Player Page

Chen, J (Jiajun)
Dob: 2014/08/21 (U12)
Gender: Male
Chess SA id: 1140147323
FIDE id:
Region: Johannesburg Matro (GJM)
Citizen: RSA
Title(s):
Last active: 2024/02/17 (281 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 rating1278.7
Current Weighted rating1263.5
Current Weighted performance1122.9
Current official/published rating (highest between Raw, WR and WP)1278.7
Current highest rating achieved1278.7
Current floor (min rating allowed)778.7
Current K-factor36
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)±148.2
Current Raw change used (final)0.0
Projected new Raw rating1278.7
Projected new Weighed rating1163.4
Projected new Weighted performance1122.9
Projected new final Raw rating (if new WP > new Raw)1278.7
Projected new highest rating1278.7
Projected new floor778.7
Projected new K-facor36
Projected new official/published rating (highest between new Raw, new WR and new WP)1278.7
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 rating1242.7
Current Weighted rating1238.3
Current Weighted performance
Current official/published rating (highest between Raw, WR and WP)1242.7
Current highest rating achieved1242.7
Current floor (min rating allowed)742.7
Current K-factor36
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)±156.0
Current Raw change used (final)0.0
Projected new Raw rating1242.7
Projected new Weighed rating1140.0
Projected new Weighted performance971.0
Projected new final Raw rating (if new WP > new Raw)1242.7
Projected new highest rating1242.7
Projected new floor742.7
Projected new K-facor36
Projected new official/published rating (highest between new Raw, new WR and new WP)1242.7
Projected effective change (new Official - current Official)=0.0
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 rating1284.6
Current Weighted rating1268.2
Current Weighted performance
Current official/published rating (highest between Raw, WR and WP)1284.6
Current highest rating achieved1284.6
Current floor (min rating allowed)784.6
Current K-factor36
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)±147.0
Current Raw change used (final)0.0
Projected new Raw rating1284.6
Projected new Weighed rating1167.5
Projected new Weighted performance713.8
Projected new final Raw rating (if new WP > new Raw)1284.6
Projected new highest rating1284.6
Projected new floor784.6
Projected new K-facor36
Projected new official/published rating (highest between new Raw, new WR and new WP)1284.6
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 rating1200.0
Current Weighted rating1200.0
Current Weighted performance
Current official/published rating (highest between Raw, WR and WP)1200.0
Current highest rating achieved1200.0
Current floor (min rating allowed)700.0
Current K-factor36
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)±165.8
Current Raw change used (final)0.0
Projected new Raw rating1200.0
Projected new Weighed rating1104.0
Projected new Weighted performance
Projected new final Raw rating (if new WP > new Raw)
Projected new highest rating1200.0
Projected new floor700.0
Projected new K-facor36
Projected new official/published rating (highest between new Raw, new WR and new WP)1200.0
Projected effective change (new Official - current Official)=0.0
Tournaments
Did not participate this month.
#TournamentStartEndHostTypeTimeWeightRnsGmsScrMainTypeAnalysis
1 Gear Up Mzansi Rapid 2024 (Junior) 2024/02/17 2024/02/17 Johannesburg Metro (GJM) Rapid 35 0.66 5 5 4.0 1247.8 1243.6 Analysis
#TournamentStartEndHostTypeTimeWeightRoundsGamesScoreMainTypeAnalysis
6 Gear Up Mzansi Rapid 2024 (Junior) 2024/02/17 2024/02/17 Johannesburg Metro (GJM) Rapid 35 0.66 5 5 4.0 1247.8 1243.6 Analysis
5 3rd Knight Riders Junior Open 2023 (U10+U12) 2023/07/29 2023/07/29 Johannesburg Metro (GJM) Standard 60 0.83 5 5 3.0 1219.7 1202.0 Analysis
4 GoForChess Junior Chess Championship Grayston 2023 (Juniors) 2023/07/16 2023/07/16 Johannesburg Metro (GJM) Standard 60 0.83 5 5 3.0 1219.7 1202.0 Analysis
3 ThinkChess Tournament 6 May 2023 2023/05/06 2023/05/06 Johannesburg Metro (GJM) Standard 60 0.83 5 5 2.5 1208.6 1182.4 Analysis
2 JNW Open - Crawford 2023 (U10) 2023/03/04 2023/03/04 Johannesburg Metro (GJM) Standard 60 0.83 5 3 1.0 1224.7 1200.0 Analysis
1 Chess Power House Rapid 2022 (U8) 2022/10/22 2022/10/22 Johannesburg Metro (GJM) Rapid 30 0.60 5 5 3.5 1200.0 1200.0 Analysis
Game History
Colour Games Wins Draws Losses Score % Dp Aor Perform
Main All 5 4 0 1 4.0 80.0 255.0 1219.5 1474.5
White 3 2 0 1 2.0 66.7 141.7 1215.5 1357.1
Black 2 2 0 0 2.0 100.0 425.0 1225.7 1650.7
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 5 4 0 1 4.0 80.0 255.0 1219.5 1474.5
White 3 2 0 1 2.0 66.7 141.7 1215.5 1357.1
Black 2 2 0 0 2.0 100.0 425.0 1225.7 1650.7
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 28 16 2 10 17.0 60.7 91.1 1227.4 1318.5
White 16 9 1 6 9.5 59.4 79.7 1240.1 1319.8
Black 12 7 1 4 7.5 62.5 106.3 1210.5 1316.7
Standard All 18 9 1 8 9.5 52.8 23.6 1237.4 1261.0
White 11 7 0 4 7.0 63.6 115.9 1251.2 1367.1
Black 7 2 1 4 2.5 35.7 -121.4 1215.7 1094.3
Rapid All 10 7 1 2 7.5 75.0 212.5 1209.4 1421.9
White 5 2 1 2 2.5 50.0 0.0 1215.7 1215.7
Black 5 5 0 0 5.0 100.0 425.0 1203.1 1628.1
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 2140135684 Dlamini, A (Asanda) 1 1.0 1 0 0 100.0 1219.7 425.0 1644.7 View list
2 1150158556 Collard, L (Liam) 1 1.0 1 0 0 100.0 1219.7 425.0 1644.7 View list
3 2140107212 Chauke, N (Nokukhanya) 1 1.0 1 0 0 100.0 1219.7 425.0 1644.7 View list
4 1130192101 Hattingh, A (Andre) 1 1.0 1 0 0 100.0 1247.8 425.0 1672.8 View list
5 1110133417 Govender, C (Cadin) 1 1.0 1 0 0 100.0 1247.8 425.0 1672.8 View list
6 2120149119 Gokool, N (Nishka) 1 1.0 1 0 0 100.0 1247.8 425.0 1672.8 View list
7 1140138299 Mannar, A (Aaryan) 1 1.0 1 0 0 100.0 1219.7 425.0 1644.7 View list
8 1150146689 Linnell, H (Hannah) 1 1.0 1 0 0 100.0 1200.0 425.0 1625.0 View list
9 1120148615 Upadhyay, S (Savya) 1 1.0 1 0 0 100.0 1208.6 425.0 1633.6 View list
10 1170147325 Stelloh, A (Alexander) 1 1.0 1 0 0 100.0 1200.0 425.0 1625.0 View list
11 1140151826 Saaiman, N (Nicolaas) 1 1.0 1 0 0 100.0 1224.7 425.0 1649.7 View list
12 1150147324 Robinson, Z (Zachariah) 1 1.0 1 0 0 100.0 1200.0 425.0 1625.0 View list
13 2070100307 Pretorius, K (Klarissa) 1 1.0 1 0 0 100.0 1208.6 425.0 1633.6 View list
14 1130158246 Page, C (Connor) 1 1.0 1 0 0 100.0 1219.7 425.0 1644.7 View list
15 1100152487 Wang, H (Henry) 1 1.0 1 0 0 100.0 1247.8 425.0 1672.8 View list
16 1130151819 Wu, J (Jayden) 1 1.0 1 0 0 100.0 1219.7 425.0 1644.7 View list
17 1080153411 Walker, T (Travis) 1 0.5 0 1 0 50.0 1208.6 0.0 1208.6 View list
18 1160146705 Zhu, R (Ryan) 1 0.5 0 1 0 50.0 1200.0 0.0 1200.0 View list
19 2140158078 Nathan, A (Amira) 1 0.0 0 0 1 0.0 1219.7 -425.0 794.7 View list
20 1150157296 Rawjee, A (Aiden) 1 0.0 0 0 1 0.0 1219.7 -425.0 794.7 View list