Surname or Chess SA id..
Chess SA Region AOC Mzansi 2026

PLAYER PAGE

Ryder Thomson-Selibowitz

1110134886
Tshwane (GTP)
Personal
Main rating
Rating 1593.6
K-factor 32
Floor 1093.6
Highest 1593.6 (2026-09-01)
Min/Max +/- allowed 95
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 1506.4
Final +/- 0
New Rating
()
Rating 1593.6
K-factor 32
Floor 1093.6
Highest 1593.6 (2026-09-01)
Min/Max +/- allowed 94.6
Standard rating
Rating 1594
K-factor 32
Floor 1094
Highest 1594 (2026-09-01)
Min/Max +/- allowed 94.6
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 1543.9
Final +/- 0
New Rating
()
Rating 1594
K-factor 32
Floor 1094
Highest 1594 (2026-09-01)
Min/Max +/- allowed 94.6
Rapid rating
Rating 1305
K-factor 36
Floor 805
Highest 1305 (2026-09-01)
Min/Max +/- allowed 142.8
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 1284.9
Final +/- 0
New Rating
()
Rating 1305
K-factor 36
Floor 805
Highest 1305 (2026-09-01)
Min/Max +/- allowed 142.8
Blitz rating
Rating 1145.8
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 1145.8
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 2026 D4 Tshwane South Team Finals (U19 Open) Rapid 2026-08-22 2026-08-22 Tshwane (GTP) 5 1593.6 5 4 1528.3 5.9 Details
2 2026 Etienne Lewis (U16) Standard 2026-08-08 2026-08-10 Tshwane (GTP) 7 1593.6 7 4.5 1587.7 5.4 Details
3 2026 Menlo Open (B) Standard 2026-07-25 2026-07-25 Tshwane (GTP) 5 1593.6 5 3.5 1629.9 10.3 Details
4 Wynie Robbertse Chess Tournament 2026 (B) Standard 2026-06-27 2026-06-27 Tshwane (GTP) 5 1565.6 5 1.5 1413.7 -22.7 Details
5 2026 D4 Central Cluster Individuals (U15 Boys) Standard 2026-05-23 2026-05-23 Tshwane (GTP) 5 1565.6 5 5 1764.6 32.6 Details
6 2026 D4 District Individuals (U15 Boys) Standard 2026-05-30 2026-05-30 Tshwane (GTP) 5 1565.6 5 2.5 1549.9 -3.5 Details
7 2026 PBHS Open (B) Standard 2026-04-25 2026-04-25 Tshwane (GTP) 5 1453.9 5 4 1815.5 55.2 Details
8 2026 AHS Chess Tournament (B) Standard 2026-02-28 2026-02-28 Tshwane (GTP) 5 1445.1 5 2 1496 8.8 Details
9 2026 Constantiapark Open Chess Tournament (C) Standard 2026-02-14 2026-02-14 Tshwane (GTP) 5 1442.8 5 3 1483.1 3.2 Details
10 2026 Tshwane Chess Registration Tournament (C2) Standard 2026-01-31 2026-01-31 Tshwane (GTP) 5 1442.8 5 4 1621.1 9.2 Details
11 Pretoria Boys High Annual Closed Chess Championship 2025 Rapid 2025-10-18 2025-10-18 Tshwane (GTP) 5 1449.7 5 3 1353.3 -6.1 Details
12 2025 Gauteng Top Schools Teams (U19) Standard 2025-08-30 2025-08-30 Tshwane (GTP) 5 1449.7 5 2.5 1309.4 -14.3 Details
13 2025 Tshwane South School District CLOSED League Championship (U19A) Standard 2025-08-16 2025-08-16 Tshwane (GTP) 5 1477.8 5 4 1485.3 0.3 Details
14 JMC Closed 2025 (B) Standard 2025-08-09 2025-08-10 Johannesburg Metro (GJM) 5 1477.8 2 0 1018.5 -20.3 Details
15 South African Open 2025 (U16 Open) Classical 2025-07-03 2025-07-05 Johannesburg Metro (GJM) 5 1470.5 5 3 1501.5 4.6 Details
16 CPH May 2025 (B) Standard 2025-05-03 2025-05-03 Johannesburg Metro (GJM) 5 1463.1 5 3.5 1516.5 4.6 Details
17 AHS Open Chess Tournament 2025 (C) Standard 2025-03-01 2025-03-01 Tshwane (GTP) 5 1446.3 5 3.5 1560.6 10.5 Details
18 JMC Kick Off 2025 (B) Standard 2025-02-02 2025-02-02 Johannesburg Metro (GJM) 5 1477.6 4 1.5 1225.2 -19.6 Details
19 Gauteng Inter-Region at UJ 2024 (U14 Open) Standard 2024-12-07 2024-12-08 Johannesburg Metro (GJM) 5 1448.1 5 4 1618.6 18.4 Details
20 Mzansi Summer Rapid 2024 (B) Rapid 2024-10-26 2024-10-26 Johannesburg Metro (GJM) 6 1443.1 6 4 1482 3.1 Details
21 Mzansi Spring Open 2024 (Intermediate) Standard 2024-09-07 2024-09-07 Johannesburg Metro (GJM) 5 1437.3 5 3.5 1482.2 3.7 Details
22 JMC Closed 2024 (C) Standard 2024-08-09 2024-08-11 Johannesburg Metro (GJM) 5 1419.3 5 3.5 1527.5 11.3 Details
23 JNW Rapid - Helpmekaar Kollege 2024 Rapid 2024-07-28 2024-07-28 Johannesburg Metro (GJM) 7 1424.2 7 3 1266.4 -9.9 Details
24 JMC Trinityhouse Randpark Ridge 2024 (C) Standard 2024-07-13 2024-07-13 Johannesburg Metro (GJM) 5 1424.2 5 3 1450.8 3.2 Details
25 JMC NG Weltevreden Church 2024 Rapid 2024-06-29 2024-06-29 Johannesburg Metro (GJM) 7 1424.2 7 4 1486 3.6 Details
26 JMC Trinityhouse Little Falls 2024 (C) Standard 2024-06-02 2024-06-02 Johannesburg Metro (GJM) 5 1422.9 5 3 1423.5 0.8 Details
27 JMC Crawford International Sandton 2024 (C) Standard 2024-05-11 2024-05-11 Johannesburg Metro (GJM) 5 1409.6 5 3.5 1473.5 5.8 Details
28 JMC Helpmekaar Kollege Tournament 2024 (C) Standard 2024-05-04 2024-05-04 Johannesburg Metro (GJM) 5 1409.6 5 3 1442 2.5 Details
29 First Knight Riders Junior Open 2024 (A+B) Standard 2024-04-20 2024-04-20 Johannesburg Metro (GJM) 5 1423.7 5 2 1340.4 -8.8 Details
30 JNW Open - Classic - Crawford 2024 (B) Standard 2024-03-09 2024-03-09 Johannesburg Metro (GJM) 5 1407.8 5 2 1237.1 -15.9 Details
31 JMC Unika School Tournament 2024 (D) Standard 2024-03-02 2024-03-02 Johannesburg Metro (GJM) 5 1407.8 5 5 1678.2 25.9 Details
32 Gear Up Mzansi Rapid 2024 (Junior) Rapid 2024-02-17 2024-02-17 Johannesburg Metro (GJM) 5 1371.2 5 4.5 1623.8 20.1 Details
33 2024 Gauteng Inter-Region Chess Championship (U14C) Standard 2024-01-13 2024-01-14 Tshwane (GTP) 5 1347.7 5 4 1436.3 9.2 Details
34 JMC Kick Off Tournament 2024 (D) Standard 2024-01-28 2024-01-28 Johannesburg Metro (GJM) 5 1347.7 5 3 1393.2 3.8 Details
35 Mzansi Summer Blitz 2023 Blitz 2023-12-09 2023-12-09 Johannesburg Metro (GJM) 7 1340.2 7 3 1473.7 4.2 Details
36 Mzansi Spring Rapid 2023 Rapid 2023-09-02 2023-09-02 Johannesburg Metro (GJM) 7 1340.3 7 2.5 1357.9 0 Details
37 JMC Closed Aug 2023 (U14) Standard 2023-08-04 2023-08-06 Johannesburg Metro (GJM) 6 1278.7 5 1 1156.2 -12.9 Details
38 Chess Power House 2023 (C) Standard 2023-08-19 2023-08-19 Johannesburg Metro (GJM) 5 1278.7 4 3 1543.3 23.3 Details
39 JMC Trinity Little Falls 2023 (D) Standard 2023-07-02 2023-07-02 Johannesburg Metro (GJM) 5 1259.9 5 3.5 1374.2 10.5 Details
40 JNW Open - Trinityhouse Little Falls 2023 (C) Standard 2023-06-24 2023-06-24 Johannesburg Metro (GJM) 5 1258.7 5 2.5 1272.4 0.7 Details
41 Gauteng Open Arnold Classic 2023 (D) Standard 2023-05-20 2023-05-20 Tshwane (GTP) 5 1236.6 5 3.5 1366.5 12.1 Details
42 Mzansi Open Blitz 2023 Blitz 2023-04-29 2023-04-29 Johannesburg Metro (GJM) 9 1240.4 9 2.5 1182.3 -2.1 Details
43 JNW Open - Crawford 2023 (C) Standard 2023-03-04 2023-03-04 Johannesburg Metro (GJM) 5 1202.8 5 3 1318.3 10.6 Details
44 JMC 1 St Peters 2023 (D) Standard 2023-03-18 2023-03-18 Johannesburg Metro (GJM) 5 1202.8 5 3 1301.7 10.3 Details
45 Mzansi Rapid 2023 (Development) Rapid 2023-02-04 2023-02-04 Johannesburg Metro (GJM) 6 1156.6 6 5 1459.5 23.2 Details
46 JMC Helpmekaar 2021 (U12) Rapid 2021-09-06 2021-09-06 Johannesburg Metro (GJM) 5 1200 4 0 816.4 -21.9 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 52
Wins 29
Draws 10
Losses 13
White 25
Black 27
White wins 17
Black wins 12
Score 34
Percent 65.4
Dp 130.8
AOR 1458.2
Performance 1588.9
Game statistics (History)
Games 240
Wins 122
Draws 41
Losses 77
White 123
Black 117
White wins 65
Black wins 57
Score 142.5
Percent 59.4
Dp 79.7
AOR 1356.1
Performance 1435.8
Rankings (Main)
National
Overall 1125
Gender 1029
Age group 117
Gender/Age 100
Provincial
Overall 419
Gender 380
Age group 39
Gender/Age 32
Regional
Overall 163
Gender 150
Age group 16
Gender/Age 14
Rankings (Standard)
National
Overall 1033
Gender 937
Age group 118
Gender/Age 101
Provincial
Overall 406
Gender 368
Age group 40
Gender/Age 33
Regional
Overall 158
Gender 145
Age group 17
Gender/Age 15
Rankings (Rapid)
National
Overall 2055
Gender 1697
Age group 365
Gender/Age 286
Provincial
Overall 444
Gender 363
Age group 78
Gender/Age 56
Regional
Overall 48
Gender 41
Age group 6
Gender/Age 6
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 52
Score 34
Percent 65.4
Aor 1458.2
Dp 130.8
Prat 1588.9
Performance (12 months)
Games 57
Score 37
Percent 64.9
Aor 1441.5
Dp 126.8
Prat 1568.3
Performance (History)
Games 240
Score 142.5
Percent 59.4
Aor 1356.1
Dp 79.7
Prat 1435.8
Top 5 opponents most often played
Type # Opponent Games White Black First tournament Last tournament Details
Overall 1 Jonker, T (Tertius) 3 1 2 AHS Open Chess Tournament 2025 (C) 2026 Menlo Open (B) Details
Overall 2 Williams, J (Joshua) 3 1 2 JMC Kick Off Tournament 2024 (D) JNW Rapid - Helpmekaar Kollege 2024 Details
Overall 3 Thakur, Y (Yuv) 3 2 1 JMC Trinity Little Falls 2023 (D) JMC Trinityhouse Randpark Ridge 2024 (C) Details
Overall 4 Ngwangwa, N (Nonhlanhla) 3 0 3 JMC Trinityhouse Randpark Ridge 2024 (C) Mzansi Spring Open 2024 (Intermediate) Details
Overall 5 Arokiam, E (Ethan) 3 1 2 Mzansi Spring Rapid 2023 JMC Trinityhouse Little Falls 2024 (C) Details
Standard 1 Jonker, T (Tertius) 3 1 2 AHS Open Chess Tournament 2025 (C) 2026 Menlo Open (B) Details
Standard 2 Ngwangwa, N (Nonhlanhla) 3 0 3 JMC Trinityhouse Randpark Ridge 2024 (C) Mzansi Spring Open 2024 (Intermediate) Details
Standard 3 Feuth, A (Alexander) 2 1 1 2026 PBHS Open (B) Wynie Robbertse Chess Tournament 2026 (B) Details
Standard 4 Botha, A (Andrea) 2 1 1 JMC Closed Aug 2023 (U14) JMC Helpmekaar Kollege Tournament 2024 (C) Details
Standard 5 Arokiam, E (Ethan) 2 1 1 JMC Helpmekaar Kollege Tournament 2024 (C) JMC Trinityhouse Little Falls 2024 (C) Details
Rapid 1 Moletsane, O (Oabile) 2 2 0 Gear Up Mzansi Rapid 2024 (Junior) JNW Rapid - Helpmekaar Kollege 2024 Details