PLAYER PAGE
Personal
Mairosi, C (Cosmas)
Chess SA id
177019668FIDE id
?Date of birth
1977-02-08 (Adult)Gender
MaleRegion
Cape Town (WCT)Citizen
RSATitles
PAChess SA registered
NoLast active game
2024-08-03Personal details last changed
1900-01-01Junior GPX Games
Junior GPX Points
| Item | Main | Standard | Rapid | Blitz |
|---|---|---|---|---|
| Rating | 1391.7 | 1384.6 | 1422.9 | 1422.9 |
| Raw rating | 1391.6 | 1384.5 | 1422.9 | 1422.9 |
| Weighted rating | 1391.7 | 1384.6 | 1422.9 | 1422.9 |
| Weighted performance | 0 | 0 | 0 | 0 |
| Floor | 922.9 | 922.9 | 922.9 | 922.9 |
| K-factor | 32 | 32 | 32 | 32 |
| Min/Max rating change allowed | 126.2 | 127.5 | 120.7 | 120.7 |
| Highest rating | 1422.92018-03-01 | 1422.92018-03-01 | 1422.92018-03-01 | 1422.92018-03-01 |
| Highest raw rating | 1422.92018-02-01 | 1422.92018-02-01 | 1422.92024-02-01 | 1422.92024-02-01 |
| Highest weighted rating | 1422.92018-03-01 | 1422.92018-03-01 | 1422.92018-03-01 | 1422.92018-03-01 |
| Highest weighted performance | 12182024-09-01 | 1204.52024-09-01 | 12002024-02-01 | 12002024-02-01 |
| Prediction | ||||
|---|---|---|---|---|
| Item | Main | Standard | Rapid | Blitz |
| Rating change | 0.2 | 0.1 | 0 | 0 |
| New rating | 1391.8 | 1384.7 | 1422.9 | 1422.9 |
| Analysis | ||||
| Rating | 1391.7 | 1384.6 | 1422.9 | 1422.9 |
| Raw rating | 1391.6 | 1384.5 | 1422.9 | 1422.9 |
| Weighted rating | 1391.7 | 1384.6 | 1422.9 | |
| Weighted performance | 0 | 0 | 0 | |
| K-factor | 32 | 32 | 32 | 32 |
| Floor | 922.9 | 922.9 | 922.9 | 922.9 |
| Max/Min rating change allowed | 126.2 | 127.5 | 120.7 | 120.7 |
| 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 | 1391.6 | 1384.5 | 1422.9 | 1422.9 |
| New weighted rating | 1391.8 | 1384.7 | 1422.9 | 1422.9 |
| New weighted performance | 0 | 0 | 0 | 0 |
| Temp new rating | 1391.8 | 1384.7 | 1422.9 | 1422.9 |
| Temp new rating +/- | 0.2 | 0.1 | 0 | 0 |
| Final new rating +/- | 0.2 | 0.1 | 0 | 0 |
| New rating | 1391.8 | 1384.7 | 1422.9 | 1422.9 |
| New K-factor | 32 | 32 | 32 | 32 |
| New floor | 922.9 | 922.9 | 922.9 | 922.9 |
| Item | Main | Standard | Rapid | Blitz |
|---|---|---|---|---|
| 0 | 0 | 0 | 0 | |
| 0 | 0 | 0 | 0 | |
| 9 | 9 | 0 | 0 | |
| 0 | 0 | 0 | 0 | |
| 0 | 0 | 0 | 0 | |
| 0 | 0 | 0 | 0 | |
| History | 178 | 115 | 24 | 39 |
| Games since | |||||||||||||||||
| Main9 | Standard9 | Rapid0 | Blitz0 | ||||||||||||||
| Gender | Male | ||||||||||||||||
| Age group | Adult | ||||||||||||||||
| Region | Cape Town (WCT) | ||||||||||||||||
| Province | Western Cape (WC) | ||||||||||||||||
| Main | RSA | Province | Region | ||||||||||||||
| Overall | -1 | -1 | -1 | ||||||||||||||
| Male | -1 | -1 | -1 | ||||||||||||||
| Adult | -1 | -1 | -1 | ||||||||||||||
| Adult Male | -1 | -1 | -1 | ||||||||||||||
| Standard | RSA | Province | Region | ||||||||||||||
| Overall | -1 | -1 | -1 | ||||||||||||||
| Male | -1 | -1 | -1 | ||||||||||||||
| Adult | -1 | -1 | -1 | ||||||||||||||
| Adult Male | -1 | -1 | -1 | ||||||||||||||
| Rapid | RSA | Province | Region | ||||||||||||||
| Overall | -1 | -1 | -1 | ||||||||||||||
| Male | -1 | -1 | -1 | ||||||||||||||
| Adult | -1 | -1 | -1 | ||||||||||||||
| Adult Male | -1 | -1 | -1 | ||||||||||||||
| Blitz | RSA | Province | Region | ||||||||||||||
| Overall | -1 | -1 | -1 | ||||||||||||||
| Male | -1 | -1 | -1 | ||||||||||||||
| Adult | -1 | -1 | -1 | ||||||||||||||
| Adult 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 | 14 | 7.5 | 53.57 | 30.4 | 1315.3 | 1345.6 |
| Standard | 14 | 7.5 | 53.57 | 30.4 | 1315.3 | 1345.6 |
| Rapid | 0 | 0 | 0 | 0 | 0 | 0 |
| Blitz | 0 | 0 | 0 | 0 | 0 | 0 |
| Date | Main | Standard | Rapid | Blitz |
| 2025-11-01 | 1391.6 | 1384.5 | 1422.9 | 1422.9 |
| 2025-09-30 | 1391.6 | 1384.5 | 1422.9 | 1422.9 |
| 2025-09-01 | 1391.6 | 1384.5 | 1422.9 | 1422.9 |
| 2025-08-01 | 1391.6 | 1384.5 | 1422.9 | 1422.9 |
| 2025-07-01 | 1391.6 | 1384.5 | 1422.9 | 1422.9 |
| 2025-06-01 | 1391.6 | 1384.5 | 1422.9 | 1422.9 |
| 2025-05-01 | 1391.6 | 1384.5 | 1422.9 | 1422.9 |
| 2025-04-01 | 1391.6 | 1384.5 | 1422.9 | 1422.9 |
| 2025-03-01 | 1391.6 | 1384.5 | 1422.9 | 1422.9 |
| 2025-02-01 | 1391.6 | 1384.5 | 1422.9 | 1422.9 |
| 2025-01-01 | 1391.6 | 1384.5 | 1422.9 | 1422.9 |
| 2024-12-01 | 1391.6 | 1384.5 | 1422.9 | 1422.9 |
| 2024-11-01 | 1391.6 | 1384.5 | 1422.9 | 1422.9 |
| 2024-10-01 | 1391.6 | 1384.5 | 1422.9 | 1422.9 |
| 2024-09-01 | 1394.7 | 1387.1 | 1422.9 | 1422.9 |
| 2024-08-01 | 1394.7 | 1387.1 | 1422.9 | 1422.9 |
| 2024-07-01 | 1394.7 | 1387.1 | 1422.9 | 1422.9 |
| 2024-09-01 | 1394.7 | 1387.1 | 1422.9 | 1422.9 |
| 2024-05-01 | 1394.7 | 1387.1 | 1422.9 | 1422.9 |
| 2024-04-01 | 1394.7 | 1387.1 | 1422.9 | 1422.9 |
| 2024-03-01 | 1394.7 | 1387.1 | 1422.9 | 1422.9 |
| 2024-02-01 | 1369.1 | 1366.9 | 1422.9 | 1422.9 |
| 2024-01-01 | 1369.1 | 1366.9 | 1422.9 | 1422.9 |
| 2023-12-01 | 1369.1 | 1366.9 | 1422.9 | 1422.9 |
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 | CT League 2024 (D) | 2024-08-03 | 2024-08-03 | Standard | Cape Town (WCT) | 6 | 3 | 2 | Yes | Analysis |
| 2 | Cape of Good Hope Open Chess Tournament 2024 (Intermediate) | 2024-02-17 | 2024-02-17 | Standard | Cape Town (WCT) | 6 | 6 | 4 | Yes | Analysis |
| 3 | 2019 National Club Chess Championships (B) | 2019-09-27 | 2019-09-29 | Standard | Cape Town (WCT) | 6 | 5 | 1.5 | Yes | Analysis |
Top 3 Streaks
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 4 | TournamentCape of Good Hope Open Chess Tournament 2024 | TournamentCT League 2024 | ||||||
| date2024-02-17 | rnd5 | typeStandard | result1 | date2024-08-03 | rnd5 | typeStandard | result1 | ||
| OpponentMuller, H (Helgard) | OpponentWillenberg, I (Ivan) | ||||||||
| 2 | 4 | Tournament2019 National Club Chess Championships | TournamentCape of Good Hope Open Chess Tournament 2024 | ||||||
| date2019-09-29 | rnd6 | typeStandard | result0.5 | date2024-02-17 | rnd3 | typeStandard | result1 | ||
| OpponentArendse, KC (Kelli Candice) | OpponentVan Zyl, M (Mea) | ||||||||
| 3 | 1 | Tournament2019 National Club Chess Championships | Tournament2019 National Club Chess Championships | ||||||
| date2019-09-28 | rnd3 | typeStandard | result1 | date2019-09-28 | rnd3 | typeStandard | result1 | ||
| OpponentLewaks, A (Andre) | OpponentLewaks, A (Andre) | ||||||||
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 4 | TournamentCape of Good Hope Open Chess Tournament 2024 | TournamentCT League 2024 | ||||||
| date2024-02-17 | rnd5 | typeStandard | result1 | date2024-08-03 | rnd5 | typeStandard | result1 | ||
| OpponentMuller, H (Helgard) | OpponentWillenberg, I (Ivan) | ||||||||
| 2 | 4 | Tournament2019 National Club Chess Championships | TournamentCape of Good Hope Open Chess Tournament 2024 | ||||||
| date2019-09-29 | rnd6 | typeStandard | result0.5 | date2024-02-17 | rnd3 | typeStandard | result1 | ||
| OpponentArendse, KC (Kelli Candice) | OpponentVan Zyl, M (Mea) | ||||||||
| 3 | 1 | Tournament2019 National Club Chess Championships | Tournament2019 National Club Chess Championships | ||||||
| date2019-09-28 | rnd3 | typeStandard | result1 | date2019-09-28 | rnd3 | typeStandard | result1 | ||
| OpponentLewaks, A (Andre) | OpponentLewaks, A (Andre) | ||||||||
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | TournamentCT League 2024 | TournamentCT League 2024 | ||||||
| date2024-08-03 | rnd4 | typeStandard | result1 | date2024-08-03 | rnd5 | typeStandard | result1 | ||
| OpponentDe Lilly, M (Mogamat Yaseen) | OpponentWillenberg, I (Ivan) | ||||||||
| 2 | 1 | TournamentCape of Good Hope Open Chess Tournament 2024 | TournamentCape of Good Hope Open Chess Tournament 2024 | ||||||
| date2024-02-17 | rnd5 | typeStandard | result1 | date2024-02-17 | rnd5 | typeStandard | result1 | ||
| OpponentMuller, H (Helgard) | OpponentMuller, H (Helgard) | ||||||||
| 3 | 1 | TournamentCape of Good Hope Open Chess Tournament 2024 | TournamentCape of Good Hope Open Chess Tournament 2024 | ||||||
| date2024-02-17 | rnd3 | typeStandard | result1 | date2024-02-17 | rnd3 | typeStandard | result1 | ||
| OpponentVan Zyl, M (Mea) | OpponentVan Zyl, M (Mea) | ||||||||
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | TournamentCT League 2024 | TournamentCT League 2024 | ||||||
| date2024-08-03 | rnd4 | typeStandard | result1 | date2024-08-03 | rnd5 | typeStandard | result1 | ||
| OpponentDe Lilly, M (Mogamat Yaseen) | OpponentWillenberg, I (Ivan) | ||||||||
| 2 | 1 | TournamentCape of Good Hope Open Chess Tournament 2024 | TournamentCape of Good Hope Open Chess Tournament 2024 | ||||||
| date2024-02-17 | rnd5 | typeStandard | result1 | date2024-02-17 | rnd5 | typeStandard | result1 | ||
| OpponentMuller, H (Helgard) | OpponentMuller, H (Helgard) | ||||||||
| 3 | 1 | TournamentCape of Good Hope Open Chess Tournament 2024 | TournamentCape of Good Hope Open Chess Tournament 2024 | ||||||
| date2024-02-17 | rnd3 | typeStandard | result1 | date2024-02-17 | rnd3 | typeStandard | result1 | ||
| OpponentVan Zyl, M (Mea) | OpponentVan Zyl, M (Mea) | ||||||||
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| # | 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 | Arendse ,KC (Kelli Candice) | 1 | 0.5 | 0 | 1 | 0.5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1252.9 | 1252.9 | 1276.8 | 1252.9 | 0 | 0 | 0 | 0 | ||||||
| 2 | Muller ,H (Helgard) | 1 | 1 | 425 | 1 | 1 | 425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1460.7 | 1885.7 | 1416.2 | 1885.7 | 0 | 0 | 0 | 0 | ||||||
| 3 | Hamdulay ,D (Dillon) | 1 | 0.5 | 0 | 1 | 0.5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1230.7 | 1230.7 | 1195.6 | 1230.7 | 0 | 0 | 0 | 0 | ||||||
| 4 | Van Zyl ,M (Mea) | 1 | 1 | 425 | 1 | 1 | 425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1510.4 | 1935.4 | 1504.3 | 1935.4 | 0 | 0 | 0 | 0 | ||||||
| 5 | Waldeck ,LJD (Lesley John David) | 1 | 0 | -425 | 1 | 0 | -425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1292.9 | 867.9 | 1305.2 | 867.9 | 0 | 0 | 0 | 0 | ||||||
| 6 | Steytler ,N (Nic) | 1 | 0 | -425 | 1 | 0 | -425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1200 | 775 | 1200 | 775 | 0 | 0 | 0 | 0 | ||||||
| 7 | Willenberg ,I (Ivan) | 1 | 1 | 425 | 1 | 1 | 425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1358.6 | 1783.6 | 1377.2 | 1783.6 | 0 | 0 | 0 | 0 | ||||||
| 8 | De Lilly ,M (Mogamat Yaseen) | 1 | 1 | 425 | 1 | 1 | 425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1125.6 | 1550.6 | 1119.6 | 1550.6 | 0 | 0 | 0 | 0 | ||||||
| 9 | Lewaks ,A (Andre) | 1 | 1 | 425 | 1 | 1 | 425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1256.1 | 1681.1 | 1248.1 | 1681.1 | 0 | 0 | 0 | 0 | ||||||
| 10 | Petersen-Bizaare ,S (Shaqeel) | 1 | 0.5 | 0 | 1 | 0.5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1200 | 1200 | 1200 | 1200 | 0 | 0 | 0 | 0 | ||||||
Norms
| # | Norm | Tournament | Start | End | Rounds | Games | Score | Details |
|---|---|---|---|---|---|---|---|---|