Surname or Chess SA id..
Chess SA Region AOC

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Geoffrey Mclachlan

1120154747
Sarah Baartman (ESB)
Personal
Main rating
Rating 1602.4
K-factor 28
Floor 1137.5
Highest 1637.5 (2025-09-30)
Min/Max +/- allowed 89
Rating Change
()
Games 18
Score 11
We 10.18
SWe 0.58
Temp +/- 16.4
Penalties 0
Weight perform 1556.2
Final +/- +16.4
New Rating
()
Rating 1618.8
K-factor 28
Floor 1137.5
Highest 1637.5 (2025-09-30)
Min/Max +/- allowed 88.9
Standard rating
Rating 1601.5
K-factor 28
Floor 1139.6
Highest 1639.6 (2025-09-30)
Min/Max +/- allowed 88.6
Rating Change
()
Games 9
Score 5
We 4.46
SWe 0.54
Temp +/- 15
Penalties 0
Weight perform 1581.6
Final +/- +15
New Rating
()
Rating 1616.5
K-factor 28
Floor 1139.6
Highest 1639.6 (2025-09-30)
Min/Max +/- allowed 88.6
Rapid rating
Rating 1282
K-factor 36
Floor 800.5
Highest 1447.7 (2024-06-01)
Min/Max +/- allowed 116.5
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 0
Final +/- 0
New Rating
()
Rating 1282
K-factor 36
Floor 800.5
Highest 1447.7 (2024-06-01)
Min/Max +/- allowed 116.5
Blitz rating
Rating 1200
K-factor 36
Floor 700
Highest 1200 (2018-10-01)
Min/Max +/- allowed 165.8
Rating Change
()
Games 9
Score 6
We 4.26
SWe 1.74
Temp +/- 62.8
Penalties 0
Weight perform 0
Final +/- +62.8
New Rating
()
Rating 1262.8
K-factor 36
Floor 762.8
Highest 1262.8 (2026-04-01)
Min/Max +/- allowed 151.6
Rating Graph
Tournaments
# Tournament Type Start End Host Rounds Rating Games Score Perform Rat+/- Details
1 South African Junior Closed Chess Championship 2026 (U14 Open) Classical 2026-03-28 2026-04-02 Bojanala Platina (NBR) 9 1602.4 9 5 1656.8 14.9 Details
2 South African Junior Closed Chess Championship 2026 (Blitz) Blitz 2026-03-31 2026-03-31 Bojanala Platina (NBR) 9 1602.4 9 6 1632.4 1.5 Details
# Tournament Type Start End Host Rounds Rating Games Score Perform Rat+/- Details
1 Pearson Chess Festival 2026 (B) Standard 2026-02-27 2026-02-28 Nelson Mandela Bay (ENM) 5 1584.9 5 3.5 1486.2 -9 Details
2 SBDCA Trial 4 2026 (U16+U18) Standard 2026-02-14 2026-02-14 Sarah Baartman (ESB) 5 1584.9 4 3 1717.5 10.4 Details
3 SBDCA Trial 3 2026 (U16) Standard 2026-01-31 2026-01-31 Sarah Baartman (ESB) 3 1584.9 3 3 1780.9 7.6 Details
4 SBDCA Trial 1 2026 (U16+U18) Standard 2026-01-17 2026-01-17 Sarah Baartman (ESB) 5 1588.2 4 2.5 1557.5 -2.4 Details
5 2025 Mzansi Individual Championships (U14 Open) Classical 2025-12-17 2025-12-20 Nelson Mandela Bay (ENM) 6 1617.6 6 4 1609.3 -1 Details
6 2025 Mzansi Inter Provincial Team Championships (U14 Open) Standard 2025-12-15 2025-12-17 Nelson Mandela Bay (ENM) 6 1617.6 6 3 1444.5 -20.1 Details
7 Fide in the Bay 2025 (A) Standard 2025-11-29 2025-11-29 Nelson Mandela Bay (ENM) 5 1628.7 5 1.5 1541.3 -8 Details
8 Fide in the Bay 2025 (A) Rapid 2025-10-04 2025-10-04 Nelson Mandela Bay (ENM) 7 1637.6 7 3 1525.2 -6.3 Details
9 EC Closed 2025 (U14 Boys) Standard 2025-09-06 2025-09-07 Nelson Mandela Bay (ENM) 6 1636.7 6 3.5 1640.7 0.6 Details
10 UCC Championship 2025 (B) Standard 2025-07-22 2025-08-19 Nelson Mandela Bay (ENM) 5 1601.7 2 2 1706.5 4.5 Details
11 UCC Mind Over Board 2025 (B) Classical 2025-08-01 2025-08-03 Nelson Mandela Bay (ENM) 5 1601.7 5 5 1780.6 20.6 Details
12 NMBCU Closed 2025 (U14) Standard 2025-06-13 2025-06-14 Nelson Mandela Bay (ENM) 6 1611.6 6 3.5 1549.8 -7.1 Details
13 NMBCU Open 2025 (B) Standard 2025-05-23 2025-05-24 Nelson Mandela Bay (ENM) 6 1526.6 5 3.5 1528.8 -0.3 Details
14 NMBCU Trial 4 2025 (U14) Standard 2025-05-09 2025-05-10 Nelson Mandela Bay (ENM) 6 1526.6 6 4.5 1716.6 22.2 Details
15 UCC Presidential Cup 2025 (B) Standard 2025-04-08 2025-05-06 Nelson Mandela Bay (ENM) 5 1526.6 1 1 1633.3 1.5 Details
16 EC Open 2025 (U8-U14 Boys) Standard 2025-05-02 2025-05-02 Buffalo City (EBC) 7 1526.6 7 6 1724.3 30 Details
17 Karen Ashworth 2025 (A) Standard 2025-04-26 2025-04-26 Nelson Mandela Bay (ENM) 5 1526.6 4 1 1484.6 -3.5 Details
18 NMB 3rd Trials 2025 (U14) Standard 2025-04-11 2025-04-12 Nelson Mandela Bay (ENM) 6 1498.6 6 4.5 1647.2 17.4 Details
19 Rhodes Open 2025 (B) Standard 2025-03-21 2025-03-22 Sarah Baartman (ESB) 7 1559.7 6 3.5 1284.2 -34.7 Details
20 NMB 2nd Trials 2025 (U14) Standard 2025-03-07 2025-03-08 Nelson Mandela Bay (ENM) 6 1559.7 6 4 1528.8 -3.5 Details
21 Pearson High Chess Festival 2025 (C) Standard 2025-02-21 2025-02-22 Nelson Mandela Bay (ENM) 5 1518.6 5 4 1606.1 8 Details
22 NMBCH Trial 1 2025 (U14) Standard 2025-02-14 2025-02-15 Nelson Mandela Bay (ENM) 6 1518.6 6 5 1667.9 17.6 Details
23 SBD Activation Tournament 2025 (Open) Rapid 2025-01-04 2025-01-04 Sarah Baartman (ESB) 5 1533.3 5 3 1401.2 -9.2 Details
24 Mzansi Interprovincial Youth Chess Championships 2024 (U14 Open Championship) Classical 2024-12-16 2024-12-19 Capricorn (LCP) 7 1529.5 7 3.5 1550 2.6 Details
25 NMBCU Club League 2024 (B) Standard 2024-07-28 2024-09-15 Nelson Mandela Bay (ENM) 5 1481 2 2 1672.4 9.2 Details
26 NMBCU Closed 2024 (U14) Standard 2024-09-20 2024-09-21 Nelson Mandela Bay (ENM) 6 1481 6 4 1567.8 10.7 Details
27 2024 UCC Mind Over Board (B) Classical 2024-08-30 2024-09-01 Nelson Mandela Bay (ENM) 5 1481 5 4 1575.5 10.4 Details
28 NMBCU Trial 5 2024 (U14) Standard 2024-08-16 2024-08-17 Nelson Mandela Bay (ENM) 6 1483.8 6 4 1512.9 3.5 Details
29 NMB Open 2024 (B) Standard 2024-08-03 2024-08-04 Nelson Mandela Bay (ENM) 6 1483.8 6 3.5 1430.4 -6.2 Details
30 Karen Ashworth 2024 (B) Standard 2024-07-19 2024-07-20 Nelson Mandela Bay (ENM) 6 1437.9 6 5.5 1626.6 22.5 Details
31 NMBCU Trials 4 2024 (U14) Standard 2024-07-12 2024-07-13 Nelson Mandela Bay (ENM) 6 1437.9 6 4 1556.9 14.3 Details
32 Uitenhage Chess Club Rapid June 2024 Rapid 2024-06-18 2024-07-02 Nelson Mandela Bay (ENM) 6 1437.9 5 2 1309.7 -8.1 Details
33 Willow Academy 2024 (B) Rapid 2024-06-22 2024-06-22 Nelson Mandela Bay (ENM) 6 1415.5 6 4.5 1627.2 14.1 Details
34 NMBCU Trial 3 2024 (U14) Standard 2024-05-10 2024-05-11 Nelson Mandela Bay (ENM) 6 1418.2 6 3.5 1404.2 -1.7 Details
35 NMBCU Trials 2 2024 (U14) Standard 2024-04-12 2024-04-13 Nelson Mandela Bay (ENM) 6 1406.1 6 3.5 1484.4 9.1 Details
36 UCC Blitz Tournamen March 2024 Blitz 2024-03-26 2024-04-02 Nelson Mandela Bay (ENM) 6 1406.1 3 2 1340.9 -1.6 Details
37 UCC Strategic Moves 2024 (B) Standard 2024-03-08 2024-03-09 Nelson Mandela Bay (ENM) 5 1389.1 5 4 1530 13.6 Details
38 Madibaz Chess Tournament 2024 (B) Standard 2024-03-01 2024-03-02 Nelson Mandela Bay (ENM) 5 1389.1 4 2 1231.5 -12.1 Details
39 NMBCU Trials 1 2024 (U14) Standard 2024-02-16 2024-02-16 Nelson Mandela Bay (ENM) 6 1254.6 6 3 1298.1 5 Details
40 Pearson Open Chess Tournament 2024 (C) Standard 2024-02-23 2024-02-24 Nelson Mandela Bay (ENM) 5 1254.6 5 4.5 1616.2 36 Details
41 PECC Club Championship 2023 (Junior) Standard 2023-10-12 2023-11-23 Nelson Mandela Bay (ENM) 6 1214.1 4 2 1342.3 11.3 Details
42 2023 Tshwane North School District CLOSED League Championships (D3) Standard 2023-08-12 2023-08-12 Tshwane (GTP) 5 1183.3 5 3.5 1366 17.1 Details
43 NMBCU Trial 4 2023 (U12) Standard 2023-07-28 2023-07-29 Nelson Mandela Bay (ENM) 6 1161.5 6 3.5 1265.3 12.1 Details
44 2023 Tshwane North School District CLOSED Individual Championships (D3) Standard 2023-05-13 2023-05-13 Tshwane (GTP) 5 1200 5 3 1285 7.6 Details
45 EP Trials 3 2023 (U12) Standard 2023-05-05 2023-05-06 Nelson Mandela Bay (ENM) 6 1200 5 1 908.5 -29 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 34
Wins 21
Draws 4
Losses 9
White 18
Black 16
White wins 11
Black wins 10
Score 23
Percent 67.6
Dp 150
AOR 1481.6
Performance 1631.6
Game statistics (History)
Games 249
Wins 144
Draws 34
Losses 71
White 131
Black 118
White wins 77
Black wins 67
Score 161
Percent 64.7
Dp 124.6
AOR 1394
Performance 1518.6
Rankings (Main)
National
Overall 986
Gender 903
Age group 99
Gender/Age 83
Provincial
Overall 92
Gender 86
Age group 17
Gender/Age 15
Regional
Overall 10
Gender 10
Age group 4
Gender/Age 4
Rankings (Standard)
National
Overall 925
Gender 847
Age group 98
Gender/Age 82
Provincial
Overall 87
Gender 81
Age group 17
Gender/Age 15
Regional
Overall 10
Gender 10
Age group 4
Gender/Age 4
Rankings (Rapid)
National
Overall 2281
Gender 1861
Age group 482
Gender/Age 370
Provincial
Overall 228
Gender 195
Age group 42
Gender/Age 36
Regional
Overall 82
Gender 67
Age group 16
Gender/Age 13
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 9
Score 5
Percent 55.6
Aor 1609.6
Dp 47.2
Prat 1656.8
Performance ()
Games 34
Score 23
Percent 67.6
Aor 1481.6
Dp 150
Prat 1631.6
Performance (12 months)
Games 100
Score 64.5
Percent 64.5
Aor 1489
Dp 123.2
Prat 1612.3
Performance (History)
Games 249
Score 161
Percent 64.7
Aor 1394
Dp 124.6
Prat 1518.6
Top 5 opponents most often played
Type # Opponent Games White Black First tournament Last tournament Details
Overall 1 Step, N (Nicholas) 7 3 4 NMBCH Trial 1 2025 (U14) Fide in the Bay 2025 (A) Details
Overall 2 Arries, J (Jayde) 7 2 5 Willow Academy 2024 (B) Fide in the Bay 2025 (A) Details
Overall 3 Du Toit, H (Hayden) 6 2 4 EP Trials 3 2023 (U12) NMBCU Closed 2025 (U14) Details
Overall 4 Murray, C (Chloe) 5 2 3 NMBCU Trial 4 2023 (U12) Fide in the Bay 2025 (A) Details
Overall 5 Mangala, S (Sibonelo) 5 4 1 UCC Strategic Moves 2024 (B) Fide in the Bay 2025 (A) Details
Standard 1 Du Toit, H (Hayden) 6 2 4 EP Trials 3 2023 (U12) NMBCU Closed 2025 (U14) Details
Standard 2 Step, N (Nicholas) 6 2 4 NMBCH Trial 1 2025 (U14) Fide in the Bay 2025 (A) Details
Standard 3 Arries, J (Jayde) 5 2 3 Karen Ashworth 2024 (B) NMBCU Closed 2025 (U14) Details
Standard 4 Ackerdien, S (Saud) 4 1 3 PECC Club Championship 2023 (Junior) Fide in the Bay 2025 (A) Details
Standard 5 Prinsloo, L (Liam) 4 3 1 Karen Ashworth 2024 (B) UCC Mind Over Board 2025 (B) Details
Rapid 1 Mangala, S (Sibonelo) 2 2 0 Willow Academy 2024 (B) Fide in the Bay 2025 (A) Details
Rapid 2 Arries, J (Jayde) 2 0 2 Willow Academy 2024 (B) Fide in the Bay 2025 (A) Details