PLAYER PAGE
Willem Duursema
1110316415Tshwane (GTP)Personal
Main rating
| Rating | 1348.7 |
| K-factor | 36 |
| Floor | 875.5 |
| Highest | 1375.5 (2025-08-01) |
| Min/Max +/- allowed | 129 |
| Rating Change () | |
| Games | 10 |
| Score | 5 |
| We | 5.01 |
| SWe | -0.01 |
| Temp +/- | -0.4 |
| Penalties | 0 |
| Weight perform | 1310.2 |
| Final +/- | -0.4 |
| New Rating () | |
| Rating | 1348.3 |
| K-factor | 36 |
| Floor | 875.5 |
| Highest | 1375.5 (2025-08-01) |
| Min/Max +/- allowed | 129.1 |
Standard rating
| Rating | 1347.8 |
| K-factor | 36 |
| Floor | 878.1 |
| Highest | 1378.1 (2025-08-01) |
| Min/Max +/- allowed | 128.7 |
| Rating Change () | |
| Games | 10 |
| Score | 5 |
| We | 5.08 |
| SWe | -0.08 |
| Temp +/- | -2.9 |
| Penalties | 0 |
| Weight perform | 1310.2 |
| Final +/- | -2.9 |
| New Rating () | |
| Rating | 1344.8 |
| K-factor | 36 |
| Floor | 878.1 |
| Highest | 1378.1 (2025-08-01) |
| Min/Max +/- allowed | 128.7 |
Rapid 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 |
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 |
| 1 | 2026 KSNG Open Chess Tournament (C) | Standard | 2026-04-18 | 2026-04-18 | Tshwane (GTP) | 5 | 1348.7 | 5 | 1 | 1146.2 | -34.4 | Details |
| 2 | 2026 D3 Tshwane North School Cluster 4&5 Individuals (U15 Mixed) | Standard | 2026-04-11 | 2026-04-11 | Tshwane (GTP) | 5 | 1348.7 | 5 | 4 | 1548.8 | 34 | Details |
| # | Tournament | Type | Start | End | Host | Rounds | Rating | Games | Score | Perform | Rat+/- | Details |
| 1 | 2026 Silver Lakes Open Chess Tournament (C) | Standard | 2026-03-07 | 2026-03-07 | Tshwane (GTP) | 5 | 1338.1 | 5 | 2.5 | 1392.1 | 10.6 | Details |
| 2 | 2026 Tshwane Chess Registration Tournament (C1) | Standard | 2026-01-31 | 2026-01-31 | Tshwane (GTP) | 5 | 1358.6 | 4 | 1 | 1213.8 | -11.3 | Details |
| 3 | 2025 Laerskool Doringkloof Primary Open Chess Tournament (C) | Standard | 2025-10-25 | 2025-10-25 | Tshwane (GTP) | 5 | 1367.1 | 5 | 2.5 | 1325.3 | -4.8 | Details |
| 4 | 2025 Tshwane North District CLOSED Team Championships (D3) (U15 Open) | Standard | 2025-08-16 | 2025-08-16 | Tshwane (GTP) | 5 | 1375.5 | 5 | 3 | 1318.9 | -4.6 | Details |
| 5 | 2025 Tshwane North School District Cluster 4 & 5 Team League (D3) (U15) | Standard | 2025-07-26 | 2025-07-26 | Tshwane (GTP) | 5 | 1351.4 | 4 | 3 | 1422.2 | 5.6 | Details |
| 6 | 2025 Jacaranda Round Robin Open Chess Tournament (K) | Standard | 2025-06-21 | 2025-06-21 | Tshwane (GTP) | 5 | 1295.8 | 5 | 4 | 1524.4 | 21.6 | Details |
| 7 | 2025 Elise Steenkamp Open Chess Tournament (Rook) | Standard | 2025-06-14 | 2025-06-16 | Tshwane (GTP) | 7 | 1295.8 | 7 | 3 | 1208.3 | -14.3 | Details |
| 8 | 2025 Tshwane North School District CLOSED Individual Chess Championship (U15 Open) | Standard | 2025-05-24 | 2025-05-24 | Tshwane (GTP) | 5 | 1223.6 | 4 | 2 | 1382.4 | 10.8 | Details |
| 9 | 2025 Tshwane North School District CLOSED Individual Championships Cluster 4&5 (U15 Open) | Standard | 2025-05-10 | 2025-05-10 | Tshwane (GTP) | 5 | 1223.6 | 5 | 3 | 1294 | 6.1 | Details |
| 10 | 2025 Silver Lakes Chess Club Open Chess Tournament (D) | Standard | 2025-05-03 | 2025-05-03 | Tshwane (GTP) | 5 | 1223.6 | 4 | 2 | 1256.5 | 2.5 | Details |
| 11 | 2025 Mid Gauteng Open Chess Tournament (D) | Standard | 2025-04-12 | 2025-04-12 | Tshwane (GTP) | 5 | 1199.8 | 5 | 3 | 1314.8 | 12 | Details |
| 12 | 2025 KSNG Open (D) | Standard | 2025-02-22 | 2025-02-22 | Tshwane (GTP) | 5 | 1200 | 5 | 2 | 1129.3 | -6.1 | Details |
Game statistics ( )
| Games | 10 |
| Wins | 5 |
| Draws | 0 |
| Losses | 5 |
| White | 5 |
| Black | 5 |
| White wins | 4 |
| Black wins | 1 |
| Score | 5 |
| Percent | 50 |
| Dp | 0 |
| AOR | 1347.5 |
| Performance | 1347.5 |
Game statistics ()
| Games | 19 |
| Wins | 8 |
| Draws | 1 |
| Losses | 10 |
| White | 9 |
| Black | 10 |
| White wins | 6 |
| Black wins | 2 |
| Score | 8.5 |
| Percent | 44.7 |
| Dp | -44.7 |
| AOR | 1375.8 |
| Performance | 1331.1 |
Game statistics (History)
| Games | 68 |
| Wins | 34 |
| Draws | 4 |
| Losses | 30 |
| White | 34 |
| Black | 34 |
| White wins | 19 |
| Black wins | 15 |
| Score | 36 |
| Percent | 52.9 |
| Dp | 25 |
| AOR | 1291.6 |
| Performance | 1316.6 |
Rankings (Main)
| National | |
| Overall | 4609 |
| Gender | 3843 |
| Age group | 725 |
| Gender/Age | 562 |
| Provincial | |
| Overall | 1531 |
| Gender | 1281 |
| Age group | 244 |
| Gender/Age | 187 |
| Regional | |
| Overall | 531 |
| Gender | 433 |
| Age group | 86 |
| Gender/Age | 66 |
Rankings (Standard)
| National | |
| Overall | 4199 |
| Gender | 3492 |
| Age group | 660 |
| Gender/Age | 513 |
| Provincial | |
| Overall | 1480 |
| Gender | 1239 |
| Age group | 246 |
| Gender/Age | 191 |
| Regional | |
| Overall | 546 |
| Gender | 448 |
| Age group | 93 |
| Gender/Age | 73 |
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 | 10 |
| Score | 5 |
| Percent | 50 |
| Aor | 1347.5 |
| Dp | 0 |
| Prat | 1347.5 |
Performance ()
| Games | 19 |
| Score | 8.5 |
| Percent | 44.7 |
| Aor | 1375.8 |
| Dp | -44.7 |
| Prat | 1331.1 |
Performance (12 months)
| Games | 58 |
| Score | 31 |
| Percent | 53.4 |
| Aor | 1303.6 |
| Dp | 29.3 |
| Prat | 1332.9 |
Performance (History)
| Games | 68 |
| Score | 36 |
| Percent | 52.9 |
| Aor | 1291.6 |
| Dp | 25 |
| Prat | 1316.6 |
Top 5 opponents most often played
| Type | # | Opponent | Games | White | Black | First tournament | Last tournament | Details |
| Overall | 1 | Ngwana, T (Thapelo Jurie Junior) | 2 | 2 | 0 | 2025 Tshwane North School District CLOSED Individual Championships Cluster 4&5 (U15 Open) | 2025 Tshwane North School District CLOSED Individual Chess Championship (U15 Open) | Details |
| Overall | 2 | Potgieter, W (Wilmari) | 2 | 0 | 2 | 2025 Tshwane North School District Cluster 4 & 5 Team League (D3) (U15) | 2025 Tshwane North District CLOSED Team Championships (D3) (U15 Open) | Details |
| Standard | 1 | Ngwana, T (Thapelo Jurie Junior) | 2 | 2 | 0 | 2025 Tshwane North School District CLOSED Individual Championships Cluster 4&5 (U15 Open) | 2025 Tshwane North School District CLOSED Individual Chess Championship (U15 Open) | Details |
| Standard | 2 | Potgieter, W (Wilmari) | 2 | 0 | 2 | 2025 Tshwane North School District Cluster 4 & 5 Team League (D3) (U15) | 2025 Tshwane North District CLOSED Team Championships (D3) (U15 Open) | Details |