Player Page

Mendelsohn, DC (David)
Dob: 1955/10/05 (Adult)
Gender: Male
Chess SA id: 155022650
FIDE id:
Region: Johannesburg Metro (GJM)
Citizen: RSA
Title(s):
Last active: 2024/07/30 (71 days ago)
Ratings
Raw rating=Current rating, Weighted rating (WR)=Weighted average of current/new Raw rating + last 23 published Raw ratings), Weighted performance (WP)=Weighted average of last 5 tournaments
Current Raw rating1615.6
Current Weighted rating1634.3
Current Weighted performance1513.4
Current official/published rating (highest between Raw, WR and WP)1634.3
Current highest rating achieved1879.0
Current floor (min rating allowed)1379.0
Current K-factor24
Games played this month0
Score (S)0.0
Expected score (We)0.00
Difference (S-We)0.00
Current Raw change (no limits, including tournament time weight)0.0
Current min/max change allowed (with limits)±91.7
Current Raw change used (final)0.0
Projected new Raw rating1615.6
Projected new Weighed rating1503.5
Projected new Weighted performance1513.4
Projected new final Raw rating (if new WP > new Raw)1615.6
Projected new highest rating1879.0
Projected new floor1379.0
Projected new K-facor24
Projected new official/published rating (highest between new Raw, new WR and new WP)1615.6
Projected effective change (new Official - current Official)-18.7
Raw rating=Current rating, Weighted rating (WR)=Weighted average of current/new Raw rating + last 23 published Raw ratings), Weighted performance (WP)=Weighted average of last 5 tournaments
Current Raw rating1599.6
Current Weighted rating1623.3
Current Weighted performance1513.4
Current official/published rating (highest between Raw, WR and WP)1623.3
Current highest rating achieved1879.0
Current floor (min rating allowed)1379.0
Current K-factor24
Games played this month0
Score (S)0.0
Expected score (We)0.00
Difference (S-We)0.00
Current Raw change (no limits, including tournament time weight)0.0
Current min/max change allowed (with limits)±93.8
Current Raw change used (final)0.0
Projected new Raw rating1599.6
Projected new Weighed rating1493.1
Projected new Weighted performance1513.4
Projected new final Raw rating (if new WP > new Raw)1599.6
Projected new highest rating1879.0
Projected new floor1379.0
Projected new K-facor24
Projected new official/published rating (highest between new Raw, new WR and new WP)1599.6
Projected effective change (new Official - current Official)-23.7
s
Raw rating=Current rating, Weighted rating (WR)=Weighted average of current/new Raw rating + last 23 published Raw ratings), Weighted performance (WP)=Weighted average of last 5 tournaments
Current Raw rating1810.3
Current Weighted rating1810.1
Current Weighted performance
Current official/published rating (highest between Raw, WR and WP)1810.3
Current highest rating achieved1879.0
Current floor (min rating allowed)1379.0
Current K-factor24
Games played this month0
Score (S)0.0
Expected score (We)0.00
Difference (S-We)0.00
Current Raw change (no limits, including tournament time weight)0.0
Current min/max change allowed (with limits)±69.5
Current Raw change used (final)0.0
Projected new Raw rating1810.3
Projected new Weighed rating1665.3
Projected new Weighted performance103.1
Projected new final Raw rating (if new WP > new Raw)1810.3
Projected new highest rating1879.0
Projected new floor1379.0
Projected new K-facor24
Projected new official/published rating (highest between new Raw, new WR and new WP)1810.3
Projected effective change (new Official - current Official)=0.0
Raw rating=Current rating, Weighted rating (WR)=Weighted average of current/new Raw rating + last 23 published Raw ratings), Weighted performance (WP)=Weighted average of last 5 tournaments
Current Raw rating1853.5
Current Weighted rating1853.5
Current Weighted performance
Current official/published rating (highest between Raw, WR and WP)1853.5
Current highest rating achieved1879.0
Current floor (min rating allowed)1379.0
Current K-factor24
Games played this month0
Score (S)0.0
Expected score (We)0.00
Difference (S-We)0.00
Current Raw change (no limits, including tournament time weight)0.0
Current min/max change allowed (with limits)±65.4
Current Raw change used (final)0.0
Projected new Raw rating1853.5
Projected new Weighed rating1705.2
Projected new Weighted performance
Projected new final Raw rating (if new WP > new Raw)
Projected new highest rating1879.0
Projected new floor1379.0
Projected new K-facor24
Projected new official/published rating (highest between new Raw, new WR and new WP)1853.5
Projected effective change (new Official - current Official)=0.0
Tournaments
Did not participate this month.
#TournamentStartEndHostTypeTimeWeightRnsGmsScrMainTypeAnalysis
6 Chess Power House July Open 2024 (A) 2024/07/20 2024/07/20 Johannesburg Metro (GJM) Standard 60 0.83 5 5 1.0 1641.4 1624.4 Analysis
5 JMC Trinityhouse Randpark Ridge 2024 (A) 2024/07/13 2024/07/13 Johannesburg Metro (GJM) Standard 60 0.83 5 5 2.0 1641.4 1624.4 Analysis
4 Randburg Chess Club Winter Swiss 2024 2024/06/11 2024/07/30 Johannesburg Metro (GJM) Standard 90 0.94 7 6 3.5 1618.5 1598.2 Analysis
3 Randburg Chess Club Championship 2024 2024/04/09 2024/05/21 Johannesburg Metro (GJM) Standard 90 0.94 7 7 4.5 1645.9 1634.0 Analysis
2 1st Knights Open Tournament 2024 (A) 2024/03/23 2024/03/23 Johannesburg Metro (GJM) Standard 60 0.83 5 0 0.0 1640.0 1625.4 Analysis
1 Randburg Chess Club New Year Swiss 2024 2024/02/06 2024/02/06 Johannesburg Metro (GJM) Standard 90 0.94 7 7 4.0 1640.0 1625.4 Analysis
#TournamentStartEndHostTypeTimeWeightRoundsGamesScoreMainTypeAnalysis
32 Chess Power House July Open 2024 (A) 2024/07/20 2024/07/20 Johannesburg Metro (GJM) Standard 60 0.83 5 5 1.0 1641.4 1624.4 Analysis
31 JMC Trinityhouse Randpark Ridge 2024 (A) 2024/07/13 2024/07/13 Johannesburg Metro (GJM) Standard 60 0.83 5 5 2.0 1641.4 1624.4 Analysis
30 Randburg Chess Club Winter Swiss 2024 2024/06/11 2024/07/30 Johannesburg Metro (GJM) Standard 90 0.94 7 6 3.5 1618.5 1598.2 Analysis
29 Randburg Chess Club Championship 2024 2024/04/09 2024/05/21 Johannesburg Metro (GJM) Standard 90 0.94 7 7 4.5 1645.9 1634.0 Analysis
28 1st Knights Open Tournament 2024 (A) 2024/03/23 2024/03/23 Johannesburg Metro (GJM) Standard 60 0.83 5 0 0.0 1640.0 1625.4 Analysis
27 Randburg Chess Club New Year Swiss 2024 2024/02/06 2024/02/06 Johannesburg Metro (GJM) Standard 90 0.94 7 7 4.0 1640.0 1625.4 Analysis
26 Africawide Chess Championship 2023 (Open) 2023/11/03 2023/11/05 Johannesburg Metro (GJM) Standard 90 0.94 7 7 4.0 1621.4 1617.7 Analysis
25 Randburg Club Championships Swiss 2023 2023/08/29 2023/10/10 Johannesburg Metro (GJM) Standard 90 0.94 7 6 2.5 1662.2 1661.1 Analysis
24 Randburg Winter Swiss 2023 2023/06/13 2023/07/25 Johannesburg Metro (GJM) Standard 90 0.94 7 7 5.0 1643.2 1640.5 Analysis
23 Randburg Autumn Swiss 2023 2023/04/11 2023/05/23 Johannesburg Metro (GJM) Standard 90 0.94 7 5 3.0 1638.2 1635.0 Analysis
22 JMC 1 St Peters 2023 (A) 2023/03/18 2023/03/18 Johannesburg Metro (GJM) Standard 60 0.83 5 5 2.0 1623.7 1621.1 Analysis
21 Randburg New Year Swiss 2023 2023/01/31 2023/03/14 Johannesburg Metro (GJM) Standard 90 0.94 7 7 5.0 1623.7 1621.1 Analysis
20 Randburg Summer Swiss 2022 2022/10/25 2022/12/06 Johannesburg Metro (GJM) Standard 90 0.94 7 6 4.0 1628.4 1627.8 Analysis
19 Randburg Club Championships Swiss 2022 2022/07/19 2022/09/06 Johannesburg Metro (GJM) Standard 90 0.94 7 7 5.5 1621.9 1621.1 Analysis
18 Chessheroes Youth Day 2022 (A1) 2022/06/16 2022/06/18 Johannesburg Metro (GJM) Standard 120 1.00 5 4 0.0 1653.6 1653.5 Analysis
17 2021 Lubowski Open Tournament (A) 2021/05/01 2021/05/02 Tshwane (GTP) Standard 90 0.94 5 5 2.5 1668.7 1669.1 Analysis
16 Ekurhuleni Chess Kempton Park Open 2020 (A) 2020/11/21 2020/11/21 Ekurhuleni (GE) Standard 60 0.83 5 5 1.5 1691.8 1697.2 Analysis
15 JNW Club - Trinityhouse Little Falls Open 2020 (A) 2020/03/14 2020/03/14 Johannesburg Metro (GJM) Standard 60 0.83 5 5 2.5 1710.2 1719.3 Analysis
14 The King`s Cup League 2020 (A) 2020/03/07 2020/03/07 Johannesburg Metro (GJM) Standard 60 0.83 5 5 3.0 1710.2 1719.3 Analysis
13 JNW Club - Trinityhouse Randpark Ridge Open 2020 (A) 2020/02/22 2020/02/22 Johannesburg Metro (GJM) Standard 60 0.83 5 4 1.0 1781.3 1790.8 Analysis
12
Game History
Colour Games Wins Draws Losses Score % Dp Aor Perform
Main All 30 13 4 13 15.0 50.0 0.0 1602.5 1602.5
White 15 7 2 6 8.0 53.3 28.3 1579.1 1607.4
Black 15 6 2 7 7.0 46.7 -28.3 1625.8 1597.5
Standard All 30 13 4 13 15.0 50.0 0.0 1602.5 1602.5
White 15 7 2 6 8.0 53.3 28.3 1579.1 1607.4
Black 15 6 2 7 7.0 46.7 -28.3 1625.8 1597.5
Rapid All 0 0 0 0 0.0 0.0 0.0 0.0 0.0
White 0 0 0 0 0.0 0.0 0.0 0.0 0.0
Black 0 0 0 0 0.0 0.0 0.0 0.0 0.0
Blitz All 0 0 0 0 0.0 0.0 0.0 0.0 0.0
White 0 0 0 0 0.0 0.0 0.0 0.0 0.0
Black 0 0 0 0 0.0 0.0 0.0 0.0 0.0
Colour Games Wins Draws Losses Score % Dp Aor Perform
Main All 172 74 33 65 90.5 52.6 22.2 1601.9 1624.1
White 81 40 12 29 46.0 56.8 57.7 1578.4 1636.1
Black 91 34 21 36 44.5 48.9 -9.3 1622.8 1613.5
Standard All 165 73 32 60 89.0 53.9 33.5 1594.1 1627.6
White 78 40 11 27 45.5 58.3 70.8 1578.6 1649.5
Black 87 33 21 33 43.5 50.0 0.0 1608.0 1608.0
Rapid All 7 1 1 5 1.5 21.4 -242.9 1784.4 1541.5
White 3 0 1 2 0.5 16.7 -283.3 1571.1 1287.8
Black 4 1 0 3 1.0 25.0 -212.5 1944.4 1731.9
Blitz All 0 0 0 0 0.0 0.0 0.0 0.0 0.0
White 0 0 0 0 0.0 0.0 0.0 0.0 0.0
Black 0 0 0 0 0.0 0.0 0.0 0.0 0.0
Top 20 opponents most often played
#Chess SA idNameGamesScoreWinsDrawsLosses%AorDpPerformView
1 163015814 Kleyn, AE (Andrew) 9 4.5 2 5 2 50.0 1671.5 0.0 1671.5 View list
2 158022721 Metcalfe, AR (Allister) 8 2.5 2 1 5 31.3 1678.1 -159.4 1518.8 View list
3 170035526 Snyckers, FA (Frank) 5 4.0 4 0 1 80.0 1673.5 255.0 1928.5 View list
4 179057929 Essop, H (Haroon) 4 2.5 2 1 1 62.5 1637.8 106.3 1744.0 View list
5 174009090 Essop, R (Rashied) 4 1.5 1 1 2 37.5 1654.5 -106.3 1548.3 View list
6 1560115964 Van Der Berg, P (Pieter) 4 1.5 1 1 2 37.5 1647.8 -106.3 1541.6 View list
7 104053107 Govender, Y (Yaduvir) 3 2.5 2 1 0 83.3 1817.0 283.3 2100.3 View list
8 181035793 Sparks, SJW (Stephen) 3 2.5 2 1 0 83.3 1630.1 283.3 1913.4 View list
9 102072832 Snyckers, A (Adam) 3 1.0 1 0 2 33.3 1634.8 -141.7 1493.1 View list
10 101050584 Mazibuko, K (Khanya) 3 1.0 0 2 1 33.3 1635.0 -141.7 1493.4 View list
11 159008414 Durow, NL (Neil) 3 0.5 0 1 2 16.7 1710.7 -283.3 1427.4 View list
12 103007373 Dinham, J (James) 3 0.0 0 0 3 0.0 1707.2 -425.0 1282.2 View list
13 1770144450 Boshoff, E (Ernst) 2 2.0 2 0 0 100.0 1625.2 425.0 2050.2 View list
14 1640119080 Goldberg, M (Mark) 2 2.0 2 0 0 100.0 1666.1 425.0 2091.1 View list
15 2120115959 Mungal, Z (Zoey) 2 2.0 2 0 0 100.0 1640.3 425.0 2065.3 View list
16 174027391 Ngakane, D (Dan) 2 2.0 2 0 0 100.0 1829.1 425.0 2254.1 View list
17 100072830 Offer, A (Asabi) 2 2.0 2 0 0 100.0 1711.0 425.0 2136.0 View list
18 203010232 Gardiner, N (Noa) 2 1.5 1 1 0 75.0 1702.5 212.5 1915.0 View list
19 190020515 Mantati, SV (Sebei) 2 1.0 1 0 1 50.0 1707.3 0.0 1707.3 View list
20 202020794 Marais, N (Nina) 2 1.0 1 0 1 50.0 1768.5 0.0 1768.5 View list