PLAYER PAGE
Pieter Bosman
1140321401Sedibeng (GSV)Personal
Main rating
| Rating | 1242.3 |
| K-factor | 36 |
| Floor | 858.6 |
| Highest | 1417.5 (2025-09-30) |
| Min/Max +/- allowed | 122 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 1119.1 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1242.3 |
| K-factor | 36 |
| Floor | 858.6 |
| Highest | 1417.5 (2025-09-30) |
| Min/Max +/- allowed | 121.6 |
Standard rating
| Rating | 1259.8 |
| K-factor | 36 |
| Floor | 878.6 |
| Highest | 1424.4 (2025-09-30) |
| Min/Max +/- allowed | 120.4 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 1135.8 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1259.8 |
| K-factor | 36 |
| Floor | 878.6 |
| Highest | 1424.4 (2025-09-30) |
| Min/Max +/- allowed | 120.4 |
Rapid rating
| Rating | 1199.6 |
| K-factor | 36 |
| Floor | 700 |
| Highest | 1200 (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 | 1199.6 |
| K-factor | 36 |
| Floor | 700 |
| Highest | 1200 (2025-06-01) |
| Min/Max +/- allowed | 165.8 |
Blitz rating
| Rating | 1255.5 |
| K-factor | 36 |
| Floor | 755.5 |
| Highest | 1255.5 (2025-07-01) |
| Min/Max +/- allowed | 153.2 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 0 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1255.5 |
| K-factor | 36 |
| Floor | 755.5 |
| Highest | 1255.5 (2025-07-01) |
| Min/Max +/- allowed | 153.2 |
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 | D7 Sedibeng East Individuals League 2026 (U12+U13 Boys) | Standard | 2026-05-23 | 2026-05-23 | Sedibeng (GSV) | 5 | 1249.7 | 4 | 2 | 1196.3 | -7.4 | Details |
| 2 | Chess-in-the-Vaal Open 18 April 2026 (E) | Standard | 2026-04-18 | 2026-04-18 | Sedibeng (GSV) | 5 | 1261.4 | 5 | 2 | 1187.9 | -11.7 | Details |
| 3 | Gauteng Inter-Region at Emerald Resort 2025 (U12 Candidates) | Standard | 2025-12-06 | 2025-12-07 | Sedibeng (GSV) | 5 | 1298 | 4 | 1 | 1046.2 | -20.7 | Details |
| 4 | 2025 Gauteng Schools Provincial Individual Chess Championship (U11 Boys) | Standard | 2025-09-27 | 2025-09-27 | Tshwane (GTP) | 5 | 1417 | 5 | 2 | 1238.6 | -16.6 | Details |
| 5 | 2025 Super 8 (Senior) | Rapid | 2025-09-26 | 2025-09-26 | Ekurhuleni (GE) | 7 | 1417 | 7 | 3.5 | 1238.8 | -16.7 | Details |
| 6 | Sedibeng Chess Open 06 Sept 2025 (E) | Standard | 2025-09-06 | 2025-09-06 | Sedibeng (GSV) | 5 | 1404.4 | 5 | 3 | 1459.8 | 4.8 | Details |
| 7 | GDE (D7) Sedibeng East Schools 2025 (U13) | Standard | 2025-08-02 | 2025-08-02 | Sedibeng (GSV) | 5 | 1289.7 | 5 | 5 | 1624.2 | 33.5 | Details |
| 8 | Eureka Chess Open 26 July 2025 (G) | Standard | 2025-07-26 | 2025-07-26 | Sedibeng (GSV) | 5 | 1293.1 | 5 | 2 | 1267.2 | -1.8 | Details |
| 9 | HS Driehoek Chess Open 2025 (E) | Standard | 2025-06-14 | 2025-06-14 | Sedibeng (GSV) | 5 | 1254.5 | 5 | 3 | 1402.6 | 13.8 | Details |
| 10 | Vaal Chess Club Blitz Open 31 May 2025 (B) | Blitz | 2025-05-31 | 2025-05-31 | Sedibeng (GSV) | 7 | 1254.5 | 7 | 5 | 1439.2 | 7.7 | Details |
| 11 | GDE Sedibeng East Schools - D7 Individuals 24 May 2025 (U11 Boys) | Standard | 2025-05-24 | 2025-05-24 | Sedibeng (GSV) | 5 | 1200 | 5 | 4 | 1472.3 | 27.2 | 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 | 9 |
| Wins | 4 |
| Draws | 0 |
| Losses | 5 |
| White | 4 |
| Black | 5 |
| White wins | 1 |
| Black wins | 3 |
| Score | 4 |
| Percent | 44.4 |
| Dp | -47.2 |
| AOR | 1238.9 |
| Performance | 1191.6 |
Game statistics (History)
| Games | 57 |
| Wins | 31 |
| Draws | 3 |
| Losses | 23 |
| White | 25 |
| Black | 32 |
| White wins | 14 |
| Black wins | 17 |
| Score | 32.5 |
| Percent | 57 |
| Dp | 59.6 |
| AOR | 1273.3 |
| Performance | 1333 |
Rankings (Main)
| National | |
| Overall | 9586 |
| Gender | 7676 |
| Age group | 1602 |
| Gender/Age | 1170 |
| Provincial | |
| Overall | 3315 |
| Gender | 2626 |
| Age group | 548 |
| Gender/Age | 397 |
| Regional | |
| Overall | 400 |
| Gender | 325 |
| Age group | 85 |
| Gender/Age | 65 |
Rankings (Standard)
| National | |
| Overall | 7272 |
| Gender | 5796 |
| Age group | 1176 |
| Gender/Age | 846 |
| Provincial | |
| Overall | 2632 |
| Gender | 2093 |
| Age group | 431 |
| Gender/Age | 318 |
| Regional | |
| Overall | 315 |
| Gender | 257 |
| Age group | 63 |
| Gender/Age | 49 |
Rankings (Rapid)
| 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 (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 | 9 |
| Score | 4 |
| Percent | 44.4 |
| Aor | 1238.9 |
| Dp | -47.2 |
| Prat | 1191.6 |
Performance (12 months)
| Games | 35 |
| Score | 18.5 |
| Percent | 52.9 |
| Aor | 1267 |
| Dp | 24.3 |
| Prat | 1291.3 |
Performance (History)
| Games | 57 |
| Score | 32.5 |
| Percent | 57 |
| Aor | 1273.3 |
| Dp | 59.6 |
| Prat | 1333 |
Top 5 opponents most often played
| Type | # | Opponent | Games | White | Black | First tournament | Last tournament | Details |
| Overall | 1 | Nobete, G (Gomolemo) | 3 | 2 | 1 | HS Driehoek Chess Open 2025 (E) | Sedibeng Chess Open 06 Sept 2025 (E) | Details |
| Overall | 2 | Mehlomakulu, MT (Mpendulo) | 2 | 1 | 1 | GDE Sedibeng East Schools - D7 Individuals 24 May 2025 (U11 Boys) | Eureka Chess Open 26 July 2025 (G) | Details |
| Overall | 3 | Mohokare, R (Rorisang) | 2 | 1 | 1 | Vaal Chess Club Blitz Open 31 May 2025 (B) | Eureka Chess Open 26 July 2025 (G) | Details |
| Overall | 4 | Conradie, LP (Lianro Pierre) | 2 | 1 | 1 | Eureka Chess Open 26 July 2025 (G) | Sedibeng Chess Open 06 Sept 2025 (E) | Details |
| Overall | 5 | Rosslee, SJ (Stephanus Johannes (Hanu)) | 2 | 0 | 2 | GDE Sedibeng East Schools - D7 Individuals 24 May 2025 (U11 Boys) | D7 Sedibeng East Individuals League 2026 (U12+U13 Boys) | Details |
| Standard | 1 | Nobete, G (Gomolemo) | 3 | 2 | 1 | HS Driehoek Chess Open 2025 (E) | Sedibeng Chess Open 06 Sept 2025 (E) | Details |
| Standard | 2 | Du Toit, M (Monika) | 2 | 1 | 1 | HS Driehoek Chess Open 2025 (E) | Eureka Chess Open 26 July 2025 (G) | Details |
| Standard | 3 | Rosslee, SJ (Stephanus Johannes (Hanu)) | 2 | 0 | 2 | GDE Sedibeng East Schools - D7 Individuals 24 May 2025 (U11 Boys) | D7 Sedibeng East Individuals League 2026 (U12+U13 Boys) | Details |
| Standard | 4 | Conradie, LP (Lianro Pierre) | 2 | 1 | 1 | Eureka Chess Open 26 July 2025 (G) | Sedibeng Chess Open 06 Sept 2025 (E) | Details |
| Standard | 5 | Mehlomakulu, MT (Mpendulo) | 2 | 1 | 1 | GDE Sedibeng East Schools - D7 Individuals 24 May 2025 (U11 Boys) | Eureka Chess Open 26 July 2025 (G) | Details |