PLAYER PAGE

Justin Roos

1110099324
Bojanala Platina (NBR)
Personal
Main rating
Rating 1578.2
K-factor 28
Floor 1133.7
Highest 1650.9 (2022-11-01)
Min/Max +/- allowed 87
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 1485
Final +/- 0
New Rating
()
Rating 1578.2
K-factor 28
Floor 1133.7
Highest 1650.9 (2022-11-01)
Min/Max +/- allowed 87.2
Standard rating
Rating 1573
K-factor 28
Floor 1137.9
Highest 1650.3 (2022-11-01)
Min/Max +/- allowed 87.3
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 1490.4
Final +/- 0
New Rating
()
Rating 1573
K-factor 28
Floor 1137.9
Highest 1650.3 (2022-11-01)
Min/Max +/- allowed 87.3
Rapid rating
Rating 1265
K-factor 36
Floor 765
Highest 1265 (2025-09-01)
Min/Max +/- allowed 151.1
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 0
Final +/- 0
New Rating
()
Rating 1265
K-factor 36
Floor 765
Highest 1265 (2025-09-01)
Min/Max +/- allowed 151.1
Blitz rating
Rating 1200
K-factor 36
Floor 700
Highest 1200 (2018-10-01)
Min/Max +/- allowed 165.8
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 0
Final +/- 0
New Rating
()
Rating 1200
K-factor 36
Floor 700
Highest 1200 (2018-10-01)
Min/Max +/- allowed 165.8
Rating Graph
Tournaments
No tournaments found.
# Tournament Type Start End Host Rounds Rating Games Score Perform Rat+/- Details
# Tournament Type Start End Host Rounds Rating Games Score Perform Rat+/- Details
1 Bojanala's Merry ChessMas 2025 (Knights) Standard 2025-11-29 2025-11-29 Bojanala Platina (NBR) 5 1579.4 5 3 1576.4 0 Details
2 Bojanala's Clash Of Schools 2025 (Championship Open) Rapid 2025-08-02 2025-08-02 Bojanala Platina (NBR) 5 1583.5 5 3 1553.6 0 Details
3 Bojanala's Pre-Exam 2025 (Rooks) Standard 2025-05-31 2025-05-31 Bojanala Platina (NBR) 5 1571.1 5 4 1653.3 0 Details
4 Spartan Bishops Championships Warriors 2025 (U16) Standard 2025-05-23 2025-05-25 Frances Baard (NCF) 5 1542.9 5 4 1623.9 0 Details
5 Robday Bergsig Sport Festival 2025 (Juniors) Rapid 2025-05-03 2025-05-03 Bojanala Platina (NBR) 5 1542.9 5 4.5 1693.7 0 Details
6 South African Junior Closed Chess Championships 2025 (U14 Open) Classical 2025-03-31 2025-04-05 Cape Winelands (WCW) 9 1538.4 9 4.5 1549.8 0 Details
7 Bojanala Circuit Championships 1 of 4 2025 (U16) Standard 2025-03-01 2025-03-01 Bojanala Platina (NBR) 5 1549.9 5 2.5 1413.1 0 Details
8 Bojanala Closed Chess Championships 2025 (U14) Classical 2025-01-31 2025-02-02 Bojanala Platina (NBR) 5 1596.6 5 1.5 1319.2 0 Details
9 Mzansi Interprovincial Youth Chess Championships 2024 (U14 Open Premier) Classical 2024-12-16 2024-12-19 Capricorn (LCP) 7 1594.4 7 5 1608 0 Details
10 Bojanala's e4 In The Chapel 2024 (Rooks) Standard 2024-10-26 2024-10-26 Bojanala Platina (NBR) 5 1586.3 5 4 1635.4 0 Details
11 Bojanala's Clash Of Schools 2024 (Championship) Standard 2024-07-20 2024-07-20 Bojanala Platina (NBR) 5 1531.3 5 4 1690.3 0 Details
12 Bojanala Circuit Championship 2 of 4 2024 (U14) Standard 2024-06-15 2024-06-15 Bojanala Platina (NBR) 5 1478.7 5 4 1648.1 0 Details
13 Spartan Bishops Chess Championships 2024 (Knights) Standard 2024-05-04 2024-05-05 Bojanala Platina (NBR) 5 1476.4 5 3.5 1498 0 Details
14 Bojanala's Rating Express 2024 (Bishops) Standard 2024-04-06 2024-04-06 Bojanala Platina (NBR) 5 1454.3 5 4 1608.6 0 Details
15 Bojanala Silwerrand's Rating Implosion 2024 (Bishops) Standard 2024-03-16 2024-03-16 Bojanala Platina (NBR) 5 1464.3 5 4 1516.2 0 Details
16 Schoemies' Kings & Queens 2024 (Rooks) Standard 2024-03-02 2024-03-02 Bojanala Platina (NBR) 5 1464.3 5 2.5 1349.8 0 Details
17 Bojanala Closed Chess Championships Finals 2024 (U14) Classical 2024-02-09 2024-02-11 Bojanala Platina (NBR) 5 1464.6 5 3 1453.4 0 Details
18 Bojanala Closed Chess Championships Stage 1 2024 (U14) Standard 2024-01-27 2024-01-27 Bojanala Platina (NBR) 5 1469.7 5 3 1438.2 0 Details
19 2023 Cross Border Chess Championships Gaborone vs Bojanala Classical 2023-12-14 2023-12-16 Botswana (BOT) 5 1486.8 5 3 1275.8 0 Details
20 Bojanala's Merry ChessMas 2023 (Rooks) Standard 2023-12-09 2023-12-09 Bojanala Platina (NBR) 5 1486.8 5 3 1529.9 0 Details
21 West Rand vs Bojanala Inter-Regional Championships 2023 (U14) Standard 2023-10-14 2023-10-14 West Rand (GWR) 5 1458.7 5 4 1655.3 0 Details
22 Bojanala School League 2023 (Primary School Open) Rapid 2023-08-19 2023-08-19 Bojanala Platina (NBR) 5 1476.7 5 2 1326.7 0 Details
23 Bojanala's FIDE in the Sparkling Waters 2023 (Rooks) Classical 2023-07-28 2023-07-30 Bojanala Platina (NBR) 6 1488.5 6 4 1427 0 Details
24 Bojanala's Post-Exams 2023 (Rooks) Standard 2023-06-24 2023-06-24 Bojanala Platina (NBR) 5 1424.3 5 5 1779.4 0 Details
25 2023 South African Junior Closed Chess Championships (U12 Open) Classical 2023-03-31 2023-04-04 Chess South Africa (CSA) 9 1528.2 9 2 1169.3 0 Details
26 Schoemies Kings & Queens 2023 (Rooks) Standard 2023-03-18 2023-03-18 Bojanala Platina (NBR) 5 1570 5 2 1255.3 0 Details
27 Dr. Kenneth Kaunda Saamtrek 2023 (U14) Standard 2023-02-04 2023-02-04 Dr Kenneth Kaunda (NWP) 5 1549.3 5 5 1706.7 0 Details
28 One For The Ages 2023 (U14) Standard 2023-02-18 2023-02-18 Bojanala Platina (NBR) 5 1549.3 5 4 1551.8 0 Details
29 Harties Wolf Pack 2023 (Rooks) Standard 2023-01-21 2023-01-21 Bojanala Platina (NBR) 5 1587.2 5 2.5 1302.9 0 Details
30 2022 South African Junior Team Chess Championships (U12 Open) Classical 2022-12-04 2022-12-08 4 Knights (4K) 7 1633.7 7 3.5 1425.6 0 Details
31 West Rand vs Bojanala 2022 (U12A) Standard 2022-11-05 2022-11-05 Bojanala Platina (NBR) 6 1593 6 6 1795.7 0 Details
32 Bojanala SAJCC Trials 2022 (U12) Classical 2022-09-23 2022-09-23 Bojanala Platina (NBR) 5 1538 5 5 1684.3 0 Details
33 Bojanala Chess Federation Wildcards 2022 (U12) Standard 2022-08-20 2022-08-20 Bojanala Platina (NBR) 5 1473.7 5 5 1667.9 0 Details
34 Bojanala Chess Federation Clash of Schools 2022 (PS Championship) Standard 2022-07-22 2022-07-22 Bojanala Platina (NBR) 5 1362.9 5 5 1612.7 0 Details
35 2nd One For The Ages 2022 (U12) Standard 2022-07-30 2022-07-30 Bojanala Platina (NBR) 5 1362.9 5 4 1390.3 0 Details
36 One For The Ages 2022 (U12) Standard 2022-07-16 2022-07-16 Bojanala Platina (NBR) 5 1362.9 5 5 1738.6 0 Details
37 RHS Know Thyself 2022 (B) Standard 2022-04-23 2022-04-23 Bojanala Platina (NBR) 5 1398.7 5 2 1125.3 0 Details
38 The Meridian 2022 (U12) Standard 2022-01-22 2022-01-22 Bojanala Platina (NBR) 5 1384.2 5 4 1465.2 0 Details
39 Africa Schools Individual Chess Championship 2021 Classical 2021-12-13 2021-12-19 Kenya (KEN) 9 1468.7 9 5 1084.6 0 Details
40 Bojanala SAJCC Trials - Session 2 of 3 2021 (C) Standard 2021-11-13 2021-11-13 Bojanala Platina (NBR) 5 1499.1 5 3 1323 0 Details
41 Bojanala SAJCC Trials - Session 1 of 3 2021 (D) Standard 2021-11-06 2021-11-06 Bojanala Platina (NBR) 5 1499.1 5 4 1454.6 0 Details
42 NC Open 2021 (C) Standard 2021-10-22 2021-10-23 Frances Baard (NCF) 5 1516 5 3 1399.8 0 Details
43 Spring at The King`s Gate 2021 (C) Standard 2021-09-11 2021-09-11 Bojanala Platina (NBR) 5 1512 4 3 1542.8 0 Details
44 Back to the Board 2021 (U12) Standard 2021-04-17 2021-04-17 Bojanala Platina (NBR) 5 1507.2 5 4 1529.5 0 Details
45 Hoerskool Brits Toernooi 2020 (U10) Standard 2020-03-14 2020-03-14 Bojanala Platina (NBR) 5 1426.3 5 5 1726.8 0 Details
46 Laerskool Proteapark 2020 (B) Standard 2020-02-29 2020-02-29 Bojanala Platina (NBR) 5 1422.6 5 3 1326.4 0 Details
47 Lebone II 2020 (U10) Standard 2020-02-15 2020-02-15 Bojanala Platina (NBR) 5 1422.6 5 5 1711.5 0 Details
48 JNW Club - Bryanston Open1 2020 (E) Standard 2020-02-01 2020-02-01 Johannesburg Metro (GJM) 5 1422.6 5 3 1251.2 0 Details
49 2019 South African Junior Team Championships (U10A) Classical 2020-01-04 2020-01-08 4 Knights (4K) 7 1463.6 7 3 1312.4 0 Details
50 Selly Park 2019 (B) Standard 2019-10-05 2019-10-05 Bojanala Platina (NBR) 5 1379.7 5 2 1140.7 0 Details
Game statistics ( )
Games 0
Wins 0
Draws 0
Losses 0
White 0
Black 0
White wins 0
Black wins 0
Score 0
Percent 0
Dp 0
AOR 0
Performance 0
Game statistics ()
Games 0
Wins 0
Draws 0
Losses 0
White 0
Black 0
White wins 0
Black wins 0
Score 0
Percent 0
Dp 0
AOR 0
Performance 0
Game statistics (History)
Games 400
Wins 253
Draws 21
Losses 126
White 199
Black 201
White wins 132
Black wins 121
Score 263.5
Percent 65.9
Dp 134.9
AOR 1278.3
Performance 1413.2
Rankings (Main)
National
Overall 1107
Gender 1017
Age group 119
Gender/Age 100
Provincial
Overall 84
Gender 76
Age group 8
Gender/Age 7
Regional
Overall 70
Gender 63
Age group 7
Gender/Age 6
Rankings (Standard)
National
Overall 1059
Gender 962
Age group 115
Gender/Age 95
Provincial
Overall 87
Gender 79
Age group 8
Gender/Age 7
Regional
Overall 72
Gender 65
Age group 7
Gender/Age 6
Rankings (Rapid)
National
Overall 2631
Gender 2132
Age group 570
Gender/Age 430
Provincial
Overall 85
Gender 71
Age group 16
Gender/Age 12
Regional
Overall 83
Gender 69
Age group 16
Gender/Age 12
Rankings (Blitz)
National
Overall -1
Gender -1
Age group -1
Gender/Age -1
Provincial
Overall -1
Gender -1
Age group -1
Gender/Age -1
Regional
Overall -1
Gender -1
Age group -1
Gender/Age -1
Performance ( )
Games 0
Score 0
Percent 0
Aor 0
Dp 0
Prat 0
Performance ()
Games 0
Score 0
Percent 0
Aor 0
Dp 0
Prat 0
Performance (12 months)
Games 34
Score 23
Percent 67.6
Aor 1451.5
Dp 150
Prat 1601.5
Performance (History)
Games 400
Score 263.5
Percent 65.9
Aor 1278.3
Dp 134.9
Prat 1413.2
Top 5 opponents most often played
Type # Opponent Games White Black First tournament Last tournament Details
Overall 1 Van Der Berg, KW (Kai Willem) 12 6 6 Hoerskool Brits 2018 (U8) Dr. Kenneth Kaunda Saamtrek 2023 (U14) Details
Overall 2 Nortman, WJ (Wilhelmus Johan) 11 4 7 Laerskool Olienpark 2018 (U8) Schoemies Kings & Queens 2023 (Rooks) Details
Overall 3 Schwim, X (Xander) 9 3 6 Laerskool Rustenburg 2018 (E) Lebone II 2020 (U10) Details
Overall 4 Changara, A (Adiel Tavonga) 9 5 4 The Meridian 2022 (U12) Bojanala's Clash Of Schools 2025 (Championship Open) Details
Overall 5 Grobler, R (Rowan) 9 4 5 Bojanala Chess Federation Wildcards 2022 (U12) Bojanala Circuit Championships 1 of 4 2025 (U16) Details
Standard 1 Van Der Berg, KW (Kai Willem) 12 6 6 Hoerskool Brits 2018 (U8) Dr. Kenneth Kaunda Saamtrek 2023 (U14) Details
Standard 2 Nortman, WJ (Wilhelmus Johan) 11 4 7 Laerskool Olienpark 2018 (U8) Schoemies Kings & Queens 2023 (Rooks) Details
Standard 3 Schwim, X (Xander) 9 3 6 Laerskool Rustenburg 2018 (E) Lebone II 2020 (U10) Details
Standard 4 Grobler, R (Rowan) 8 3 5 Bojanala Chess Federation Wildcards 2022 (U12) Bojanala Circuit Championships 1 of 4 2025 (U16) Details
Standard 5 Terblanche, J (Johann) 8 3 5 Bojanala's FIDE in the Sparkling Waters 2023 (Rooks) Spartan Bishops Championships Warriors 2025 (U16) Details
Rapid 1 Tshetlhe, B (Blessing) 2 0 2 Robday Bergsig Sport Festival 2025 (Juniors) Bojanala's Clash Of Schools 2025 (Championship Open) Details