2025 U.S. Senior Open Championship

SwissStandard

57 players participated in this 6-round tournament, held from 25 Jul 2025 to 27 Jul 2025 in Northbrook, IL, United States. 16 titled players from 4 federations. Top 10 Elo average was 2294, and top seed was Douglas Root (🇺🇸 USA, IM, 2446).

Jesse Kraai (🇺🇸 USA, GM, 2372) won with 5.5/6, ahead of Douglas Root (4.5) and Mark Ginsburg (4.5). Kraai broke clear in the final round.

The biggest upset came in round 2: Gianluca Montalti (1717) beat Dmitry Gurevich (GM, 2338), a +621-point gap.

Location

🇺🇸Northbrook, IL, United States

Dates

25 Jul 2025 → 27 Jul 2025

Time control

Standard: 90 minutes with 30 second increment from move 1

System

Swiss · 6 rounds

Top seed

🇺🇸IMDouglas Root2446

Avg top 10

2,294

Participants

Titled players · 16

GM×4

IM×3

FM×6

CM×1

WIM×1

WCM×1

Federations · 4 represented

🇺🇸United States of America×53

🇨🇺Cuba×1

🇨🇦Canada×1

🇲🇰North Macedonia×1

Top 3

🥇
GMJesse Kraai
🇺🇸USA·2372
5.5pts·2524perf+8.1
🥈
IMDouglas Root
🇺🇸USA·2446
4.5pts·2319perf-6.7
🥉
IMMark Ginsburg
🇺🇸USA·2254
4.5pts·2400perf+7.7

How it unfolded

Top 6 · 6 rounds

GM Jesse Kraai led from R3; +1.0-point edge over the runner-up.

Co-leaders

Kraai5.5Bereolos4.5Ginsburg4.5Root4.5Morella Cabrera4.5Brock4

R3–R6 · LEAD HELD

GM Jesse Kraai never relinquished the lead after R3; final gap +1.0 over the runner-up.

R1–R4 · WIN STREAK

GM Jesse Kraai won 4 in a row (R1–R4).

Key matchups · top 4

Head-to-head between the four finishers

Player	1	2	3	4
1GMJesse Kraai	*	—	—	—
2FMPeter Bereolos	—	*	—	0
3IMMark Ginsburg	—	—	*	½
4IMDouglas Root	—	1	½	*

Grille américaine

#	Player	Elo	Fed	R1	R2	R3	R4	R5	R6	Pts	Bu C1	Bu	SB	Perf	Δ
1	Kraai, JesseGM	2372	USA	+28N	+7B	+12N	+19B	=6B	+4N	5.5	19.0	21.5	19.50	2524	+8.1
2	Root, DouglasIM	2446	USA	+11N	+13B	=3N	+5B	−4N	+31B	4.5	20.5	23.0	16.25	2319	-6.7
3	Ginsburg, MarkIM	2254	USA	+18B	+10N	=2B	F	+7N	+15B	4.5	19.5	19.5	17.25	2400	+7.7
4	Morella Cabrera, Julio AntonioFM	2147	CUB	+54B	+37N	=6B	+43N	+2B	−1B	4.5	18.5	19.0	11.50	2404	+33.0
5	Bereolos, PeterFM	2135	USA	+52B	=17N	+36B	−2N	+18B	+11N	4.5	17.5	18.5	12.25	2119	+1.6
6	Mitkov, NikolaGM	2388	MKD	F	+14B	=4N	+22B	=1N	+8B	4.0	20.5	20.5	15.50	2404	+1.4
7	Diller, Bradley R	1904	USA	+33B	−1N	+32B	+21N	−3B	+23N	4.0	18.5	21.0	11.00	2101	+27.8
8	Burnett, RonaldIM	2267	USA	+9N	=16B	+21B	=15N	+29B	−6N	4.0	18.0	20.5	13.00	2090	-9.0
9	Brock, William	1789	USA	−8B	+49N	−14N	+34B	+30N	+19B	4.0	15.5	16.5	9.00	2170	+44.2
10	Rhine, Frederick	1931	USA	+53N	−3B	+41N	=25B	=19N	+20B	4.0	15.5	16.0	8.50	2215	+40.8
11	Sax, Robert	1773	USA	−2B	=26B	+27N	+47N	+21B	−5B	3.5	18.0	20.0	9.50	1971	+17.2
12	Dehmelt, KarlFM	2054	USA	+48B	+20N	−1B	−29N	+28B	=17N	3.5	17.0	18.5	8.75	2014	-5.8
13	Roll, Craig	2130	USA	+46N	−2N	+28B	=24B	=25N	=16B	3.5	16.5	18.5	9.25	2107	-1.6
14	Airey, David C	0	USA	+45B	−6N	+9B	−20N	+36B	=29N	3.5	16.0	18.0	9.75	2002	0.0
15	Mills, James	1929	USA	F	+35B	+44N	=8B	+20N	−3N	3.5	16.0	16.0	9.50	2237	+38.0
16	Chambers, Chris L	1823	USA	+49B	=8N	=43B	=31N	=23B	=13N	3.5	15.0	16.0	8.50	2070	+35.8
17	Fischer, Robert J	1817	USA	+50N	=5B	−19N	+54B	=22N	=12B	3.5	15.0	15.5	7.00	2007	+21.8
18	Perks, Grant	1962	USA	−3N	=53B	+56N	+44B	−5N	+38B	3.5	14.0	14.0	4.75	1991	+10.8
19	Cline, John	2205	USA	+32B	=29N	+17B	−1N	=10B	−9N	3.0	19.5	22.0	9.25	1934	-34.8
20	Cornelison, PaulCM	2183	USA	+27N	−12B	+34N	+14B	−15B	−10N	3.0	17.5	20.0	9.00	1731	-44.2
21	Van Meter, LesterFM	1857	USA	+39N	+24B	−8N	−7B	−11N	+41B	3.0	17.0	19.0	7.50	1892	+3.2
22	Markzon, GregoryFM	2056	USA	+26N	=30B	+47B	−6N	=17B	F	3.0	15.0	15.0	8.00	1950	-10.8
23	Szpisjak, Steven	1909	USA	−41N	+46B	=40N	+30B	=16N	−7B	3.0	14.5	16.5	7.50	1878	-5.2
24	Murray, Michael A.	1866	CAN	+34B	−21N	+51B	=13N	−31B	=26N	3.0	14.5	15.5	6.75	1826	-3.8
25	Fedorowicz, JohnGM	2335	USA	=42N	+41B	=29B	=10N	=13B	F	3.0	14.0	14.0	8.00	2046	-14.4
26	Wotschka, Marco	0	USA	−22B	=11N	=42N	+41B	=44N	=24B	3.0	13.5	15.5	7.25	1890	0.0
27	Fein, Menachem Hemi	0	USA	−20B	+48N	−11B	=32N	+54N	=30B	3.0	13.0	13.5	4.50	1715	0.0
28	Sharp, Dale Eugene	1826	USA	−1B	+33N	−13N	+35B	−12N	=39N	2.5	17.5	20.0	6.25	1887	+5.2
29	Carey, Michael	1872	USA	F	=19B	=25N	+12B	−8N	=14B	2.5	17.0	17.0	8.25	2200	+29.2
30	Root, AlexeyWIM	1876	USA	+51B	=22N	=31B	−23N	−9B	=27N	2.5	15.5	16.5	5.25	1770	-12.6
31	Truelson, Nels	1959	USA	F	=44B	=30N	=16B	+24N	−2N	2.5	15.5	15.5	7.00	1972	-0.6
32	Braun, Jason	1798	USA	−19N	+50B	−7N	=27B	=48N	=34B	2.5	14.0	15.0	4.50	1757	-7.2
33	Cohen, Frederic	1734	USA	−7N	−28B	=39N	+46B	−35N	+50N	2.5	13.5	14.5	4.25	1749	+0.8
34	Scull, Kevin	1687	USA	−24N	+52N	−20B	−9N	+49B	=32N	2.5	13.5	14.5	3.25	1764	+18.4
35	Bailey, Gregory	1801	USA	=43B	−15N	+53B	−28N	+33B	−37N	2.5	13.0	13.5	4.00	1825	+1.2
36	Aaron, Michael	1825	USA	=55N	+56B	−5N	=37B	−14N	=45B	2.5	13.0	13.0	2.50	1993	+19.2
37	Thomas, Kenneth	1920	USA	+38N	−4B	F	=36N	F	+35B	2.5	12.0	12.0	6.25	1962	+4.2
38	Coski, Christopher	1693	USA	−37B	=54N	+52B	−40N	+47B	−18N	2.5	11.5	12.0	3.25	1750	+12.8
39	Christiansen, NatashaWCM	1719	USA	−21B	−51N	=33B	+53N	=42N	=28B	2.5	11.0	11.5	4.00	1696	-3.8
40	Sciacca, Patrick	1831	USA	F	+45N	=23B	+38B	F	F	2.5	7.5	7.5	6.00	2085	+18.6
41	Zazove, David	1834	USA	+23B	−25N	−10B	−26N	+51B	−21N	2.0	16.0	17.0	4.00	1814	-4.0
42	Murray, William	1874	USA	=25B	−43N	=26B	=45N	=39B	F	2.0	12.5	12.5	5.25	1908	-0.2
43	Eckert, DougFM	2151	USA	=35N	+42B	=16N	−4B	F	F	2.0	12.5	12.5	5.00	1911	-22.0
44	Bondar, Leonid	1936	USA	+57B	=31N	−15B	−18N	=26B	F	2.0	12.5	12.5	2.75	1677	-18.8
45	Lavoice, Richard	1835	USA	−14N	−40B	+50N	=42B	F	=36N	2.0	11.5	11.5	3.25	1779	-11.2
46	Mason, Mike W	2001	USA	−13B	−23N	=49B	−33N	=50B	+51N	2.0	11.0	12.0	2.00	1655	-49.4
47	Montalti, Gianluca	1717	USA	F	+55B	−22N	−11B	−38N	+52B	2.0	10.5	10.5	1.50	1791	+6.0
48	Miller, Paul A	0	USA	−12N	−27B	F	+51N	=32B	F	1.5	10.0	10.0	2.25	1783	0.0
49	Viray, Norman Eugenio	1707	USA	−16N	−9B	=46N	=50B	−34N	F	1.0	13.0	13.0	1.50	1537	-42.8
50	Naylor, Carla	1587	USA	−17B	−32N	−45B	=49N	=46N	−33B	1.0	12.5	13.5	1.50	1540	-7.0
51	Ross, Joseph M	1497	USA	−30N	+39B	−24N	−48B	−41N	−46B	1.0	12.0	13.5	2.50	1598	+7.8
52	Hill, Robert	1678	USA	−5N	−34B	−38N	F	+53B	−47N	1.0	12.0	12.0	0.50	1541	-18.4
53	Davenport, Alan Lee	1732	USA	−10B	=18N	−35N	−39B	−52N	F	0.5	13.5	13.5	1.75	1452	-58.0
54	Dean, James L	0	USA	−4N	=38B	F	−17N	−27B	F	0.5	13.5	13.5	1.25	1613	0.0
55	Gurevich, DmitryGM	2338	USA	=36B	−47N	F	F	F	F	0.5	4.5	4.5	1.25	1745	-13.4
56	Wijetunge, Ivan	1851	USA	F	−36N	−18B	F	F	F	0.0	6.0	6.0	0.00	1094	-17.8
57	FIDE 39986136	0	—	−44N	F	F	F	F	F	0.0	2.0	2.0	0.00	1136	0.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers

1Brock, WilliamUSA
+44.2
4.0 pts · #5
2Rhine, FrederickUSA
+40.8
4.0 pts · #7
3Mills, JamesUSA
+38.0
3.5 pts · #13

Top rating losers

1Davenport, Alan LeeUSA
-58.0
0.5 pts · #52
2Mason, Mike WUSA
-49.4
2.0 pts · #39
3Cornelison, PaulCMUSA
-44.2
3.0 pts · #47

Biggest upsets

R2+621 Elo gap
Montalti, Gianluca1717 beat GMGurevich, Dmitry2338
R6+416 Elo gap
Brock, William1789 beat Cline, John2205
R5+299 Elo gap
FMMorella Cabrera, Julio Antonio2147 beat IMRoot, Douglas2446