2026 Chess.com Botwinnik Open - Groep B

Open SwissStandard

74 players participated in this 6-round tournament, held from 02 Jan 2026 to 04 Jan 2026 in Zoetermeer, Netherlands. 6 federations represented. Top 10 Elo average was 2007, and top seed was Jonse De Jong (🇳🇱 NED, 2111).

Pieter Molendijk (🇳🇱 NED, 1989) won with 5.5/6, ahead of Anastasiia Khatniuk (5.0) and Tobias Li-Behn (5.0). Molendijk clinched sole first place in the final round.

The biggest upset came in round 3: Paul Van der Pas (1731) beat Jonse De Jong (2111), a +380-point gap.

Location

🇳🇱Zoetermeer, Netherlands

Dates

02 Jan 2026 → 04 Jan 2026

Time control

Standard: 90 minutes with 30 second increment from move 1

System

Swiss · 6 rounds

Top seed

🇳🇱Jonse De Jong2111

Avg top 10

2,007

Participants

Federations · 6 represented

🇳🇱Netherlands×67

🇲🇩Moldova×1

🇺🇦Ukraine×1

🇬🇧England×1

FIDE (no federation)×1

🇺🇸United States of America×1

Top 3

🥇
Pieter Molendijk
🇳🇱NED·1989
5.5pts·2258perf+60.4
🥈
Anastasiia Khatniuk
🇺🇦UKR·1987
5.0pts·2135perf+18.2
🥉
Tobias Li-Behn
🇳🇱NED·2002
5.0pts·2163perf+22.4

How it unfolded

Top 6 · 6 rounds

Pieter Molendijk led from R6; +0.5-point edge over the runner-up. Title race converged from 2 co-leaders at R4 to 1 by R6.

Co-leaders

Molendijk5.5Li-Behn5Khatniuk5Gupta4.5Van der Hoek4.5Kanters4.5

R6 · LEADER CHANGE04 Jan

Pieter Molendijk takes the sole lead (5.5/6).

R6 · HEAD-TO-HEAD · WINNER VS 2ND

Pieter Molendijk beat Tobias Li-Behn (Black).

WIN STREAKS · 3 top finishers

Pieter Molendijk 5 wins (R2–R6)Tobias Li-Behn 5 wins (R1–R5)Anastasiia Khatniuk 4 wins (R1–R4)

Key matchups · top 4

Head-to-head between the four finishers

Player	1	2	3	4
1Pieter Molendijk	*	1	—	—
2Tobias Li-Behn	0	*	1	—
3Anastasiia Khatniuk	—	0	*	1
4Akul Gupta	—	—	0	*

Grille américaine

#	Player	Elo	Fed	R1	R2	R3	R4	R5	R6	Pts	Bu C1	Bu	SB	Perf	Δ
1	Molendijk, Pieter	1989	NED	=46N	+39B	+49B	+4N	+22B	+3N	5.5	18.0	20.0	18.75	2258	+60.4
2	Khatniuk, Anastasiia	1987	UKR	+24B	+58N	+9B	+5N	−3B	+19N	5.0	21.0	22.5	17.50	2135	+18.2
3	Li-Behn, Tobias	2002	NED	+63N	+45B	+30N	+8B	+2N	−1B	5.0	20.0	21.5	16.00	2163	+22.4
4	Van der Hoek, Sam	1773	NED	+32B	=29B	+18N	−1B	+33N	+25N	4.5	19.0	22.0	15.00	2152	+58.8
5	Gupta, Akul	1952	NED	+41B	+34N	+23B	−2B	+31N	=7B	4.5	19.0	21.5	14.25	2072	+35.3
6	Beijen, Mark	1921	NED	−50N	+59B	+13N	=17B	+39N	+22B	4.5	16.0	17.5	13.50	1974	+7.6
7	Kanters, Cor	1979	NED	+66B	=28N	=27B	+51N	+35B	=5N	4.5	15.5	16.5	11.25	2067	+12.8
8	Kakrana, Reyansh	1895	NED	+21N	+37B	+50B	−3N	=12B	=20N	4.0	20.0	22.0	13.00	1942	+12.8
9	Sewpal, Indy	1794	NED	+67N	+14B	−2N	=11B	=16N	+29B	4.0	20.0	21.0	12.00	2054	+83.2
10	Lee, Jungmin	1855	NED	+17N	+18B	=22B	=25N	=15B	=11N	4.0	19.5	23.0	15.50	1991	+22.0
11	Middelkoop, Arno	1988	NED	+12B	=27N	=28B	=9N	+23N	=10B	4.0	18.5	21.5	14.50	1915	-18.4
12	Wilbrink, Marijn	0	NED	−11N	+65B	+44N	+29B	=8N	=15N	4.0	17.5	18.5	10.50	1918	0.0
13	Verhoeven, Lars	1857	NED	−14N	+32N	−6B	+58B	+47N	+36B	4.0	17.0	18.5	10.00	1981	+33.2
14	Van de Poel, Jona	1901	NED	+13B	−9N	=34B	=43N	+49B	+38N	4.0	16.5	18.5	11.75	1918	+2.6
15	Messaoudi, Nino	1942	NED	=39N	+57B	=31N	+30B	=10N	=12B	4.0	16.5	18.5	11.75	1993	+6.6
16	Van Happen, Niels	1831	NED	+54B	−23N	=24B	+61N	=9B	+42N	4.0	15.5	17.0	9.75	1904	+11.4
17	Tijhuis, Simon	1692	NED	−10B	+60N	+58B	=6N	=40B	+28N	4.0	15.5	17.0	9.50	1928	+63.2
18	Krosenbrink, Marcel	1897	NED	+60B	−10N	−4B	+66N	+41B	+27N	4.0	15.5	16.5	8.00	1967	+10.8
19	Koppenens, Oscar	1961	NED	+48N	+51B	F	+27N	+28B	−2B	4.0	15.5	15.5	10.50	2103	+34.0
20	Maes, Zayd	1733	NED	−58N	=63B	+48N	+53B	+26N	=8B	4.0	13.5	15.0	10.75	2085	+45.0
21	Nouwens, Jeroen	1811	NED	−8B	−55N	+65B	+60N	+51B	+35N	4.0	12.5	13.5	7.50	2059	+62.4
22	Van der Velden, Rens	1765	NED	+68B	+44B	=10N	+36B	−1N	−6N	3.5	19.5	20.5	8.50	1893	+17.8
23	Bakhuijzen, Nathan	1816	NED	+74B	+16B	−5N	+40N	−11B	=31N	3.5	18.0	18.0	8.00	1967	+50.4
24	Klute, Leon	1765	NED	−2N	+52B	=16N	−33B	+59B	+40N	3.5	16.5	18.0	8.00	1933	+54.4
25	Ngangbam, Chingthang	1922	NED	−30N	+73B	+47N	=10B	+45N	−4B	3.5	16.5	17.0	7.50	1824	-26.4
26	Baak, Karl	1887	NED	+59B	−50N	+66B	=42N	−20B	+61N	3.5	11.5	12.5	5.25	1840	-7.2
27	Mostert, Joost	1954	NED	+65N	=11B	=7N	−19B	+50N	−18B	3.0	18.5	19.5	7.25	1879	-11.0
28	Mastop, Guido	1795	NED	+70N	=7B	=11N	+50B	−19N	−17B	3.0	18.5	19.5	7.25	1824	+4.6
29	De Jonge, Elano	1904	NED	+73B	=4N	=42B	−12N	+37B	−9N	3.0	18.0	18.5	7.00	1749	-16.4
30	Van de Velde, Matthijs	1840	NED	+25B	+40N	−3B	−15N	F	+49N	3.0	17.0	17.0	8.00	1962	+33.6
31	Verhoeff, Timardi	1870	NED	F	+43N	=15B	+49N	−5B	=23B	3.0	16.5	16.5	8.25	1904	+4.8
32	Schoen, Hubert	2109	NED	−4N	−13B	+52N	−38B	+65N	+39B	3.0	16.0	17.0	5.50	1788	-79.2
33	Van der Berg, Bas	1978	NED	F	+46B	−36N	+24N	−4B	+45B	3.0	16.0	16.0	8.50	1929	-5.6
34	Van Beek, Harmen	1855	NED	+62N	−5B	=14N	−39B	=48N	+50B	3.0	15.5	17.0	6.75	1766	-12.2
35	Muskens, Mink	1878	NED	+52B	−49N	+41B	+54N	−7N	−21B	3.0	15.0	17.0	6.50	1805	-7.2
36	Perlog, Cristian	1839	MDA	=72N	+61B	+33B	−22N	=42B	−13N	3.0	14.5	15.5	6.25	1823	-2.4
37	Abanes, Menandro	1647	FID	+55B	−8N	−40B	+44B	−29N	+51N	3.0	14.0	16.0	6.50	1800	+36.8
38	Radfar, Bahman	1801	NED	−40B	+71N	−55B	+32N	+43B	−14B	3.0	14.0	15.0	6.50	1921	+31.6
39	Langeveld, Rik	1817	NED	=15B	−1N	+69B	+34N	−6B	−32N	2.5	20.0	21.0	6.00	1806	-4.0
40	Cornelissen, Jort	1868	NED	+38N	−30B	+37N	−23B	=17N	−24B	2.5	17.0	20.0	8.00	1703	-27.0
41	Tjin a Lien, Jie-Ren	1765	NED	−5N	+62B	−35N	+67B	−18N	=44B	2.5	15.5	16.5	3.75	1756	-1.4
42	Timmerman, Jan	1779	NED	F	+53B	=29N	=26B	=36N	−16B	2.5	15.5	15.5	6.75	1872	+12.6
43	Van der Pas, Paul	1731	NED	=53N	−31B	+46N	=14B	−38N	=47B	2.5	15.0	17.0	6.75	1837	+29.6
44	Berendsen, David	1861	NED	+56B	−22N	−12B	−37N	+69B	=41N	2.5	15.0	16.0	4.25	1659	-22.0
45	Van Basten, Giovanni	1834	NED	+69B	−3N	=54B	+71N	−25B	−33N	2.5	14.5	15.5	3.00	1718	-15.6
46	De Jong, Jonse	2111	NED	=1B	−33N	−43B	−59N	+68B	+60N	2.5	14.0	15.0	5.25	1717	-90.8
47	Uittenbogaard, Hans	1817	NED	−49B	+56N	−25B	+68N	−13B	=43N	2.5	14.0	15.0	4.25	1660	-21.0
48	Amkreutz, Mitch	1749	NED	−19B	=69N	−20B	+62N	=34B	=58N	2.5	14.0	15.0	4.25	1577	-24.4
49	Van Dijk, Youp	1719	NED	+47N	+35B	−1N	−31B	−14N	−30B	2.0	18.5	21.0	5.50	1753	+9.6
50	Van Montfort, Loe	1772	NED	+6B	+26B	−8N	−28N	−27B	−34N	2.0	18.0	21.0	8.00	1760	-3.6
51	Hoving, Julian	1832	NED	+71B	−19N	+68N	−7B	−21N	−37B	2.0	16.5	17.5	2.00	1577	-63.6
52	Menyah, Kwesi	1803	ENG	−35N	−24N	−32B	+56N	F	+53B	2.0	13.5	14.5	4.00	1807	-0.4
53	Baak, Evert	1899	NED	=43B	−42N	+72B	−20N	=54B	−52N	2.0	13.0	14.0	3.25	1642	-41.2
54	Cornelissen, Roderick	1752	NED	−16N	+67B	=45N	−35B	=53N	F	2.0	12.5	12.5	3.25	1804	+6.4
55	Van den Doel, Floris	0	NED	−37N	+21B	+38N	F	F	F	2.0	10.0	10.0	7.00	1773	0.0
56	Visser, Wouter	1816	NED	−44N	−47B	−67N	−52B	+62N	+70B	2.0	9.5	10.5	2.50	1558	-31.8
57	Van Garderen, Ton	1836	NED	F	−15N	F	+70B	F	+59N	2.0	6.5	6.5	2.50	1884	+4.8
58	Hendawi, Diya	0	NED	+20B	−2B	−17N	−13N	F	=48B	1.5	19.5	20.5	5.25	1655	0.0
59	Tjin a Lien, Ike	1747	NED	−26N	−6N	=62B	+46B	−24N	−57B	1.5	16.0	17.5	3.25	1657	-16.4
60	Reemst, Marnix	1842	NED	−18N	−17B	=70N	−21B	+73N	−46B	1.5	15.5	16.0	1.00	1438	-88.8
61	Marinus, Jeroen	1764	NED	=64B	−36N	+63N	−16B	F	−26B	1.5	13.5	14.5	2.25	1645	-24.0
62	Borremans, Adrie	0	NED	−34B	−41N	=59N	−48B	−56B	+73N	1.5	11.5	12.0	1.25	1429	0.0
63	De Witte, Sjoerd	1793	NED	−3B	=20N	−61B	+72N	F	F	1.5	11.5	11.5	3.00	1738	-6.8
64	Naithani, Shaurya	1894	USA	=61N	+72B	F	F	F	F	1.5	2.5	2.5	1.75	1803	0.0
65	Van de Velde, Wilco	1676	NED	−27B	−12N	−21N	F	−32B	+72N	1.0	15.0	15.0	1.00	1715	+3.6
66	Balde, Esko	1860	NED	−7N	+70B	−26N	−18B	F	F	1.0	15.0	15.0	1.00	1635	-44.4
67	Metz, Atze	1965	NED	−9B	−54N	+56B	−41N	F	F	1.0	12.0	12.0	2.00	1589	-78.4
68	FIDE 40129560	0	—	−22N	F	−51B	−47B	−46N	+69N	1.0	11.5	11.5	1.00	1070	0.0
69	Mes, Chay	0	NED	−45N	=48B	−39N	=73B	−44N	−68B	1.0	11.0	11.5	1.50	1493	0.0
70	Van der Velde, Roel	1546	NED	−28B	−66N	=60B	−57N	=72B	−56N	1.0	9.5	10.5	1.25	1552	0.0
71	Sidorov, Konstantin	1682	NED	−51N	−38B	+73N	−45B	F	F	1.0	9.5	9.5	0.50	1022	-37.6
72	Lind Stam, Tomas Raul	1802	NED	=36B	−64N	−53N	−63B	=70N	−65B	1.0	9.0	10.0	2.00	1511	-72.4
73	FIDE 40129551	0	—	−29N	−25N	−71B	=69N	−60B	−62B	0.5	10.5	11.5	0.50	1038	0.0
74	Van Orsouw, Theo	1951	NED	−23N	F	F	F	F	F	0.0	3.5	3.5	0.00	1016	-13.6

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers

1Sewpal, IndyNED
+83.2
4.0 pts · #11
2Tijhuis, SimonNED
+63.2
4.0 pts · #28
3Nouwens, JeroenNED
+62.4
4.0 pts · #16

Top rating losers

1De Jong, JonseNED
-90.8
2.5 pts · #50
2Reemst, MarnixNED
-88.8
1.5 pts · #69
3Schoen, HubertNED
-79.2
3.0 pts · #29

Biggest upsets

R3+380 Elo gap
Van der Pas, Paul1731 beat De Jong, Jonse2111
R4+364 Elo gap
Tjin a Lien, Ike1747 beat De Jong, Jonse2111
R1+336 Elo gap
Van der Hoek, Sam1773 beat Schoen, Hubert2109