CChessStats

Sofia Chess Summer 2025 A-Under the aegis of BSCF

Open SwissStandard

16 players participated in this 6-round tournament, held from 19 Jul 2025 to 20 Jul 2025 in Sofia, Bulgaria. 2 federations represented. Top 10 Elo average was 1198, and top seed was Kaloyan Iv. Ivanov (🇧🇬 BUL, 1560).

Rodion Maksimets (🇷🇺 RUS, 1509) won with 5.5/6, ahead of Nikol Ivanova (4.5) and Ognyan Petrov (4.5). Maksimets won solo starting round 5.

The biggest upset came in round 2: Darina Ivanova (1438) beat Kaloyan Iv. Ivanov (1560), a +122-point gap.

Location
🇧🇬Sofia, Bulgaria
Dates
19 Jul 2025 → 20 Jul 2025
Time control
Standard: 30 minutes for game with 30 seconds increment from move 1
System
Swiss · 6 rounds
Top seed
🇧🇬Kaloyan Iv. Ivanov1560
Avg top 10
1,198
Participants
16
Federations · 2 represented
🇧🇬Bulgaria×13
🇷🇺Russia×1
Top 3

How it unfolded

Top 6 · 6 rounds

Rodion Maksimets led from R5; +1.0-point edge over the runner-up. Title race converged from 2 co-leaders at R4 to 1 by R5.

Co-leaders
8
4
2
2
1
1
1.534.56R1R2R3R4R5R6
Maksimets5.5Ivanova4.5Ivanova4.5Petrov4.5Ivanov3.5Todorova3.5
R5–R6 · LEAD HELD

Rodion Maksimets never relinquished the lead after R5; final gap +1.0 over the runner-up.

R1 · HEAD-TO-HEAD · WINNER VS 2ND

Rodion Maksimets beat Nikol Ivanova (Black).

WIN STREAKS · 3 top finishers

Rodion Maksimets 3 wins (R1–R3)Nikol Ivanova 4 wins (R2–R5)Darina Ivanova 3 wins (R1–R3)

Key matchups · top 4

Head-to-head between the four finishers
Player1234
1Rodion Maksimets*
1
½
1
2Nikol Ivanova
0
*
1
½
3Darina Ivanova
½
0
*—
4Ognyan Petrov
0
½
—*

Grille américaine

#PlayerEloFedR1R2R3R4R5R6PtsBu C1BuSBPerfΔ
1Maksimets, Rodion1509RUS+2N+11B+3N=4B+7N+8B5.519.522.019.751768+37.6
2Ivanova, Nikol0BUL−1B+10N+5B+13N+4N=3B4.521.023.515.7515440.0
3Petrov, Ognyan1506BUL+13B+5N−1B+8N+9B=2N4.519.522.014.251519-1.2
4Ivanova, Darina1438BUL+15N+6B+7N=1N−2B+12B4.519.020.012.751841+74.4
5Todorova, Miroslava1530BUL+16N−3B−2N+12B=6N+11B3.517.517.56.751509-3.6
6Ivanov, Kaloyan Iv.1560BUL+9B−4N−8B+10N=5B+7B3.517.020.010.751594+6.8
7Slavchev, Hristo1514BUL+14B+8N−4B+9N−1B−6N3.019.521.07.50702-62.0
8Stoychev, Georgi0BUL+12N−7B+6N−3B+14N−1N3.019.020.57.5014380.0
9Aleksandrov, Atanas0BUL−6N+15B+11N−7B−3N+16B3.014.514.53.507350.0
10Petkov, Yavor1481BUL−11N−2B+15N−6B+16N+14B3.013.013.02.50759-17.2
11Stoyanov,Nicola0BUL+10B−1N−9B=14N+13B−5N2.517.519.06.2513910.0
12Dimitrov, Kristian1439BUL−8B+14N=13B−5N+15B−4N2.515.016.03.75685-34.8
13Safonov, Rostislav0BUL−3N+16B=12N−2B−11N+15B2.515.015.02.2512920.0
14Heil, Teodor0BUL−7N−12B+16N=11B−8B−10N1.514.014.01.256880.0
15FIDE 29746490—−4B−9N−10B+16B−12N−13N1.015.515.50.006620.0
16FIDE 29745410—−5B−13N−14B−15N−10B−9N0.013.514.50.007200.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets