Ioannis K. Kollias vs Dimitrios Zaronikas
Ioannis K. Kollias (24, GRE) and Dimitrios Zaronikas (22, GRE) have met 8 times in classical OTB plus 22 rapid/blitz games. Zaronikas leads the classical series 5–3 (0 draws). With current classical ratings of 2091 and 2079, the Elo model gives Kollias a 46% chance of winning a classical game with white.
Head-to-Head Score
If they played today · Classical
Based on current Elo: 2091 vs 2079 (Δ +12)
With Ioannis K. Kollias as white
46% Ioannis22% draw32% Dimitrios
With Dimitrios Zaronikas as white
35% Ioannis24% draw41% Dimitrios
Estimate from Elo only · doesn't account for recent form, opening prep, or context.
Career Compare
| Ioannis K. Kollias | Dimitrios Zaronikas | |
|---|---|---|
| Current rating (STD) | 2091 | 2079 |
| Peak rating | 2091 · May 2026 | 2089 · Aug 2025 |
| Peak age | 24 | 21 |
| World rank now | #16,226 | #17,424 |
| World rank peak | #16,225 | #15,967 |
| Federation rank now | #210 | #227 |
| Games (career, STD) | 523 | 379 |
| Months active | 152 | 155 |
| % white wins | 64% | 59% |
| % black wins | 62% | 53% |
| TPR last 12m (STD) | 2070 | 1735 |
| Activity 12m (games) | 145 | 6 |
Best Win
Ioannis K. Kollias
Dimitrios Zaronikas
Highest-rated opponent ever beaten · STD primary, rapid/blitz for context
All Meetings (30)
Common Opponents
Tournaments Both Played
Cohort Position
Each player compared to active peers (same federation, ±75 Elo, played in last 12 months).
Ioannis K. Kollias
Dimitrios Zaronikas