21. Internationales Rostocker Schach-Open 2025

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79 players participated in this 7-round tournament, held from 27 Aug 2025 to 31 Aug 2025 in Rostock, Germany. 3 titled players from 2 federations. Top 10 Elo average was 2108, and top seed was Michael Kotyk (🇩🇪 GER, CM, 2212).

Michael Schulz (🇩🇪 GER, FM, 2103) won with 6.0/7, ahead of Theis Pahl (5.5) and Thomas Mangold (5.5). Schulz clinched sole first place in the final round.

The biggest upset came in round 1: Jonas Engelke (1638) beat Ruben Lehmann (1987), a +349-point gap.

Location

🇩🇪Rostock, Germany

Dates

27 Aug 2025 → 31 Aug 2025

Time control

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

System

Swiss · 7 rounds

Top seed

🇩🇪CMMichael Kotyk2212

Avg top 10

2,108

Participants

Titled players · 3

FM×1

CM×1

WFM×1

Federations · 2 represented

🇩🇪Germany×76

🇦🇫Afghanistan×1

Top 3

🥇
FMMichael Schulz
🇩🇪GER·2103
6.0pts·2254perf+23.4
🥈
Theis Pahl
🇩🇪GER·2193
5.5pts·2209perf+4.4
🥉
Thomas Mangold
🇩🇪GER·2020
5.5pts·2112perf+16.4

How it unfolded

Top 6 · 7 rounds

FM Michael Schulz led from R7; +0.5-point edge over the runner-up.

Co-leaders

Schulz6Pahl5.5Mangold5.5Kallweit5.5Moser5Voigt5— ex-leaders:Kotykled R4, #17

R6 · LEADER CHANGE30 Aug

Theis Pahl takes the sole lead (5.5/6).

R7 · HEAD-TO-HEAD · WINNER VS 2ND

FM Michael Schulz beat Theis Pahl (Black).

WIN STREAKS · 2 top finishers

Theis Pahl 3 wins (R4–R6)Thomas Mangold 3 wins (R5–R7)

Key matchups · top 4

Head-to-head between the four finishers

Player	1	2	3	4
1FMMichael Schulz	*	1	—	—
2Theis Pahl	0	*	—	—
3Thomas Mangold	—	—	*	—
4Paul Kallweit	—	—	—	*

Grille américaine

#	Player	Elo	Fed	R1	R2	R3	R4	R5	R6	R7	Pts	Bu C1	Bu	SB	Perf	Δ
1	Schulz, MichaelFM	2103	GER	+51N	+21B	=20N	+16B	=5N	+19B	+2N	6.0	27.0	30.0	25.50	2254	+23.4
2	Pahl, Theis	2193	GER	+65B	+24N	=13B	+7B	+9N	+11N	−1B	5.5	29.0	31.0	22.75	2209	+4.4
3	Mangold, Thomas	2020	GER	=6N	=17B	+25N	=23B	+37N	+21B	+10N	5.5	26.5	30.0	23.25	2112	+16.4
4	Kallweit, Paul	1981	GER	+53B	+32N	=8B	=13N	=15B	+30N	+11B	5.5	25.5	28.5	21.50	2172	+33.2
5	Moser, Axel	2137	GER	+40B	+31N	+12B	−11N	=1B	+15N	=9B	5.0	28.0	31.5	21.50	2128	+1.2
6	Razawi, S.Ahmad Fahim	1689	AFG	=3B	+54N	=22B	+12N	=8B	=7B	+19N	5.0	28.0	31.0	21.25	2092	+71.4
7	Voigt, AnastasiaWFM	1898	GER	+33B	+26N	+34B	−2N	=14B	=6N	+24B	5.0	26.5	30.0	19.75	2092	+72.4
8	Hirsch, Christian	1881	GER	+52N	+35B	=4N	−19B	=6N	+26B	+22B	5.0	26.0	29.0	19.75	2002	+46.8
9	Bahls, Henning	1826	GER	+74B	=38N	+30B	+34N	−2B	+14N	=5N	5.0	25.5	26.5	16.75	2150	+59.0
10	Martin, Dennis	2049	GER	+41B	+39N	−11B	+26N	+31B	+20N	−3B	5.0	25.0	28.5	18.50	2106	+11.6
11	Kotyk, MichaelCM	2212	GER	+43N	+46B	+10N	+5B	=19N	−2B	−4N	4.5	28.5	32.0	19.00	2091	-16.2
12	Koelpin, Arvid	1974	GER	+56N	+37B	−5N	−6B	+36N	+32B	=16N	4.5	25.0	28.0	15.75	1951	-1.6
13	Walz, Fabian	1970	GER	+64B	+29N	=2N	=4B	=21N	F	+33B	4.5	25.0	25.0	17.50	2043	+26.4
14	Freyberg, Dominic	2108	GER	+49N	+50B	=19N	=20B	=7N	−9B	+45N	4.5	24.5	27.5	16.00	1975	-20.0
15	Krause, Enrico	1892	GER	+59N	+36B	−58N	+49B	=4N	−5B	+35N	4.5	23.5	26.0	15.25	1946	+22.8
16	Chua, Daniel James	1862	GER	+69B	+66N	=38B	−1N	=32B	+44N	=12B	4.5	23.0	25.0	13.25	1983	+40.0
17	Berndt, Matthias	2078	GER	=54B	=3N	=65B	=44N	+55B	=31N	+30B	4.5	22.0	24.0	15.25	1983	-13.2
18	Lehmann, Ruben	1987	GER	−60B	+57N	=40B	=41N	=33B	+39N	+31B	4.5	20.5	23.0	15.25	1879	-14.2
19	Alpers, Arne	1922	GER	+61B	+44N	=14B	+8N	=11B	−1N	−6B	4.0	28.5	31.0	15.50	1971	+10.2
20	Ebert, Mika	1900	GER	+57B	+60N	=1B	=14N	+22B	−10B	F	4.0	26.5	29.0	14.75	2042	+24.4
21	Bauer, Lars	1843	GER	+75B	−1N	+60B	+38N	=13B	−3N	=28B	4.0	26.0	27.0	11.25	1939	+39.6
22	Schmidt, Peter	2040	GER	+42N	=30B	=6N	+43B	−20N	+50B	−8N	4.0	24.5	27.5	14.25	1908	-21.0
23	Singh, Marcel	1930	GER	+48B	−34N	+53B	=3N	+39B	=28N	F	4.0	24.0	27.0	14.75	2029	+17.2
24	Nour, Alaa	1922	GER	+63N	−2B	−51N	+52B	+56N	+43B	−7N	4.0	23.0	25.5	12.00	1879	-7.2
25	Hartung, Kim	1751	GER	−34B	+68N	−3B	=33N	+61B	=27N	+50N	4.0	22.0	24.0	11.25	1916	+57.2
26	Boettcher, Frank, Dr.	1867	GER	+78N	−7B	+71N	−10B	+66N	−8N	+51B	4.0	22.0	22.0	7.00	1704	-17.0
27	Von Otte, Wilhelm	1974	GER	−35N	+52B	−49N	+63B	=42N	=25B	+37N	4.0	20.5	23.0	12.75	1782	-31.4
28	Bock, Marlon	2034	GER	−36N	=59B	+73N	=65B	+49N	=23B	=21N	4.0	19.0	20.5	10.75	1787	-68.8
29	Lotzmanov, Peter	1808	GER	+71N	−13B	=35N	=59B	+72N	F	+49B	4.0	17.0	17.0	9.50	1750	-12.8
30	Montag, Ralf	2015	GER	+76B	=22N	−9N	+35B	+46N	−4B	−17N	3.5	26.0	27.0	10.00	1852	-25.8
31	Gazizov, Max	1874	GER	+70N	−5B	+36N	+51B	−10N	=17B	−18N	3.5	25.5	27.5	10.75	1894	+1.2
32	Hodl, Ingolf, Dr.	1963	GER	+77N	−4B	=42N	+47B	=16N	−12N	=40B	3.5	25.0	26.0	10.25	1844	-19.8
33	Vakeel, Eshwar	1665	GER	−7N	+78B	=37N	=25B	=18N	+46B	−13N	3.5	25.0	25.0	9.50	1821	+43.2
34	Weise, Martin	2097	GER	+25N	+23B	−7N	−9B	−43N	=59B	+52N	3.5	24.5	27.0	12.25	1796	-48.2
35	Grimm, Jakob	1701	GER	+27B	−8N	=29B	−30N	+53B	+65N	−15B	3.5	24.0	26.0	11.00	1880	+63.2
36	Tank, Julian	1692	GER	+28B	−15N	−31B	+48N	−12B	+68N	=44B	3.5	23.5	25.5	11.25	1859	+56.8
37	Wegner, Michael	1833	GER	+72B	−12N	=33B	+61N	−3B	+41N	−27B	3.5	23.5	25.0	9.25	1783	-16.8
38	Ruddat, Jarne	1958	GER	+47N	=9B	=16N	−21B	+51N	=45B	F	3.5	23.5	23.5	13.00	1892	-20.0
39	Onasch, Gunnar	1955	GER	+67N	−10B	+56N	=46B	−23N	−18B	+59N	3.5	22.5	24.5	9.25	1820	-21.8
40	Menkhaus, Wolf-Dieter	1909	GER	−5N	+70B	=18N	−50B	+62N	=42B	=32N	3.5	22.0	24.0	10.25	1835	-10.4
41	Dettmann, Nils	1809	GER	−10N	+67B	=50N	=18B	=47N	−37B	+63N	3.5	22.0	24.0	10.00	1840	+3.4
42	Recklies, Volker	1784	GER	−22B	+74N	=32B	=45N	=27B	=40N	=43N	3.5	22.0	23.0	10.00	1854	+13.6
43	Scheibl, Luis	1763	GER	−11B	+69N	+66B	−22N	+34B	−24N	=42B	3.5	21.5	23.5	9.25	1895	+15.8
44	Wecke, Thoralf	1854	GER	+73N	−19B	+72N	=17B	=50N	−16B	=36N	3.5	21.0	22.5	8.50	1756	-13.4
45	Schoenrock, Ruediger	1887	GER	+62N	−58B	=47N	=42B	+59N	=38N	−14B	3.5	20.5	23.0	10.25	1847	-5.4
46	Guenther, Arthur	1832	GER	+68B	−11N	+55B	=39N	−30B	−33N	+61B	3.5	20.5	22.5	9.25	1837	-0.8
47	Birkholz, Karl Lukas	1834	GER	−38B	+75N	=45B	−32N	=41B	=48N	+72B	3.5	19.0	20.0	7.75	1738	-14.8
48	Ehrich, Dieter	1652	GER	−23N	−49B	+78N	−36B	+64N	=47B	+60N	3.5	19.0	19.0	6.75	1667	+0.6
49	Gorski, Paul Peter	1639	GER	−14B	+48N	+27B	−15N	−28B	+57N	−29N	3.0	24.5	27.5	10.50	1802	+46.4
50	Mueller-Navarra, Sylvin, Dr.	1974	GER	+79B	−14N	=41B	+40N	=44B	−22N	−25B	3.0	23.0	23.0	7.00	1787	-29.6
51	Maruhn, Sebastian	1761	GER	−1B	+79N	+24B	−31N	−38B	+69N	−26N	3.0	23.0	23.0	6.00	1780	+1.6
52	Spreer, Lutz	1710	GER	−8B	−27N	+79B	−24N	+74B	+55N	−34B	3.0	20.5	20.5	4.00	1707	-2.8
53	Traum, Marie	1664	GER	−4N	+77B	−23N	=62B	−35N	+73B	=56N	3.0	20.0	21.0	5.25	1602	-22.8
54	Heimbrodt, Birk	1801	GER	=17N	−6B	−59N	+73B	−60N	=63B	+67N	3.0	19.0	20.5	7.00	1521	-36.2
55	Lavoie-Levasseur, Patrice	1678	GER	−58N	+62B	−46N	+67B	−17N	−52B	+70N	3.0	18.5	20.5	6.50	1591	-27.6
56	Raitza, Egon	1769	GER	−12B	+76N	−39B	+74N	−24B	=72N	=53B	3.0	17.5	18.5	4.25	1642	-16.4
57	Schumacher, Erik Johann	1562	GER	−20N	−18B	+77N	−66B	+67N	−49B	+76N	3.0	16.5	17.5	4.00	1561	-6.4
58	Pererva, Viktor	2066	GER	+55B	+45N	+15B	F	F	F	F	3.0	11.0	11.0	11.00	2619	+12.6
59	Eschrig, Immanuel	1693	GER	−15B	=28N	+54B	=29N	−45B	=34N	−39B	2.5	23.0	26.0	8.75	1822	+37.6
60	Engelke, Jonas	1638	GER	+18N	−20B	−21N	−72B	+54B	=66N	−48B	2.5	21.0	22.5	8.50	1765	+14.0
61	Chandrasekher, Ritu	1600	GER	−19N	=73B	+64N	−37B	−25N	+62B	−46N	2.5	20.0	21.5	5.75	1611	-0.8
62	Nickel, Alexander	1467	GER	−45B	−55N	+76B	=53N	−40B	−61N	+68B	2.5	17.5	18.5	4.50	1542	+14.4
63	Nickel, Theodor	1706	GER	−24B	−65N	+75B	−27N	+78B	=54N	−41B	2.5	17.5	17.5	2.50	1629	-24.8
64	Korte, Holger, Prof. Dr.	1610	GER	−13N	−71B	−61B	+79N	−48B	+74N	=66B	2.5	15.5	15.5	2.00	1472	-31.2
65	Grusdas, Daniel	1925	GER	−2N	+63B	=17N	=28N	F	−35B	F	2.0	22.0	22.0	6.75	1870	-7.8
66	Scharfenort, Lenny	0	GER	F	−16B	−43N	+57N	−26B	=60B	=64N	2.0	20.0	20.0	5.50	1592	0.0
67	Hueckel, Gustav	0	GER	−39B	−41N	+68B	−55N	−57B	+79N	−54B	2.0	18.0	18.0	2.00	1483	0.0
68	Zehl, Jens-Uwe	1731	GER	−46N	−25B	−67N	+77B	+70N	−36B	−62N	2.0	17.5	18.5	3.00	1411	-79.2
69	Mertens, Lothar	1703	GER	−16N	−43B	F	+75N	+71B	−51B	F	2.0	16.0	16.0	3.00	1528	-17.8
70	Quester, Manfred	0	GER	−31B	−40N	−74B	+76N	−68B	+78N	−55B	2.0	14.0	14.0	1.00	926	0.0
71	Jansky, Christoph	0	GER	−29B	+64N	−26B	F	−69N	F	+75B	2.0	13.5	13.5	3.50	1626	0.0
72	Gusev, Eduard	0	GER	−37N	F	−44B	+60N	−29B	=56B	−47N	1.5	20.0	20.0	4.00	1597	0.0
73	Engberts, Stephan	0	GER	−44B	=61N	−28B	−54N	+79B	−53N	F	1.5	16.0	16.0	1.25	1425	0.0
74	Manthe, Joern Horst	1439	GER	−9N	−42B	+70N	−56B	−52N	−64B	−77B	1.0	19.0	20.0	2.00	902	0.0
75	Mueller-Raitza, Rosemarie	1501	GER	−21N	−47B	−63N	−69B	+77N	−76B	−71N	1.0	15.0	16.0	1.00	1480	-4.0
76	Siwon, Ursula	0	GER	−30N	−56B	−62N	−70B	F	+75N	−57B	1.0	15.0	15.0	1.00	1423	0.0
77	Langbein, Wolfgang, Dr.	1512	GER	−32B	−53N	−57B	−68N	−75B	F	+74N	1.0	13.5	13.5	1.00	1362	-23.0
78	FIDE 34672150	0	—	−26B	−33N	−48B	F	−63N	−70B	F	0.0	15.5	15.5	0.00	923	0.0
79	FIDE 533012571	0	—	−50N	−51B	−52N	−64B	−73N	−67B	F	0.0	15.0	15.0	0.00	964	0.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers

1Voigt, AnastasiaWFMGER
+72.4
5.0 pts · #6
2Razawi, S.Ahmad FahimAFG
+71.4
5.0 pts · #10
3Grimm, JakobGER
+63.2
3.5 pts · #34

Top rating losers

1Zehl, Jens-UweGER
-79.2
2.0 pts · #73
2Bock, MarlonGER
-68.8
4.0 pts · #35
3Weise, MartinGER
-48.2
3.5 pts · #29

Biggest upsets

R1+349 Elo gap
Engelke, Jonas1638 beat Lehmann, Ruben1987
R1+342 Elo gap
Tank, Julian1692 beat Bock, Marlon2034
R3+335 Elo gap
Gorski, Paul Peter1639 beat Von Otte, Wilhelm1974