Sofia Chess Summer 2025 B-Under the aegis of BSCF
Open SwissStandard
27 players participated in this 6-round tournament, held from 19 Jul 2025 to 20 Jul 2025 in Sofia, Bulgaria. Top 10 Elo average was 1372, and top seed was Daniel P Todorov (🇧🇬 BUL, 1656).
Kaloyan Kaloyanov (🇧🇬 BUL, 1548) won with 5.5/6, ahead of Iliya Iliev Iliev (5.0) and Daniel P Todorov (4.5). Kaloyanov took the lead from round 5.
The biggest upset came in round 2: Valeri P. Petrov (1453) beat Avigeya Vasileva (1583), a +130-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
Federations · 1 represented
🇧🇬Bulgaria×20
Top 3
- 🥇
- 🥈
- 🥉
How it unfolded
Top 6 · 6 roundsKaloyan Kaloyanov led from R5; +0.5-point edge over the runner-up.
Co-leaders
13
7
3
1
1
1
R5 · LEADER CHANGE20 Jul
Kaloyan Kaloyanov takes the sole lead (4.5/5).
WIN STREAKS · 3 top finishers
Kaloyan Kaloyanov 3 wins (R1–R3)Iliya Iliev Iliev 3 wins (R1–R3)Daniel P Todorov 4 wins (R1–R4)
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1Kaloyan Kaloyanov | * | — | 1 | — |
| 2Iliya Iliev Iliev | — | * | 0 | — |
| 3Daniel P Todorov | 0 | 1 | * | ½ |
| 4Tsvetan Danev | — | — | ½ | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | R6 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Kaloyanov, Kaloyan | 1548 | BUL | +21B | +10N | +15B | =13N | +3N | +5B | 5.5 | 18.5 | 20.5 | 19.00 | 2366 | +63.6 |
| 2 | Iliev, Iliya Iliev | 1518 | BUL | +24N | +23B | +5N | −3B | +17N | +6B | 5.0 | 17.5 | 19.5 | 15.00 | 1603 | +8.8 |
| 3 | Todorov, Daniel P | 1656 | BUL | +16B | +6N | +14B | +2N | −1B | =4N | 4.5 | 22.0 | 25.0 | 17.25 | 1626 | -6.8 |
| 4 | Danev, Tsvetan | 1483 | BUL | +26N | −8B | +21N | +22B | +13N | =3B | 4.5 | 15.5 | 15.5 | 9.25 | 1655 | +8.8 |
| 5 | Petrov, Valeri P. | 1453 | BUL | +18B | +7N | −2B | +10N | +14B | −1N | 4.0 | 21.5 | 24.5 | 14.00 | 1555 | +0.8 |
| 6 | Angelova, Katrin | 0 | BUL | +?N | −3B | +24N | +8B | +7B | −2N | 4.0 | 19.5 | 19.5 | 10.00 | 1463 | 0.0 |
| 7 | Vasileva, Avigeya | 1583 | BUL | +19N | −5B | +9N | +11B | −6N | +13B | 4.0 | 19.0 | 21.5 | 13.50 | 1517 | -7.6 |
| 8 | Statkov, Kaloyan | 0 | BUL | +11B | +4N | −13B | −6N | +15B | +14N | 4.0 | 18.5 | 21.5 | 14.50 | 1575 | 0.0 |
| 9 | Zheleva, Eleonora | 1484 | BUL | =13B | +20N | −7B | =25N | +18B | +17N | 4.0 | 15.5 | 17.0 | 10.75 | 784 | -14.4 |
| 10 | FIDE 2974479 | 0 | — | +?N | −1B | +?N | −5B | +16N | +19B | 4.0 | 15.0 | 15.0 | 5.50 | 748 | 0.0 |
| 11 | Doychev, Nikola | 0 | BUL | −8N | +27B | +?N | −7N | +20B | +22B | 4.0 | 12.5 | 12.5 | 4.50 | 784 | 0.0 |
| 12 | Pazvantova, Emilia | 0 | BUL | +25B | −15N | −16B | +?N | =19N | +20B | 3.5 | 12.5 | 12.5 | 5.25 | 691 | 0.0 |
| 13 | Katsarski, Yan | 0 | BUL | =9N | +?B | +8N | =1B | −4B | −7N | 3.0 | 22.0 | 22.0 | 8.75 | 1332 | 0.0 |
| 14 | Hristov, Georgi | 1496 | BUL | +17B | +22N | −3N | +16B | −5N | −8B | 3.0 | 18.5 | 20.5 | 8.00 | 803 | -36.0 |
| 15 | Dimitrova, Ema | 1495 | BUL | +27N | +12B | −1N | −17B | −8N | +21B | 3.0 | 18.0 | 18.0 | 5.50 | 744 | -17.2 |
| 16 | Glazunov, Alexandr | 0 | BUL | −3N | +26B | +12N | −14N | −10B | +23B | 3.0 | 17.0 | 17.0 | 5.50 | 811 | 0.0 |
| 17 | Ivanov, Simon E. | 0 | BUL | −14N | +?B | +23N | +15N | −2B | −9B | 3.0 | 17.0 | 17.0 | 5.00 | 1323 | 0.0 |
| 18 | FIDE 2974428 | 0 | — | −5N | −19B | +27N | +21B | −9N | +?B | 3.0 | 12.5 | 12.5 | 2.00 | 717 | 0.0 |
| 19 | Gospodinov, Konstantin | 0 | BUL | −7B | +18N | −22B | +?N | =12B | −10N | 2.5 | 16.5 | 16.5 | 4.75 | 784 | 0.0 |
| 20 | Stoyanov, Krum | 0 | BUL | =?N | −9B | +?N | +23B | −11N | −12N | 2.5 | 13.5 | 13.5 | 2.00 | 683 | 0.0 |
| 21 | Grancharova, Katerina | 0 | BUL | −1N | +?B | −4B | −18N | +25B | −15N | 2.0 | 17.5 | 17.5 | 1.50 | 708 | 0.0 |
| 22 | Vasilev, Kaloyan K. | 0 | BUL | F | −14B | +19N | −4N | +24B | −11N | 2.0 | 16.0 | 16.0 | 4.50 | 728 | 0.0 |
| 23 | FIDE 2972620 | 0 | — | +?B | −2N | −17B | −20N | +26B | −16N | 2.0 | 13.5 | 13.5 | 0.00 | 725 | 0.0 |
| 24 | FIDE 2974410 | 0 | — | −2B | +25N | −6B | +?N | −22N | −?B | 2.0 | 12.5 | 12.5 | 1.50 | 725 | 0.0 |
| 25 | FIDE 2974436 | 0 | — | −12N | −24B | +26N | =9B | −21N | F | 1.5 | 11.5 | 11.5 | 2.00 | 1483 | 0.0 |
| 26 | FIDE 2974487 | 0 | — | −4B | −16N | −25B | F | −23N | F | 0.0 | 11.0 | 11.0 | 0.00 | 689 | 0.0 |
| 27 | FIDE 2971810 | 0 | — | −15B | −11N | −18B | −?B | F | −?N | 0.0 | 10.0 | 10.0 | 0.00 | 691 | 0.0 |
Key insights
Biggest movers and upsets — the story behind the numbers.
Top rating gainers
- 1Kaloyanov, KaloyanBUL+63.65.5 pts · #2
- 2Iliev, Iliya IlievBUL+8.85.0 pts · #6
- 3Danev, TsvetanBUL+8.84.5 pts · #11
Top rating losers
- 1Hristov, GeorgiBUL-36.03.0 pts · #14
- 2Dimitrova, EmaBUL-17.23.0 pts · #25
- 3Zheleva, EleonoraBUL-14.44.0 pts · #20
Biggest upsets
- R2+130 Elo gap
- R5+108 Elo gap