SonFlow Cup - Kolding Bymesterskab 2026 - 1

SwissStandard

12 players participated in this 5-round tournament, held from 17 Apr 2026 to 19 Apr 2026 in Kolding, Denmark. 12 titled players from 3 federations. Top 10 Elo average was 2385, and top seed was Boris Chatalbashev (🇩🇰 DEN, GM, 2535).

Jakob Leon Pajeken (🇩🇪 GER, IM, 2452) won with 4.0/5, ahead of Boris Chatalbashev (3.5) and Daniel Kopylov (3.0). Pajeken broke clear in the final round.

The biggest upset came in round 5: Martin Matthiesen (FM, 2275) beat Boris Chatalbashev (GM, 2535), a +260-point gap.

Location

🇩🇰Kolding, Denmark

Dates

17 Apr 2026 → 19 Apr 2026

Time control

Standard: 90min/40moves+30min/end+30sec increment per move starting from move 1

System

Swiss · 5 rounds

Top seed

🇩🇰GMBoris Chatalbashev2535

Avg top 10

2,385

Participants

Titled players · 12

GM×3

IM×5

FM×4

Federations · 3 represented

🇩🇰Denmark×7

🇩🇪Germany×4

🇺🇦Ukraine×1

Top 3

🥇
IMJakob Leon Pajeken
🇩🇪GER·2452
4.0pts·2647perf+12.0
🥈
GMBoris Chatalbashev
🇩🇰DEN·2535
3.5pts·2520perf-0.6
🥉
IMDaniel Kopylov
🇩🇪GER·2434
3.0pts·2472perf+2.8

How it unfolded

Top 6 · 5 rounds

IM Jakob Leon Pajeken led from R5; +0.5-point edge over the runner-up. Title race converged from 2 co-leaders at R4 to 1 by R5.

Co-leaders

Pajeken4Chatalbashev3.5Skytte3Matthiesen3Kopylov3Yankelevich3

R5–R5 · LEAD HELD

IM Jakob Leon Pajeken held the sole lead from R5 through R5 without losing it.

R3 · HEAD-TO-HEAD · WINNER VS 2ND

IM Jakob Leon Pajeken drew with GM Boris Chatalbashev (White).

R1–R5 · UNBEATEN

IM Jakob Leon Pajeken went unbeaten across 5 games (R1–R5).

Key matchups · top 4

Head-to-head between the four finishers

Player	1	2	3	4
1IMJakob Leon Pajeken	*	½	—	—
2GMBoris Chatalbashev	½	*	1	0
3IMRasmus Skytte	—	0	*	½
4FMMartin Matthiesen	—	1	½	*

Grille américaine

#	Player	Elo	Fed	R1	R2	R3	R4	R5	Pts	Bu C1	Bu	SB	Perf	Δ
1	Pajeken, Jakob LeonIM	2452	GER	+9B	+4N	=2B	+8N	=3B	4.0	11.5	13.5	10.25	2647	+12.0
2	Chatalbashev, BorisGM	2535	DEN	+10N	+3B	=1N	+6B	−5N	3.5	13.0	15.0	10.00	2520	-0.6
3	Kopylov, DanielIM	2434	GER	+12B	−2N	+5B	=4N	=1N	3.0	13.5	13.5	6.50	2472	+2.8
4	Yankelevich, LevGM	2451	GER	+7N	−1B	=6N	=3B	+10N	3.0	12.5	14.5	7.50	2449	0.0
5	Matthiesen, MartinFM	2275	DEN	=6N	+8B	−3N	=10B	+2B	3.0	11.5	13.5	8.00	2461	+24.6
6	Skytte, RasmusIM	2350	DEN	=5B	+11N	=4B	−2N	+9B	3.0	11.5	13.5	7.00	2462	+7.7
7	Jalving, AugustFM	2307	DEN	−4B	−9N	+12B	=11N	+8B	2.5	9.0	9.0	3.00	2342	+4.8
8	Fries-Nielsen, Jens OveIM	2284	DEN	+11B	−5N	+9B	−1B	−7N	2.0	11.5	13.5	4.00	2273	-0.9
9	Ramsdal, Jens AlbertFM	2333	DEN	−1N	+7B	−8N	+12B	−6N	2.0	11.5	11.5	2.50	2264	-5.0
10	Kopylov, MichaelIM	2343	UKR	−2B	+12N	=11B	=5N	−4B	2.0	11.5	11.5	2.50	2309	-2.5
11	Arndt, MagnusFM	2358	GER	−8N	−6B	=10N	=7B	+12N	2.0	9.5	9.5	2.25	2242	-8.0
12	Hoi, CarstenGM	2285	DEN	−3N	−10B	−7N	−9N	−11B	0.0	9.5	11.5	0.00	1555	-20.2

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers

1Matthiesen, MartinFMDEN
+24.6
3.0 pts · #4
2Pajeken, Jakob LeonIMGER
+12.0
4.0 pts · #1
3Skytte, RasmusIMDEN
+7.7
3.0 pts · #3

Top rating losers

1Hoi, CarstenGMDEN
-20.2
0.0 pts · #12
2Arndt, MagnusFMGER
-8.0
2.0 pts · #8
3Ramsdal, Jens AlbertFMDEN
-5.0
2.0 pts · #9

Biggest upsets

R5+260 Elo gap
FMMatthiesen, Martin2275 beat GMChatalbashev, Boris2535