Noches Clasicas con el San Juan Chess Club - Jueves
15 players participated in this 5-round tournament, held from 12 Feb 2026 to 12 Mar 2026 in San Juan, Puerto Rico. 3 titled players. Top 10 Elo average was 1795, and top seed was Miguel A. Boggiano Pereira (π΅π· PUR, CM, 2060).
Miguel A. Boggiano Pereira (π΅π· PUR, CM, 2060) won with 3.5/5, ahead of Christian Z. Rivera Valentin (3.5) and Louis E. Carrion Perez (3.5). Boggiano Pereira shared the lead from round 1, winning on tie-break.
The biggest upset came in round 1: Oscar A. Serrano Rivera (1570) beat Alberto Llanos Martinez (1917), a +347-point gap.
- π₯
- π₯
- π₯
How it unfolded
Top 6 Β· 5 roundsTight race until R3; 3 players tied at 3.5/5, decided on Buchholz.
CM Miguel A. Boggiano Pereira held the sole lead from R3 through R5 without losing it.
3 players finish on 3.5/5. Boggiano Pereira takes the title on Buchholz Cut1 (11.0).
CM Miguel A. Boggiano Pereira won 3 in a row (R1βR3).
Key matchups Β· top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1CMMiguel A. Boggiano Pereira | * | β | 1 | β |
| 2Louis E. Carrion Perez | β | * | β | Β½ |
| 3Christian Z. Rivera Valentin | 0 | β | * | β |
| 4CMGabriel Pinales Roussel | β | Β½ | β | * |
Grille amΓ©ricaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | Pts | Bu C1 | Bu | SB | Perf | Ξ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Boggiano Pereira, Miguel A.CM | 2060 | PUR | +5B | +2N | +7B | =6N | F | 3.5 | 11.0 | 11.0 | 9.75 | 2099 | +3.2 |
| 2 | Rivera Valentin, Christian Z. | 1715 | PUR | +12N | β1B | =5N | +9B | +8N | 3.5 | 9.5 | 9.5 | 4.75 | 1814 | +8.8 |
| 3 | Carrion Perez, Louis E. | 1934 | PUR | F | +13B | =4N | +8B | +5N | 3.5 | 7.5 | 7.5 | 6.00 | 2011 | +7.0 |
| 4 | Pinales Roussel, GabrielCM | 1936 | PUR | F | +14N | =3B | =7N | +6B | 3.0 | 8.5 | 8.5 | 5.50 | 1980 | +6.4 |
| 5 | Rodriguez Rodriguez, Ian G. | 1660 | PUR | β1N | +12B | =2B | +10N | β3B | 2.5 | 11.5 | 11.5 | 2.75 | 1630 | -3.4 |
| 6 | Llanos Martinez, Alberto | 1917 | PUR | β8N | +10B | +9N | =1B | β4N | 2.5 | 10.0 | 11.0 | 4.25 | 1702 | -42.0 |
| 7 | Deliz Orengo, Arturo | 1759 | PUR | +10B | +8N | β1N | =4B | F | 2.5 | 9.5 | 9.5 | 4.50 | 1855 | +6.6 |
| 8 | Serrano Rivera, Oscar A. | 1570 | PUR | +6B | β7B | +11N | β3N | β2B | 2.0 | 12.0 | 12.5 | 3.00 | 1755 | +20.6 |
| 9 | Vera Perez, Gabriela S.WCM | 1588 | PUR | F | +15N | β6B | β2N | =11B | 1.5 | 6.5 | 6.5 | 0.25 | 1541 | -6.8 |
| 10 | FIDE 3110419 | 0 | β | β7N | β6N | +15B | β5B | F | 1.0 | 7.5 | 7.5 | 0.00 | 979 | 0.0 |
| 11 | Cruz Negron, Arcadio | 1810 | PUR | F | F | β8B | F | =9N | 0.5 | 3.5 | 3.5 | 0.75 | 1386 | -43.2 |
| 12 | Valentin Baez, Bryan Jay | 0 | PUR | β2B | β5N | F | F | F | 0.0 | 6.0 | 6.0 | 0.00 | 888 | 0.0 |
| 13 | Rivera Maldonado, Jose J. | 1518 | PUR | F | β3N | F | F | F | 0.0 | 3.5 | 3.5 | 0.00 | 1118 | -3.2 |
| 14 | Stuart, Sean | 1511 | PUR | F | β4B | F | F | F | 0.0 | 3.0 | 3.0 | 0.00 | 1113 | -3.2 |
| 15 | FIDE 3119521 | 0 | β | F | β9B | β10N | F | F | 0.0 | 3.0 | 3.0 | 0.00 | 788 | 0.0 |
Key insights
Biggest movers and upsets β the story behind the numbers.
- 1Serrano Rivera, Oscar A.PUR+20.62.0 pts Β· #5
- 2Rivera Valentin, Christian Z.PUR+8.83.5 pts Β· #4
- 3Carrion Perez, Louis E.PUR+7.03.5 pts Β· #2
- 1Cruz Negron, ArcadioPUR-43.20.5 pts Β· #10
- 2Llanos Martinez, AlbertoPUR-42.02.5 pts Β· #6
- 3Vera Perez, Gabriela S.WCMPUR-6.81.5 pts Β· #9
- R1+347 Elo gap
- R3+240 Elo gap