781		118
Male	1832		634		97
U18	356		138		18
U18 Male	306		117		15
Standard
	RSA		Province		Region
Overall	2032		763		102
Male	1664		620		86
U18	340		146		17
U18 Male	293		126		15
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	23	13.5	58.7	73.9	1357.7	1431.6
Standard	23	13.5	58.7	73.9	1357.7	1431.6
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	72	45.5	63.19	112.2	1293.2	1405.3
Standard	52	31.5	60.58	89.9	1308.9	1398.8
Rapid	20	14	70	170	1252.2	1422.2
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1394.2	1401.1	1306.3	1200
2025-09-01	1320.7	1310.4	1306.3	1200
2025-08-01	1387.1	1393.3	1306.3	1200
2025-07-01	1387.1	1393.3	1306.1	1200
2025-06-01	1387.1	1393.3	1305.8	1200
2025-05-01	1332.9	1327.7	1305.4	1200
2025-04-01	1332.9	1327.7	1305	1200
2025-03-01	1332.9	1327.7	1304.2	1200
2025-02-01	1332.9	1327.7	1302.3	1200
2025-01-01	1332.9	1327.7	1287.8	1200
2024-12-01	1332.9	1327.7	1287.8	1200
2024-11-01	1332.9	1327.7	1287.8	1200
2024-10-01	1349.5	1327.7	1334.6	1200
2024-09-01	1358.2	1304.7	1334.6	1200
2024-08-01	1358.2	1304.7	1334.6	1200
2024-07-01	1358.2	1304.7	1334.6	1200
2024-06-01	1358.2	1304.7	1334.6	1200
2024-08-01	1313.7	1275.2	1299	1200
2024-04-01	1284.7	1224.1	1299	1200
2024-03-01	1265	1224.1	1288.6	1200
2024-02-01	1265	1224.1	1288.6	1200
2024-01-01	1265	1224.1	1288.6	1200
2023-12-01	1265	1224.1	1288.6	1200
2023-11-01	1265	1224.1	1288.6	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	East Rand Chess Club Open 2025 (B)	2025-08-09	2025-08-09	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
2	East Rand Chess Club Open 2025 (B)	2025-08-09	2025-08-09	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
3	Ekurhuleni North Schools Teams 2025 (U19 Open)	2025-08-16	2025-08-16	Standard	Ekurhuleni (GE)	5	4	2.5	Yes	Analysis
4	Ekurhuleni North Chess Club Open Tournament 2025 (B)	2025-08-09	2025-08-09	Standard	Ekurhuleni (GE)	5	5	1	Yes	Analysis
5	Benoni High School Cluster 2025 (U19)	2025-05-10	2025-05-10	Standard	Ekurhuleni (GE)	5	4	4	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	East Rand Chess Club Open 2025 (B)	2025-08-09	2025-08-09	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
2	East Rand Chess Club Open 2025 (B)	2025-08-09	2025-08-09	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
3	Ekurhuleni North Schools Teams 2025 (U19 Open)	2025-08-16	2025-08-16	Standard	Ekurhuleni (GE)	5	4	2.5	Yes	Analysis
4	Ekurhuleni North Chess Club Open Tournament 2025 (B)	2025-08-09	2025-08-09	Standard	Ekurhuleni (GE)	5	5	1	Yes	Analysis
5	Benoni High School Cluster 2025 (U19)	2025-05-10	2025-05-10	Standard	Ekurhuleni (GE)	5	4	4	Yes	Analysis
6	Gauteng Top Schools 2024 (U15 Open)	2024-10-05	2024-10-05	Rapid	Ekurhuleni (GE)	5	5	2	Yes	Analysis
7	Ekurhuleni North Chess Club Open Tournament 2024 (B)	2024-08-09	2024-08-09	Standard	Ekurhuleni (GE)	5	5	1	Yes	Analysis
8	Ekurhuleni North Schools Finals - Teams 2024 (U15 Open)	2024-08-03	2024-08-03	Standard	Ekurhuleni (GE)	5	5	5	Yes	Analysis
9	Gauteng Schools Individuals Finals 2024 (U15 Boys)	2024-08-17	2024-08-17	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
10	Ekurhuleni North High School Individuals 2024 (U15 Boys)	2024-05-18	2024-05-18	Standard	Ekurhuleni (GE)	5	4	3	Yes	Analysis
11	Benoni Cluster High Schools Teams 2024 (U15)	2024-05-11	2024-05-11	Rapid	Ekurhuleni (GE)	5	5	4	Yes	Analysis
12	Westwood Open 2024 (A)	2024-04-13	2024-04-13	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
13	Benoni High Schools Cluster Individuals 2024 (U15 Boys)	2024-03-16	2024-03-16	Rapid	Ekurhuleni (GE)	5	5	3	Yes	Analysis
14	Ekurhuleni Chess Spring Tournament 2023 (D)	2023-09-23	2023-09-23	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
15	Benoni Cluster High School League 2023 (U15 Open)	2023-05-06	2023-05-06	Rapid	Ekurhuleni (GE)	5	5	5	Yes	Analysis

#	Games	Start				End
1	8	Tournament Ekurhuleni North High School Individuals 2024				Tournament Ekurhuleni North Chess Club Open Tournament 2024
		date 2024-05-18	rnd 4	type Standard	result 1	date 2024-08-09	rnd 1	type Standard	result 1
		Opponent Ajayi, D (Damilola)				Opponent Chapman, J (James)
2	5	Tournament Benoni High School Cluster 2025				Tournament Ekurhuleni North Chess Club Open Tournament 2025
		date 2025-05-10	rnd 1	type Standard	result 1	date 2025-08-09	rnd 1	type Standard	result 1
		Opponent Nkosi, A (Aphiwe)				Opponent Chapman, J (James)
3	5	Tournament Benoni Cluster High School League 2023				Tournament Benoni Cluster High School League 2023
		date 2023-05-06	rnd 1	type Rapid	result 1	date 2023-05-06	rnd 5	type Rapid	result 1
		Opponent Allers, C (Christine)				Opponent Kleynhans, R (Ruan)

#	Games	Start				End
1	8	Tournament Ekurhuleni North High School Individuals 2024				Tournament Ekurhuleni North Chess Club Open Tournament 2024
		date 2024-05-18	rnd 4	type Standard	result 1	date 2024-08-09	rnd 1	type Standard	result 1
		Opponent Ajayi, D (Damilola)				Opponent Chapman, J (James)
2	6	Tournament Gauteng Schools Individuals Finals 2024				Tournament Ekurhuleni North Chess Club Open Tournament 2025
		date 2024-08-17	rnd 5	type Standard	result 1	date 2025-08-09	rnd 1	type Standard	result 1
		Opponent Atam, J (Joel)				Opponent Chapman, J (James)
3	3	Tournament East Rand Chess Club Open 2025				Tournament Ekurhuleni North Schools Teams 2025
		date 2025-08-09	rnd 5	type Standard	result 0.5	date 2025-08-16	rnd 2	type Standard	result 1
		Opponent Coetzee, G (Gisele)				Opponent Watti, B (Bonginkosi)

#	Games	Start				End
1	7	Tournament Benoni Cluster High School League 2023				Tournament Benoni High Schools Cluster Individuals 2024
		date 2023-05-06	rnd 1	type Rapid	result 1	date 2024-03-16	rnd 2	type Rapid	result 1
		Opponent Allers, C (Christine)				Opponent Myburgh, X (Xuan)
2	4	Tournament Benoni Cluster High Schools Teams 2024				Tournament Gauteng Top Schools 2024
		date 2024-05-11	rnd 3	type Rapid	result 1	date 2024-10-05	rnd 1	type Rapid	result 1
		Opponent Smith, H (Henre)				Opponent Mojola, N (Njabulo)
3	2	Tournament Benoni High Schools Cluster Individuals 2024				Tournament Benoni Cluster High Schools Teams 2024
		date 2024-03-16	rnd 5	type Rapid	result 1	date 2024-05-11	rnd 1	type Rapid	result 1
		Opponent Coetser, W (Wian)				Opponent Koorts, L (Layton)

No games found.

#	Games	Start				End

#	Games	Start				End
1	8	Tournament Ekurhuleni North High School Individuals 2024				Tournament Ekurhuleni North Chess Club Open Tournament 2024
		date 2024-05-18	rnd 4	type Standard	result 1	date 2024-08-09	rnd 1	type Standard	result 1
		Opponent Ajayi, D (Damilola)				Opponent Chapman, J (James)
2	5	Tournament Benoni High School Cluster 2025				Tournament Ekurhuleni North Chess Club Open Tournament 2025
		date 2025-05-10	rnd 1	type Standard	result 1	date 2025-08-09	rnd 1	type Standard	result 1
		Opponent Nkosi, A (Aphiwe)				Opponent Chapman, J (James)
3	5	Tournament Benoni Cluster High School League 2023				Tournament Benoni Cluster High School League 2023
		date 2023-05-06	rnd 1	type Rapid	result 1	date 2023-05-06	rnd 5	type Rapid	result 1
		Opponent Allers, C (Christine)				Opponent Kleynhans, R (Ruan)

#	Games	Start				End
1	8	Tournament Ekurhuleni North High School Individuals 2024				Tournament Ekurhuleni North Chess Club Open Tournament 2024
		date 2024-05-18	rnd 4	type Standard	result 1	date 2024-08-09	rnd 1	type Standard	result 1
		Opponent Ajayi, D (Damilola)				Opponent Chapman, J (James)
2	6	Tournament Gauteng Schools Individuals Finals 2024				Tournament Ekurhuleni North Chess Club Open Tournament 2025
		date 2024-08-17	rnd 5	type Standard	result 1	date 2025-08-09	rnd 1	type Standard	result 1
		Opponent Atam, J (Joel)				Opponent Chapman, J (James)
3	3	Tournament Ekurhuleni Chess Spring Tournament 2023				Tournament Westwood Open 2024
		date 2023-09-23	rnd 5	type Standard	result 1	date 2024-04-13	rnd 2	type Standard	result 1
		Opponent Chen, Y (Yuqi)				Opponent Bothma, J (Jaculene)

#	Games	Start				End
1	7	Tournament Benoni Cluster High School League 2023				Tournament Benoni High Schools Cluster Individuals 2024
		date 2023-05-06	rnd 1	type Rapid	result 1	date 2024-03-16	rnd 2	type Rapid	result 1
		Opponent Allers, C (Christine)				Opponent Myburgh, X (Xuan)
2	4	Tournament Benoni Cluster High Schools Teams 2024				Tournament Gauteng Top Schools 2024
		date 2024-05-11	rnd 3	type Rapid	result 1	date 2024-10-05	rnd 1	type Rapid	result 1
		Opponent Smith, H (Henre)				Opponent Mojola, N (Njabulo)
3	2	Tournament Benoni High Schools Cluster Individuals 2024				Tournament Benoni Cluster High Schools Teams 2024
		date 2024-03-16	rnd 5	type Rapid	result 1	date 2024-05-11	rnd 1	type Rapid	result 1
		Opponent Coetser, W (Wian)				Opponent Koorts, L (Layton)

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	Bothma ,L (Liandri)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
1	Bothma ,L (Liandri)	3	1154.1	1012.4	3	1133.4	1012.4	0	0	0	0	0	0
2	Nengovhela ,M (Manakela)	2	1	0	2	1	0	0	0	0	0	0	0
2	Nengovhela ,M (Manakela)	2	1563.6	1563.6	2	1551.7	1563.6	0	0	0	0	0	0
3	Netshimbupfe ,Y (Yoanda)	2	0	-425	2	0	-425	0	0	0	0	0	0
3	Netshimbupfe ,Y (Yoanda)	2	1234.8	809.8	2	1265.4	809.8	0	0	0	0	0	0
4	Jolly ,K (Kian)	2	0	-425	2	0	-425	0	0	0	0	0	0
4	Jolly ,K (Kian)	2	1274.3	849.3	2	1288.5	849.3	0	0	0	0	0	0
5	Hamilton-Hall ,R (Riley)	2	1	0	2	1	0	0	0	0	0	0	0
5	Hamilton-Hall ,R (Riley)	2	1441.2	1441.2	2	1390.3	1441.2	0	0	0	0	0	0
6	Du Toit ,J (Jaunre)	2	0	-425	2	0	-425	0	0	0	0	0	0
6	Du Toit ,J (Jaunre)	2	1395.3	970.3	2	1398.6	970.3	0	0	0	0	0	0
7	Chapman ,J (James)	2	2	425	2	2	425	0	0	0	0	0	0
7	Chapman ,J (James)	2	1192.2	1617.2	2	1208.3	1617.2	0	0	0	0	0	0
8	Coetzee ,G (Gisele)	2	1	0	2	1	0	0	0	0	0	0	0
8	Coetzee ,G (Gisele)	2	1604.6	1604.6	2	1602.4	1604.6	0	0	0	0	0	0
9	Grootboom ,C (Chante)	2	2	425	2	2	425	0	0	0	0	0	0
9	Grootboom ,C (Chante)	2	1324.9	1749.9	2	1302.2	1749.9	0	0	0	0	0	0
10	Pillay ,Z (Zac)	2	0	-425	2	0	-425	0	0	0	0	0	0
10	Pillay ,Z (Zac)	2	1534.5	1109.5	2	1529	1109.5	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

Posthumus, T (Tristann)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms