Mark Heimann vs Christopher Woojin Yoo
Mark Heimann (33, GM, USA) and Christopher Woojin Yoo (20, GM, USA) have never met in classical OTB, but played 9 rapid/blitz games on record. They share 15 common opponents with at least 3 games each side, providing a calibration of relative strength. With current classical ratings of 2479 and 2607, the Elo model gives Yoo a 51% chance of winning a classical game with white.
Head-to-Head Score
If they played today · Classical
Based on current Elo: 2479 vs 2607 (Δ -128)
With Mark Heimann as white
25% Mark24% draw51% Christopher
With Christopher Woojin Yoo as white
18% Mark20% draw62% Christopher
Estimate from Elo only · doesn't account for recent form, opening prep, or context.
Career Compare
| Mark Heimann | Christopher Woojin Yoo | |
|---|---|---|
| Current rating (STD) | 2479 | 2607 |
| Peak rating | 2520 · Sep 2025 | 2616 · Aug 2024 |
| Peak age | 32 | 18 |
| World rank now | #743 | #142 |
| World rank peak | #461 | #134 |
| Federation rank now | #51 | #16 |
| Games (career, STD) | 437 | 799 |
| Months active | 194 | 130 |
| % white wins | 61% | 52% |
| % black wins | 56% | 45% |
| TPR last 12m (STD) | 2403 | 2367 |
| Activity 12m (games) | 91 | 46 |
Best Win
Mark Heimann
Christopher Woojin Yoo
Highest-rated opponent ever beaten · STD primary, rapid/blitz for context
All Meetings (9)
Common Opponents
Tournaments Both Played
Cohort Position
Each player compared to active peers (same federation, ±75 Elo, played in last 12 months).
Mark Heimann
Christopher Woojin Yoo