HSG Open 2025 - Group A

SwissStandard

122 players participated in this 6-round tournament, held from 20 Jun 2025 to 22 Jun 2025 in Hilversum, Netherlands. 30 titled players from 8 federations. Top 10 Elo average was 2407, and top seed was Benjamin Bok (🇳🇱 NED, GM, 2582).

Benjamin Bok (🇳🇱 NED, GM, 2582) won with 5.5/6, ahead of Nico Zwirs (5.5) and Yasin Sari (5.0). Bok shared the lead from round 1, winning on tie-break.

The biggest upset came in round 4: Lode De Jong (CM, 2108) beat Hing Ting Lai (IM, 2464), a +356-point gap.

Location

🇳🇱Hilversum, Netherlands

Dates

20 Jun 2025 → 22 Jun 2025

Time control

Standard: 110 minutes for game with 10 sec increment from move 1

System

Swiss · 6 rounds

Top seed

🇳🇱GMBenjamin Bok2582

Avg top 10

2,407

Participants

122

Titled players · 30

GM×2

IM×4

FM×19

CM×3

WIM×1

WFM×1

Federations · 8 represented

🇳🇱Netherlands×105

🇧🇪Belgium×4

FIDE (no federation)×2

🇹🇷Turkiye×2

Netherlands Antilles×2

🇮🇸Iceland×1

🇱🇺Luxembourg×1

🇩🇪Germany×1

Top 3

🥇
GMBenjamin Bok
🇳🇱NED·2582
5.5pts·2643perf+2.3
🥈
IMNico Zwirs
🇳🇱NED·2454
5.5pts·2517perf+2.3
🥉
FMYasin Sari
🇹🇷TUR·2318
5.0pts·2488perf+23.8

How it unfolded

Top 6 · 6 rounds

Tight race until R5; 2 players tied at 5.5/6, decided on Buchholz. Title race narrowed from 2 co-leaders at R4 to 2 at the finish.

Co-leaders

Bok5.5Zwirs5.5Sari5Arnold5Ritzerveld4.5Terlouw4.5

R5–R6 · LEAD HELD

GM Benjamin Bok held the sole lead from R5 through R6 without losing it.

R6 · TIEBREAK CLUSTER

2 players finish on 5.5/6. Bok takes the title on Buchholz Cut1 (20.0).

WIN STREAKS · 2 top finishers

GM Benjamin Bok 5 wins (R1–R5)IM Nico Zwirs 5 wins (R2–R6)

Key matchups · top 4

Head-to-head between the four finishers

Player	1	2	3	4
1GMBenjamin Bok	*	—	½	—
2IMNico Zwirs	—	*	—	—
3FMYasin Sari	½	—	*	—
4FMRhys Arnold	—	—	—	*

Grille américaine

#	Player	Elo	Fed	R1	R2	R3	R4	R5	R6	Pts	Bu C1	Bu	SB	Perf	Δ
1	Bok, BenjaminGM	2582	NED	+32B	+39N	+61B	+15N	+6B	=3N	5.5	20.0	22.5	20.00	2643	+2.3
2	Zwirs, NicoIM	2454	NED	=89N	+70B	+88N	+7B	+14N	+5B	5.5	17.5	19.5	18.50	2517	+2.3
3	Sari, YasinFM	2318	TUR	+60B	+115N	=5B	+9N	+16B	=1B	5.0	21.0	22.0	17.00	2488	+23.8
4	Arnold, RhysFM	2229	NED	=79N	+113B	+43B	=42N	+38N	+15B	5.0	15.0	16.0	13.50	2492	+26.6
5	De Jong, LodeCM	2108	NED	+119N	+25B	=3N	+17B	+31B	−2N	4.5	21.5	22.0	14.00	2481	+110.8
6	Ritzerveld, NoahFM	2298	NED	+91B	+33N	+67B	+8N	−1N	=11B	4.5	20.5	22.5	14.75	2403	+15.8
7	Groenewoud, Joel	2159	NED	+73B	+21N	=14B	−2N	+56N	+45B	4.5	19.5	22.0	14.50	2406	+66.5
8	Zhu, Chenwu	2188	NED	+49N	+82B	+17N	−6B	+23N	=10N	4.5	19.5	21.5	14.75	2370	+56.4
9	Klapwijk, Bram	2209	NED	=68N	+86B	+27N	−3B	+30N	+41B	4.5	17.5	19.5	13.25	2343	+20.4
10	Elgersma, OnnoFM	2393	NED	=24B	=78N	+40B	+47N	+39N	=8B	4.5	17.0	19.0	14.00	2291	-5.5
11	Terlouw, WouterFM	2196	NED	+105B	+23N	−38B	+63N	+42B	=6N	4.5	16.5	18.0	12.75	2294	+30.0
12	De Wit, TexFM	2296	NED	−23N	+84B	+58N	+18B	=29N	+57B	4.5	16.0	18.0	12.75	2252	-4.6
13	Madularea, DavidFM	2255	NED	+117N	+74B	−16N	+65B	=57N	+29B	4.5	15.0	16.0	10.75	2315	+17.6
14	Kumar, Prajit Sai	2223	NED	+52N	+18B	=7N	+41B	−2B	=21N	4.0	21.0	24.0	14.25	2397	+52.8
15	Labruyere, RogerFM	2276	NED	+102B	+57N	+63B	−1B	+34N	−4N	4.0	19.0	20.5	10.00	2315	+5.8
16	Grooten, HermanIM	2189	NED	+99B	+44N	+13B	F	−3N	+28N	4.0	17.5	17.5	12.50	2401	+13.5
17	Lai, Hing TingIM	2464	NED	+40B	+90N	−8B	−5N	+78B	+54N	4.0	17.0	19.0	10.00	2240	-13.1
18	Schroer, Marcel	2097	NED	+111B	−14N	+26B	−12N	+80B	+59N	4.0	16.5	18.0	9.50	2212	+18.4
19	Den Hartog, Marijn	2213	NED	+46B	−38N	+87B	=20N	=24B	+62N	4.0	16.0	18.0	11.25	2150	-9.0
20	Van Liempt, Michael	2101	NED	−44N	+49B	+82N	=19B	=59N	+48B	4.0	15.5	17.5	11.25	2163	+10.2
21	Pham, KhoiIM	2377	NED	+108N	−7B	=60N	+81B	+62N	=14B	4.0	15.5	17.0	9.25	2193	-21.8
22	Zwirs, Jasper	2119	NED	=62N	=58B	+120N	=28B	+66N	=25B	4.0	14.5	15.0	9.00	2223	+17.0
23	Van Arendonk, Polle	2032	NED	+12B	−11B	+25N	+90N	−8B	=47N	3.5	20.0	22.0	11.50	2259	+73.2
24	Maes, Djad	2037	NED	=10N	+45B	=55N	=59B	=19N	=27B	3.5	18.0	20.5	11.75	2302	+40.6
25	Mostertman, MilanFM	2231	NED	+87B	−5N	−23B	+86N	+46B	=22N	3.5	17.0	19.0	9.00	2098	-19.2
26	Aziz, Daniel	1947	NED	=27N	=65B	−18N	+79B	+60N	=36B	3.5	16.0	18.0	9.25	2101	+20.2
27	Hummel, Paul	2112	NED	=26B	+80N	−9B	=76N	+104B	=24N	3.5	16.0	17.5	8.25	2058	-7.4
28	Lombaers, PeterFM	2311	NED	=113N	+79B	=47B	=22N	+43N	−16B	3.5	16.0	17.0	9.00	2117	-24.8
29	Gijsen, William	2151	NED	=81B	+94N	=69B	+78N	=12B	−13N	3.5	15.5	17.5	8.50	2127	-2.8
30	Darie, Aden	1958	NED	=42B	=110N	=33B	+96N	−9B	+64N	3.5	15.5	17.0	8.50	2197	+76.8
31	Koster, RamonFM	2317	NED	F	+89B	+64N	+38B	−5N	=35B	3.5	15.5	15.5	9.25	2256	-6.4
32	Molenaar, Christiaan	2048	NED	−1N	=106B	−71N	+103B	+51B	+69N	3.5	15.0	16.5	7.75	2084	+4.0
33	Coenen, EduardCM	2157	NED	+103N	−6B	=30N	+100B	−41N	+58B	3.5	15.0	16.5	7.25	2168	+1.4
34	Van Helvoort, Rob	2069	NED	+83N	F	=59B	+61N	−15B	+50B	3.5	14.0	14.0	8.75	2300	+31.0
35	Stolwijk, Colin	2213	NED	+75N	−88B	+48N	F	+67B	=31N	3.5	13.5	13.5	9.75	2252	+5.6
36	Vos, Tjark	2171	AHO	+114B	−41N	−46B	+106N	+93B	=26N	3.5	13.0	14.0	6.25	2119	-8.0
37	Van Dijk, Eduard	1965	NED	−115B	−40N	=101B	+70N	+72B	+66B	3.5	12.0	13.0	8.25	2136	+54.8
38	De Vries, Leon	2053	NED	+107B	+19B	+11N	−31N	−4B	F	3.0	18.5	18.5	10.00	2222	+22.6
39	Iolis, Oleg	2186	BEL	+71B	−1B	+92N	+54N	−10B	F	3.0	17.5	17.5	7.50	2279	+10.6
40	Van t Hoff, Tom	2039	NED	−17N	+37B	−10N	=58B	=73N	+99B	3.0	17.0	18.5	7.50	2115	+8.2
41	Beerdsen, ThomasGM	2538	NED	+109N	+36B	F	−14N	+33B	−9N	3.0	17.0	17.0	8.50	2252	-14.7
42	Goudriaan, Rafael	2146	NED	=30N	+98B	+81N	=4B	−11N	F	3.0	17.0	17.0	8.25	2133	-0.8
43	Smid, Jelle	2120	NED	+122B	=55B	−4N	+71N	−28B	=76N	3.0	16.5	16.5	5.25	2111	-1.2
44	Alvares, Thomas	1942	NED	+20B	−16B	−45N	+102N	=63B	=67N	3.0	16.0	17.5	8.00	2139	+29.4
45	Van Meegen, RuudFM	2317	NED	F	−24N	+44B	+72N	+64B	−7N	3.0	16.0	16.0	8.00	2128	-21.2
46	Taylor, Tristan	1996	CAN	−19N	+83B	+36N	−57B	−25N	+81B	3.0	15.5	17.5	7.50	2100	+15.8
47	Jonsson, Gauti Pall	2123	ISL	F	+93B	=28N	−10B	+99N	=23B	3.0	15.0	15.0	7.00	2206	+10.8
48	Baarspul, Bram	2018	NED	+77B	−61N	−35B	+85N	+84B	−20N	3.0	14.5	16.5	6.50	2114	+29.6
49	Den Heijer, Rolinde	1980	NED	−8B	−20N	+111N	−50B	+109N	+110B	3.0	14.5	16.0	4.50	2103	+19.2
50	Van Batenburg, Mees	2218	NED	+53B	−63N	−78B	+49N	+97B	−34N	3.0	14.0	16.0	8.00	2020	-60.4
51	Koning, Milan	1889	NED	−88N	=52B	=79N	+53B	−32N	+92B	3.0	13.5	15.5	7.50	2027	+18.6
52	Gosman, Theo	2005	NED	−14B	=51N	−80B	=83N	+107B	+85N	3.0	13.0	14.5	6.00	1946	-9.8
53	Shklovskiy, Evgeny	2004	FID	−50N	+101B	−90B	−51N	+83B	+80N	3.0	12.0	13.5	5.50	2007	-0.2
54	Boeren, Jurriaan	2083	NED	=104N	=120B	+107N	−39B	+82N	−17B	3.0	12.0	12.5	4.50	2030	-9.2
55	Albers, SasaFM	2253	NED	+72B	=43N	=24B	F	F	+68N	3.0	11.5	11.5	8.25	2236	-1.4
56	Ponomarev, Ivan	1942	FID	F	−64N	+91B	+122N	−7B	+65B	3.0	11.5	11.5	4.50	2142	+53.2
57	Duson, RobinWIM	2141	NED	F	−15B	+85N	+46N	=13B	−12N	2.5	18.0	19.5	7.25	2155	+2.2
58	Ellenbroek, Ton	1951	NED	=64B	=22N	−12B	=40N	+71B	−33N	2.5	17.5	20.0	7.25	2060	+14.8
59	Wunnink, MichaelFM	2182	NED	F	+68B	=34N	=24N	=20B	−18B	2.5	17.5	17.5	8.00	2059	-16.4
60	Habig, Bryan	2036	NED	−3N	+103B	=21B	=80N	−26B	=97N	2.5	16.5	18.0	5.50	2027	-4.8
61	In t Veld, Daan	2194	NED	+84N	+48B	−1N	−34B	F	=86N	2.5	16.0	16.0	6.00	2126	-10.6
62	Dijk, Rogier	1950	NED	=22B	F	+74N	+110N	−21B	−19B	2.5	16.0	16.0	6.00	2189	+28.6
63	Heinisch, Niklas	2091	GER	+101N	+50B	−15N	−11B	=44N	F	2.5	16.0	16.0	6.00	2114	+5.6
64	Thijssen, Freek	2122	NED	=58N	+56B	−31B	+68N	−45N	−30B	2.5	15.5	18.0	6.75	2023	-33.6
65	Becx, CesarFM	2087	NED	=80B	=26N	+104B	−13N	=69B	−56N	2.5	15.5	17.0	5.50	1932	-25.6
66	Bakija, Alan	2229	NED	+92B	−67N	=72B	+69N	−22B	−37N	2.5	15.0	17.0	5.75	1967	-81.6
67	Hommes, Elmar	2106	NED	+112B	+66B	−6N	F	−35N	=44B	2.5	15.0	15.0	5.50	2125	+2.8
68	Knol, Daniel	1993	NED	=9B	−59N	+95N	−64B	+100N	−55B	2.5	14.5	16.0	5.75	2085	+13.0
69	Cordes, Jule	1925	NED	=70N	+116B	=29N	−66B	=65N	−32B	2.5	14.5	15.5	5.25	2055	+18.8
70	Taams, Lisanne	2078	NED	=69B	−2N	−99N	−37B	+119N	+105B	2.5	14.5	15.0	3.25	1986	-17.6
71	Feng, Elysia	1970	NED	−39N	=121N	+32B	−43B	−58N	+102B	2.5	13.5	14.0	5.25	2011	+11.2
72	Mulder, Bart-Piet	2022	NED	−55N	+119B	=66N	−45B	−37N	+100B	2.5	13.5	14.0	3.25	2054	+2.4
73	Garay, Enzo	1964	NED	−7N	+108B	−110B	=116N	=40B	=78N	2.5	12.5	13.5	4.50	2019	+15.6
74	Ten Dam, BramFM	2137	NED	+85B	−13N	−62B	+114N	=76B	F	2.5	12.5	12.5	4.25	2015	-29.6
75	Schleipfenbauer, Bent	2003	NED	−35B	F	−100N	+95B	=81N	+82B	2.5	11.0	11.0	5.00	2030	+3.4
76	De Wit, Evan	1951	NED	F	F	+113N	=27B	=74N	=43B	2.5	10.0	10.0	5.50	2196	+51.6
77	Grooten, Tommy	2244	NED	−48N	=99B	F	F	+101B	+84N	2.5	8.0	8.0	4.25	2074	-31.6
78	Winter, Sven	2013	NED	F	=10B	+50N	−29B	−17N	=73B	2.0	17.5	17.5	6.50	2156	+28.4
79	Smeenk, Merijn	0	NED	=4B	−28N	=51B	−26N	−85B	+120N	2.0	17.0	17.5	4.50	1916	0.0
80	Warnaar, Alisha	1934	NED	=65N	−27B	+52N	=60B	−18N	−53B	2.0	16.0	18.5	5.50	1932	-0.2
81	Kroon, Ivo	1960	NED	=29N	+95B	−42B	−21N	=75B	−46N	2.0	16.0	18.0	5.00	2006	+4.8
82	Leentjens, Gilbert	1892	NED	+121B	−8N	−20B	+105N	−54B	−75N	2.0	15.5	16.0	2.00	1948	+7.8
83	Ulbrich, Luis Roberto	1885	BRA	−34B	−46N	=103N	=52B	−53N	+114B	2.0	14.0	15.0	3.25	1876	-2.8
84	Smit, Manuel	1982	NED	−61B	−12N	+122B	+107N	−48N	−77B	2.0	14.0	14.0	1.50	1958	-5.6
85	Geboers, Jimmy	1951	BEL	−74N	+102N	−57B	−48B	+79N	−52B	2.0	13.0	14.5	3.50	1826	-14.6
86	Basinas, Konstantinos	1981	LUX	F	−9N	=96B	−25B	+121N	=61B	2.0	13.0	13.0	2.75	2087	+12.8
87	Van Opstal, RurikCM	2012	AHO	−25N	+112B	−19N	F	−98B	+101N	2.0	12.5	12.5	3.00	1986	-4.4
88	Bekkink, Sereyo	2073	NED	+51B	+35N	−2B	F	F	F	2.0	12.0	12.0	6.50	2310	+17.2
89	Edwardss, Dylan	2038	NED	=2B	−31N	=114B	+94N	F	F	2.0	12.0	12.0	5.25	2173	+11.2
90	Zecha, Oscar	2180	NED	+106N	−17B	+53N	−23B	F	F	2.0	12.0	12.0	4.50	2117	-14.4
91	Uddin, Ahnaf Tajwar	2033	NED	−6N	=100B	−56N	F	+114B	=93N	2.0	12.0	12.0	2.75	1952	-24.0
92	De Zoeten, Cato	2005	NED	−66N	+111B	−39B	−104N	+120B	−51N	2.0	11.5	12.0	2.00	1890	-19.0
93	Gergin, Isafara	1956	NED	=118B	−47N	+108B	F	−36N	=91B	2.0	11.0	11.0	3.00	2028	+18.0
94	Van Coppenolle, Lander	1968	BEL	F	−29B	=109N	−89B	=102N	+108N	2.0	10.0	10.0	3.00	1988	+5.2
95	Van Coppenolle, Kurt	2128	BEL	F	−81N	−68B	−75N	+103B	+104N	2.0	10.0	10.0	3.00	1898	-31.0
96	Van den Berg, Jeroen	2085	NED	F	F	=86N	−30B	=105N	+106B	2.0	8.5	8.5	3.25	1974	-12.2
97	Winnubst, Paul	1962	NED	F	=118N	F	+109B	−50N	=60B	2.0	8.0	8.0	3.25	2109	+30.0
98	Bakels, Anton	1964	NED	F	−42N	+121B	F	+87N	F	2.0	5.5	5.5	2.50	2203	+19.2
99	Beijen, Mark	1980	NED	−16N	=77N	+70B	F	−47B	−40N	1.5	15.0	15.0	3.75	1986	-0.2
100	Kools, Jasper	1957	NED	F	=91N	+75B	−33N	−68B	−72N	1.5	13.5	15.5	3.50	1893	-8.8
101	Garau, Francesca	1937	ITA	−63B	−53N	=37N	+113B	−77N	−87B	1.5	13.5	14.5	2.75	1866	-11.4
102	Van der Lubben, Arno	2028	NED	−15N	−85B	+119N	−44B	=94B	−71N	1.5	13.5	14.0	1.50	1816	-33.8
103	Galje, Hans	1963	NED	−33B	−60N	=83B	−32N	−95N	+122B	1.5	13.5	13.5	1.00	1841	-18.8
104	Piel, Ruben	1930	NED	=54B	F	−65N	+92B	−27N	−95B	1.5	13.0	13.0	3.50	1934	+0.2
105	Ten Kate, Gustav	1986	NED	−11N	−107B	+112N	−82B	=96B	−70N	1.5	12.5	14.0	2.50	1805	-56.0
106	Westerhof, Fleur	1969	NED	−90B	=32N	=116N	−36B	=108B	−96N	1.5	12.5	13.5	3.00	1907	-18.4
107	Van Haaften, Jelle	1794	NED	−38N	+105N	−54B	−84B	−52N	=113B	1.5	12.5	13.5	2.00	1831	+8.8
108	Gortemaker, Lucas	2037	NED	−21B	−73N	−93N	+112B	=106N	−94B	1.5	12.0	13.5	2.25	1837	-33.0
109	Margaryan, Artur	2045	ARM	−41B	=114N	=94B	−97N	−49B	=112N	1.5	11.5	12.5	2.25	1852	-32.8
110	Tabak, StefanFM	2124	NED	F	=30B	+73N	−62B	F	−49N	1.5	11.5	11.5	4.25	1876	-27.0
111	Katpatal, Akshaj	1941	NED	−18N	−92N	−49B	=119B	+113N	F	1.5	10.5	11.0	1.25	1863	-20.4
112	Schoffelmeer, Jetse	1945	NED	−67N	−87N	−105B	−108N	+122B	=109B	1.5	9.0	9.0	0.75	1830	-17.2
113	Heijmans, Stan	2035	NED	=28B	−4N	−76B	−101N	−111B	=107N	1.0	14.0	15.5	2.50	1754	-84.0
114	Markus, John Raymond	1968	NED	−36N	=109B	=89N	−74B	−91N	−83N	1.0	12.0	13.5	1.75	1779	-26.6
115	Heemskerk, WimFM	2168	NED	+37N	−3B	F	F	F	F	1.0	8.5	8.5	3.50	2142	-1.2
116	Verheul, Job	2081	NED	F	−69N	=106B	=73B	F	F	1.0	6.5	6.5	2.00	1828	-20.4
117	Looijer, Dave	2028	NED	−13B	+122N	F	F	F	F	1.0	4.5	4.5	0.00	2103	+3.6
118	Cornelisse, LoreleiWFM	2138	NED	=93N	=97B	F	F	F	F	1.0	4.0	4.0	2.00	1959	-9.4
119	Bhawsar, Ashwath	1945	NED	−5B	−72N	−102B	=111N	−70B	F	0.5	12.5	12.5	0.75	1669	-55.6
120	Aslan, Cagla Yaren	1916	TUR	F	=54N	−22B	F	−92N	−79B	0.5	11.0	11.0	1.50	1796	-8.0
121	Overeem, MarcFM	2075	NED	−82N	=71B	−98N	F	−86B	F	0.5	10.0	10.0	1.25	1630	-43.2
122	Klapwijk, Leo	1950	NED	−43N	−117B	−84N	−56B	−112N	−103N	0.0	11.0	12.0	0.00	1197	-52.6

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers

1De Jong, LodeCMNED
+110.8
4.5 pts · #11
2Darie, AdenNED
+76.8
3.5 pts · #31
3Van Arendonk, PolleNED
+73.2
3.5 pts · #29

Top rating losers

1Heijmans, StanNED
-84.0
1.0 pts · #118
2Bakija, AlanNED
-81.6
2.5 pts · #77
3Van Batenburg, MeesNED
-60.4
3.0 pts · #46

Biggest upsets

R4+356 Elo gap
CMDe Jong, Lode2108 beat IMLai, Hing Ting2464
R6+329 Elo gap
Klapwijk, Bram2209 beat GMBeerdsen, Thomas2538
R4+315 Elo gap
Kumar, Prajit Sai2223 beat GMBeerdsen, Thomas2538