II Campeonato Nacional de Ajedrez Amateur 2025 Sub 2300
Open SwissStandard
50 players participated in this 7-round tournament, held from 30 May 2025 to 01 Jun 2025 in Lima, Peru. 7 titled players. Top 10 Elo average was 2009, and top seed was Gerson Principe (🇵🇪 PER, FM, 2176).
Gary Calcina (🇵🇪 PER, 2158) won with 6.0/7, ahead of Gerson Principe (6.0) and Pamela Grace Casqui Lopez (5.0). Calcina shared the lead from round 1, winning on tie-break.
The biggest upset came in round 3: Koharu Aize Torres Arambulo (WCM, 1555) beat Julio Cesar Valles Aguilar (1795), a +240-point gap.
Location
🇵🇪Lima, Peru
Dates
30 May 2025 → 01 Jun 2025
Time control
Standard: 60 minutes with 30 seconds increment from move 1
System
Swiss · 7 rounds
Titled players · 7
FM×1
CM×2
WFM×1
WCM×3
Federations · 1 represented
🇵🇪Peru×48
Top 3
- 🥇
- 🥈
- 🥉
How it unfolded
Top 6 · 7 roundsTight race until R3; 2 players tied at 6.0/7, decided on Buchholz.
Co-leaders
17
5
1
1
1
1
2
R3–R7 · LEAD HELD
Gary Calcina held the sole lead from R3 through R7 without losing it.
R7 · TIEBREAK CLUSTER
2 players finish on 6.0/7. Calcina takes the title on Buchholz Cut1 (28.5).
R5 · HEAD-TO-HEAD · WINNER VS 2ND
Gary Calcina drew with FM Gerson Principe (Black).
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1Gary Calcina | * | ½ | 1 | — |
| 2FMGerson Principe | ½ | * | 1 | — |
| 3Pamela Grace Casqui Lopez | 0 | 0 | * | — |
| 4CMLeonardo Cahuapaza Tarapaca | — | — | — | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | R6 | R7 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Calcina, Gary | 2158 | PER | +29N | +3B | +6N | +4B | =2N | +11B | =9B | 6.0 | 28.5 | 30.5 | 25.25 | 2251 | +14.4 |
| 2 | Principe, GersonFM | 2176 | PER | +28B | =15N | +5B | +27N | =1B | +16N | +3B | 6.0 | 24.5 | 26.5 | 21.75 | 2211 | +5.6 |
| 3 | Casqui Lopez, Pamela Grace | 1873 | PER | +24B | −1N | +23B | +31N | +20B | +5N | −2N | 5.0 | 24.5 | 26.5 | 14.50 | 1957 | +36.8 |
| 4 | Robles Cerron, Sebastian | 1984 | PER | +19B | +14N | =27B | −1N | +13B | −9N | +15B | 4.5 | 25.5 | 27.5 | 16.00 | 1946 | -8.0 |
| 5 | Angulo, Alberto | 1910 | PER | +17N | +13B | −2N | +42B | =8N | −3B | +28N | 4.5 | 25.0 | 26.5 | 13.25 | 1885 | -1.6 |
| 6 | Poma Bernal, Cristian Andres | 1883 | PER | +22B | +10N | −1B | −20N | =25B | +37N | +17B | 4.5 | 22.0 | 23.5 | 13.25 | 1793 | -22.4 |
| 7 | Cahuapaza Tarapaca, LeonardoCM | 2085 | PER | +20B | −27N | +15B | =13N | =10B | +25N | =11N | 4.5 | 21.5 | 23.5 | 15.25 | 1911 | -48.8 |
| 8 | Ramirez Espino, Gian Sandro | 1809 | PER | +38B | =21N | =12B | +40N | =5B | =15N | =16B | 4.5 | 20.0 | 21.5 | 12.25 | 1878 | +26.4 |
| 9 | Bedoya Rosales, Luis | 1874 | PER | F | +35B | −18N | +33B | +39N | +4B | =1N | 4.5 | 19.5 | 19.5 | 13.00 | 2031 | +24.6 |
| 10 | Suarez Aybar, Miguel Angel | 1757 | PER | +48N | −6B | =41N | +44B | =7N | =18B | +31N | 4.5 | 17.0 | 17.0 | 7.75 | 1797 | +4.8 |
| 11 | Rojas Linares, Nicolas GabrielCM | 2050 | PER | +26N | +43B | =16N | +18B | F | −1N | =7B | 4.0 | 23.0 | 24.5 | 11.50 | 2051 | +5.6 |
| 12 | Acuna Alarcon, Claudia MicaelaWCM | 1793 | PER | F | =18B | =8N | +17B | −16N | +22B | +20N | 4.0 | 20.5 | 20.5 | 13.00 | 1862 | +23.2 |
| 13 | Machacca Mina, Adamaris LucianaWCM | 1750 | PER | +44B | −5N | +45B | =7B | −4N | =17N | +30B | 4.0 | 20.0 | 21.0 | 8.00 | 1740 | -2.8 |
| 14 | Valles Aguilar, Julio Cesar | 1795 | PER | +36N | −4B | −17N | F | +40B | +19N | +34B | 4.0 | 16.5 | 16.5 | 8.50 | 1794 | +1.8 |
| 15 | Meneses Morales, Marcos Beltran | 1871 | PER | +32N | =2B | −7N | +41B | =22N | =8B | −4N | 3.5 | 24.0 | 25.5 | 10.00 | 1798 | -20.0 |
| 16 | Villaverde Salas, Gonzalo Matias | 1879 | PER | +30N | F | =11B | =21N | +12B | −2B | =8N | 3.5 | 23.5 | 23.5 | 11.75 | 1938 | +22.4 |
| 17 | Torres Arambulo, Koharu AizeWCM | 1555 | PER | −5B | +38N | +14B | −12N | +29N | =13B | −6N | 3.5 | 23.0 | 24.5 | 9.50 | 1747 | +52.0 |
| 18 | Condori, Edwin | 1922 | PER | +23B | =12N | +9B | −11N | =27B | =10N | F | 3.5 | 21.5 | 21.5 | 12.25 | 1872 | -5.8 |
| 19 | Reynoso, Jorge | 1616 | PER | −4N | =36B | =22B | +48N | +30N | −14B | =23N | 3.5 | 17.0 | 17.0 | 5.25 | 1607 | -3.6 |
| 20 | Rojas Salas, Rihanna Irina | 1693 | PER | −7N | +32B | +37N | +6B | −3N | F | −12B | 3.0 | 22.0 | 23.5 | 8.00 | 1739 | +8.0 |
| 21 | Ccerhuayo Escobedo, Mels Leopold | 1966 | PER | +31N | =8B | +33N | =16B | F | F | F | 3.0 | 16.0 | 16.0 | 8.00 | 1935 | -1.4 |
| 22 | Sardon Aragon Alejandro Ulysses | 1551 | PER | −6N | +29B | =19N | F | =15B | −12N | =25B | 2.5 | 20.0 | 22.0 | 6.75 | 1702 | +37.6 |
| 23 | Vidalon, Raul | 1566 | PER | −18N | +48B | −3N | −37B | +50N | F | =19B | 2.5 | 15.5 | 15.5 | 1.75 | 1531 | -3.6 |
| 24 | Belahonia Bravo, Renzo Jose | 1488 | PER | −3N | =26B | F | −25N | −34B | +44N | +37B | 2.5 | 15.0 | 16.0 | 3.75 | 1452 | -8.0 |
| 25 | Jimenez Salas, Fabiana | 1692 | PER | F | F | =44N | +24B | =6N | −7B | =22N | 2.5 | 15.0 | 15.0 | 6.50 | 1755 | +9.2 |
| 26 | Yrivarren Paz, Martin Fernando | 1642 | PER | −11B | =24N | F | F | F | +38N | +32B | 2.5 | 10.0 | 10.0 | 4.75 | 1651 | -2.8 |
| 27 | Guzman Vera, Diego Alonso | 1845 | PER | F | +7B | =4N | −2B | =18N | F | F | 2.0 | 22.0 | 22.0 | 8.50 | 2042 | +39.2 |
| 28 | Oquiche Huarcaya, Ariana | 1719 | PER | −2N | +30B | F | F | +36N | F | −5B | 2.0 | 18.0 | 18.0 | 3.50 | 1715 | -2.4 |
| 29 | Zevallos Cordova, Enrique Ruben Oscar | 1694 | PER | −1B | −22N | +32B | +45N | −17B | F | F | 2.0 | 17.5 | 17.5 | 3.00 | 1538 | -44.4 |
| 30 | Vasquez Torre, Luis Eduardo | 1491 | PER | −16B | −28N | +50B | +49N | −19B | F | −13N | 2.0 | 14.5 | 14.5 | 0.00 | 942 | -32.4 |
| 31 | Stuart Llanos, Alejandro Jose | 1599 | PER | −21B | +50N | F | −3B | F | +45N | −10B | 2.0 | 13.5 | 13.5 | 1.00 | 1560 | -6.0 |
| 32 | Meneses Morales, Pilar Nicolle | 1423 | PER | −15B | −20N | −29N | +47B | −46N | +49B | −26N | 2.0 | 12.5 | 12.5 | 0.50 | 937 | 0.0 |
| 33 | Balvin, Jorge | 1679 | PER | F | +39N | −21B | −9N | F | +36B | F | 2.0 | 10.5 | 10.5 | 3.00 | 1690 | -0.2 |
| 34 | Bendezu Yupanqui, Albert Martin | 1958 | PER | F | F | F | F | +24N | +39B | −14N | 2.0 | 8.0 | 8.0 | 4.00 | 1777 | -21.2 |
| 35 | Bejarano Martinez, Diego | 1679 | PER | F | −9N | F | F | F | +47B | +45N | 2.0 | 6.0 | 6.0 | 1.50 | 1646 | -1.4 |
| 36 | Infantas Arevalo, Thiago Edu | 0 | PER | −14B | =19N | F | F | −28B | −33N | +47B | 1.5 | 15.5 | 16.0 | 2.25 | 1380 | -16.4 |
| 37 | Ortiz Velayarce, Oscar Fabian | 0 | PER | F | F | −20B | +23N | =42N | −6B | −24N | 1.5 | 14.0 | 14.0 | 3.25 | 1489 | +6.0 |
| 38 | Herrada Blanco, Luciana Franchesca | 0 | PER | −8N | −17B | F | F | =47N | −26B | +49N | 1.5 | 12.5 | 12.5 | 0.25 | 868 | 0.0 |
| 39 | Usurin Vara, Diego Sebasitan | 1606 | PER | F | −33B | +47N | F | −9B | −34N | =40B | 1.5 | 11.5 | 11.5 | 1.25 | 1431 | -32.8 |
| 40 | Oropeza Ortega, Jacob Tiziano | 1502 | PER | F | F | F | −8B | −14N | +48B | =39N | 1.5 | 11.0 | 11.0 | 0.75 | 1462 | -6.0 |
| 41 | Ygarza Crisostomo, Antonela Abigail | 1495 | PER | F | F | =10B | −15N | +44N | F | F | 1.5 | 9.0 | 9.0 | 3.25 | 1621 | +4.6 |
| 42 | Guevara Vertiz, Ariana Valentina | 1599 | PER | F | F | +49B | −5N | =37B | F | F | 1.5 | 8.0 | 8.0 | 0.75 | 1110 | -5.6 |
| 43 | Benavides Conza, Diego Angelo | 1859 | PER | +50B | −11N | F | F | F | F | =44B | 1.5 | 7.0 | 7.0 | 0.50 | 1250 | -5.0 |
| 44 | Pinedo Garces, Luis Fernando | 0 | PER | −13N | F | =25B | −10N | −41B | −24B | =43N | 1.0 | 16.5 | 16.5 | 2.00 | 1401 | -84.0 |
| 45 | Mesta Alvarado, Marco Tulio | 1441 | PER | F | F | −13N | −29B | +49N | −31B | −35B | 1.0 | 10.0 | 10.0 | 0.00 | 881 | -29.2 |
| 46 | Mostacero Velarde, IsabellaWFM | 1785 | PER | F | F | F | F | +32B | F | F | 1.0 | 5.0 | 5.0 | 2.00 | 2221 | +2.0 |
| 47 | Fasanando Ricci, Isaac Gabriel | 0 | PER | F | F | −39B | −32N | =38B | −35N | −36N | 0.5 | 10.5 | 10.5 | 0.75 | 768 | 0.0 |
| 48 | FIDE 3882292 | 0 | — | −10B | −23N | F | −19B | F | −40N | F | 0.0 | 16.0 | 16.0 | 0.00 | 810 | 0.0 |
| 49 | FIDE 81460694 | 0 | — | F | F | −42N | −30B | −45B | −32N | −38B | 0.0 | 11.5 | 11.5 | 0.00 | 682 | 0.0 |
| 50 | Callupe Matias, Rebeca Victoria | 0 | PER | −43N | −31B | −30N | F | −23B | F | F | 0.0 | 8.0 | 8.0 | 0.00 | 828 | 0.0 |
Key insights
Biggest movers and upsets — the story behind the numbers.
Top rating gainers
- 1Torres Arambulo, Koharu AizeWCMPER+52.03.5 pts · #19
- 2Guzman Vera, Diego AlonsoPER+39.22.0 pts · #23
- 3Sardon Aragon Alejandro UlyssesPER+37.62.5 pts · #20
Top rating losers
- 1Pinedo Garces, Luis FernandoPER-84.01.0 pts · #33
- 2Cahuapaza Tarapaca, LeonardoCMPER-48.84.5 pts · #4
- 3Zevallos Cordova, Enrique Ruben OscarPER-44.42.0 pts · #22
Biggest upsets
- R3+240 Elo gap
- R2+240 Elo gap
- R4+190 Elo gap