Mark Biernacki vs Donald Johnson
Mark Biernacki (29, USA) and Donald Johnson (20, FM, USA) have met 2 times in classical OTB plus 6 rapid/blitz games. Johnson leads the classical series 2–0 (0 draws). With current classical ratings of 1974 and 2286, the Elo model gives Johnson a 77% chance of winning a classical game with white.
Head-to-Head Score
If they played today · Classical
Based on current Elo: 1974 vs 2286 (Δ -312)
With Mark Biernacki as white
10% Mark13% draw77% Donald
With Donald Johnson as white
7% Mark11% draw83% Donald
Estimate from Elo only · doesn't account for recent form, opening prep, or context.
Career Compare
| Mark Biernacki | Donald Johnson | |
|---|---|---|
| Current rating (STD) | 1974 | 2286 |
| Peak rating | 2014 · Feb 2018 | 2362 · Apr 2025 |
| Peak age | 21 | 19 |
| World rank now | #31,871 | #4,521 |
| World rank peak | #24,287 | #2,455 |
| Federation rank now | #882 | #188 |
| Games (career, STD) | 136 | 502 |
| Months active | 113 | 90 |
| % white wins | 52% | 50% |
| % black wins | 43% | 44% |
| TPR last 12m (STD) | 1440 | 2239 |
| Activity 12m (games) | 1 | 42 |
Best Win
Mark Biernacki
Donald Johnson
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).
Mark Biernacki
Donald Johnson