PLAYER PAGE
Isabella Cornelissen
2120316619West Coast (WCU)Personal
Main rating
| Rating | 1191.2 |
| K-factor | 40 |
| Floor | 699.9 |
| Highest | 1199.9 (2025-06-01) |
| Min/Max +/- allowed | 166 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 0 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1191.2 |
| K-factor | 40 |
| Floor | 699.9 |
| Highest | 1199.9 (2025-06-01) |
| Min/Max +/- allowed | 165.8 |
Standard rating
| Rating | 1197.7 |
| K-factor | 36 |
| Floor | 700 |
| Highest | 1200 (2025-03-01) |
| 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 | 1197.7 |
| K-factor | 36 |
| Floor | 700 |
| Highest | 1200 (2025-03-01) |
| Min/Max +/- allowed | 165.8 |
Rapid rating
| Rating | 1181.4 |
| K-factor | 40 |
| Floor | 699.9 |
| Highest | 1199.9 (2025-06-01) |
| 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 | 1181.4 |
| K-factor | 40 |
| Floor | 699.9 |
| Highest | 1199.9 (2025-06-01) |
| Min/Max +/- allowed | 165.8 |
Blitz rating
| Rating | 1200 |
| K-factor | 36 |
| Floor | 700 |
| Highest | 1200 (2025-03-01) |
| 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 (2025-03-01) |
| Min/Max +/- allowed | 165.8 |
Rating Graph
Tournaments
| # | Tournament | Type | Start | End | Host | Rounds | Rating | Games | Score | Perform | Rat+/- | Details |
| # | Tournament | Type | Start | End | Host | Rounds | Rating | Games | Score | Perform | Rat+/- | Details |
| 1 | West Coast Schools Chess Grand Challenge League 2025 (PS Development) | Rapid | 2025-11-08 | 2025-11-08 | West Coast (WCU) | 5 | 1193.7 | 5 | 3 | 1298.2 | 0 | Details |
| 2 | Western Cape Schools - Top Schools 2025 (U13 Girls) | Standard | 2025-09-06 | 2025-09-07 | Overberg (WOS) | 6 | 1197.8 | 5 | 2 | 1197.1 | 0 | Details |
| 3 | Pedro Booyse Top Schools 2025 (U13 Girls) | Rapid | 2025-08-23 | 2025-08-23 | West Coast (WCU) | 6 | 1199.9 | 6 | 1.5 | 1046.6 | 0 | Details |
| 4 | Lower West Coast Prestige 2025 (U13 Girls) | Rapid | 2025-02-22 | 2025-02-22 | West Coast (WCU) | 5 | 1200 | 5 | 2 | 1132.3 | 0 | Details |
Game statistics ( )
| Games | 0 |
| Wins | 0 |
| Draws | 0 |
| Losses | 0 |
| White | 0 |
| Black | 0 |
| White wins | 0 |
| Black wins | 0 |
| Score | 0 |
| Percent | 0 |
| Dp | 0 |
| AOR | 0 |
| Performance | 0 |
Game statistics ()
| Games | 0 |
| Wins | 0 |
| Draws | 0 |
| Losses | 0 |
| White | 0 |
| Black | 0 |
| White wins | 0 |
| Black wins | 0 |
| Score | 0 |
| Percent | 0 |
| Dp | 0 |
| AOR | 0 |
| Performance | 0 |
Game statistics (History)
| Games | 21 |
| Wins | 8 |
| Draws | 1 |
| Losses | 12 |
| White | 10 |
| Black | 11 |
| White wins | 3 |
| Black wins | 5 |
| Score | 8.5 |
| Percent | 40.5 |
| Dp | -81 |
| AOR | 1243.7 |
| Performance | 1162.7 |
Rankings (Main)
| National | |
| Overall | 14381 |
| Gender | 3231 |
| Age group | 2732 |
| Gender/Age | 689 |
| Provincial | |
| Overall | 4239 |
| Gender | 1050 |
| Age group | 785 |
| Gender/Age | 206 |
| Regional | |
| Overall | 501 |
| Gender | 129 |
| Age group | 117 |
| Gender/Age | 39 |
Rankings (Standard)
| 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 |
Rankings (Rapid)
| National | |
| Overall | 5140 |
| Gender | 1217 |
| Age group | 1102 |
| Gender/Age | 306 |
| Provincial | |
| Overall | 2067 |
| Gender | 517 |
| Age group | 428 |
| Gender/Age | 121 |
| Regional | |
| Overall | 446 |
| Gender | 124 |
| Age group | 106 |
| Gender/Age | 37 |
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 | 0 |
| Score | 0 |
| Percent | 0 |
| Aor | 0 |
| Dp | 0 |
| Prat | 0 |
Performance ()
| Games | 0 |
| Score | 0 |
| Percent | 0 |
| Aor | 0 |
| Dp | 0 |
| Prat | 0 |
Performance (12 months)
| Games | 16 |
| Score | 6.5 |
| Percent | 40.6 |
| Aor | 1251.9 |
| Dp | -79.7 |
| Prat | 1172.3 |
Performance (History)
| Games | 21 |
| Score | 8.5 |
| Percent | 40.5 |
| Aor | 1243.7 |
| Dp | -81 |
| Prat | 1162.7 |
Top 5 opponents most often played
| Type | # | Opponent | Games | White | Black | First tournament | Last tournament | Details |
| Overall | 1 | September, A (Ava-Louise) | 2 | 1 | 1 | Pedro Booyse Top Schools 2025 (U13 Girls) | Pedro Booyse Top Schools 2025 (U13 Girls) | Details |
| Overall | 2 | Tieties, P (Pearl) | 2 | 1 | 1 | Pedro Booyse Top Schools 2025 (U13 Girls) | Pedro Booyse Top Schools 2025 (U13 Girls) | Details |
| Overall | 3 | Kersouw, E (Emily) | 2 | 1 | 1 | Pedro Booyse Top Schools 2025 (U13 Girls) | Pedro Booyse Top Schools 2025 (U13 Girls) | Details |
| Rapid | 1 | September, A (Ava-Louise) | 2 | 1 | 1 | Pedro Booyse Top Schools 2025 (U13 Girls) | Pedro Booyse Top Schools 2025 (U13 Girls) | Details |
| Rapid | 2 | Tieties, P (Pearl) | 2 | 1 | 1 | Pedro Booyse Top Schools 2025 (U13 Girls) | Pedro Booyse Top Schools 2025 (U13 Girls) | Details |
| Rapid | 3 | Kersouw, E (Emily) | 2 | 1 | 1 | Pedro Booyse Top Schools 2025 (U13 Girls) | Pedro Booyse Top Schools 2025 (U13 Girls) | Details |