CChessStats

Bundesturnier Sen-2

Open SwissStandard

23 players participated in this 5-round tournament, held from 14 May 2026 to 17 May 2026 in Basel, Switzerland. 4 federations represented. Top 10 Elo average was 1690, and top seed was Slavoljub Andjelkovic (🇨🇭 SUI, 1730).

Jean-Louis Mackels (🇫🇷 FRA, 1713) won with 5.0/5, ahead of Slavoljub Andjelkovic (4.5) and Nicolas Thomas (3.5). Mackels won solo starting round 4.

The biggest upset came in round 5: Franz Both (1555) beat Werner Koch (1717), a +162-point gap.

Location
🇨🇭Basel, Switzerland
Dates
14 May 2026 → 17 May 2026
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Swiss · 5 rounds
Top seed
🇨🇭Slavoljub Andjelkovic1730
Avg top 10
1,690
Participants
23
Federations · 4 represented
🇨🇭Switzerland×20
🇫🇷France×1
🇱🇮Liechtenstein×1
🇩🇪Germany×1
Top 3

How it unfolded

Top 6 · 5 rounds

Jean-Louis Mackels led from R4; +0.5-point edge over the runner-up.

Co-leaders
8
4
2
1
1
1.52.545R1R2R3R4R5
R4–R5 · LEAD HELD

Jean-Louis Mackels held the sole lead from R4 through R5 without losing it.

R1–R5 · WIN STREAK

Jean-Louis Mackels won 5 in a row (R1–R5).

Key matchups · top 4

Head-to-head between the four finishers
Player1234
1Jean-Louis Mackels*—
1
—
2Slavoljub Andjelkovic—*—
1
3Nicolas Thomas
0
—*—
4Heinz Laska—
0
—*

Grille américaine

#PlayerEloFedR1R2R3R4R5PtsBu C1BuSBPerfΔ
1Mackels, Jean-Louis1713FRA+14B+10N+3B+4N+9B5.011.514.014.002446+32.8
2Andjelkovic, Slavoljub1730SUI+13B+15N=9B+8N+5B4.510.512.511.252004+27.4
3Thomas, Nicolas1657SUI=18N+11B−1N+12B+4B3.513.014.58.751716+12.4
4Dinerchtein, Boris0SUI+20B+7N+5B−1B−3N3.014.515.57.0016970.0
5Laska, Heinz1712SUI+12N+6B−4N+15B−2N3.013.015.07.501825+11.4
6Klaus, Ortwin1610SUI+23B−5N=8B=11B+17N3.010.010.55.001674+18.0
7Corbat, Philippe (19925)1699SUI=16N−4B=18N+22B+20N3.07.58.53.751737+3.6
8Winter, Martin1534SUI=11N+16B=6N−2B=10B2.512.514.56.001644+28.8
9Zimmermann, Stefan SUI1711SUIF+17B=2N+20B−1N2.512.512.55.251754+4.2
10Stalder, Heinz1631SUI+21N−1B=12N=17B=8N2.512.013.04.501577-7.2
11Frey, Rudolf1699GER=8B−3N+14B=6N=13B2.511.514.06.501597-14.0
12Both, Franz1555SUI−5B+23N=10B−3N+19B2.510.511.03.251638+11.0
13Meier, Herbert1600SUI−2N=22B=16N+21B=11N2.510.011.03.751596-0.4
14Halm, Bruno1585SUI−1N+21B−11N=18B+23N2.510.010.52.251579-0.8
15Schaedler, Gerold Heinz1631LIE+22B−2B=17N−5N=16B2.011.512.53.001545-11.8
16Rothenfluh, Marcel1550SUI=7B−8N=13B=19N=15N2.010.011.54.501564+1.6
17Schuler, Agatha1588SUI+19B−9N=15B=10N−6B2.010.011.53.751588-0.2
18Wipf, Armin1516SUI=3B−19N=7B=14N−21N1.510.511.54.501481-4.8
19Koch, Werner1717SUI−17N+18B−20N=16B−12N1.58.09.02.501414-40.2
20Birbaum, Hans1604SUI−4NF+19B−9N−7B1.010.010.01.501584-1.4
21Filli, Claude1494SUI−10B−14NF−13N+18B1.09.09.01.501390-21.2
22Egli, Arnold1507SUI−15N=13N=23B−7NF1.08.08.01.501408-9.8
23Koeppel, Paul1475SUI−6N−12B=22NF−14B0.59.09.00.501242-40.8

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets
Bundesturnier Sen-2 (2026) — Basel, Switzerland | Chess Tournament Results | ChessStats