CChessStats

Irkutsk Region Chess Championship 2025_B15

Open SwissStandard

23 players participated in this 9-round tournament, held from 12 Sept 2025 to 16 Sept 2025 in Angarsk, Russia. Top 10 Elo average was 1444, and top seed was Alexandr A Kozyrin (🇷🇺 RUS, 1763).

Maxim A Kozyrin (🇷🇺 RUS, 1658) won with 7.0/9, ahead of Alexandr A Kozyrin (7.0) and Ivan Shurkhovetsky (7.0). Kozyrin shared the lead from round 8, winning on tie-break.

The biggest upset came in round 9: Ivan Shurkhovetsky (1480) beat Semen Mikh Kuznetsov (1604), a +124-point gap.

Location
🇷🇺Angarsk, Russia
Dates
12 Sept 2025 → 16 Sept 2025
Time control
Standard: 75 minutes with 30 seconds increment from move 1
System
Swiss · 9 rounds
Top seed
🇷🇺Alexandr A Kozyrin1763
Avg top 10
1,444
Participants
23
Federations · 1 represented
🇷🇺Russia×22
Top 3

How it unfolded

Top 6 · 9 rounds

Tight race until R3; 3 players tied at 7.0/9, decided on Buchholz.

Co-leaders
12
3
1
1
3
1
2
4
3
2.54.579R1R2R3R4R5R6R7R8R9Kuznetsov takes lead
Kozyrin7Shurkhovetsky7Kozyrin7Kuznetsov6Demin5.5Kalinin5.5
R6 · LEADER CHANGE15 Sept

Semen Mikh Kuznetsov takes the sole lead (5.0/6).

R9 · TIEBREAK CLUSTER

3 players finish on 7.0/9. Kozyrin takes the title on Buchholz Cut1 (45.0).

R5 · HEAD-TO-HEAD · WINNER VS 2ND

Maxim A Kozyrin drew with Ivan Shurkhovetsky (White).

Key matchups · top 4

Head-to-head between the four finishers
Player1234
1Maxim A Kozyrin*
½
½
½
2Ivan Shurkhovetsky
½
*
½
1
3Alexandr A Kozyrin
½
½
*
1
4Semen Mikh Kuznetsov
½
0
0
*

Grille américaine

#PlayerEloFedR1R2R3R4R5R6R7R8R9PtsBu C1BuSBPerfΔ
1Kozyrin, Maxim A1658RUS+13B+12N+6B=4N=3B=2B=5N+15N+7B7.045.049.036.251772+42.8
2Kozyrin, Alexandr A1763RUS+11B=15N=7N+17B+16B=1N+4B=3N+5N7.043.547.035.501722-11.2
3Shurkhovetsky, Ivan1480RUS−9N+22B+19N+8B=1N+12B+7N=2B+4N7.042.543.531.501860+96.8
4Kuznetsov, Semen Mikh1604RUS+14N=8B+9N=1B+7N+6B−2N+12B−3B6.046.050.530.501599-1.2
5Kalinin, Egor1657RUS+20B=16N=15B=12N=13B+10N=1B+6N−2B5.541.544.525.501656-0.8
6Demin, Timofey1618RUS+18N+17B−1N=7B+8N−4N+15B−5B+12N5.540.544.023.001540-26.0
7Shemet, Ilya1595RUS+10B+23N=2B=6N−4B+16N−3B+9N−1N5.046.546.520.251384-52.4
8Ermolovich, Alexey1482RUS+19B=4N=16B−3N−6B+21N=17B+10N=11B5.039.041.019.251293-26.8
9Khovansigi, Lev Alekseevich0RUS+3B=11N−4B−16N+?N+17B=13N−7B+?N5.035.035.015.2514330.0
10Borovchenko, Evgenii M0RUS−7N+18B−17N+21B+14N−5B+?N−8B+13N5.033.533.514.507790.0
11Andryushchenko, Maxim0RUS−2N=9B=?N+19B=17N+14B−12N+?B=8N5.032.532.514.2514300.0
12Parshakov, Timur Ol0RUS+?N−1B+21N=5B+15B−3N+11B−4N−6B4.542.042.013.7514070.0
13Smirnov, Kirill Art0RUS−1N=?B+18N+?B=5N−15N=9B+16N−10B4.534.034.012.7513620.0
14Farkov, Dmitrii Ser0RUS−4B+?N+23B−15N−10B−11N+22B+19N=18B4.527.527.55.757950.0
15Mazurov, Vladislav1587RUS+22N=2B=5N+14B−12N+13B−6N−1BF4.039.539.516.251481-21.2
16Agapov, Andrey M0RUS+21N=5B=8N+9B−2N−7B=?N−13B=20N4.037.037.013.7514320.0
17Semyaninov, Arseny Dm0RUS+?B−6N+10B−2N=11B−9N=8N=20BF3.535.535.511.5013480.0
18Nikhileev, Fedor0RUS−6B−10N−13BF+22N−?B+21N+23B=14N3.522.522.55.258170.0
19Soldatov, Iaromir0RUS−8NF−3B−11N+20B−?B+23N−14B+22N3.025.525.54.006800.0
20Chesnakov, Matvey A0RUS−5N−21B+22N−?B−19N+23BF=17N=16B3.019.019.04.758590.0
21Mavrichev, Leonid Al0RUS−16B+20N−12B−10NF−8B−18B+22NF2.026.026.04.006820.0
22Zasukha, Gleb Evg0RUS−15B−3N−20B+23N−18BF−14N−21B−19B1.027.027.00.007330.0
23FIDE 5400693970—F−7B−14N−22B−?N−20N−19B−18NF0.022.022.00.007950.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets