Dutch Open Championship 2025

SwissStandard

62 players participated in this 9-round tournament, held from 22 Jul 2025 to 30 Jul 2025 in Dieren, Netherlands. 31 titled players from 8 federations. Top 10 Elo average was 2430, and top seed was Thomas Beerdsen (🇳🇱 NED, GM, 2512).

Eelke De Boer (🇳🇱 NED, IM, 2434) won with 7.0/9, ahead of Oleg Korneev (6.5) and Daniel Hausrath (6.5). De Boer shared the lead from round 7 and won solo starting round 8.

The biggest upset came in round 1: Tom Dordevic (2145) beat Nick Maatman (IM, 2408), a +263-point gap.

Location

🇳🇱Dieren, Netherlands

Dates

22 Jul 2025 → 30 Jul 2025

Time control

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

System

Swiss · 9 rounds

Top seed

🇳🇱GMThomas Beerdsen2512

Avg top 10

2,430

Participants

Titled players · 31

GM×5

IM×3

FM×17

CM×5

WFM×1

Federations · 8 represented

🇳🇱Netherlands×43

🇩🇪Germany×10

🇧🇪Belgium×4

🇺🇦Ukraine×1

Netherlands Antilles×1

🇫🇷France×1

🇮🇳India×1

🇪🇸Spain×1

Top 3

🥇
IMEelke De Boer
🇳🇱NED·2434
7.0pts·2536perf+11.9
🥈
GMOleg Korneev
🇪🇸ESP·2468
6.5pts·2481perf+2.7
🥉
GMDaniel Hausrath
🇩🇪GER·2440
6.5pts·2487perf+5.8

How it unfolded

Top 6 · 9 rounds

IM Eelke De Boer led from R8; +0.5-point edge over the runner-up. Title race converged from 3 co-leaders at R4 to 1 by R8.

Co-leaders

De Boer7Elgersma6.5Beerdsen6.5Flom6.5Korneev6.5Hausrath6.5— ex-leaders:Hausrathled R6, #11

R8 · LEADER CHANGE29 Jul

IM Eelke De Boer takes the sole lead (6.5/8).

R8 · HEAD-TO-HEAD · WINNER VS 2ND

IM Eelke De Boer beat FM Onno Elgersma (Black).

R1–R9 · UNBEATEN

IM Eelke De Boer went unbeaten across 9 games (R1–R9).

Key matchups · top 4

Head-to-head between the four finishers

Player	1	2	3	4
1IMEelke De Boer	*	1	1	—
2FMOnno Elgersma	0	*	—	1
3GMThomas Beerdsen	0	—	*	—
4GMGabriel Flom	—	0	—	*

Grille américaine

#	Player	Elo	Fed	R1	R2	R3	R4	R5	R6	R7	R8	R9	Pts	Bu C1	Bu	SB	Perf	Δ
1	De Boer, EelkeIM	2434	NED	+40B	=38N	+30B	=37N	+9B	=2N	+5B	+4N	=3B	7.0	44.5	48.5	38.00	2536	+11.9
2	Korneev, OlegGM	2468	ESP	+35N	+39B	+10N	=11B	=13N	=1B	=3B	=8N	+15B	6.5	46.5	50.5	35.25	2481	+2.7
3	Hausrath, DanielGM	2440	GER	+53N	+22B	+17N	=5B	=11N	+19B	=2N	=7B	=1N	6.5	46.5	49.5	33.75	2487	+5.8
4	Elgersma, OnnoFM	2388	NED	=31N	+18B	=12N	+32B	=37N	+11B	+6N	−1B	+7N	6.5	44.5	48.5	34.50	2467	+10.1
5	Beerdsen, ThomasGM	2512	NED	+41N	=12B	+23N	=3N	=20B	+37B	−1N	+14B	+11N	6.5	44.0	48.0	32.50	2465	-3.6
6	Flom, GabrielGM	2455	FRA	+32B	=37N	+38B	=29N	+15B	=7N	−4B	+23N	+12B	6.5	41.5	45.5	31.75	2433	-1.3
7	Maatman, NickIM	2408	NED	−17N	+60B	+31N	+22B	+39N	=6B	+13N	=3N	−4B	6.0	43.5	45.0	27.00	2409	+1.5
8	Reuter, Julian-Frank	2162	GER	−13N	+47B	+43N	=12B	=34N	+39B	+18N	=2B	=14N	6.0	40.5	44.0	27.50	2399	+55.0
9	Nemegeer, ArneFM	2258	BEL	+47N	=48B	+21N	=13B	−1N	=45B	+41N	=19B	+16N	6.0	38.5	41.5	26.00	2307	+13.0
10	Van Roon, SjoerdFM	2270	NED	+26B	+44N	−2B	−16N	=40B	=51N	+30B	+38N	+18B	6.0	37.5	40.5	25.50	2310	+10.2
11	Baselmans, LuukFM	2390	NED	+54B	+19N	+16B	=2N	=3B	−4N	=12B	+35N	−5B	5.5	46.0	48.5	26.25	2384	+0.4
12	Albers, SasaFM	2252	NED	+56B	=5N	=4B	=8N	+16B	=29N	=11N	+13B	−6N	5.5	46.0	48.0	27.00	2405	+36.6
13	Leenhouts, KoenGM	2476	NED	+8B	+24N	=29B	=9N	=2B	+20N	−7B	−12N	+35B	5.5	44.5	49.0	29.00	2363	-11.4
14	Kurt, SaschaFM	2303	NED	+25B	−16N	+54B	−19N	+32B	+30N	+38B	−5N	=8B	5.5	40.5	43.0	23.50	2288	-2.8
15	Lont, AddyFM	2269	NED	+60N	−17B	+46N	+25B	−6N	=41B	+21N	+22B	−2N	5.5	40.5	42.0	22.00	2295	+6.6
16	Vos, Tjark	2175	AHO	+57N	+14B	−11N	+10B	−12N	−18B	+27N	+34B	−9B	5.0	43.0	44.5	22.50	2290	+27.4
17	Dordevic, Tom	2145	GER	+7B	+15N	−3B	−20N	=24B	+40N	−23N	=39B	+37N	5.0	41.0	45.0	24.00	2315	+78.8
18	Eckardt, Joshua	2259	GER	−44B	−4N	+47B	+26N	+54B	+16N	−8B	+20N	−10N	5.0	40.5	43.0	21.00	2226	-8.2
19	Panjer, SidneyFM	2200	GER	+36N	−11B	+52N	+14B	+29B	−3N	=20B	=9N	F	5.0	40.5	40.5	23.00	2355	+32.8
20	Labruyere, RogerFM	2282	NED	+43N	=21B	=48N	+17B	=5N	−13B	=19N	−18B	+41N	5.0	40.0	43.0	22.75	2258	-5.0
21	Dinanath, HrdyaCM	2167	NED	+49B	=20N	−9B	=38N	=33B	+24N	−15B	+45N	=23B	5.0	38.5	41.5	20.75	2202	+16.3
22	Lutze, Max	2201	GER	+45B	−3N	+56B	−7N	=51B	+33N	+29B	−15N	=24B	5.0	38.5	40.5	18.50	2243	+16.0
23	Schmitz, Philipp	2205	GER	=50B	+33N	−5B	=51N	+57B	=35N	+17B	−6B	=21N	5.0	38.0	39.5	18.75	2208	-0.4
24	Vandenhole, KobeFM	2249	BEL	+58N	−13B	−25N	+43B	=17N	−21B	+52N	+44B	=22N	5.0	36.0	37.5	17.00	2200	-22.8
25	Jakhari, Ansh	2110	NED	−14N	+59B	+24B	−15N	−38B	=57N	+33B	+29N	=32B	5.0	35.0	36.5	18.50	2204	+44.0
26	Bus, TomCM	2083	NED	−10N	−27B	+59N	−18B	+46N	=36B	=54N	+42B	+39N	5.0	34.5	36.0	16.50	2202	+28.2
27	Grooten, HermanIM	2198	NED	−33B	+26N	=51B	−45N	+55B	=31N	−16B	+52N	+48B	5.0	31.5	34.0	17.25	2095	-12.1
28	Van t Hoff, Tom	2047	NED	−37B	=40N	=50B	−54N	+47B	=32N	=42B	+58N	+38B	5.0	29.5	31.0	16.75	2178	+31.6
29	Schuricht, Emil FrederickFM	2307	GER	+61N	+42B	=13N	=6B	−19N	=12B	−22N	−25B	+44N	4.5	40.0	41.0	17.25	2231	-17.6
30	Vortmeier, Jan	2197	GER	+59N	=34B	−1N	+31B	=45N	−14B	−10N	+43B	=36N	4.5	39.5	41.0	16.25	2176	-16.8
31	Ten Dam, BramFM	2139	NED	=4B	+50N	−7B	−30N	+42N	=27B	=39N	=37B	=34N	4.5	38.5	41.5	19.00	2245	+49.2
32	Duijker, RickFM	2158	NED	−6N	+58B	+57B	−4N	−14N	=28B	=36N	+49B	=25N	4.5	37.5	39.0	13.25	2141	-5.4
33	Den Heijer, Rolinde	1999	NED	+27N	−23B	+42N	−39B	=21N	−22B	−25N	+46B	+49N	4.5	36.5	39.5	18.00	2155	+36.2
34	Ritzerveld, NoahFM	2327	NED	+46B	=30N	−37B	+48N	=8B	−38N	+45B	−16N	=31B	4.5	35.0	38.0	17.50	2133	-43.2
35	Wink, LukaCM	2161	NED	−2B	F	+62N	+56N	+48B	=23B	+37N	−11B	−13N	4.5	32.5	32.5	12.50	2264	+41.2
36	De Wit, Evan	2003	NED	−19B	−46N	+53N	−40B	+56B	=26N	=32B	+54N	=30B	4.5	32.0	34.0	14.50	2100	+39.6
37	Madularea, DavidFM	2218	NED	+28N	=6B	+34N	=1B	=4B	−5N	−35B	=31N	−17B	4.0	45.5	50.0	21.75	2247	+10.6
38	Kazarjan, GachaturFM	2202	NED	+62N	=1B	−6N	=21B	+25N	+34B	−14N	−10B	−28N	4.0	44.5	45.5	16.50	2195	-4.6
39	Kumar, Prajit Sai	2231	NED	+51B	−2N	+44B	+33N	−7B	−8N	=31B	=17N	−26B	4.0	41.0	44.0	15.75	2126	-47.9
40	Grooten, Tommy	2149	NED	−1N	=28B	=45B	+36N	=10N	−17B	−44N	+57B	=43N	4.0	38.5	40.0	15.25	2074	-36.1
41	Zecha, Oscar	2166	NED	−5B	−56N	+58B	+50N	+49B	=15N	−9B	=48N	−20B	4.0	34.0	35.5	11.75	2104	-29.6
42	Van der Poel, HenkFM	2194	NED	+55B	−29N	−33B	=44N	−31B	+46B	=28N	−26N	+54B	4.0	33.0	35.5	12.75	2058	-32.2
43	Van Kuijk, Vadim	2087	NED	−20B	+49N	−8B	−24N	+62B	=48N	+57B	−30N	=40B	4.0	32.0	33.0	9.00	2059	-6.8
44	Van den Berg, Jeroen	2073	NED	+18N	−10B	−39N	=42B	F	+55N	+40B	−24N	−29B	3.5	35.0	35.0	13.50	2162	+17.0
45	Bruggink, Tycho	2027	NED	−22N	+61B	=40N	+27B	=30B	=9N	−34N	−21B	F	3.5	35.0	35.0	13.25	2161	+26.6
46	Blok, Michiel	2137	NED	−34N	+36B	−15B	=55N	−26B	−42N	+47B	−33N	+58N	3.5	34.0	35.5	10.75	2028	-27.2
47	Trunz, MichelleWFM	2067	GER	−9B	−8N	−18N	+59B	−28N	=58B	−46N	+56B	+57N	3.5	30.5	32.0	5.75	2024	-22.8
48	Elferink, Leon	1923	NED	F	=9N	=20B	−34B	−35N	=43B	+56N	=41B	−27N	3.0	35.0	35.0	11.50	2105	+61.2
49	Blok, Xaveer	1941	NED	−21N	−43B	+60N	+53B	−41N	−52B	+50B	−32N	−33B	3.0	31.0	32.5	7.50	1904	-14.4
50	Aravindhan, AchyuthCM	2031	NED	=23N	−31B	=28N	−41B	−52N	+61B	−49N	−53B	+59N	3.0	29.0	30.0	7.50	2001	-12.1
51	Aditya Kunal PatilCM	2047	IND	−39N	+53B	=27N	=23B	=22N	=10B	F	F	F	3.0	28.0	28.0	13.50	2151	+25.6
52	Boeren, Jurriaan	2096	NED	F	+55N	−19B	−57N	+50B	+49N	−24B	−27B	−53N	3.0	28.0	28.0	8.50	2031	-13.0
53	De Boer, Klaas	0	NED	−3B	−51N	−36B	−49N	F	−56N	+55B	+50N	+52B	3.0	27.5	27.5	8.50	1987	0.0
54	Evengroen, Jan	2144	NED	−11N	+62B	−14N	+28B	−18N	F	=26B	−36B	−42N	2.5	35.5	35.5	8.50	2022	-26.2
55	Khatniuk, Anastasiia	1980	UKR	−42N	−52B	+61N	=46B	−27N	−44B	−53N	−59B	+56N	2.5	25.5	26.5	4.75	1967	-2.8
56	Drugmand, Benoit	2057	BEL	−12N	+41B	−22N	−35B	−36N	+53B	−48B	−47N	−55B	2.0	33.0	35.5	7.00	1773	-104.8
57	Gergin, Isafara	1968	NED	−16B	F	−32N	+52B	−23N	=25B	−43N	−40N	−47B	1.5	34.0	34.0	5.50	1880	-31.2
58	Breuker, Dennis	2054	NED	−24B	−32N	−41N	=61B	=59N	=47N	F	−28B	−46B	1.5	28.5	29.5	3.00	1865	-36.8
59	Roebers, Bregje	1994	NED	−30B	−25N	−26B	−47N	=58B	−60N	F	+55N	−50B	1.5	26.5	26.5	3.25	1826	-47.0
60	Wouters, Casper	2075	NED	−15B	−7N	−49B	−62N	=61N	+59B	F	F	F	1.5	19.5	19.5	2.00	1933	-23.6
61	Govoreanu, Matei	2113	BEL	−29B	−45N	−55B	=58N	=60B	−50N	F	F	F	1.0	16.5	16.5	1.50	1806	-91.6
62	Taams, Lisanne	2028	NED	−38B	−54N	−35B	+60B	−43N	F	F	F	F	1.0	16.5	16.5	1.50	1894	-15.6

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers

1Dordevic, TomGER
+78.8
5.0 pts · #25
2Elferink, LeonNED
+61.2
3.0 pts · #50
3Reuter, Julian-FrankGER
+55.0
6.0 pts · #6

Top rating losers

1Drugmand, BenoitBEL
-104.8
2.0 pts · #60
2Govoreanu, MateiBEL
-91.6
1.0 pts · #61
3Kumar, Prajit SaiNED
-47.9
4.0 pts · #36

Biggest upsets

R1+263 Elo gap
Dordevic, Tom2145 beat IMMaatman, Nick2408
R8+224 Elo gap
FMAlbers, Sasa2252 beat GMLeenhouts, Koen2476
R1+199 Elo gap
Den Heijer, Rolinde1999 beat IMGrooten, Herman2198