Player Page

Jonker, MD (Matthew)
Dob: 1987/02/27 (Adult)
Gender: Male
Chess SA id: 187014313
FIDE id:
Region: Johannesburg Metro (GJM)
Citizen: RSA
Title(s): FI
Last active: 2023/09/02 (253 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
Curent Raw rating2020.5
Curent Weighted rating2024.6
Curent Weighted performance1491.3
Current official/published rating (highest between Raw, WR and WP)2024.6
Current floor (min rating allowed)1541.0
Current highest rating achieved2041.0
Current K-factor20
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)±51.5
Current Raw change used (final)0.0
Projected new Raw rating2020.5
Projected new Weighed rating2023.9
Projected new Weighted performance1491.3
Projected new official/published rating (highest between new Raw, new WR and new WP)2023.9
Projected effective change (new Official - current Official)-0.6
Projected new highest rating2041.0
Projected new floor1541.0
Projected new K-facor20
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
Curent Raw rating2041.0
Curent Weighted rating2041.0
Curent Weighted performance0.0
Current official/published rating (highest between Raw, WR and WP)2041.0
Current floor (min rating allowed)1541.0
Current highest rating achieved2041.0
Current K-factor20
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)±50.0
Current Raw change used (final)0.0
Projected new Raw rating2041.0
Projected new Weighed rating2041.0
Projected new Weighted performance
Projected new official/published rating (highest between new Raw, new WR and new WP)2041.0
Projected effective change (new Official - current Official)=0.0
Projected new highest rating2041.0
Projected new floor1541.0
Projected new K-facor20
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
Curent Raw rating2017.4
Curent Weighted rating2021.5
Curent Weighted performance0.0
Current official/published rating (highest between Raw, WR and WP)2021.5
Current floor (min rating allowed)1541.0
Current highest rating achieved2041.0
Current K-factor20
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)±51.7
Current Raw change used (final)0.0
Projected new Raw rating2017.4
Projected new Weighed rating2020.8
Projected new Weighted performance0.0
Projected new official/published rating (highest between new Raw, new WR and new WP)2020.8
Projected effective change (new Official - current Official)-0.7
Projected new highest rating2041.0
Projected new floor1541.0
Projected new K-facor20
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
Curent Raw rating1933.8
Curent Weighted rating1949.0
Curent Weighted performance0.0
Current official/published rating (highest between Raw, WR and WP)1949.0
Current floor (min rating allowed)1541.0
Current highest rating achieved2041.0
Current K-factor20
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)±58.3
Current Raw change used (final)0.0
Projected new Raw rating1933.8
Projected new Weighed rating1946.2
Projected new Weighted performance0.0
Projected new official/published rating (highest between new Raw, new WR and new WP)1946.2
Projected effective change (new Official - current Official)-2.8
Projected new highest rating2041.0
Projected new floor1541.0
Projected new K-facor20
Tournaments
Did not participate this month.
Did not participate this year.
#TournamentStartEndHostTypeTimeWeightRoundsGamesScoreMainTypeAnalysis
5 Mzansi Spring Rapid 2023 2023/09/02 2023/09/02 Johannesburg Metro (GJM) Rapid 15 0.39 7 6 4.0 2023.8 2025.6 Analysis
4 JMC Blitz - Higher Ground 2023 2023/06/17 2023/06/17 Johannesburg Metro (GJM) Blitz 8 0.25 7 7 5.5 2029.6 1953.8 Analysis
3 Mzansi Open Blitz 2023 2023/04/29 2023/04/29 Johannesburg Metro (GJM) Blitz 5 0.18 9 9 5.0 2035.7 2006.4 Analysis
2 CPH Chess Clubs Challenge 2022 (A) 2022/11/12 2022/11/12 Johannesburg Metro (GJM) Rapid 20 0.47 7 6 2.5 2037.1 2041.0 Analysis
1 JMC Blitz Open 8 August 2022 (A) 2022/08/08 2022/08/08 Johannesburg Metro (GJM) Blitz 5 0.18 9 9 6.0 2041.0 2041.0 Analysis
Game History
Colour Games Wins Draws Losses Score % Dp Aor Perform
Main 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
Standard 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
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 37 21 4 12 23.0 62.2 103.4 1733.4 1836.8
White 19 11 3 5 12.5 65.8 134.2 1727.4 1861.6
Black 18 10 1 7 10.5 58.3 70.8 1739.8 1810.6
Standard 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
Rapid All 12 6 1 5 6.5 54.2 35.4 1919.8 1955.2
White 6 3 1 2 3.5 58.3 70.8 1888.0 1958.8
Black 6 3 0 3 3.0 50.0 0.0 1951.6 1951.6
Blitz All 25 15 3 7 16.5 66.0 136.0 1643.9 1779.9
White 13 8 2 3 9.0 69.2 163.5 1653.2 1816.7
Black 12 7 1 4 7.5 62.5 106.3 1633.9 1740.1
Top 20 opponents most often played
#Chess SA idNameGamesScoreWinsDrawsLosses%AorDpPerformView
1 101023373 Mlahleki, V (Vusimuzi) 2 1.0 1 0 1 50.0 2036.4 0.0 2036.4 View list
2 109069449 Boheim, E (Eugene) 1 1.0 1 0 0 100.0 2035.7 425.0 2460.7 View list
3 211085191 Naidoo, K (Kajol) 1 1.0 1 0 0 100.0 2029.6 425.0 2454.6 View list
4 199080988 Mthombeni, S (Sanele) 1 1.0 1 0 0 100.0 2037.1 425.0 2462.1 View list
5 105090611 Mnyasta, T (Tezihano) 1 1.0 1 0 0 100.0 2035.7 425.0 2460.7 View list
6 1090098574 Gounder, A (Arun) 1 1.0 1 0 0 100.0 2023.8 425.0 2448.8 View list
7 110086011 Felix, R (Raphael) 1 1.0 1 0 0 100.0 2035.7 425.0 2460.7 View list
8 1730113414 Deysel, R (Ryno) 1 1.0 1 0 0 100.0 2035.7 425.0 2460.7 View list
9 173004580 Chikwava, R (Ronald) 1 1.0 1 0 0 100.0 2023.8 425.0 2448.8 View list
10 1070107792 Jaitas, K (Kittisak) 1 1.0 1 0 0 100.0 2023.8 425.0 2448.8 View list
11 109086379 Jacobs, CN (Calvin Nicholas) 1 1.0 1 0 0 100.0 2023.8 425.0 2448.8 View list
12 1110098631 Kruger, T (Tobias) 1 1.0 1 0 0 100.0 2029.6 425.0 2454.6 View list
13 1090152468 Kojetin, C (Connor) 1 1.0 1 0 0 100.0 2029.6 425.0 2454.6 View list
14 173032618 Rossouw, AJ (Andries) 1 1.0 1 0 0 100.0 2029.6 425.0 2454.6 View list
15 1850155763 Saad, A (Ali) 1 1.0 1 0 0 100.0 2029.6 425.0 2454.6 View list
16 101015487 Khumalo, KB (Keith) 1 0.5 0 1 0 50.0 2037.1 0.0 2037.1 View list
17 183020215 Maliga, N (Norman) 1 0.5 0 1 0 50.0 2029.6 0.0 2029.6 View list
18 108076196 Potgieter, E (Edward) 1 0.5 0 1 0 50.0 2035.7 0.0 2035.7 View list
19 167036725 Sullivan, J (Jason) 1 0.5 0 1 0 50.0 2035.7 0.0 2035.7 View list
20 192023485 Mnguni, JD (Jakob) 1 0.0 0 0 1 0.0 2035.7 -425.0 1610.7 View list