Player Page

Witbooi, JB (Jan)
Dob: 1999/02/20 (Adult)
Gender: Male
Chess SA id: 199055897
FIDE id:
Region: Dr Kenneth Kaunda (NWP)
Citizen: RSA
Title(s):
Last active: 2022/12/09 (521 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 rating1320.7
Curent Weighted rating1321.4
Curent Weighted performance793.3
Current official/published rating (highest between Raw, WR and WP)1321.4
Current floor (min rating allowed)830.8
Current highest rating achieved1330.8
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)±139.6
Current Raw change used (final)0.0
Projected new Raw rating1320.7
Projected new Weighed rating1321.2
Projected new Weighted performance793.3
Projected new official/published rating (highest between new Raw, new WR and new WP)1321.2
Projected effective change (new Official - current Official)-0.2
Projected new highest rating1330.8
Projected new floor830.8
Projected new K-facor36
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 rating1322.2
Curent Weighted rating1322.7
Curent Weighted performance0.0
Current official/published rating (highest between Raw, WR and WP)1322.7
Current floor (min rating allowed)829.4
Current highest rating achieved1329.4
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)±139.3
Current Raw change used (final)0.0
Projected new Raw rating1322.2
Projected new Weighed rating1322.6
Projected new Weighted performance0.0
Projected new official/published rating (highest between new Raw, new WR and new WP)1322.6
Projected effective change (new Official - current Official)-0.1
Projected new highest rating1329.4
Projected new floor829.4
Projected new K-facor36
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 rating1207.1
Curent Weighted rating1207.1
Curent Weighted performance0.0
Current official/published rating (highest between Raw, WR and WP)1207.1
Current floor (min rating allowed)707.1
Current highest rating achieved1207.1
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)±164.1
Current Raw change used (final)0.0
Projected new Raw rating1207.1
Projected new Weighed rating1207.1
Projected new Weighted performance
Projected new official/published rating (highest between new Raw, new WR and new WP)1207.1
Projected effective change (new Official - current Official)=0.0
Projected new highest rating1207.1
Projected new floor707.1
Projected new K-facor36
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 rating1319.5
Curent Weighted rating1319.5
Curent Weighted performance0.0
Current official/published rating (highest between Raw, WR and WP)1319.5
Current floor (min rating allowed)707.1
Current highest rating achieved1319.5
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)±139.9
Current Raw change used (final)0.0
Projected new Raw rating1319.5
Projected new Weighed rating1319.5
Projected new Weighted performance0.0
Projected new official/published rating (highest between new Raw, new WR and new WP)1319.5
Projected effective change (new Official - current Official)=0.0
Projected new highest rating1319.5
Projected new floor707.1
Projected new K-facor36
Tournaments
Did not participate this month.
Did not participate this year.
#TournamentStartEndHostTypeTimeWeightRoundsGamesScoreMainTypeAnalysis
6 Ussa Chess Championships 2022 (Open) 2022/12/05 2022/12/09 Frances Baard (NCF) Standard 120 1.00 9 9 4.5 1330.8 1329.4 Analysis
5 JNW Club - Trinityhouse Little Falls Open 2020 (B) 2020/03/14 2020/03/14 Johannesburg Metro (GJM) Standard 60 0.83 5 5 4.5 1241.8 1216.7 Analysis
4 2019 USSA Championships (Blitz) 2019/12/04 2019/12/04 Sarah Baartman (ESB) Blitz 5 0.18 9 9 5.5 1169.9 1207.1 Analysis
3 2019 USSA Championships (Open) 2019/12/02 2019/12/06 Sarah Baartman (ESB) Standard 90 0.94 9 9 4.0 1169.9 1169.9 Analysis
2 Hervormde Kerk 2018 (A) 2018/03/10 2018/03/10 Dr Kenneth Kaunda (NWP) Standard 60 0.83 5 0 0.0 1169.9 1169.9 Analysis
1 South African Junior Team Championships 2017 (U20A) 2018/01/04 2018/01/08 4 Knights (4K) Standard 120 1.00 7 7 0.0 1207.1 1207.1 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 39 15 7 17 18.5 47.4 -21.8 1425.3 1403.5
White 18 7 4 7 9.0 50.0 0.0 1457.8 1457.8
Black 21 8 3 10 9.5 45.2 -40.5 1397.5 1357.0
Standard All 30 10 6 14 13.0 43.3 -56.7 1408.4 1351.7
White 13 5 3 5 6.5 50.0 0.0 1445.6 1445.6
Black 17 5 3 9 6.5 38.2 -100.0 1379.9 1279.9
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 9 5 1 3 5.5 61.1 94.4 1481.9 1576.3
White 5 2 1 2 2.5 50.0 0.0 1489.5 1489.5
Black 4 3 0 1 3.0 75.0 212.5 1472.3 1684.8
Top 20 opponents most often played
#Chess SA idNameGamesScoreWinsDrawsLosses%AorDpPerformView
1 198011986 Hastie, SEH (Sachin) 2 0.5 0 1 1 25.0 1188.5 -212.5 976.0 View list
2 193020110 Malatji, HT (Happy) 1 1.0 1 0 0 100.0 1169.9 425.0 1594.9 View list
3 194052815 Mafongosi, X (Xhanti) 1 1.0 1 0 0 100.0 1169.9 425.0 1594.9 View list
4 1020140331 Mafalo, K (Khutso) 1 1.0 1 0 0 100.0 1330.8 425.0 1755.8 View list
5 100081978 Madiya, S (Sisekelo) 1 1.0 1 0 0 100.0 1169.9 425.0 1594.9 View list
6 196018691 Lubambo, S (Skhulile) 1 1.0 1 0 0 100.0 1169.9 425.0 1594.9 View list
7 103060504 Botes, C (Christiaan) 1 1.0 1 0 0 100.0 1241.8 425.0 1666.8 View list
8 101001711 Bekker, GD (Gerhardus) 1 1.0 1 0 0 100.0 1241.8 425.0 1666.8 View list
9 1000119871 Mathe, S (Sibusiso) 1 1.0 1 0 0 100.0 1169.9 425.0 1594.9 View list
10 197057622 Mithi, D (Dumiso) 1 1.0 1 0 0 100.0 1169.9 425.0 1594.9 View list
11 1990136225 Ndlovu, S (Siboniso) 1 1.0 1 0 0 100.0 1330.8 425.0 1755.8 View list
12 194027889 Nkoana, MN (Mohololo) 1 1.0 1 0 0 100.0 1241.8 425.0 1666.8 View list
13 1990119863 Sajini, A (Athenkosi) 1 1.0 1 0 0 100.0 1169.9 425.0 1594.9 View list
14 1980147016 Sithole, B (Bongumusa Kevin) 1 1.0 1 0 0 100.0 1330.8 425.0 1755.8 View list
15 1000119879 Tebogo, B (Blessings Makofane) 1 1.0 1 0 0 100.0 1169.9 425.0 1594.9 View list
16 102080948 Van Stryp, O (Ockert) 1 1.0 1 0 0 100.0 1241.8 425.0 1666.8 View list
17 1010115854 De Villiers, AM (Ammen Mohammed) 1 0.5 0 1 0 50.0 1330.8 0.0 1330.8 View list
18 106073248 Allison, LM (Liam) 1 0.5 0 1 0 50.0 1241.8 0.0 1241.8 View list
19 100069253 Mbokazi, B (Banele) 1 0.5 0 1 0 50.0 1330.8 0.0 1330.8 View list
20 1020140339 Mosehlana, T (Tshepang) 1 0.5 0 1 0 50.0 1330.8 0.0 1330.8 View list