1er Open International du Sancy

SwissStandard

70 players participated in this 9-round tournament, held from 05 Jul 2025 to 11 Jul 2025 in Besse Et Saint Anastaise, France. 3 titled players from 3 federations. Top 10 Elo average was 2204, and top seed was Gabriel Flom (🇫🇷 FRA, GM, 2455).

Anthony C. Kosten (🇬🇧 ENG, GM, 2368) won with 7.0/9, ahead of Gabriel Flom (6.5) and Valentin Racle (6.5). Kosten shared the lead from round 6 and won solo starting round 7.

The biggest upset came in round 3: Antoine Gauran (1514) beat Samuel Blanchard (1932), a +418-point gap.

Location

🇫🇷Besse Et Saint Anastaise, France

Dates

05 Jul 2025 → 11 Jul 2025

Time control

Standard: 90 minutes with 30 second increment from move 1

System

Swiss · 9 rounds

Top seed

🇫🇷GMGabriel Flom2455

Avg top 10

2,204

Participants

Titled players · 3

GM×2

CM×1

Federations · 3 represented

🇫🇷France×66

🇦🇺Australia×1

🇬🇧England×1

Top 3

🥇
GMAnthony C. Kosten
🇬🇧ENG·2368
7.0pts·2343perf-0.3
🥈
GMGabriel Flom
🇫🇷FRA·2455
6.5pts·2404perf-2.5
🥉
Valentin Racle
🇫🇷FRA·2150
6.5pts·2261perf+29.8

How it unfolded

Top 6 · 9 rounds

GM Anthony C. Kosten led from R7; +0.5-point edge over the runner-up. Title race converged from 2 co-leaders at R4 to 1 by R7.

Co-leaders

Kosten7Cameron6.5Pottier6.5Muller6.5Racle6.5Flom6.5

R7–R9 · LEAD HELD

GM Anthony C. Kosten held the sole lead from R7 through R9 without losing it.

R5 · HEAD-TO-HEAD · WINNER VS 2ND

GM Anthony C. Kosten drew with Alistair Cameron (Black).

WIN STREAKS · 2 top finishers

Alistair Cameron 3 wins (R1–R3)CM Simeon Pottier 3+3 wins (R1–R3, R7–R9)

Key matchups · top 4

Head-to-head between the four finishers

Player	1	2	3	4
1GMAnthony C. Kosten	*	½	—	1
2Alistair Cameron	½	*	0	—
3CMSimeon Pottier	—	1	*	—
4Etienne Muller	0	—	—	*

Grille américaine

#	Player	Elo	Fed	R1	R2	R3	R4	R5	R6	R7	R8	R9	Pts	Bu C1	Bu	SB	Perf	Δ
1	Kosten, Anthony C.GM	2368	ENG	+38N	+53B	=9N	+18B	=5N	+33B	+7N	=2B	=3N	7.0	45.0	48.0	35.25	2343	-0.3
2	Flom, GabrielGM	2455	FRA	+36B	F	+11N	+9B	=7N	+3B	+14N	=1N	=8B	6.5	47.0	47.0	37.25	2404	-2.5
3	Racle, Valentin	2150	FRA	+22N	+26B	+35N	+4B	=8B	−2N	=9N	+14B	=1B	6.5	46.5	50.5	34.50	2261	+29.8
4	Pottier, SimeonCM	2169	FRA	+25B	+17N	+6B	−3N	F	=16B	+10N	+5B	+33N	6.5	44.5	44.5	35.50	2234	+15.2
5	Cameron, Alistair	2149	AUS	+13B	+23N	+37B	−8N	=1B	+35N	+15B	−4N	+26B	6.5	43.0	47.0	31.00	2151	+6.2
6	Morel, Yoann	2039	FRA	+47N	+19B	−4N	+34B	−10N	=26B	+11N	+15B	+12B	6.5	42.5	46.0	31.25	2042	+9.2
7	Muller, Etienne	2197	FRA	+50B	+21N	=14B	+43N	=2B	+8N	−1B	=33B	+30N	6.5	41.5	45.0	30.25	2231	+15.0
8	Estadieu, Romeo	2172	FRA	+42N	+34B	+12N	+5B	=3N	−7B	F	+9B	=2N	6.0	45.5	45.5	32.50	2277	+24.0
9	Barberis, Valentin	2103	FRA	+32B	+27N	=1B	−2N	+17B	+30N	=3B	−8N	+21B	6.0	45.0	49.5	30.25	2143	+12.6
10	Weerheijm, Harry	1869	FRA	−43N	+39B	+20N	+19B	+6B	−14N	−4B	+44N	+24N	6.0	40.5	44.0	29.00	1940	+18.4
11	Deloire, Merovee	1859	FRA	+63B	+69N	−2B	=13N	+54B	=18N	−6B	+38N	+19B	6.0	37.5	38.5	20.50	1889	+7.6
12	Denaes, Antoine	2010	FRA	+29B	+24N	−8B	+21N	−14B	=20N	+28B	+16B	−6N	5.5	42.0	46.5	26.50	1966	-11.6
13	Esbelin, Alex-Henri	1655	FRA	−5N	+68B	+26N	=11B	−16N	=19B	+34N	=27B	=17B	5.0	40.5	42.0	20.25	1854	+39.4
14	Lahoche, Dorian	2126	FRA	+40N	+28B	=7N	=33B	+12N	+10B	−2B	−3N	—	5.0	39.5	43.5	25.25	2138	+5.2
15	Blanchard, Samuel	1932	FRA	+46B	=44N	−43B	+32N	+31B	+24B	−5N	−6N	=23B	5.0	39.0	42.5	21.75	1817	-22.4
16	Perrin, Alexis	1920	FRA	−54N	+46B	+44B	=17N	+13B	=4N	=18B	−12N	=20B	5.0	39.0	42.0	22.75	1842	-15.0
17	Ray, Valentin	1819	FRA	+68N	−4B	+61N	=16B	−9N	=22B	=29N	+47B	=13N	5.0	38.0	39.5	17.25	1796	-13.2
18	Lalitte, Raphael	1969	FRA	F	+49B	+51N	−1N	+28B	=11B	=16N	−30B	+27N	5.0	38.0	38.0	21.00	1934	-12.4
19	Bertin, Louis	1744	FRA	+52B	−6N	+65B	−10N	=40B	=13N	+54N	+35B	−11N	5.0	37.5	39.5	16.50	1734	-8.4
20	Tabutin, Lucas	1736	FRA	+45B	−37N	−10B	+46N	+34N	=12B	−26N	+31B	=16N	5.0	37.0	40.5	20.75	1844	+22.0
21	Morel, Yael	1836	FRA	+66N	−7B	+36N	−12B	+51N	+27B	−33N	+43B	−9N	5.0	37.0	39.0	17.00	1860	+10.0
22	Lahoche, Claire	1656	FRA	−3B	+67N	+23B	=48N	−30B	=17N	=53B	=28N	+44B	5.0	35.5	37.0	18.00	1849	+76.4
23	Chardaire, Mateo	1808	FRA	+55N	−5B	−22N	+29B	+61N	−37N	=46B	+45B	=15N	5.0	35.0	37.5	17.75	1737	-29.2
24	Delaruelle, Christian	1745	FRA	+70N	−12B	+69B	=30N	+53B	−15N	=35B	+48N	−10B	5.0	32.5	33.5	12.75	1847	+17.8
25	Schleifer, Julien	1662	FRA	−4N	+66B	−34N	+59B	−27N	+58B	−43N	+51B	+36N	5.0	31.0	33.0	14.50	1628	-12.8
26	Lamorelle, Alexey	1818	FRA	+62B	−3N	−13B	+49N	+36B	=6N	+20B	F	−5N	4.5	41.0	43.5	18.25	1860	+9.9
27	Conrath, Stephane	1771	FRA	+65B	−9B	+56N	−37N	+25B	−21N	+52B	=13N	−18B	4.5	36.0	38.0	15.50	1723	-11.2
28	Chaudagne, Jules	1790	FRA	+67B	−14N	=32B	+52N	−18N	+56B	−12N	=22B	=29N	4.5	35.5	37.0	14.50	1689	-21.0
29	Sassi, Leandro	1567	FRA	−12N	+70B	−31B	−23N	+55B	+36N	=17B	=53N	=28B	4.5	34.5	35.5	14.25	1718	+36.8
30	Bertin, Jean-Loup	1887	FRA	F	F	+60B	=24B	+22N	−9B	+31N	+18N	−7B	4.5	34.5	34.5	19.50	1982	+17.6
31	Robert, Thierry	1781	FRA	−69N	+63B	+29N	=35B	−15N	+45B	−30B	−20N	+40B	4.5	33.0	34.0	16.50	1733	-7.4
32	Poix, Christophe	1613	FRA	−9N	+55B	=28N	−15B	=60N	−34B	=58N	+57B	+45N	4.5	32.0	34.5	14.50	1655	+6.4
33	Gibaud, Elian	2149	FRA	F	+41B	F	=14N	+37B	−1N	+21B	=7N	−4B	4.0	41.5	41.5	18.75	2107	-7.2
34	Poizat, Gaspard	1835	FRA	+57B	−8N	+25B	−6N	−20B	+32N	−13B	+46N	—	4.0	35.5	38.5	16.00	1737	-38.4
35	Sauvadet, Herve	1892	FRA	+39B	+54N	−3B	=31N	+43B	−5B	=24N	−19N	—	4.0	35.0	38.0	15.25	1768	-22.2
36	Lombardo, Patrick	1702	FRA	−2N	+64B	−21B	+63N	−26N	−29B	+49N	+56N	−25B	4.0	34.5	37.0	11.50	1630	-18.0
37	Llapasset, Jean-Louis	1957	FRA	+56N	+20B	−5N	+27B	−33N	+23B	F	F	—	4.0	32.5	32.5	17.50	1988	+7.2
38	Mourgues, Joelle	1685	FRA	−1B	+57N	F	−51B	+64N	=52N	+39B	−11B	=43N	4.0	32.0	32.0	12.75	1688	+0.6
39	Bar, Christian	1517	FRA	−35N	−10N	−55B	+57B	+70N	+61B	−38N	−42B	+51N	4.0	29.5	30.5	9.50	1570	+5.0
40	Cohade, Albain	1639	FRA	−14B	−65N	+68B	+55N	=19N	−48B	=51N	+52B	−31N	4.0	29.0	30.5	11.50	1532	-18.8
41	Schmitt, Sylvain	1677	FRA	F	−33N	+58B	−53N	−56B	+59B	−45N	+64N	+46B	4.0	25.0	25.0	11.50	1648	-6.2
42	Boulier, Rene	1663	FRA	−8B	+62N	F	F	−52B	F	+70N	+39N	+53B	4.0	19.5	19.5	10.50	1933	+19.2
43	Gauran, Antoine	1514	FRA	+10B	F	+15N	−7B	−35N	F	+25B	−21N	=38B	3.5	35.5	35.5	18.00	1828	+98.8
44	Joli, Laurent	1738	FRA	+58N	=15B	−16N	−54B	+47N	+51B	F	−10B	−22N	3.5	33.5	33.5	12.00	1560	-27.6
45	Massardier, Mathys	0	FRA	−20N	−56B	=66N	+50B	+49B	−31N	+41B	−23N	−32B	3.5	33.0	35.0	12.00	1570	0.0
46	Raimbourg, Paul	1558	FRA	−15N	−16N	+62B	−20B	+69N	+60B	=23N	−34B	−41N	3.5	33.0	34.0	8.50	1572	+1.2
47	Roland, Philippe	1605	FRA	−6B	=52N	=49N	F	−44B	+67N	+57B	−17N	=58B	3.5	29.0	29.0	9.25	1562	-8.2
48	Noirel-Rousselot, Loic	1847	FRA	+59N	=51B	F	=22B	F	+40N	F	−24B	=50N	3.5	27.0	27.0	12.25	1705	-16.0
49	Sillero, Pierre	1591	FRA	F	−18N	=47B	−26B	−45N	+65N	−36B	+67N	+66B	3.5	26.0	26.0	7.25	1551	-7.4
50	Lavorel, Antoine	1679	FRA	−7N	F	−52B	−45N	F	+69B	+59N	+54B	=48B	3.5	23.0	23.0	8.25	1819	+25.6
51	Monteille-Giraudon, Lilou	0	FRA	+60B	=48N	−18B	+38N	−21B	−44N	=40B	−25N	−39B	3.0	34.0	36.5	10.25	1611	0.0
52	Gemarin, Baptiste	0	FRA	−19N	=47B	+50N	−28B	+42N	=38B	−27N	−40N	−56B	3.0	33.0	36.0	11.25	1558	0.0
53	Rollot, Jean-louis	1844	FRA	+64B	−1N	F	+41B	−24N	F	=22N	=29B	−42N	3.0	32.0	32.0	11.25	1668	-32.8
54	Rollot, Nathalie	1538	FRA	+16B	−35B	F	+44N	−11N	F	−19B	−50N	+55B	3.0	30.0	30.0	11.50	1681	+17.8
55	Morel, Ysaline	0	FRA	−23B	−32N	+39N	−40B	−29N	−70B	+69N	+59B	−54N	3.0	28.5	29.5	7.50	1433	0.0
56	Berger, Germain	1565	FRA	−37B	+45N	−27B	F	+41N	−28N	F	−36B	+52N	3.0	27.5	27.5	10.50	1539	-4.2
57	Cornille, Max	1402	FRA	−34N	−38B	F	−39N	+62B	+63B	−47N	−32N	+65B	3.0	27.0	27.0	7.00	1339	-19.2
58	Lavorel, Jean	0	FRA	−44B	F	−41N	+66B	F	−25N	=32B	+60N	=47N	3.0	25.0	25.0	8.50	1583	0.0
59	Laccore, Henri	1427	FRA	−48B	−60N	+70B	−25N	+65B	−41N	−50B	−55N	=68N	2.5	25.0	26.0	3.75	916	-16.2
60	Berger, Patrice	1706	FRA	−51N	+59B	−30N	F	=32B	−46N	F	−58B	+62N	2.5	23.5	23.5	7.25	1536	-36.8
61	Fourche, Bernard	1661	FRA	F	F	−17B	+65N	−23B	−39N	=64B	=66N	=63B	2.5	23.0	23.0	5.50	1375	-43.6
62	Delaruelle, Elisabeth	0	FRA	−26N	−42B	−46N	=67B	−57N	−68B	+65B	+69N	−60B	2.5	22.5	23.5	3.75	830	0.0
63	Vaudon, Marlene	1451	FRA	−11N	−31N	+67B	−36B	F	−57N	F	+70B	=61N	2.5	22.5	22.5	3.75	1313	-27.6
64	Rollot, Priscillia	1409	FRA	−53N	−36N	F	+69B	−38B	F	=61N	−41B	+67N	2.5	20.0	20.0	3.75	1341	-10.4
65	Bouchellit, Waiz	0	FRA	−27N	+40B	−19N	−61B	−59N	−49B	−62N	+68B	−57N	2.0	27.5	29.0	5.50	1297	0.0
66	Massardier, Nathan	1404	FRA	−21B	−25N	=45B	−58N	+68N	F	F	=61B	−49N	2.0	24.0	24.0	4.50	1364	-7.2
67	FIDE 544005865	0	—	−28N	−22B	−63N	=62N	F	−47B	+68N	−49B	−64B	1.5	25.5	25.5	2.75	783	0.0
68	Chabaud, Philippe	0	FRA	−17B	−13N	−40N	F	−66B	+62N	−67B	−65N	=59B	1.5	24.5	24.5	3.75	1224	0.0
69	Bouchellit, Marwan	0	FRA	+31B	−11B	−24N	−64N	−46B	−50N	−55B	−62B	F	1.0	30.5	30.5	4.50	1399	0.0
70	FIDE 560000660	0	—	−24B	−29N	−59N	F	−39B	+55N	−42B	−63N	—	1.0	25.5	25.5	3.00	767	0.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers

1Gauran, AntoineFRA
+98.8
3.5 pts · #31
2Lahoche, ClaireFRA
+76.4
5.0 pts · #26
3Esbelin, Alex-HenriFRA
+39.4
5.0 pts · #25

Top rating losers

1Fourche, BernardFRA
-43.6
2.5 pts · #53
2Poizat, GaspardFRA
-38.4
4.0 pts · #21
3Berger, PatriceFRA
-36.8
2.5 pts · #57

Biggest upsets

R3+418 Elo gap
Gauran, Antoine1514 beat Blanchard, Samuel1932
R1+382 Elo gap
Rollot, Nathalie1538 beat Perrin, Alexis1920
R1+355 Elo gap
Gauran, Antoine1514 beat Weerheijm, Harry1869