PLAYER PAGE

David Charles Mendelsohn

155022650
Johannesburg Metro (GJM)
Personal
Main rating
Rating 1660.3
K-factor 24
Floor 1353.5
Highest 1853.5 (2018-03-01)
Min/Max +/- allowed 65
Rating Change
()
Games 8
Score 4.5
We 4.48
SWe 0.02
Temp +/- 0.4
Penalties 0
Weight perform 1598.2
Final +/- +0.4
New Rating
()
Rating 1660.8
K-factor 24
Floor 1353.5
Highest 1853.5 (2018-03-01)
Min/Max +/- allowed 65.4
Standard rating
Rating 1676.2
K-factor 24
Floor 1353.5
Highest 1853.5 (2018-03-01)
Min/Max +/- allowed 65.4
Rating Change
()
Games 8
Score 4.5
We 4.67
SWe -0.17
Temp +/- -4
Penalties 0
Weight perform 1626.7
Final +/- -4
New Rating
()
Rating 1672.2
K-factor 24
Floor 1353.5
Highest 1853.5 (2018-03-01)
Min/Max +/- allowed 65.4
Rapid rating
Rating 1784.3
K-factor 24
Floor 1353.5
Highest 1853.5 (2018-03-01)
Min/Max +/- allowed 65.4
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 0
Final +/- 0
New Rating
()
Rating 1784.3
K-factor 24
Floor 1353.5
Highest 1853.5 (2018-03-01)
Min/Max +/- allowed 65.4
Blitz rating
Rating 1853.5
K-factor 24
Floor 1353.5
Highest 1853.5 (2019-09-01)
Min/Max +/- allowed 65.4
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 0
Final +/- 0
New Rating
()
Rating 1853.5
K-factor 24
Floor 1353.5
Highest 1853.5 (2019-09-01)
Min/Max +/- allowed 65.4
Rating Graph
Tournaments
# Tournament Type Start End Host Rounds Rating Games Score Perform Rat+/- Details
1 Randburg NY Swiss 2026 Standard 2026-02-10 2026-03-31 Johannesburg Metro (GJM) 8 1660.3 8 4.5 1661.8 0.4 Details
# Tournament Type Start End Host Rounds Rating Games Score Perform Rat+/- Details
1 MCA Summer Heat Classic 2026 (Expert) Standard 2026-03-21 2026-03-21 Johannesburg Metro (GJM) 5 1660.4 4 1 1665.2 -0.1 Details
2 Randburg Chess Club New Year Rapid 2026 Rapid 2026-01-27 2026-02-03 Johannesburg Metro (GJM) 6 1676.1 3 2 1501.2 -5.9 Details
3 MCA Tshwane Welcome 2026 (A) Standard 2026-01-24 2026-01-24 Tshwane (GTP) 5 1676.1 4 1.5 1726 2.1 Details
4 2026 JMC Kick off Tournament (A) Standard 2026-02-01 2026-02-01 Johannesburg Metro (GJM) 5 1676.1 0 0 0 0 Details
5 Chess Power House Dec Rapid 2025 (A) Rapid 2025-12-16 2025-12-16 Johannesburg Metro (GJM) 5 1687.3 5 2 1462.5 -16.2 Details
6 Randburg Winter Swiss 2025 Standard 2025-07-29 2025-09-16 Johannesburg Metro (GJM) 8 1687.3 8 3 1484.5 -35.5 Details
7 Chess Power House Aug Open 2025 (Prestige) Standard 2025-08-16 2025-08-16 Ekurhuleni (GE) 5 1672.9 4 1.5 1839.7 12 Details
8 JMC - Trinity Randpark Ridge 2025 (A) Standard 2025-07-26 2025-07-26 Johannesburg Metro (GJM) 5 1701.3 4 2 1829 9.8 Details
9 Randburg Chess Club Winter Rapid 2025 Rapid 2025-07-15 2025-07-22 Johannesburg Metro (GJM) 6 1701.3 6 1.5 1261.5 -33.6 Details
10 Neil Savage Memorial Randburg Club Champs 2025 Standard 2025-05-06 2025-06-24 Johannesburg Metro (GJM) 8 1692.2 8 4.5 1735.1 7.5 Details
11 CPH May 2025 (A) Standard 2025-05-03 2025-05-03 Johannesburg Metro (GJM) 5 1709.9 4 0.5 1523.2 -14.8 Details
12 Randburg Chess Club New Year Swiss 2025 Standard 2025-02-11 2025-04-01 Johannesburg Metro (GJM) 8 1700.3 7 4.5 1756.2 7.9 Details
13 Chess Power House March Open 2025 (A) Standard 2025-03-22 2025-03-22 Johannesburg Metro (GJM) 5 1674 5 3 1820.7 13.6 Details
14 Gauteng Inter-Region at UJ 2024 (Adult+Senior) Standard 2024-12-07 2024-12-08 Johannesburg Metro (GJM) 5 1669.5 5 3 1709.4 3.8 Details
15 Randburg Summer Swiss 2024 Standard 2024-10-29 2024-11-26 Johannesburg Metro (GJM) 5 1663 5 3 1710.4 5.4 Details
16 Mzansi Summer Rapid 2024 (A) Rapid 2024-10-26 2024-10-26 Johannesburg Metro (GJM) 6 1615.6 5 3 1829 13.8 Details
17 Randburg Spring Swiss 2024 Standard 2024-08-20 2024-10-08 Johannesburg Metro (GJM) 7 1615.6 7 5.5 1769.3 25.7 Details
18 Randburg Chess Club Winter Swiss 2024 Standard 2024-06-11 2024-07-30 Johannesburg Metro (GJM) 7 1618.5 6 3.5 1598.9 -2.4 Details
19 Chess Power House July Open 2024 (A) Standard 2024-07-20 2024-07-20 Johannesburg Metro (GJM) 5 1641.4 5 1 1322.9 -31.7 Details
20 JMC Trinityhouse Randpark Ridge 2024 (A) Standard 2024-07-13 2024-07-13 Johannesburg Metro (GJM) 5 1641.4 5 2 1765.3 12.6 Details
21 Randburg Chess Club Championship 2024 Standard 2024-04-09 2024-05-21 Johannesburg Metro (GJM) 7 1645.9 7 4.5 1626.6 -3.8 Details
22 1st Knights Open Tournament 2024 (A) Standard 2024-03-23 2024-03-23 Johannesburg Metro (GJM) 5 1640 0 0 0 0 Details
23 Randburg Chess Club New Year Swiss 2024 Standard 2024-02-06 2024-02-06 Johannesburg Metro (GJM) 7 1640 7 4 1664.8 4.9 Details
24 Africawide Chess Championship 2023 (Open) Standard 2023-11-03 2023-11-05 Johannesburg Metro (GJM) 7 1621.4 7 4 1581.4 -5.3 Details
25 Randburg Club Championships Swiss 2023 Standard 2023-08-29 2023-10-10 Johannesburg Metro (GJM) 7 1662.2 6 2.5 1403.4 -34 Details
26 Randburg Winter Swiss 2023 Standard 2023-06-13 2023-07-25 Johannesburg Metro (GJM) 7 1643.2 7 5 1746.4 16.1 Details
27 Randburg Autumn Swiss 2023 Standard 2023-04-11 2023-05-23 Johannesburg Metro (GJM) 7 1638.2 5 3 1659.5 4.3 Details
28 Randburg New Year Swiss 2023 Standard 2023-01-31 2023-03-14 Johannesburg Metro (GJM) 7 1623.7 7 5 1744.8 19.5 Details
29 JMC 1 St Peters 2023 (A) Standard 2023-03-18 2023-03-18 Johannesburg Metro (GJM) 5 1623.7 5 2 1538.3 -7.6 Details
30 Randburg Summer Swiss 2022 Standard 2022-10-25 2022-12-06 Johannesburg Metro (GJM) 7 1628.4 6 4 1502.5 -4.1 Details
31 Randburg Club Championships Swiss 2022 Standard 2022-07-19 2022-09-06 Johannesburg Metro (GJM) 7 1621.9 7 5.5 1559.5 5.4 Details
32 Chessheroes Youth Day 2022 (A1) Classical 2022-06-16 2022-06-18 Johannesburg Metro (GJM) 5 1653.6 4 0 1357 -26.4 Details
33 2021 Lubowski Open Tournament (A) Standard 2021-05-01 2021-05-02 Tshwane (GTP) 5 1668.7 5 2.5 1559.3 -12.8 Details
34 Ekurhuleni Chess Kempton Park Open 2020 (A) Standard 2020-11-21 2020-11-21 Ekurhuleni (GE) 5 1691.8 5 1.5 1508.7 -19.3 Details
35 The King`s Cup League 2020 (A) Standard 2020-03-07 2020-03-07 Johannesburg Metro (GJM) 5 1710.2 5 3 1853.7 12.4 Details
36 Randburg Chess Club Autum Swiss 2020 Standard 2020-02-04 2020-03-10 Johannesburg Metro (GJM) 6 1710.2 6 3.5 1509.9 -20.6 Details
37 JNW Club - Trinityhouse Little Falls Open 2020 (A) Standard 2020-03-14 2020-03-14 Johannesburg Metro (GJM) 5 1710.2 5 2.5 1649.3 -7 Details
38 JNW Club - Trinityhouse Randpark Ridge Open 2020 (A) Standard 2020-02-22 2020-02-22 Johannesburg Metro (GJM) 5 1781.3 4 1 1261 -40.3 Details
39 JNW Club - Bryanston Open1 2020 (A) Standard 2020-02-01 2020-02-01 Johannesburg Metro (GJM) 5 1781.3 4 2 1532.3 -19.3 Details
40 The King`s Cup League 2019 (A) Standard 2019-10-19 2019-10-19 Johannesburg Metro (GJM) 5 1761 5 3.5 1926.4 16.9 Details
41 Randburg Chess Club Winter Swiss 2019 Standard 2019-07-30 2019-09-03 Johannesburg Metro (GJM) 6 1776.1 6 4 1723.7 -3.6 Details
42 The King`s Cup League - Stage 2 2019 (A) Standard 2019-09-07 2019-09-07 Johannesburg Metro (GJM) 5 1776.1 5 2 1652.1 -8.6 Details
43 JNW Club - Bryanston Open 2 2019 (A) Standard 2019-05-11 2019-05-11 Johannesburg Metro (GJM) 5 1773.3 5 2.5 1832.4 2.3 Details
44 2018 Gauteng North Open (A) Standard 2018-10-20 2018-10-21 Tshwane (GTP) 5 1792.7 5 3 1631 -16.1 Details
45 JNW Club - Maragon Open 2018 (A) Standard 2018-08-04 2018-08-04 Johannesburg Metro (GJM) 5 1810.2 5 3 1652.2 -14.4 Details
46 SWVG Arnold Classic Rapid & Blitz 2018 (Rapid Prestige) Rapid 2018-05-19 2018-05-20 Tshwane (GTP) 10 1834.9 7 1.5 1541.5 -20.3 Details
47 JNW Club - Linden Open 2018 (A) Standard 2018-04-14 2018-04-14 Johannesburg Metro (GJM) 5 1848 5 2.5 1728.5 -10.8 Details
48 Randburg Club - Summer Swiss 2018 Standard 2018-01-30 2018-03-13 Johannesburg Metro (GJM) 7 1853.5 5 3.5 1750.1 -0.6 Details
49 The Outpost Chess Club Open 2018 (A) Standard 2018-03-16 2018-03-17 Johannesburg Metro (GJM) 6 1853.5 6 3 1819 -4 Details
50 2017 Gauteng Chess League 1St Division (Classic) Classical 2017-11-04 2017-11-25 Tshwane (GTP) 7 1673 7 3 1738 6.8 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 19
Wins 7
Draws 4
Losses 8
White 10
Black 9
White wins 5
Black wins 2
Score 9
Percent 47.4
Dp -22.4
AOR 1673.1
Performance 1650.7
Game statistics (History)
Games 264
Wins 111
Draws 51
Losses 102
White 129
Black 135
White wins 63
Black wins 48
Score 136.5
Percent 51.7
Dp 14.5
AOR 1622.4
Performance 1636.9
Rankings (Main)
National
Overall 680
Gender 637
Age group 68
Gender/Age 68
Provincial
Overall 246
Gender 228
Age group 24
Gender/Age 24
Regional
Overall 90
Gender 81
Age group 8
Gender/Age 8
Rankings (Standard)
National
Overall 572
Gender 535
Age group 59
Gender/Age 59
Provincial
Overall 217
Gender 202
Age group 22
Gender/Age 22
Regional
Overall 76
Gender 68
Age group 7
Gender/Age 7
Rankings (Rapid)
National
Overall 57
Gender 57
Age group 14
Gender/Age 14
Provincial
Overall 19
Gender 19
Age group 6
Gender/Age 6
Regional
Overall 9
Gender 9
Age group 1
Gender/Age 1
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 19
Score 9
Percent 47.4
Aor 1673.1
Dp -22.4
Prat 1650.7
Performance (12 months)
Games 58
Score 24
Percent 41.4
Aor 1672.8
Dp -73.3
Prat 1599.5
Performance (History)
Games 264
Score 136.5
Percent 51.7
Aor 1622.4
Dp 14.5
Prat 1636.9
Top 5 opponents most often played
Type # Opponent Games White Black First tournament Last tournament Details
Overall 1 Metcalfe, AR (Allister Richard) 11 3 8 Randburg Club - Summer Swiss 2018 Randburg Winter Swiss 2025 Details
Overall 2 Kleyn, AE (Andrew Edward) 10 5 5 The Outpost Chess Club Open 2018 (A) Randburg Spring Swiss 2024 Details
Overall 3 Snyckers, FA (Frank Alexander) 7 6 1 Randburg Club - Summer Swiss 2018 Randburg Winter Swiss 2025 Details
Overall 4 Essop, H (Haroon) 6 4 2 Randburg Club Championships Swiss 2022 Randburg Chess Club Winter Rapid 2025 Details
Overall 5 Van Der Berg, P (Pieter) 5 5 0 Randburg Winter Swiss 2023 Randburg Chess Club New Year Swiss 2025 Details
Standard 1 Metcalfe, AR (Allister Richard) 11 3 8 Randburg Club - Summer Swiss 2018 Randburg Winter Swiss 2025 Details
Standard 2 Kleyn, AE (Andrew Edward) 10 5 5 The Outpost Chess Club Open 2018 (A) Randburg Spring Swiss 2024 Details
Standard 3 Snyckers, FA (Frank Alexander) 7 6 1 Randburg Club - Summer Swiss 2018 Randburg Winter Swiss 2025 Details
Standard 4 Sparks, SJW (Stephen) 5 2 3 Randburg Club Championships Swiss 2022 Randburg Winter Swiss 2025 Details
Standard 5 Essop, H (Haroon) 5 4 1 Randburg Club Championships Swiss 2022 Neil Savage Memorial Randburg Club Champs 2025 Details