CChessStats

2026 AHS Open Chess Tournament (A)

Open SwissStandard

20 players participated in this 5-round tournament, held on 28 Feb 2026 in Pretoria, South Africa. 2 federations represented. Top 10 Elo average was 1696, and top seed was Erikson Roberto Mauricio Soares (🇦🇴 ANG, IM, 2130).

Zander Nicolaas Slabbert (🇿🇦 RSA, 1676) won with 3.0/5, ahead of Johann Terblanche (3.0) and Lesedi Mmakou (3.0).

The biggest upset came in round 3: Nathan Marais (1545) beat Anton Schultz (1683), a +138-point gap.

Location
🇿🇦Pretoria, South Africa
Dates
28 Feb 2026
Time control
Standard: 50 minutes with 10 seconds increment from move 1
System
Swiss · 5 rounds
Avg top 10
1,696
Participants
20
Federations · 2 represented
🇿🇦South Africa×18
🇿🇲Zambia×1
Top 3

How it unfolded

Top 6 · 5 rounds

Tight race until R5; 5 players tied at 3.0/5, decided on Buchholz. Title race narrowed from 3 co-leaders at R4 to 2 at the finish.

Co-leaders
12
4
1
3
2
1.52.545R1R2R3R4R5
R5 · TIEBREAK CLUSTER

5 players finish on 3.0/5. Slabbert takes the title on Buchholz Cut1 (8.0).

R3 · LATE SURGE

Johann Terblanche was #17 at R3, climbed to #1 over the final stretch.

Key matchups · top 4

Head-to-head between the four finishers
Player1234
1Johann Terblanche*
2Michael Bain*
3Zander Nicolaas Slabbert*
0
4Lesedi Mmakou
1
*

Grille américaine

#PlayerEloFedR1R2R3R4R5PtsBu C1BuSBPerfΔ
1Slabbert, Zander Nicolaas1676RSA+18N?B3N+13B+11N3.08.08.05.001731+7.2
2Terblanche, Johann1663RSA?N+13B11N+17B+14N3.07.07.05.001846+35.2
3Mmakou, Lesedi1635RSA?B+20N+1B+6B?N3.05.55.55.502517+49.2
4Rautenbach, Helen Christine1701RSA+20B=?N?B=7N+12B3.04.54.53.251786+10.4
5Bain, Michael1676RSA=?B=19N+15B+12N?B3.04.04.03.751892+31.6
6Severin, Martin1756RSA+13N?B+8B3N=7B2.510.010.05.751733-2.0
7Mcphail, Ryan1699RSA?N+16B=9N=4B=6N2.59.59.55.501772+31.6
8Mkotong, Boipelo1698RSA+16N=?B6N9B+17N2.57.57.52.501674-2.6
9Schutte, Rico1692RSA+12B?N=7B+8N?B2.57.07.05.751901+15.0
10Smit, Yoshua1720RSA11B?N+16B+15N=?B2.55.05.03.0017220.0
11Grobler, Johannes Theodo1588RSA+10N14B+2B?N1B2.010.510.55.501709+13.0
12Marais, Nathan1545RSA9N+17B+19N5B4N2.09.510.01.501606+11.2
13Van der Westhuizen, Lihan1606RSA6B2N+20B1N+18B2.09.59.51.00902-43.2
14Gondwe Prosper1643ZAM+15B+11N?B?N2B2.06.56.53.501750-0.8
15Rishworth, Justin James1616RSA14N+18B5N10B=16N1.59.010.01.751362-22.6
16Khumalo, Siyabonga Samuel Khutso1579RSA8B7N10N+19B=15B1.59.09.51.251519-18.0
17Boshoff, Reinhardt1604RSA?B12N+18B2N8B1.08.58.51.00845-63.6
18FIDE 53400005401B15N17N+20B13N1.07.57.50.008420.0
19Schultz, Anton1683RSA?N=5B12B16NF0.56.56.51.501334-52.4
20Janse Van Rensburg, Josh0RSA4N3B13N18NF0.09.09.00.008370.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets
2026 AHS Open Chess Tournament (A) — Pretoria, South Africa | Chess Tournament Results | ChessStats