IRT Maipu
14 players participated in this 6-round tournament, held from 28 Nov 2025 to 30 Nov 2025 in Maipu- Mendoza, Argentina. Top 10 Elo average was 1473, and top seed was Guillermo Guardia (🇦🇷 ARG, 1965).
Santino Zambianchi (🇦🇷 ARG, 1905) won with 4.5/6, ahead of Guillermo Guardia (4.5) and Bautista Santino Herrera (4.0). Zambianchi shared the lead from round 5, winning on tie-break.
The biggest upset came in round 5: Sergio Portillo (1437) beat Juan Amarilla (1539), a +102-point gap.
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How it unfolded
Top 6 · 6 roundsTight race until R6; 2 players tied at 4.5/6, decided on Buchholz.
2 players finish on 4.5/6. Zambianchi takes the title on Buchholz Cut1 (18.0).
Santino Zambianchi lost to Guillermo Guardia (White).
Guillermo Guardia won 4 in a row (R1–R4).
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1Santino Zambianchi | * | 0 | ½ | 1 |
| 2Guillermo Guardia | 1 | * | 1 | 1 |
| 3Bautista Santino Herrera | ½ | 0 | * | — |
| 4Matias Guida | 0 | 0 | — | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | R6 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Zambianchi, Santino | 1905 | ARG | +9B | +5N | −2B | +7N | +4B | =3N | 4.5 | 18.0 | 20.0 | 13.50 | 1852 | -4.8 |
| 2 | Guardia, Guillermo | 1965 | ARG | +7N | +3B | +1N | +4B | F | =8B | 4.5 | 17.5 | 17.5 | 16.25 | 2058 | +9.8 |
| 3 | Herrera, Bautista Santino | 1615 | ARG | +11B | −2N | =7B | +5N | +9N | =1B | 4.0 | 16.5 | 18.0 | 10.00 | 1748 | +31.2 |
| 4 | Guida, Matias | 1812 | ARG | +12N | +8B | +6B | −2N | −1N | +9B | 4.0 | 16.5 | 17.5 | 8.50 | 1721 | -13.6 |
| 5 | Amarilla, Juan | 1539 | ARG | +10N | −1B | +8N | −3B | −6B | +12N | 3.0 | 16.0 | 17.0 | 5.50 | 1417 | -14.4 |
| 6 | Portillo, Sergio | 1437 | ARG | F | +14B | −4N | −10B | +5N | +11B | 3.0 | 10.5 | 10.5 | 4.50 | 1676 | +22.0 |
| 7 | Guliotti, Carlos | 1516 | ARG | −2B | +10N | =3N | −1B | F | +14N | 2.5 | 15.0 | 15.0 | 4.00 | 1539 | -0.6 |
| 8 | Minardo, Ariel | 1484 | ARG | +13N | −4N | −5B | +14B | F | =2N | 2.5 | 14.0 | 14.0 | 2.75 | 1472 | -2.6 |
| 9 | Lecea, Martin Ignacio | 1456 | ARG | −1N | F | +11B | +12N | −3B | −4N | 2.0 | 15.0 | 15.0 | 2.50 | 961 | -19.2 |
| 10 | Inchauspe, Tomas | 0 | ARG | −5B | −7B | +13N | +6N | F | F | 2.0 | 11.5 | 11.5 | 3.50 | 1372 | 0.0 |
| 11 | FIDE 20063881 | 0 | — | −3N | =13B | −9N | F | +14B | −6N | 1.5 | 9.5 | 9.5 | 0.25 | 703 | 0.0 |
| 12 | FIDE 20031467 | 0 | — | −4B | F | +14N | −9B | F | −5B | 1.0 | 9.0 | 9.0 | 0.00 | 802 | 0.0 |
| 13 | FIDE 20063997 | 0 | — | −8B | =11N | −10B | F | F | F | 0.5 | 6.0 | 6.0 | 0.75 | 684 | 0.0 |
| 14 | FIDE 20075030 | 0 | — | F | −6N | −12B | −8N | −11N | −7B | 0.0 | 10.5 | 10.5 | 0.00 | 679 | 0.0 |
Key insights
Biggest movers and upsets — the story behind the numbers.
- 1Herrera, Bautista SantinoARG+31.24.0 pts · #3
- 2Portillo, SergioARG+22.03.0 pts · #5
- 3Guardia, GuillermoARG+9.84.5 pts · #2
- 1Lecea, Martin IgnacioARG-19.22.0 pts · #11
- 2Amarilla, JuanARG-14.43.0 pts · #7
- 3Guida, MatiasARG-13.64.0 pts · #4
- R5+102 Elo gap