Alexander Krastev vs Ruben Gideon Koellner
Alexander Krastev (21, IM, GER) and Ruben Gideon Koellner (22, IM, GER) have met 7 times in classical OTB plus 1 rapid/blitz game. Krastev leads the classical series 2–1 (4 draws). With current classical ratings of 2428 and 2530, the Elo model gives Koellner a 47% chance of winning a classical game with white.
Head-to-Head Score
If they played today · Classical
Based on current Elo: 2428 vs 2530 (Δ -102)
With Alexander Krastev as white
28% Alexander25% draw47% Ruben
With Ruben Gideon Koellner as white
21% Alexander21% draw58% Ruben
Estimate from Elo only · doesn't account for recent form, opening prep, or context.
Career Compare
| Alexander Krastev | Ruben Gideon Koellner | |
|---|---|---|
| Current rating (STD) | 2428+3 | 2530+24 |
| Peak rating | 2470 · Jan 2024 | 2530 · May 2026 |
| Peak age | 19 | 22 |
| World rank now | #1,267 | #408 |
| World rank peak | #887 | #408 |
| Federation rank now | #78 | #21 |
| Games (career, STD) | 893 | 1,190 |
| Months active | 141 | 138 |
| % white wins | 50% | 53% |
| % black wins | 47% | 46% |
| TPR last 12m (STD) | 2415 | 2513 |
| Activity 12m (games) | 146 | 150 |
Best Win
Alexander Krastev
Ruben Gideon Koellner
Highest-rated opponent ever beaten · STD primary, rapid/blitz for context
All Meetings (8)
Common Opponents
Tournaments Both Played
Cohort Position
Each player compared to active peers (same federation, ±75 Elo, played in last 12 months).
Alexander Krastev
Ruben Gideon Koellner