Cape Town Open Chess Championship 2026 (Advanced)
Open SwissStandard
25 players participated in this 6-round tournament, held from 12 Jun 2026 to 15 Jun 2026 in Cape Town, South Africa. 2 federations represented. Top 10 Elo average was 1711, and top seed was Benjamin Dubbeld (🇿🇦 RSA, 1735).
Aleks Guo (🇿🇦 RSA, 1649) won with 6.0/6, ahead of Mohammed Zayan Khan (5.0) and Cecil Ohlson (4.5). Guo won solo starting round 4.
The biggest upset came in round 2: Asanda Vengeni (1612) beat Roland C. Willenberg (1730), a +118-point gap.
Location
🇿🇦Cape Town, South Africa
Dates
12 Jun 2026 → 15 Jun 2026
Time control
Standard: 90 minutes for game with 10 sec increment from move 1
System
Swiss · 6 rounds
Federations · 2 represented
🇿🇦South Africa×24
FIDE (no federation)×1
Top 3
- 🥇
- 🥈
- 🥉
How it unfolded
Top 6 · 6 roundsAleks Guo led from R4; +1.0-point edge over the runner-up.
Co-leaders
11
5
2
1
1
1
R4–R6 · LEAD HELD
Aleks Guo never relinquished the lead after R4; final gap +1.0 over the runner-up.
WIN STREAKS · 2 top finishers
Aleks Guo 6 wins (R1–R6)Mohammed Zayan Khan 3 wins (R4–R6)
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1Aleks Guo | * | — | 1 | 1 |
| 2Mohammed Zayan Khan | — | * | — | — |
| 3Sphamandla Thal Siwela | 0 | — | * | ½ |
| 4Cecil Ohlson | 0 | — | ½ | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | R6 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Guo, Aleks | 1649 | RSA | +20N | +12B | +6N | +5B | +4N | +3B | 6.0 | 19.5 | 21.0 | 21.00 | 2505 | +115.6 |
| 2 | Khan, Mohammed Zayan | 1688 | RSA | +22N | +9B | −5N | +12B | +7N | +6B | 5.0 | 17.5 | 18.5 | 14.50 | 1911 | +56.0 |
| 3 | Ohlson, Cecil | 1704 | RSA | +18N | +13B | =4N | +7B | +5N | −1N | 4.5 | 21.0 | 23.0 | 14.75 | 1842 | +20.6 |
| 4 | Siwela, Sphamandla Thal | 1691 | RSA | +24B | +15N | =3B | +8N | −1B | +11N | 4.5 | 20.0 | 20.5 | 12.25 | 1870 | +55.6 |
| 5 | Budge, Daniel | 1690 | RSA | +21B | +19N | +2B | −1N | −3B | +15N | 4.0 | 20.0 | 21.5 | 11.00 | 1787 | +15.4 |
| 6 | Moja, Malesela | 0 | RSA | +11B | =14N | −1B | +24N | +15B | −2N | 3.5 | 20.0 | 20.5 | 8.00 | 1679 | 0.0 |
| 7 | Vengeni, Asanda | 1612 | RSA | =8B | +10N | +14B | −3N | −2B | +16N | 3.5 | 19.5 | 22.0 | 10.75 | 1743 | +44.8 |
| 8 | Mthethwa, Nkanyiso | 1720 | RSA | =7N | =20B | +13N | −4B | =12N | +17B | 3.5 | 16.5 | 18.0 | 9.50 | 1726 | +1.2 |
| 9 | Dubbeld, Benjamin | 1735 | RSA | +25B | −2N | −16B | +22N | +13B | =10N | 3.5 | 15.0 | 15.0 | 5.75 | 1709 | -7.6 |
| 10 | Willenberg, Roland C. | 1730 | RSA | −13N | −7B | +18N | +23B | +16N | =9B | 3.5 | 14.5 | 15.5 | 7.25 | 1701 | -4.0 |
| 11 | Van Der Spuy, Albert | 1661 | RSA | −6N | +18B | =24N | +20B | +17N | −4B | 3.5 | 14.0 | 14.5 | 6.25 | 1813 | +41.2 |
| 12 | November, Byron | 1708 | RSA | +16B | −1N | +19B | −2N | =8B | =14N | 3.0 | 20.0 | 22.0 | 7.75 | 1655 | -17.6 |
| 13 | Booley, Sayed Ridha | 1619 | RSA | +10B | −3N | −8B | +19N | −9N | +22B | 3.0 | 17.0 | 18.0 | 6.50 | 1683 | +21.2 |
| 14 | Maruma, Kamogelo | 1630 | RSA | +23N | =6B | −7N | −17B | +20N | =12B | 3.0 | 14.0 | 15.0 | 5.75 | 1664 | +9.2 |
| 15 | Hibbins, Graeme | 1710 | RSA | +17N | −4B | +23N | =16B | −6N | −5B | 2.5 | 17.0 | 18.0 | 4.75 | 1659 | -14.0 |
| 16 | Mbilini, Hlomla | 1646 | RSA | −12N | +22B | +9N | =15N | −10B | −7B | 2.5 | 16.0 | 17.0 | 5.75 | 1628 | -7.2 |
| 17 | November, Edwin J. | 1651 | RSA | −15B | =21N | +25B | +14N | −11B | −8N | 2.5 | 14.0 | 14.0 | 3.75 | 1604 | -8.4 |
| 18 | Mansfield-Scaddan, Sefton | 1633 | RSA | −3B | −11N | −10B | +21N | −19B | +20B | 2.0 | 15.0 | 16.5 | 3.00 | 1550 | -13.2 |
| 19 | Shelton, Brian | 1595 | RSA | F | −5B | −12N | −13B | +18N | +23N | 2.0 | 13.0 | 13.0 | 3.00 | 1582 | -2.2 |
| 20 | Galleid, Stephen | 1730 | RSA | −1B | =8N | +21B | −11N | −14B | −18N | 1.5 | 18.0 | 19.5 | 3.25 | 1460 | -42.6 |
| 21 | Solomon, Aubrey | 1627 | RSA | −5N | =17B | −20N | −18B | F | +25N | 1.5 | 10.0 | 10.0 | 1.25 | 1515 | -15.0 |
| 22 | Jenkins, Tauriq | 1612 | RSA | −2B | −16N | F | −9B | +25N | −13N | 1.0 | 14.0 | 14.0 | 0.00 | 1421 | -23.2 |
| 23 | Green, Lyndon | 1619 | RSA | −14B | +25N | −15B | −10N | F | −19B | 1.0 | 11.5 | 11.5 | 0.00 | 1416 | -49.6 |
| 24 | Maxwell, Tristan | 1616 | RSA | −4N | F | =11B | −6B | F | F | 0.5 | 12.5 | 12.5 | 1.75 | 1483 | -13.6 |
| 25 | Whyatt, Benjamin | 1616 | FID | −9N | −23B | −17N | F | −22B | −21B | 0.0 | 9.5 | 9.5 | 0.00 | 849 | -91.2 |
Key insights
Biggest movers and upsets — the story behind the numbers.
Top rating gainers
- 1Guo, AleksRSA+115.66.0 pts · #1
- 2Khan, Mohammed ZayanRSA+56.05.0 pts · #5
- 3Siwela, Sphamandla ThalRSA+55.64.5 pts · #2
Top rating losers
- 1Whyatt, BenjaminFID-91.20.0 pts · #25
- 2Green, LyndonRSA-49.61.0 pts · #23
- 3Galleid, StephenRSA-42.61.5 pts · #21
Biggest upsets
- R2+118 Elo gap
- R1+111 Elo gap