PLAYER PAGE
Personal
Sierra, O (Oliver)
Chess SA id
1080311914FIDE id
?Date of birth
2008-12-11 (U18)Gender
MaleRegion
Johannesburg Metro (GJM)Citizen
RSATitles
Chess SA registered
NoLast active game
2024-09-14Personal details last changed
1900-01-01Junior GPX Games
Junior GPX Points
| Item | Main | Standard | Rapid | Blitz |
|---|---|---|---|---|
| Rating | 1209.8 | 1200 | 1203.6 | 1200 |
| Raw rating | 1209.8 | 1200 | 1203.6 | 1200 |
| Weighted rating | 1207.3 | 1200 | 1202.7 | 1200 |
| Weighted performance | 0 | 0 | 0 | 0 |
| Floor | 709.8 | 700 | 703.6 | 700 |
| K-factor | 36 | 36 | 36 | 36 |
| Min/Max rating change allowed | 163.5 | 165.8 | 165 | 165.8 |
| Highest rating | 1214.52024-10-01 | 12002024-10-01 | 1212.52024-10-01 | 12002024-10-01 |
| Highest raw rating | 1209.82024-11-01 | 12002024-10-01 | 1203.62024-11-01 | 12002024-10-01 |
| Highest weighted rating | 1206.42025-08-01 | 12002024-10-01 | 1202.32025-08-01 | 12002024-10-01 |
| Highest weighted performance | 1214.52024-10-01 | 12002024-10-01 | 1212.52024-10-01 | 12002024-10-01 |
| Prediction | ||||
|---|---|---|---|---|
| Item | Main | Standard | Rapid | Blitz |
| Rating change | 0 | 0 | 0 | 0 |
| New rating | 1209.8 | 1200 | 1203.6 | 1200 |
| Analysis | ||||
| Rating | 1209.8 | 1200 | 1203.6 | 1200 |
| Raw rating | 1209.8 | 1200 | 1203.6 | 1200 |
| Weighted rating | 1207.3 | 1200 | 1202.7 | |
| Weighted performance | 0 | 0 | 0 | |
| K-factor | 36 | 36 | 36 | 36 |
| Floor | 709.8 | 700 | 703.6 | 700 |
| Max/Min rating change allowed | 163.5 | 165.8 | 165 | 165.8 |
| Games | 0 | 0 | 0 | 0 |
| Score | 0 | 0 | 0 | 0 |
| Expected score | 0 | 0 | 0 | 0 |
| Score-Expected | 0 | 0 | 0 | 0 |
| Temp raw +/- | 0 | 0 | 0 | 0 |
| Final raw +/- | 0 | 0 | 0 | 0 |
| New raw rating | 1209.8 | 1200 | 1203.6 | 1200 |
| New weighted rating | 1207.6 | 1200 | 1202.8 | 1200 |
| New weighted performance | 0 | 0 | 0 | 0 |
| Temp new rating | 1209.8 | 1200 | 1203.6 | 1200 |
| Temp new rating +/- | 0 | 0 | 0 | 0 |
| Final new rating +/- | 0 | 0 | 0 | 0 |
| New rating | 1209.8 | 1200 | 1203.6 | 1200 |
| New K-factor | 36 | 36 | 36 | 36 |
| New floor | 709.8 | 700 | 703.6 | 700 |
| Item | Main | Standard | Rapid | Blitz |
|---|---|---|---|---|
| 0 | 0 | 0 | 0 | |
| 0 | 0 | 0 | 0 | |
| 4 | 0 | 4 | 0 | |
| 0 | 0 | 0 | 0 | |
| 0 | 0 | 0 | 0 | |
| 0 | 0 | 0 | 0 | |
| History | 4 | 0 | 4 | 0 |
| Games since | |||||||||||||||||
| Main4 | Standard0 | Rapid4 | Blitz0 | ||||||||||||||
| Gender | Male | ||||||||||||||||
| Age group | U18 | ||||||||||||||||
| Region | Johannesburg Metro (GJM) | ||||||||||||||||
| Province | Gauteng (GT) | ||||||||||||||||
| Main | RSA | Province | Region | ||||||||||||||
| Overall | -1 | -1 | -1 | ||||||||||||||
| Male | -1 | -1 | -1 | ||||||||||||||
| U18 | -1 | -1 | -1 | ||||||||||||||
| U18 Male | -1 | -1 | -1 | ||||||||||||||
| Standard | RSA | Province | Region | ||||||||||||||
| Overall | -1 | -1 | -1 | ||||||||||||||
| Male | -1 | -1 | -1 | ||||||||||||||
| U18 | -1 | -1 | -1 | ||||||||||||||
| U18 Male | -1 | -1 | -1 | ||||||||||||||
| Rapid | RSA | Province | Region | ||||||||||||||
| Overall | -1 | -1 | -1 | ||||||||||||||
| Male | -1 | -1 | -1 | ||||||||||||||
| U18 | -1 | -1 | -1 | ||||||||||||||
| U18 Male | -1 | -1 | -1 | ||||||||||||||
| Blitz | RSA | Province | Region | ||||||||||||||
| Overall | -1 | -1 | -1 | ||||||||||||||
| Male | -1 | -1 | -1 | ||||||||||||||
| U18 | -1 | -1 | -1 | ||||||||||||||
| U18 Male | -1 | -1 | -1 | ||||||||||||||
| Games | Score | % | Dp | AvgOpp | Performance | |
| Main | 0 | 0 | 0 | 0 | 0 | 0 |
| Standard | 0 | 0 | 0 | 0 | 0 | 0 |
| Rapid | 0 | 0 | 0 | 0 | 0 | 0 |
| Blitz | 0 | 0 | 0 | 0 | 0 | 0 |
| Games | Score | % | Dp | AvgOpp | Performance | |
| Main | 0 | 0 | 0 | 0 | 0 | 0 |
| Standard | 0 | 0 | 0 | 0 | 0 | 0 |
| Rapid | 0 | 0 | 0 | 0 | 0 | 0 |
| Blitz | 0 | 0 | 0 | 0 | 0 | 0 |
| History | ||||||
| Games | Score | % | Dp | AvgOpp | Performance | |
| Main | 4 | 2 | 50 | 0 | 1285.9 | 1285.9 |
| Standard | 0 | 0 | 0 | 0 | 0 | 0 |
| Rapid | 4 | 2 | 50 | 0 | 1285.9 | 1285.9 |
| Blitz | 0 | 0 | 0 | 0 | 0 | 0 |
| Date | Main | Standard | Rapid | Blitz |
| 2025-09-30 | 1209.8 | 1200 | 1203.6 | 1200 |
| 2025-09-01 | 1209.8 | 1200 | 1203.6 | 1200 |
| 2025-08-01 | 1209.8 | 1200 | 1203.6 | 1200 |
| 2025-07-01 | 1209.8 | 1200 | 1203.6 | 1200 |
| 2025-06-01 | 1209.8 | 1200 | 1203.6 | 1200 |
| 2025-05-01 | 1209.8 | 1200 | 1203.6 | 1200 |
| 2025-04-01 | 1209.8 | 1200 | 1203.6 | 1200 |
| 2025-03-01 | 1209.8 | 1200 | 1203.6 | 1200 |
| 2025-02-01 | 1209.8 | 1200 | 1203.6 | 1200 |
| 2025-01-01 | 1209.8 | 1200 | 1203.6 | 1200 |
| 2024-12-01 | 1209.8 | 1200 | 1203.6 | 1200 |
| 2024-11-01 | 1209.8 | 1200 | 1203.6 | 1200 |
| 2024-10-01 | 1200 | 1200 | 1200 | 1200 |
| 2024-09-01 | 1200 | 1200 | 1200 | 1200 |
| 2024-08-01 | 1200 | 1200 | 1200 | 1200 |
| 2024-07-01 | 1200 | 1200 | 1200 | 1200 |
| 2024-06-01 | 1200 | 1200 | 1200 | 1200 |
| 2024-08-01 | 1200 | 1200 | 1200 | 1200 |
| 2024-04-01 | 1200 | 1200 | 1200 | 1200 |
| 2024-03-01 | 1200 | 1200 | 1200 | 1200 |
| 2024-02-01 | 1200 | 1200 | 1200 | 1200 |
| 2024-01-01 | 1200 | 1200 | 1200 | 1200 |
| 2023-12-01 | 1200 | 1200 | 1200 | 1200 |
| 2023-11-01 | 1200 | 1200 | 1200 | 1200 |
Comming soon.
Tournaments
| # | Tournament | Start | End | Type | Host | Rounds | Games | Score | Cfr | Analysis |
|---|
| # | Tournament | Start | End | Type | Host | Rounds | Games | Score | Cfr | Analysis |
|---|
Last 500 tournaments since 01 January 2018
| # | Tournament | Start | End | Type | Host | Rounds | Games | Score | Cfr | Analysis |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Wits Young Kudu 2024 (Secondary School) | 2024-09-14 | 2024-09-14 | Rapid | Johannesburg Metro (GJM) | 5 | 4 | 2 | Yes | Analysis |
Top 3 Streaks
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 1 | TournamentWits Young Kudu 2024 | TournamentWits Young Kudu 2024 | ||||||
| date2024-09-14 | rnd5 | typeRapid | result1 | date2024-09-14 | rnd5 | typeRapid | result1 | ||
| OpponentChan-Henry, S (Sophie) | OpponentChan-Henry, S (Sophie) | ||||||||
| 2 | 1 | TournamentWits Young Kudu 2024 | TournamentWits Young Kudu 2024 | ||||||
| date2024-09-14 | rnd2 | typeRapid | result1 | date2024-09-14 | rnd2 | typeRapid | result1 | ||
| OpponentAlemayehu, A (Abigail) | OpponentAlemayehu, A (Abigail) | ||||||||
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 1 | TournamentWits Young Kudu 2024 | TournamentWits Young Kudu 2024 | ||||||
| date2024-09-14 | rnd5 | typeRapid | result1 | date2024-09-14 | rnd5 | typeRapid | result1 | ||
| OpponentChan-Henry, S (Sophie) | OpponentChan-Henry, S (Sophie) | ||||||||
| 2 | 1 | TournamentWits Young Kudu 2024 | TournamentWits Young Kudu 2024 | ||||||
| date2024-09-14 | rnd2 | typeRapid | result1 | date2024-09-14 | rnd2 | typeRapid | result1 | ||
| OpponentAlemayehu, A (Abigail) | OpponentAlemayehu, A (Abigail) | ||||||||
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 1 | TournamentWits Young Kudu 2024 | TournamentWits Young Kudu 2024 | ||||||
| date2024-09-14 | rnd5 | typeRapid | result1 | date2024-09-14 | rnd5 | typeRapid | result1 | ||
| OpponentChan-Henry, S (Sophie) | OpponentChan-Henry, S (Sophie) | ||||||||
| 2 | 1 | TournamentWits Young Kudu 2024 | TournamentWits Young Kudu 2024 | ||||||
| date2024-09-14 | rnd2 | typeRapid | result1 | date2024-09-14 | rnd2 | typeRapid | result1 | ||
| OpponentAlemayehu, A (Abigail) | OpponentAlemayehu, A (Abigail) | ||||||||
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 1 | TournamentWits Young Kudu 2024 | TournamentWits Young Kudu 2024 | ||||||
| date2024-09-14 | rnd5 | typeRapid | result1 | date2024-09-14 | rnd5 | typeRapid | result1 | ||
| OpponentChan-Henry, S (Sophie) | OpponentChan-Henry, S (Sophie) | ||||||||
| 2 | 1 | TournamentWits Young Kudu 2024 | TournamentWits Young Kudu 2024 | ||||||
| date2024-09-14 | rnd2 | typeRapid | result1 | date2024-09-14 | rnd2 | typeRapid | result1 | ||
| OpponentAlemayehu, A (Abigail) | OpponentAlemayehu, A (Abigail) | ||||||||
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
Top 10 opponents most often played
| # | Opponent | Main | Standard | Rapid | Blitz | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gms | Score | Dp | Gms | Score | Dp | Gms | Score | Dp | Gms | Score | Dp | ||
| Aor | Prat | Aor | Prat | Aor | Prat | Aor | Prat | ||||||
| 1 | Lake ,E (Ethan) | 1 | 0 | -425 | 0 | 0 | 0 | 1 | 0 | -425 | 0 | 0 | 0 |
| 1474.2 | 1049.2 | 0 | 0 | 1256.9 | 1049.2 | 0 | 0 | ||||||
| 2 | Fritz ,W (Wayde) | 1 | 0 | -425 | 0 | 0 | 0 | 1 | 0 | -425 | 0 | 0 | 0 |
| 1229.9 | 804.9 | 0 | 0 | 1200 | 804.9 | 0 | 0 | ||||||
| 3 | Alemayehu ,A (Abigail) | 1 | 1 | 425 | 0 | 0 | 0 | 1 | 1 | 425 | 0 | 0 | 0 |
| 1200 | 1625 | 0 | 0 | 1200 | 1625 | 0 | 0 | ||||||
| 4 | Chan-Henry ,S (Sophie) | 1 | 1 | 425 | 0 | 0 | 0 | 1 | 1 | 425 | 0 | 0 | 0 |
| 1239.5 | 1664.5 | 0 | 0 | 1221.6 | 1664.5 | 0 | 0 | ||||||
Norms
| # | Norm | Tournament | Start | End | Rounds | Games | Score | Details |
|---|---|---|---|---|---|---|---|---|