CChessStats

2025 Midstream Open Chess Tournament (A)

Open SwissStandard

14 players participated in this 5-round tournament, held on 23 Aug 2025 in Centurion, South Africa. 2 federations represented. Top 10 Elo average was 1803, and top seed was Calvin Nicholas Jacobs (🇿🇦 RSA, 2081).

Calvin Nicholas Jacobs (🇿🇦 RSA, 2081) won with 5.0/5, ahead of Juan-Louis Combrink (3.5) and Bafana Nhlapo (3.0). Jacobs won solo starting round 4.

The biggest upset came in round 1: Ryan Mcphail (1623) beat Ashley Urombo (1839), a +216-point gap.

Location
🇿🇦Centurion, South Africa
Dates
23 Aug 2025
Time control
Standard: All Moves in 55 Min. Incr. 5 Sec. / /
System
Swiss · 5 rounds
Top seed
🇿🇦Calvin Nicholas Jacobs2081
Avg top 10
1,803
Participants
14
Federations · 2 represented
🇿🇦South Africa×13
🇿🇲Zambia×1
Top 3

How it unfolded

Top 6 · 5 rounds

Calvin Nicholas Jacobs led from R4; +1.5-point edge over the runner-up.

Co-leaders
6
2
2
1
1
1.52.545R1R2R3R4R5
Jacobs5Combrink3.5Urombo3Nhlapo3Liang2.5Egeonu2.5
R4–R5 · LEAD HELD

Calvin Nicholas Jacobs never relinquished the lead after R4; final gap +1.5 over the runner-up.

R4 · HEAD-TO-HEAD · WINNER VS 2ND

Calvin Nicholas Jacobs beat Juan-Louis Combrink (White).

WIN STREAKS · 2 top finishers

Calvin Nicholas Jacobs 5 wins (R1–R5)Juan-Louis Combrink 3 wins (R1–R3)

Key matchups · top 4

Head-to-head between the four finishers
Player1234
1Calvin Nicholas Jacobs*
1
——
2Juan-Louis Combrink
0
*—
1
3Ashley Urombo——*—
4Bafana Nhlapo—
0
—*

Grille américaine

#PlayerEloFedR1R2R3R4R5PtsBu C1BuSBPerfΔ
1Jacobs, Calvin Nicholas2081RSA+8B+12N+6N+2B+5N5.010.512.012.002622+40.4
2Combrink, Juan-Louis1845RSA+10B+3N+12B−1N=6N3.512.514.07.751970+34.8
3Nhlapo, Bafana1552RSA+14N−2B+7N−5B+9B3.010.511.55.501787+62.0
4Urombo, Ashley1839RSA−9N=5N+8B=12B+11N3.08.510.06.001758-20.4
5Liang, Bowie1740RSA=11N=4B=9B+3N−1B2.513.015.06.501737-3.2
6Egeonu, Chigozie2047RSA+7NF−1B+10N=2B2.513.015.06.251907-21.2
7Myburgh, Jacques1674RSA−6B+13N−3B=9N+10B2.59.511.04.5016910.0
8Gondwe Prosper1686ZAM−1N=11B−4N+14B=13N2.011.512.52.751688-4.4
9Mcphail, Ryan1623RSA+4BF=5N=7B−3N2.011.013.55.501701+16.4
10Thorulsley, Kairaav1634RSA−2N+14B+11N−6B−7N2.010.511.53.001695+10.8
11Du Toit, Stephanus1597RSA=5B=8N−10B+13N−4B2.09.511.03.751627+8.4
12Makhosonke, Kuhlase Matthiolus1791RSA+13B−1B−2N=4N−14B1.513.014.03.001662-18.2
13Brits, Etienne1599RSA−12N−7B+14N−11B=8B1.58.09.02.001538-16.4
14Goncalves, Emilio1697RSA−3B−10N−13B−8N+12N1.08.510.01.501412-70.8

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets