Ohta-park chess Autumn 2025. Standard B2

Open SwissStandard

23 players participated in this 7-round tournament, held from 02 Nov 2025 to 04 Nov 2025 in Mistolovo, Russia. Top 10 Elo average was 1529, and top seed was Dmitry Karyshev (🇷🇺 RUS, 1579).

Nikolay Petrov (🇷🇺 RUS, 1497) won with 6.0/7, ahead of Timofey Kovalev (5.5) and Oleg Gen Grabov (5.5). Petrov shared the lead from round 6 and broke clear in the final round.

The biggest upset came in round 2: Aleksandr Ressin (1440) beat Dmitry Karyshev (1579), a +139-point gap.

Location

🇷🇺Mistolovo, Russia

Dates

02 Nov 2025 → 04 Nov 2025

Time control

Standard: 60 minutes with 30 seconds increment from move 1

System

Swiss · 7 rounds

Top seed

🇷🇺Dmitry Karyshev1579

Avg top 10

1,529

Participants

Federations · 1 represented

🇷🇺Russia×23

Top 3

🥇
Nikolay Petrov
🇷🇺RUS·1497
6.0pts·1861perf+33.6
🥈
Timofey Kovalev
🇷🇺RUS·1551
5.5pts·1693perf+28.8
🥉
Oleg Gen Grabov
🇷🇺RUS
5.5pts·1577perf0.0

How it unfolded

Top 6 · 7 rounds

Nikolay Petrov led from R7; +0.5-point edge over the runner-up.

Co-leaders

Petrov6Grabov5.5Kovalev5.5Skurikhin4.5Chizhikov4.5Cheremnykh4.5

R7 · LEADER CHANGE04 Nov

Nikolay Petrov takes the sole lead (6.0/7).

WIN STREAKS · 2 top finishers

Oleg Gen Grabov 5 wins (R2–R6)Timofey Kovalev 4 wins (R1–R4)

Key matchups · top 4

Head-to-head between the four finishers

Player	1	2	3	4
1Nikolay Petrov	*	—	½	—
2Oleg Gen Grabov	—	*	½	1
3Timofey Kovalev	½	½	*	1
4Timofey Skurikhin	—	0	0	*

Grille américaine

#	Player	Elo	Fed	R1	R2	R3	R4	R5	R6	R7	Pts	Bu C1	Bu	SB	Perf	Δ
1	Petrov, Nikolay	1497	RUS	+18N	=8B	+10N	+9B	=2B	+13N	+4N	6.0	25.5	27.5	22.75	1861	+33.6
2	Kovalev, Timofey	1551	RUS	+22N	+19B	+7N	+5B	=1N	=4B	=3N	5.5	26.0	27.5	19.50	1693	+28.8
3	Grabov, Oleg Gen	0	RUS	−7N	+21B	+16N	+10B	+6N	+5B	=2B	5.5	25.5	27.0	20.25	1577	0.0
4	Chizhikov, Nikita M	1485	RUS	+6N	−5B	+17N	+7B	+8N	=2N	−1B	4.5	28.5	30.5	17.25	1507	+6.0
5	Skurikhin, Timofey	1577	RUS	+14B	+4N	+15B	−2N	+12B	−3N	=7B	4.5	27.0	30.0	17.00	1609	+5.6
6	Cheremnykh, Varvara V	1475	RUS	−4B	+14N	+20B	+15N	−3B	=8N	+13B	4.5	24.0	25.5	13.50	1505	+4.0
7	Ressin, Aleksandr	1440	RUS	+3B	+12N	−2B	−4N	+22B	=11B	=5N	4.0	28.0	29.5	15.25	1477	+9.6
8	Kovalenko, Ilya	0	RUS	+13B	=1N	+9B	=17N	−4B	=6B	=11N	4.0	26.5	28.5	15.75	1505	0.0
9	Popova, Darya Nikit	0	RUS	=10N	+11B	−8N	−1N	=14B	+16B	+21N	4.0	24.5	26.0	12.25	1545	0.0
10	Voronkova, Ekaterina	1537	RUS	=9B	+20N	−1B	−3N	+19B	=12N	+15B	4.0	24.0	25.5	10.00	1343	-20.8
11	Polyakov, Timofey Dm	1548	RUS	=20B	−9N	=14B	+18N	+15B	=7N	=8B	4.0	20.5	22.0	11.50	1440	-6.0
12	Karyshev, Dmitry	1579	RUS	+21N	−7B	=22N	+19B	−5N	=10B	+17N	4.0	17.5	19.0	7.75	1247	-49.6
13	Vergun, Olga Ev	1520	RUS	−8N	+18B	=19N	+22B	+16N	−1B	−6N	3.5	21.0	22.5	7.25	1369	-25.2
14	Pavlova, Anna	0	RUS	−5N	−6B	=11N	+21B	=9N	=17B	+20N	3.5	20.5	22.0	8.00	1260	0.0
15	Rubanova, Anastasiya	0	RUS	+?N	+16B	−5N	−6B	−11N	+23B	−10N	3.0	20.5	20.5	3.50	1393	0.0
16	Biyachuev, Minkail	1519	RUS	+17B	−15N	−3B	+23N	−13B	−9N	+19B	3.0	19.5	20.0	4.00	725	-19.6
17	Popova, Natalia Nikit	0	RUS	−16N	F	−4B	=8B	+20N	=14N	−12B	2.0	20.5	20.5	5.25	727	0.0
18	Pekshev, Yury Al	0	RUS	−1B	−13N	F	−11B	−21N	+19N	+23B	2.0	17.0	17.0	2.00	722	0.0
19	Skurikhina, Kseniya	0	RUS	+23B	−2N	=13B	−12N	−10N	−18B	−16N	1.5	22.0	22.5	2.25	1177	0.0
20	Kutushev, Timur	0	RUS	=11N	−10B	−6N	F	−17B	+22N	−14B	1.5	19.5	19.5	3.50	1247	0.0
21	Shilenko, Yakov Vad	0	RUS	−12B	−3N	=23B	−14N	+18B	F	−9B	1.5	19.5	19.5	2.25	779	0.0
22	Dremova, Darya	0	RUS	−2B	+23N	=12B	−13N	−7N	−20B	F	1.5	19.0	19.0	2.50	1202	0.0
23	Sautkin, Roman Vikt	0	RUS	−19N	−22B	=21N	−16B	F	−15N	−18N	0.5	12.5	12.5	0.75	718	0.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers

1Petrov, NikolayRUS
+33.6
6.0 pts · #2
2Kovalev, TimofeyRUS
+28.8
5.5 pts · #3
3Ressin, AleksandrRUS
+9.6
4.0 pts · #8

Top rating losers

1Karyshev, DmitryRUS
-49.6
4.0 pts · #12
2Vergun, Olga EvRUS
-25.2
3.5 pts · #11
3Voronkova, EkaterinaRUS
-20.8
4.0 pts · #18

Biggest upsets

R2+139 Elo gap
Ressin, Aleksandr1440 beat Karyshev, Dmitry1579