Alejandro Montalvo Rosario vs Mark Machin Rivera
Alejandro Montalvo Rosario (58, IM, PUR) and Mark Machin Rivera (37, IM, PUR) have met 13 times in classical OTB. Machin Rivera leads with 7 wins to 1, with 5 draws — a 38% draw rate. Their last meeting at Campeonato de Puerto Rico 2016 drew. With current classical ratings of 2143 and 2341, the Elo model gives Machin Rivera a 63% chance of winning a classical game with white.
Head-to-Head Score
If they played today · Classical
Based on current Elo: 2143 vs 2341 (Δ -198)
With Alejandro Montalvo Rosario as white
19% Alejandro18% draw63% Mark
With Mark Machin Rivera as white
13% Alejandro15% draw72% Mark
Estimate from Elo only · doesn't account for recent form, opening prep, or context.
Career Compare
| Alejandro Montalvo Rosario | Mark Machin Rivera | |
|---|---|---|
| Current rating (STD) | 2143 | 2341 |
| Peak rating | 2299 · Dec 2013 | 2377 · Jun 2016 |
| Peak age | 45 | 27 |
| World rank now | #14,175 | #3,672 |
| World rank peak | #5,005 | #2,694 |
| Federation rank now | #7 | #1 |
| Games (career, STD) | 329 | 313 |
| Months active | 217 | 194 |
| % white wins | 58% | 54% |
| % black wins | 51% | 49% |
| TPR last 12m (STD) | — | — |
| Activity 12m (games) | 0 | 0 |
Best Win
Alejandro Montalvo Rosario
Mark Machin Rivera
Highest-rated opponent ever beaten · STD primary, rapid/blitz for context
All Meetings (15)
Common Opponents
Tournaments Both Played
Cohort Position
Each player compared to active peers (same federation, ±75 Elo, played in last 12 months).
Alejandro Montalvo Rosario
Mark Machin Rivera