Chess South Africa Ratings Database

PLAYER PAGE

Personal

Roos, B (Benjamin)

Chess SA id

1160148677

FIDE id

Date of birth

2016-04-27 (U10)

Gender

Male

Region

Tshwane (GTP)

Citizen

RSA

Titles

Chess SA registered

Yes

Last active game

2025-08-15

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

1333.3

Item	Main	Standard	Rapid	Blitz
Rating	1392	1383	1200	1200
Raw rating	1387.9	1376.8	1200	1200
Weighted rating	1392	1383	1200	1200
Weighted performance	1237.9	1231.8	0	0
Floor	953.5	949.5	700	700
K-factor	32	32	36	36
Min/Max rating change allowed	126.9	128.9	165.8	165.8
Highest rating	1469.4 2024-08-01	1465.4 2024-08-01	1200 2018-10-01	1200 2018-10-01
Highest raw rating	1453.5 2024-09-01	1449.5 2024-09-01	1200 2024-03-01	1200 2024-03-01
Highest weighted rating	1388.9 2025-09-01	1380.8 2025-09-01	1200 2018-10-01	1200 2018-10-01
Highest weighted performance	1469.4 2024-08-01	1465.4 2024-08-01	1200 2024-03-01	1200 2024-03-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	1	0.6	0	0
New rating	1393	1383.6	1200	1200
Analysis
Rating	1392	1383	1200	1200
Raw rating	1387.9	1376.8	1200	1200
Weighted rating	1392	1383	1200
Weighted performance	1237.9	1231.8	0
K-factor	32	32	36	36
Floor	953.5	949.5	700	700
Max/Min rating change allowed	126.9	128.9	165.8	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	1387.9	1376.8	1200	1200
New weighted rating	1393	1383.6	1200	1200
New weighted performance	1230	1223.9	0	0
Temp new rating	1393	1383.6	1200	1200
Temp new rating +/-	1	0.6	0	0
Final new rating +/-	1	0.6	0	0
New rating	1393	1383.6	1200	1200
New K-factor	32	32	36	36
New floor	953.5	949.5	700	700

Item	Main	Standard
	0	0
	10	10
	41	41
	26	26
	0	0
	0	0
History	77	77

Games since
	Main 51	Standard 51		Rapid 0		Blitz 0
Gender	Male
Age group	U10
Region	Tshwane (GTP)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	2275		801		287
Male	1847		639		226
U10	157		69		26
U10 Male	136		64		24
Standard
	RSA		Province		Region
Overall	2285		856		326
Male	1852		689		257
U10	163		78		33
U10 Male	139		71		30
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U10	-1		-1		-1
U10 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U10	-1		-1		-1
U10 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	10	5	50	0	1343.8	1343.8
Standard	10	5	50	0	1343.8	1343.8
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	77	47	61.04	93.8	1264.7	1358.6
Standard	77	47	61.04	93.8	1264.7	1358.6
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1387.9	1376.8	1200	1200
2025-09-30	1387.9	1376.8	1200	1200
2025-09-01	1387.9	1376.8	1200	1200
2025-08-01	1395.5	1384	1200	1200
2025-07-01	1395.5	1384	1200	1200
2025-06-01	1395.5	1384	1200	1200
2025-05-01	1395.5	1384	1200	1200
2025-04-01	1395.5	1384	1200	1200
2025-03-01	1395.5	1384	1200	1200
2025-02-01	1405.4	1394.1	1200	1200
2025-01-01	1405.4	1394.1	1200	1200
2024-12-01	1411.4	1404.7	1200	1200
2024-11-01	1411.4	1404.7	1200	1200
2024-10-01	1411.4	1404.7	1200	1200
2024-09-01	1453.5	1449.5	1200	1200
2024-08-01	1415	1410.6	1200	1200
2024-07-01	1415	1410.6	1200	1200
2024-09-01	1326.9	1329.4	1200	1200
2024-05-01	1326.9	1329.4	1200	1200
2024-04-01	1306.6	1304.9	1200	1200
2024-03-01	1306.6	1304.9	1200	1200
2024-02-01	1306.6	1307.4	1200	1200
2024-01-01	1281.8	1284.4	1200	1200
2023-12-01	1281.8	1284.4	1200	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	2025 Tshwane South School District CLOSED League Championship (U9A)	2025-08-15	2025-08-15	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
2	Constantiapark Open 2025 (U10)	2025-02-15	2025-02-15	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	2025 Tshwane South School District CLOSED League Championship (U9A)	2025-08-15	2025-08-15	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
2	Constantiapark Open 2025 (U10)	2025-02-15	2025-02-15	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
3	Gauteng Inter-Region at UJ 2024 (U10 Open)	2024-12-07	2024-12-08	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
4	2024 Etienne Lewis (U10)	2024-08-30	2024-09-01	Standard	Tshwane (GTP)	7	6	2.5	Yes	Analysis
5	D4 Tshwane South District Schools Teams Chess Tournament 2024 (U9A)	2024-08-03	2024-08-03	Standard	Tshwane (GTP)	5	5	4	Yes	Analysis
6	2024 Elise Steenkamp Open Chess Tournament (Bishops)	2024-06-15	2024-06-15	Standard	Tshwane (GTP)	5	5	4.5	Yes	Analysis
7	2024 KSNG CHess Academy Open Tournament (E)	2024-04-06	2024-04-06	Standard	Tshwane (GTP)	5	5	4	Yes	Analysis
8	2024 Tshwane Chess AHS Open Chess Tournament (E)	2024-02-24	2024-02-24	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
9	2024 Tshwane Chess OPEN Registration Tournament (E)	2024-01-27	2024-01-27	Standard	Tshwane (GTP)	5	5	3.5	Yes	Analysis
10	2024 Gauteng Inter-Region Chess Championship (U8)	2024-01-13	2024-01-14	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
11	Lardies Open Tournament 2023 (F)	2023-10-28	2023-10-28	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
12	2023 Etienne Lewis Closed Tournament (U8)	2023-08-26	2023-08-26	Standard	Tshwane (GTP)	6	6	4	Yes	Analysis
13	2023 Lubowski Open Tournament (F)	2023-06-24	2023-06-24	Standard	Tshwane (GTP)	5	5	2.5	Yes	Analysis
14	Tuks Junior Developmental Chess Tournament 2023 (Green)	2023-03-18	2023-03-18	Standard	Tshwane (GTP)	5	5	4.5	Yes	Analysis
15	2023 Tshwane Chess Open Registration Tournament (F)	2023-01-28	2023-01-28	Standard	Tshwane (GTP)	5	5	1.5	Yes	Analysis

#	Games	Start				End
1	9	Tournament 2024 KSNG CHess Academy Open Tournament				Tournament D4 Tshwane South District Schools Teams Chess Tournament 2024
		date 2024-04-06	rnd 3	type Standard	result 1	date 2024-08-03	rnd 1	type Standard	result 1
		Opponent Haupt, N (Nia)				Opponent Venter, L (Liam)
2	8	Tournament 2023 Tshwane Chess Open Registration Tournament				Tournament 2023 Lubowski Open Tournament
		date 2023-01-28	rnd 5	type Standard	result 1	date 2023-06-24	rnd 2	type Standard	result 0.5
		Opponent Potgieter, M (Milahn)				Opponent Erdogan, D (Demir)
3	5	Tournament 2023 Etienne Lewis Closed Tournament				Tournament Lardies Open Tournament 2023
		date 2023-08-26	rnd 4	type Standard	result 1	date 2023-10-28	rnd 2	type Standard	result 1
		Opponent Rampersadh, M (Micah)				Opponent Grobbelaar, M (Mari)

#	Games	Start				End
1	9	Tournament 2024 KSNG CHess Academy Open Tournament				Tournament D4 Tshwane South District Schools Teams Chess Tournament 2024
		date 2024-04-06	rnd 3	type Standard	result 1	date 2024-08-03	rnd 1	type Standard	result 1
		Opponent Haupt, N (Nia)				Opponent Venter, L (Liam)
2	8	Tournament 2023 Tshwane Chess Open Registration Tournament				Tournament 2023 Lubowski Open Tournament
		date 2023-01-28	rnd 5	type Standard	result 1	date 2023-06-24	rnd 2	type Standard	result 0.5
		Opponent Potgieter, M (Milahn)				Opponent Erdogan, D (Demir)
3	5	Tournament 2023 Etienne Lewis Closed Tournament				Tournament Lardies Open Tournament 2023
		date 2023-08-26	rnd 4	type Standard	result 1	date 2023-10-28	rnd 2	type Standard	result 1
		Opponent Rampersadh, M (Micah)				Opponent Grobbelaar, M (Mari)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	5	Tournament 2024 KSNG CHess Academy Open Tournament				Tournament 2024 Elise Steenkamp Open Chess Tournament
		date 2024-04-06	rnd 3	type Standard	result 1	date 2024-06-15	rnd 2	type Standard	result 1
		Opponent Haupt, N (Nia)				Opponent Van Der Walt, A (Alfred)
2	5	Tournament 2023 Etienne Lewis Closed Tournament				Tournament Lardies Open Tournament 2023
		date 2023-08-26	rnd 4	type Standard	result 1	date 2023-10-28	rnd 2	type Standard	result 1
		Opponent Rampersadh, M (Micah)				Opponent Grobbelaar, M (Mari)
3	5	Tournament Tuks Junior Developmental Chess Tournament 2023				Tournament 2023 Lubowski Open Tournament
		date 2023-03-18	rnd 2	type Standard	result 1	date 2023-06-24	rnd 1	type Standard	result 1
		Opponent Pretorius, D (David)				Opponent Moggee, E (Emily)

#	Games	Start				End
1	5	Tournament 2024 KSNG CHess Academy Open Tournament				Tournament 2024 Elise Steenkamp Open Chess Tournament
		date 2024-04-06	rnd 3	type Standard	result 1	date 2024-06-15	rnd 2	type Standard	result 1
		Opponent Haupt, N (Nia)				Opponent Van Der Walt, A (Alfred)
2	5	Tournament 2023 Etienne Lewis Closed Tournament				Tournament Lardies Open Tournament 2023
		date 2023-08-26	rnd 4	type Standard	result 1	date 2023-10-28	rnd 2	type Standard	result 1
		Opponent Rampersadh, M (Micah)				Opponent Grobbelaar, M (Mari)
3	5	Tournament Tuks Junior Developmental Chess Tournament 2023				Tournament 2023 Lubowski Open Tournament
		date 2023-03-18	rnd 2	type Standard	result 1	date 2023-06-24	rnd 1	type Standard	result 1
		Opponent Pretorius, D (David)				Opponent Moggee, E (Emily)

No games found.

#	Games	Start				End

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	Grobbelaar ,M (Mari)	4	2.5	106.2	4	2.5	106.2	0	0	0	0	0	0
1	Grobbelaar ,M (Mari)	4	1292.6	1398.8	4	1285.3	1398.8	0	0	0	0	0	0
2	Erdogan ,D (Demir)	3	2	141.7	3	2	141.7	0	0	0	0	0	0
2	Erdogan ,D (Demir)	3	1279.9	1421.5	3	1278.6	1421.5	0	0	0	0	0	0
3	Swart ,E (Eben)	3	3	425	3	3	425	0	0	0	0	0	0
3	Swart ,E (Eben)	3	1256.9	1681.9	3	1238.1	1681.9	0	0	0	0	0	0
4	Rocher ,G (Gideon)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
4	Rocher ,G (Gideon)	3	1292.6	1150.9	3	1298.5	1150.9	0	0	0	0	0	0
5	Wiehahn ,L (Luke)	3	0	-425	3	0	-425	0	0	0	0	0	0
5	Wiehahn ,L (Luke)	3	1339.2	914.2	3	1343.6	914.2	0	0	0	0	0	0
6	Zhang ,Y (Yufeng)	2	2	425	2	2	425	0	0	0	0	0	0
6	Zhang ,Y (Yufeng)	2	1246.3	1671.3	2	1239.2	1671.3	0	0	0	0	0	0
7	Janse Van Rensburg ,A (Ava)	2	0	-425	2	0	-425	0	0	0	0	0	0
7	Janse Van Rensburg ,A (Ava)	2	1377.1	952.1	2	1375.6	952.1	0	0	0	0	0	0
8	Anthonissen ,MV (Mikhael Villem)	2	0	-425	2	0	-425	0	0	0	0	0	0
8	Anthonissen ,MV (Mikhael Villem)	2	1577	1152	2	1581.2	1152	0	0	0	0	0	0
9	Smit ,J (Juanru)	2	0	-425	2	0	-425	0	0	0	0	0	0
9	Smit ,J (Juanru)	2	1367.9	942.9	2	1368.6	942.9	0	0	0	0	0	0
10	Roberts ,MH (Marthinus Hendrik)	2	1	0	2	1	0	0	0	0	0	0	0
10	Roberts ,MH (Marthinus Hendrik)	2	1380.3	1380.3	2	1356.4	1380.3	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

Tournaments

Grand Prix

Statistics

Notifications

PLAYER PAGE

Personal

Roos, B (Benjamin)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms