XXXV Open Internacional de Gros de Ajedrez

SwissStandard

49 players participated in this 9-round tournament, held from 05 Sept 2025 to 12 Sept 2025 in Donostia, Spain. 7 titled players from 4 federations. Top 10 Elo average was 2243, and top seed was Julio Javier Alonso Bouza (🇪🇸 ESP, IM, 2349).

Julio Javier Alonso Bouza (🇪🇸 ESP, IM, 2349) won with 7.0/9, ahead of Alex Odriozola Coscolin (6.5) and Ibai Sanz Gorospe (6.0). Alonso Bouza won solo starting round 5.

The biggest upset came in round 7: Xabier Yurramendi Sarasola (1477) beat Jon Vernier Urtasun (1891), a +414-point gap.

Location

🇪🇸Donostia, Spain

Dates

05 Sept 2025 → 12 Sept 2025

Time control

Standard: 90 minutes with 30 second increment from move 1

System

Swiss · 9 rounds

Top seed

🇪🇸IMJulio Javier Alonso Bouza2349

Avg top 10

2,243

Participants

49

Titled players · 7

IM×4

FM×2

WGM×1

Federations · 4 represented

🇪🇸Spain×44

🇨🇺Cuba×3

🇨🇴Colombia×1

🇩🇪Germany×1

Top 3

🥇
IMJulio Javier Alonso Bouza
🇪🇸ESP·2349
7.0pts·2346perf+0.9
🥈
Alex Odriozola Coscolin
🇪🇸ESP·2192
6.5pts·2225perf+15.0
🥉
Ibai Sanz Gorospe
🇪🇸ESP·2247
6.0pts·2194perf-12.8

How it unfolded

Top 6 · 9 rounds

IM Julio Javier Alonso Bouza led from R5; +0.5-point edge over the runner-up. Title race converged from 2 co-leaders at R4 to 1 by R5.

Co-leaders

23

10

3

2

1

1

1

1

1

Alonso Bouza7Odriozola Coscolin6.5Sanz Gorospe6Alonso Garcia6Forgas Moreno6Browning5.5

R5–R9 · LEAD HELD

IM Julio Javier Alonso Bouza held the sole lead from R5 through R9 without losing it.

R3 · HEAD-TO-HEAD · WINNER VS 2ND

IM Julio Javier Alonso Bouza beat Alex Odriozola Coscolin (Black).

WIN STREAKS · 2 top finishers

IM Julio Javier Alonso Bouza 5 wins (R1–R5)Alex Odriozola Coscolin 3 wins (R5–R7)

Key matchups · top 4

Head-to-head between the four finishers

Player	1	2	3	4
1IMJulio Javier Alonso Bouza	*	1	½	½
2Alex Odriozola Coscolin	0	*	½	—
3Ibai Sanz Gorospe	½	½	*	—
4IMRene Marcial Alonso Garcia	½	—	—	*

Grille américaine

#	Player	Elo	Fed	R1	R2	R3	R4	R5	R6	R7	R8	R9	Pts	Bu C1	Bu	SB	Perf	Δ
1	Alonso Bouza, Julio JavierIM	2349	ESP	+25N	+7B	+2N	+20B	+4N	=8N	=3B	=6B	=5N	7.0	45.0	48.5	37.00	2346	+0.9
2	Odriozola Coscolin, Alex	2192	ESP	+34B	+12N	−1B	=13B	+14N	+10N	+4B	=9N	=3B	6.5	43.5	46.5	31.50	2225	+15.0
3	Sanz Gorospe, Ibai	2247	ESP	+14B	+15N	=6B	−4N	+19B	+13N	=1N	=7B	=2N	6.0	44.0	48.0	29.75	2194	-12.8
4	Forgas Moreno, YanielaWGM	2195	CUB	+40N	+39B	+8N	+3B	−1B	+28N	−2N	=11B	=6N	6.0	41.5	44.0	25.25	2227	+12.6
5	Alonso Garcia, Rene MarcialIM	2251	CUB	+16N	+26B	=13N	−28B	=7N	=12B	+33N	+8N	=1B	6.0	38.5	41.5	27.25	2123	-10.8
6	Renteria Becerra, Jorge EliecerFM	2184	COL	+30N	+36B	=3N	F	=10B	=9N	+15B	=1N	=4B	5.5	41.0	41.0	26.00	2200	+8.6
7	Browning, Rebecca	1974	GER	+38B	−1N	+42B	=14N	=5B	+27N	+10B	=3N	−9B	5.5	40.5	42.5	21.75	2048	+18.4
8	Gimenez Lopez, Zuhaitz	2066	ESP	+49B	+19N	−4B	+25N	+12N	=1B	−11N	−5B	+27N	5.5	39.5	40.5	20.00	2065	+5.4
9	Vesga Izeta, MarkelFM	2259	ESP	+27B	−28N	=11N	F	+18B	=6B	+20N	=2B	+7N	5.5	38.5	42.0	26.00	2203	-7.0
10	Garcia Arana, Iker	1890	ESP	−21N	+44B	+17N	+32B	=6N	−2B	−7N	+14B	+33N	5.5	36.5	38.5	19.75	1874	-0.2
11	Del Rey, DiegoIM	2276	ESP	+46N	F	=9B	F	F	+25N	+8B	=4N	+13N	5.0	26.5	26.5	20.75	2341	+5.7
12	Izagirre Alsua, Aritz	1874	ESP	+45B	−2B	+21N	+15N	−8B	=5N	−22B	+23N	−18B	4.5	39.0	40.5	17.00	1863	0.0
13	Odriozola Coscolin, Dani	2139	ESP	+29B	+22N	=5B	=2N	=28N	−3B	F	+19N	−11B	4.5	38.5	38.5	19.50	2076	-15.6
14	Moreno Lazarev, Haritz	1695	ESP	−3N	+43B	+39N	=7B	−2B	=26N	=18B	−10N	+45B	4.5	36.0	37.5	12.75	1876	+73.6
15	Berdote Alonso, Carlos	1895	ESP	+43N	−3B	+16N	−12B	+17N	+24B	−6N	=27B	F	4.5	35.5	37.5	16.75	1871	-4.2
16	Rodriguez Alvarez, Hugo	1697	ESP	−5B	+41N	−15B	+45N	+26B	=18N	=19B	−20N	=30B	4.5	32.0	33.5	13.00	1826	+50.4
17	Lin, Zhian	1650	ESP	−20B	+45N	−10B	+48N	−15B	=23N	+32B	−18N	+25B	4.5	30.5	31.5	11.00	1706	+13.6
18	Zuloaga Erauskin, Markel	2006	ESP	+35N	=47B	F	F	−9N	=16B	=14N	+17B	+12N	4.5	28.0	28.0	17.25	1977	-0.4
19	Soto Avalos, Paulo	1780	ESP	+32N	−8B	=23N	+33B	−3N	+39B	=16N	−13B	F	4.0	33.5	36.0	12.75	1857	+20.8
20	Rodriguez Hernandez, Jose Angel	2082	CUB	+17N	+21B	+33N	−1N	F	F	−9B	+16B	F	4.0	32.5	32.5	16.00	2053	+3.2
21	Used Zabalegui, Iosu	1538	ESP	+10B	−20N	−12B	−38N	+48B	+29N	=25B	−36N	=26B	4.0	30.0	31.0	13.50	1721	+71.6
22	Perez Sodupe, Cecilia	1858	ESP	+23N	−13B	F	F	F	+37B	+12N	+30N	F	4.0	29.0	29.0	15.00	1980	+16.8
23	Yurramendi Sarasola, Xabier	1477	ESP	−22B	+34N	=19B	F	−24N	=17B	+39N	−12B	+46N	4.0	28.0	28.0	11.25	1767	+53.4
24	Lazkano Gaite, Tomas	1716	ESP	−47N	+38B	F	=26N	+23B	−15N	−30B	=45N	+32B	4.0	24.0	24.0	12.00	1678	-9.8
25	Vegas Garcia, Daniel	1775	ESP	−1B	+49N	+48N	−8B	+37N	−11B	=21N	−33B	−17N	3.5	33.0	34.0	7.00	1710	-39.2
26	Rodriguez Lima, Axel	1904	ESP	+37B	−5N	F	=24B	−16N	=14B	=35N	=42B	=21N	3.5	31.0	31.0	11.75	1682	-89.6
27	Bayona Jaime, Antonio	1708	ESP	−9N	+31B	F	F	+32N	−7B	+42N	=15N	−8B	3.5	29.5	29.5	10.75	1834	+14.8
28	Dorronsoro Arenas, Unai	1922	ESP	+31N	+9B	F	+5N	=13B	−4B	F	F	F	3.5	25.5	25.5	17.25	2230	+39.4
29	Koroteev, Mikhail	1651	ESP	−13N	−32B	+43N	=31B	=38N	−21B	+48N	−35B	=44B	3.5	24.5	25.5	7.00	1558	-45.6
30	Garcia Lopez, Pedro 2015	1652	ESP	−6B	F	−46N	+34N	+44B	F	+24N	−22B	=16N	3.5	24.5	24.5	11.25	1745	+30.0
31	Vallejo Perez, Urko	1564	ESP	−28B	−27N	+34B	=29N	−42B	−41N	F	+43B	+49N	3.5	20.5	20.5	7.75	1633	+25.2
32	Olaverri Ruiz, Imanol	0	ESP	−19B	+29N	+40B	−10N	−27B	F	−17N	+41B	−24N	3.0	29.5	29.5	8.00	1615	0.0
33	Lertxundi Azpiazu, Jon	1902	ESP	F	F	−20B	−19N	+41B	+36N	−5B	+25N	−10B	3.0	28.0	28.0	8.50	1832	-14.2
34	Rodriguez Alvarez, Aian	1670	ESP	−2N	−23B	−31N	−30B	=49B	F	=43N	+48B	+38N	3.0	24.0	24.0	5.00	1529	-67.6
35	Sanchez Huerta, Erlantz	1605	ESP	−18B	F	F	=42N	−39N	+38B	=26B	+29N	F	3.0	22.5	22.5	8.75	1793	+52.0
36	Esnaola Gaston, Fernando	1854	ESP	+48B	−6N	F	F	F	−33B	+41N	+21B	F	3.0	20.0	20.0	7.00	1796	-4.0
37	Campos Jimenez, Enrique	1557	ESP	−26N	=46B	F	F	−25B	−22N	=38N	+40B	+42N	3.0	19.5	19.5	6.50	1698	+23.2
38	Alcorta Andoaga, Illart	1571	ESP	−7N	−24N	F	+21B	=29B	−35N	=37B	=44N	−34B	2.5	28.0	28.0	8.25	1511	-14.4
39	Vernier Urtasun, Jon	1891	ESP	+41B	−4N	−14B	=44N	+35B	−19N	−23B	F	F	2.5	25.5	25.5	6.00	1586	-104.4
40	Onate del Moral, Daniel	1682	ESP	−4B	F	−32N	F	−45B	=44N	+49B	−37N	+41B	2.5	18.5	18.5	4.00	1577	-19.8
41	Monteanu Hristova, Damian	1542	ESP	−39N	−16B	+49B	F	−33N	+31B	−36B	−32N	−40N	2.0	23.0	23.0	4.50	1588	+8.0
42	Donazar Garayoa, Miguel	1740	ESP	F	F	−7N	=35B	+31N	F	−27B	=26N	−37B	2.0	22.0	22.0	6.75	1594	-23.8
43	Vazquez Altuna, Alfonso	1548	ESP	−15B	−14N	−29B	=49N	F	F	=34B	−31N	+48N	2.0	21.0	21.0	3.00	1488	-26.0
44	Rodriguez Aboy, Julen	1511	ESP	F	−10N	F	=39B	−30N	=40B	F	=38B	=29N	2.0	20.0	20.0	5.50	1597	+10.0
45	Franco Orbegozo, Alex	1481	ESP	−12N	−17B	F	−16B	+40N	F	F	=24B	−14N	1.5	24.5	24.5	4.50	1526	+9.6
46	Gonzalez Charola, Alfonso	1711	ESP	−11B	=37N	+30B	F	F	F	F	F	−23B	1.5	15.5	15.5	5.00	1612	-13.2
47	Argandona Riveiro, InigoIM	2340	ESP	+24B	=18N	F	F	F	F	F	F	F	1.5	8.5	8.5	6.25	2166	-3.0
48	Used Garzon, Ignacio Jesus	1420	ESP	−36N	F	−25B	−17B	−21N	+49N	−29B	−34N	−43B	1.0	24.5	24.5	1.00	1338	-27.6
49	Infante Arranz, Sergio	1630	ESP	−8N	−25B	−41N	=43B	=34N	−48B	−40N	F	−31B	1.0	23.0	23.0	2.50	1332	-114.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers

1Moreno Lazarev, HaritzESP
+73.6
4.5 pts · #13
2Used Zabalegui, IosuESP
+71.6
4.0 pts · #18
3Yurramendi Sarasola, XabierESP
+53.4
4.0 pts · #19

Top rating losers

1Infante Arranz, SergioESP
-114.0
1.0 pts · #49
2Vernier Urtasun, JonESP
-104.4
2.5 pts · #37
3Rodriguez Lima, AxelESP
-89.6
3.5 pts · #24

Biggest upsets

R7+414 Elo gap
Yurramendi Sarasola, Xabier1477 beat Vernier Urtasun, Jon1891
R1+352 Elo gap
Used Zabalegui, Iosu1538 beat Garcia Arana, Iker1890
R2+337 Elo gap
Dorronsoro Arenas, Unai1922 beat FMVesga Izeta, Markel2259