PLAYER PAGE
Jamie Petersen
1090118656Ekurhuleni (GE)Personal
Main rating
| Rating | 1428.4 |
| K-factor | 32 |
| Floor | 934.1 |
| Highest | 1434.1 (2026-09-01) |
| Min/Max +/- allowed | 119 |
| Rating Change () | |
| Games | 20 |
| Score | 10.5 |
| We | 11.16 |
| SWe | -0.16 |
| Temp +/- | -5.3 |
| Penalties | 0 |
| Weight perform | 1362.7 |
| Final +/- | -5.3 |
| New Rating () | |
| Rating | 1423.1 |
| K-factor | 32 |
| Floor | 934.1 |
| Highest | 1434.1 (2026-09-01) |
| Min/Max +/- allowed | 118.8 |
Standard rating
| Rating | 1443.9 |
| K-factor | 32 |
| Floor | 943.9 |
| Highest | 1443.9 (2026-09-01) |
| Min/Max +/- allowed | 117.1 |
| Rating Change () | |
| Games | 14 |
| Score | 7 |
| We | 6.94 |
| SWe | 0.06 |
| Temp +/- | 1.9 |
| Penalties | 0 |
| Weight perform | 1449.2 |
| Final +/- | +5.2 |
| New Rating () | |
| Rating | 1449.2 |
| K-factor | 32 |
| Floor | 949.2 |
| Highest | 1449.2 (2026-10-01) |
| Min/Max +/- allowed | 116.3 |
Rapid rating
| Rating | 1192.1 |
| K-factor | 36 |
| Floor | 700 |
| Highest | 1200 (2018-10-01) |
| Min/Max +/- allowed | 165.8 |
| Rating Change () | |
| Games | 6 |
| Score | 3.5 |
| We | 3.92 |
| SWe | -0.42 |
| Temp +/- | -15.1 |
| Penalties | 0 |
| Weight perform | 0 |
| Final +/- | -15.1 |
| New Rating () | |
| Rating | 1177 |
| K-factor | 36 |
| Floor | 700 |
| Highest | 1200 (2018-10-01) |
| Min/Max +/- allowed | 165.8 |
Blitz rating
| Rating | 1200 |
| K-factor | 36 |
| Floor | 700 |
| Highest | 1200 (2018-10-01) |
| Min/Max +/- allowed | 165.8 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 0 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1200 |
| K-factor | 36 |
| Floor | 700 |
| Highest | 1200 (2018-10-01) |
| Min/Max +/- allowed | 165.8 |
Rating Graph
Tournaments
| # | Tournament | Type | Start | End | Host | Rounds | Rating | Games | Score | Perform | Rat+/- | Details |
| 1 | Gauteng Closed Chess Championships 2026 (U18 Open) | Standard | 2026-10-17 | 2026-10-17 | Ekurhuleni (GE) | 5 | 1428.4 | 5 | 2 | 1514.3 | 12 | Details |
| 2 | Chess Power House October Rapid 2026 (B) | Rapid | 2026-10-11 | 2026-10-11 | Johannesburg Metro (GJM) | 6 | 1428.4 | 6 | 3.5 | 1225.2 | -16.2 | Details |
| 3 | Ekurhuleni Closed 2026 (B) | Standard | 2026-09-19 | 2026-09-19 | Ekurhuleni (GE) | 5 | 1428.4 | 5 | 3 | 1480 | 7 | Details |
| 4 | Chess Power House Heritage Day Open 2026 (B) | Standard | 2026-09-24 | 2026-09-24 | Johannesburg Metro (GJM) | 5 | 1428.4 | 4 | 2 | 1362.9 | -8.1 | Details |
| # | Tournament | Type | Start | End | Host | Rounds | Rating | Games | Score | Perform | Rat+/- | Details |
| 1 | Ekurhuleni Rapid 2026 (B) | Rapid | 2026-08-29 | 2026-08-29 | Ekurhuleni (GE) | 5 | 1434.1 | 5 | 3 | 1375 | -5.7 | Details |
| 2 | Ekurhuleni 3rd Trials 2026 (C) | Standard | 2026-07-25 | 2026-07-25 | Ekurhuleni (GE) | 5 | 1434.1 | 0 | 0 | 500 | 0 | Details |
| 3 | 2026 JMCA Open Chess Tournament (C) | Standard | 2026-08-15 | 2026-08-15 | Tshwane (GTP) | 5 | 1434.1 | 3 | 0 | 947.4 | -39.6 | Details |
| 4 | Ekurhuleni 3rd Standard Tournament 2026 (C) | Standard | 2026-08-08 | 2026-08-08 | Ekurhuleni (GE) | 5 | 1434.1 | 5 | 3 | 1514.6 | 21.9 | Details |
| 5 | South African Open Championship 2026 (Intermediate) | Classical | 2026-06-28 | 2026-07-05 | Cape Town (WCT) | 9 | 1298.6 | 8 | 5 | 1486.4 | 63.3 | Details |
| 6 | Ekurhuleni 2nd Trial 2026 (C) | Standard | 2026-06-20 | 2026-06-20 | Ekurhuleni (GE) | 5 | 1187 | 5 | 4 | 1671.2 | 83.4 | Details |
| 7 | Ekurhuleni 1st Trial 2026 (C) | Standard | 2026-04-11 | 2026-04-11 | Ekurhuleni (GE) | 5 | 1175.8 | 3 | 1 | 1312.5 | 11.2 | Details |
| 8 | Chess Power House Freedom Day Open 2026 (A) | Standard | 2026-04-27 | 2026-04-27 | Ekurhuleni (GE) | 5 | 1193.4 | 4 | 0 | 1098.6 | -17.6 | Details |
| 9 | East Rand Chess Club Open 2026 (C) | Rapid | 2026-03-14 | 2026-03-14 | Ekurhuleni (GE) | 5 | 1188.9 | 5 | 2 | 1232.2 | 4.4 | Details |
| 10 | Ekurhuleni North Schools Teams 2025 (U17 Open) | Standard | 2025-08-16 | 2025-08-16 | Ekurhuleni (GE) | 5 | 1169.8 | 5 | 3 | 1410.1 | 24.1 | Details |
| 11 | Edenvale Germiston Cluster Teams 2025 (High School) | Rapid | 2025-07-25 | 2025-07-25 | Ekurhuleni (GE) | 5 | 1169.8 | 5 | 1 | 989.7 | -13.4 | Details |
| 12 | Ekurhuleni Grand Prix 2019 (C) | Standard | 2019-09-14 | 2019-09-14 | Ekurhuleni (GE) | 5 | 1183.7 | 5 | 2 | 1118.3 | -7.1 | Details |
| 13 | Springs Open 2019 (C) | Standard | 2019-08-31 | 2019-08-31 | Ekurhuleni (GE) | 5 | 1200 | 5 | 2.5 | 1108.8 | -8.1 | Details |
Game statistics ( )
| Games | 11 |
| Wins | 5 |
| Draws | 1 |
| Losses | 5 |
| White | 6 |
| Black | 5 |
| White wins | 4 |
| Black wins | 1 |
| Score | 5.5 |
| Percent | 50 |
| Dp | 0 |
| AOR | 1356.6 |
| Performance | 1356.6 |
Game statistics ()
| Games | 58 |
| Wins | 28 |
| Draws | 1 |
| Losses | 29 |
| White | 31 |
| Black | 27 |
| White wins | 17 |
| Black wins | 11 |
| Score | 28.5 |
| Percent | 49.1 |
| Dp | -7.3 |
| AOR | 1383.3 |
| Performance | 1375.9 |
Game statistics (History)
| Games | 78 |
| Wins | 36 |
| Draws | 2 |
| Losses | 40 |
| White | 41 |
| Black | 37 |
| White wins | 23 |
| Black wins | 13 |
| Score | 37 |
| Percent | 47.4 |
| Dp | -21.8 |
| AOR | 1341.5 |
| Performance | 1319.7 |
Rankings (Main)
| National | |
| Overall | 3028 |
| Gender | 2585 |
| Age group | 432 |
| Gender/Age | 363 |
| Provincial | |
| Overall | 1043 |
| Gender | 890 |
| Age group | 171 |
| Gender/Age | 141 |
| Regional | |
| Overall | 165 |
| Gender | 137 |
| Age group | 28 |
| Gender/Age | 23 |
Rankings (Standard)
| National | |
| Overall | 2464 |
| Gender | 2082 |
| Age group | 339 |
| Gender/Age | 283 |
| Provincial | |
| Overall | 886 |
| Gender | 752 |
| Age group | 136 |
| Gender/Age | 109 |
| Regional | |
| Overall | 131 |
| Gender | 107 |
| Age group | 22 |
| Gender/Age | 17 |
Rankings (Rapid)
| National | |
| Overall | 4720 |
| Gender | 3672 |
| Age group | 618 |
| Gender/Age | 488 |
| Provincial | |
| Overall | 1137 |
| Gender | 889 |
| Age group | 175 |
| Gender/Age | 135 |
| Regional | |
| Overall | 482 |
| Gender | 354 |
| Age group | 67 |
| Gender/Age | 50 |
Rankings (Blitz)
| National | |
| Overall | -1 |
| Gender | -1 |
| Age group | -1 |
| Gender/Age | -1 |
| Provincial | |
| Overall | -1 |
| Gender | -1 |
| Age group | -1 |
| Gender/Age | -1 |
| Regional | |
| Overall | -1 |
| Gender | -1 |
| Age group | -1 |
| Gender/Age | -1 |
Performance ( )
| Games | 11 |
| Score | 5.5 |
| Percent | 50 |
| Aor | 1356.6 |
| Dp | 0 |
| Prat | 1356.6 |
Performance ()
| Games | 58 |
| Score | 28.5 |
| Percent | 49.1 |
| Aor | 1383.3 |
| Dp | -7.3 |
| Prat | 1375.9 |
Performance (12 months)
| Games | 58 |
| Score | 28.5 |
| Percent | 49.1 |
| Aor | 1383.3 |
| Dp | -7.3 |
| Prat | 1375.9 |
Performance (History)
| Games | 78 |
| Score | 37 |
| Percent | 47.4 |
| Aor | 1341.5 |
| Dp | -21.8 |
| Prat | 1319.7 |
Top 5 opponents most often played
| Type | # | Opponent | Games | White | Black | First tournament | Last tournament | Details |
| Overall | 1 | Nolan, C (Christopher) | 3 | 1 | 2 | East Rand Chess Club Open 2026 (C) | Ekurhuleni 3rd Standard Tournament 2026 (C) | Details |
| Overall | 2 | Keet, RM (Robert Michael) | 2 | 1 | 1 | East Rand Chess Club Open 2026 (C) | Ekurhuleni 2nd Trial 2026 (C) | Details |
| Overall | 3 | Okechukwu, C (Covenant) | 2 | 1 | 1 | Ekurhuleni 3rd Standard Tournament 2026 (C) | Ekurhuleni Rapid 2026 (B) | Details |
| Standard | 1 | Nolan, C (Christopher) | 2 | 1 | 1 | Ekurhuleni 1st Trial 2026 (C) | Ekurhuleni 3rd Standard Tournament 2026 (C) | Details |