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

PLAYER PAGE

Geoffrey Mclachlan

1120154747
Sarah Baartman (ESB)
Personal
Main rating
Rating 1704
K-factor 28
Floor 1207.7
Highest 1707.7 (2026-06-01)
Min/Max +/- allowed 80
Rating Change
()
Games 10
Score 6
We 7.83
SWe -1.16
Temp +/- -32.4
Penalties 0
Weight perform 1485.7
Final +/- -32.4
New Rating
()
Rating 1671.6
K-factor 28
Floor 1207.7
Highest 1707.7 (2026-06-01)
Min/Max +/- allowed 80.4
Standard rating
Rating 1705.2
K-factor 28
Floor 1205.2
Highest 1705.2 (2026-06-01)
Min/Max +/- allowed 80.7
Rating Change
()
Games 6
Score 3.5
We 4.64
SWe -1.14
Temp +/- -32
Penalties 0
Weight perform 1649.5
Final +/- -32
New Rating
()
Rating 1673.2
K-factor 28
Floor 1205.2
Highest 1705.2 (2026-06-01)
Min/Max +/- allowed 80.7
Rapid rating
Rating 1440.3
K-factor 36
Floor 800.5
Highest 1447.7 (2024-06-01)
Min/Max +/- allowed 116.5
Rating Change
()
Games 4
Score 2.5
We 3.09
SWe -0.59
Temp +/- -21.2
Penalties 0
Weight perform 1528.9
Final +/- +88.6
New Rating
()
Rating 1528.9
K-factor 32
Floor 1028.9
Highest 1528.9 (2026-10-01)
Min/Max +/- allowed 103.8
Blitz rating
Rating 1262.8
K-factor 36
Floor 762.8
Highest 1262.8 (2026-04-01)
Min/Max +/- allowed 151.6
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 0
Final +/- 0
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 Eastern Cape Closed Championship 2026 (U16 Open) Standard 2026-09-25 2026-09-26 Sarah Baartman (ESB) 6 1704 6 3.5 1547.4 -25.6 Details
2 Eastern Cape Chess Festival 2026 (Inter-Regionals U16) Rapid 2026-09-25 2026-09-25 Sarah Baartman (ESB) 4 1704 4 2.5 1415.2 -6.9 Details
# Tournament Type Start End Host Rounds Rating Games Score Perform Rat+/- Details
1 Curro Chess Open Rapid 2026 (U16) Rapid 2026-08-29 2026-08-29 Cape Town (WCT) 6 1704 6 5.5 1666.9 7.5 Details
2 SBD Schools Trials 2026 (U15 Boys) Rapid 2026-08-15 2026-08-15 Sarah Baartman (ESB) 6 1704 6 5.5 1742.8 8.5 Details
3 Checkmate in Gqeberha 2026 (A) Rapid 2026-07-11 2026-07-11 Nelson Mandela Bay (ENM) 6 1707.7 5 1 1480.3 -19.7 Details
4 SBDCA Trial 9 2026 (U16) Standard 2026-05-30 2026-05-30 Sarah Baartman (ESB) 5 1618.8 5 4.5 1745.1 16.8 Details
5 Spartans Bishops 2026 (Crowns) Standard 2026-05-01 2026-05-01 Sarah Baartman (ESB) 5 1618.8 4 4 1974.7 24.3 Details
6 Fountains Mall Open 2026 (B) Standard 2026-05-16 2026-05-17 Sarah Baartman (ESB) 7 1618.8 0 0 500 0 Details
7 Makhanda Trial 3 2026 (U16) Standard 2026-04-18 2026-04-18 Sarah Baartman (ESB) 5 1618.8 5 4.5 1713.7 9.6 Details
8 Moja Chess Extravaganza 2026 (U14) Standard 2026-04-25 2026-04-26 Cape Town (WCT) 5 1618.8 5 3.5 1643.3 2.6 Details
9 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
10 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
11 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
12 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
13 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
14 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
15 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
16 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
17 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
18 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
19 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
20 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
21 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
22 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
23 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
24 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
25 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
26 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
27 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
28 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
29 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
30 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
31 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
32 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
33 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
34 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
35 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
36 NMBCU Closed 2024 (U14) Standard 2024-09-20 2024-09-21 Nelson Mandela Bay (ENM) 6 1481 6 4 1567.8 10.7 Details
37 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
38 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
39 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
40 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
41 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
42 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
43 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
44 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
45 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
46 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
47 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
48 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
49 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
50 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
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 80
Wins 51
Draws 13
Losses 16
White 42
Black 38
White wins 27
Black wins 24
Score 57.5
Percent 71.9
Dp 185.9
AOR 1460.2
Performance 1646.1
Game statistics (History)
Games 295
Wins 174
Draws 43
Losses 78
White 155
Black 140
White wins 93
Black wins 81
Score 195.5
Percent 66.3
Dp 138.3
AOR 1401.9
Performance 1540.2
Rankings (Main)
National
Overall 544
Gender 509
Age group 55
Gender/Age 48
Provincial
Overall 51
Gender 48
Age group 11
Gender/Age 10
Regional
Overall 3
Gender 3
Age group 3
Gender/Age 3
Rankings (Standard)
National
Overall 503
Gender 474
Age group 53
Gender/Age 46
Provincial
Overall 39
Gender 36
Age group 8
Gender/Age 7
Regional
Overall 2
Gender 2
Age group 2
Gender/Age 2
Rankings (Rapid)
National
Overall 706
Gender 630
Age group 101
Gender/Age 83
Provincial
Overall 60
Gender 54
Age group 12
Gender/Age 10
Regional
Overall 17
Gender 14
Age group 3
Gender/Age 2
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 80
Score 57.5
Percent 71.9
Aor 1460.2
Dp 185.9
Prat 1646.1
Performance (12 months)
Games 97
Score 66
Percent 68
Aor 1472.6
Dp 153.4
Prat 1626
Performance (History)
Games 295
Score 195.5
Percent 66.3
Aor 1401.9
Dp 138.3
Prat 1540.2
Top 5 opponents most often played
Type # Opponent Games White Black First tournament Last tournament Details
Overall 1 Step, N (Nicholas) 8 4 4 NMBCH Trial 1 2025 (U14) Checkmate in Gqeberha 2026 (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 Ackerdien, S (Saud) 5 1 4 PECC Club Championship 2023 (Junior) Checkmate in Gqeberha 2026 (A) Details
Overall 5 Chipunza, J (Jaden) 5 3 2 NMBCH Trial 1 2025 (U14) South African Junior Closed Chess Championship 2026 (U14 Open) 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 Chipunza, J (Jaden) 5 3 2 NMBCH Trial 1 2025 (U14) South African Junior Closed Chess Championship 2026 (U14 Open) Details
Standard 5 Murray, C (Chloe) 4 1 3 NMBCU Trial 4 2023 (U12) UCC Mind Over Board 2025 (B) Details
Rapid 1 Arries, J (Jayde) 2 0 2 Willow Academy 2024 (B) Fide in the Bay 2025 (A) Details
Rapid 2 Mangala, S (Sibonelo) 2 2 0 Willow Academy 2024 (B) Fide in the Bay 2025 (A) Details
Rapid 3 Step, N (Nicholas) 2 2 0 Fide in the Bay 2025 (A) Checkmate in Gqeberha 2026 (A) Details