4e Open International d'Echecs d'Automne d'Ajaccio

Open SwissStandard

45 players participated in this 6-round tournament, held on 18 Oct 2025 in Ajaccio, France. 1 titled players from 2 federations. Top 10 Elo average was 1898, and top seed was Fiona Steil-Antoni (🇱🇺 LUX, WIM, 2079).

Jean-Michel Bigonnet (🇫🇷 FRA, 2074) won with 5.5/6, ahead of Fiona Steil-Antoni (5.0) and Guillaume Paoli (5.0). Bigonnet won solo starting round 5.

The biggest upset came in round 1: Thierry Gademann (1447) beat Jean-Philippe Orsoni (1895), a +448-point gap.

Location

🇫🇷Ajaccio, France

Dates

18 Oct 2025

Time control

Standard: 90 minutes with 30 second increment from move 1

System

Swiss · 6 rounds

Top seed

🇱🇺WIMFiona Steil-Antoni2079

Avg top 10

1,898

Participants

Titled players · 1

WIM×1

Federations · 2 represented

🇫🇷France×36

🇱🇺Luxembourg×1

Top 3

🥇
Jean-Michel Bigonnet
🇫🇷FRA·2074
5.5pts·2209perf+14.8
🥈
WIMFiona Steil-Antoni
🇱🇺LUX·2079
5.0pts·2120perf+8.0
🥉
Guillaume Paoli
🇫🇷FRA·1828
5.0pts·1971perf+22.8

How it unfolded

Top 6 · 6 rounds

Jean-Michel Bigonnet led from R5; +0.5-point edge over the runner-up. Title race converged from 3 co-leaders at R4 to 1 by R5.

Co-leaders

Bigonnet5.5Paoli5Steil-Antoni5Boue4.5Cristofari4.5Orsoni4.5

R5–R6 · LEAD HELD

Jean-Michel Bigonnet held the sole lead from R5 through R6 without losing it.

WIN STREAKS · 3 top finishers

Jean-Michel Bigonnet 5 wins (R1–R5)Guillaume Paoli 3 wins (R4–R6)WIM Fiona Steil-Antoni 4 wins (R1–R4)

Key matchups · top 4

Head-to-head between the four finishers

Player	1	2	3	4
1Jean-Michel Bigonnet	*	—	1	1
2Guillaume Paoli	—	*	0	—
3WIMFiona Steil-Antoni	0	1	*	—
4Philippe Boue	0	—	—	*

Grille américaine

#	Player	Elo	Fed	R1	R2	R3	R4	R5	R6	Pts	Bu C1	Bu	SB	Perf	Δ
1	Bigonnet, Jean-Michel	2074	FRA	+20B	+11N	+10B	+5N	+2B	=4N	5.5	22.0	25.0	22.75	2209	+14.8
2	Steil-Antoni, FionaWIM	2079	LUX	+30N	+32B	+3N	+8B	−1N	+9B	5.0	20.5	22.5	17.00	2120	+8.0
3	Paoli, Guillaume	1828	FRA	+24N	+19B	−2B	+12N	+13B	+8N	5.0	20.0	23.0	18.00	1971	+22.8
4	Cristofari, Antoine	2041	FRA	+23N	+18B	+15N	+9B	−8N	=1B	4.5	20.0	23.0	16.25	2009	-0.2
5	Boue, Philippe	0	FRA	+21N	+6B	+32N	−1B	=15N	+18B	4.5	19.5	21.5	14.25	1773	0.0
6	Gil, Jean-Jacques	1613	FRA	+36B	−5N	+23B	+34N	+10B	=11N	4.5	17.5	19.5	13.00	1905	+25.8
7	Orsoni, Jean-Philippe	1895	FRA	−22N	+40B	+30N	=11B	+19N	+15B	4.5	15.5	16.5	11.50	1722	-16.4
8	Paris, Romain	1937	FRA	+25B	+12N	+31B	−2N	+4B	−3B	4.0	21.5	23.5	13.50	1919	+1.6
9	Soetewey, Patrick	1885	FRA	+27B	+14N	+13B	−4N	+20B	−2N	4.0	20.5	23.5	14.00	1847	-0.4
10	Carrolaggi, Xavier	1740	FRA	+26N	+16B	−1N	+18B	−6N	+19B	4.0	19.5	22.5	12.50	1720	-3.0
11	Paris, Lisandre	1602	FRA	+42N	−1B	+22N	=7N	+31B	=6B	4.0	19.5	20.5	10.50	1811	+49.2
12	Zyskowski, Jean-Luc	1529	FRA	+28N	−8B	+24N	−3B	+22N	+21B	4.0	18.0	21.0	12.00	1752	+27.6
13	Appietto, Andria	1675	FRA	+40N	+39B	−9N	+16B	−3N	+24B	4.0	16.5	17.5	8.50	1655	-3.6
14	Pantalacci, Antoine Marie	1524	FRA	+33N	−9B	+38N	−15B	+39B	+20N	4.0	13.5	14.5	7.00	1582	+4.8
15	Meyssonnier, Patrick	1713	FRA	+37B	+34N	−4B	+14N	=5B	−7N	3.5	19.5	20.5	9.25	1740	+1.8
16	Paris, Cyrille	1506	FRA	+38B	−10N	+37B	−13N	=17B	+25N	3.5	15.5	16.5	6.75	1564	+13.6
17	Jaulneau, Christophe	1700	FRA	−29B	F	+26N	+28B	=16N	+32B	3.5	14.5	14.5	9.75	1721	+1.0
18	Tiebot, Jean-marc	1525	FRA	+41B	−4N	+25B	−10N	+27B	−5N	3.0	19.0	20.0	7.00	1644	+10.0
19	Franchi, Ange Marie	1518	FRA	+35B	−3N	+27B	+31N	−7B	−10N	3.0	18.5	20.5	7.00	1654	+22.0
20	Bastiani, Camille	1497	FRA	−1N	+42B	+21N	+30B	−9N	−14B	3.0	18.5	19.5	6.00	1652	+24.4
21	Battesti, Leo	1786	FRA	−5B	+29N	−20B	+37N	+23B	−12N	3.0	17.5	18.5	7.00	1366	-30.8
22	Gademann, Thierry	1447	FRA	+7B	−31N	−11B	+35N	−12B	+39N	3.0	16.5	17.5	7.50	1483	+1.4
23	Touilleux, Jade	1458	FRA	−4B	+45N	−6N	+26B	−21N	+38B	3.0	16.0	16.0	4.00	942	-18.4
24	Bourriot, Nathalie	1421	FRA	−3B	+41N	−12B	+44N	+34B	−13N	3.0	16.0	16.0	3.00	1433	-1.6
25	Costa, Mario	1455	FRA	−8N	+28B	−18N	+33B	+32N	−16B	3.0	15.5	17.5	7.00	1423	-16.0
26	Madore, Leo	0	FRA	−10B	+35N	−17B	−23N	+44B	+31N	3.0	14.5	14.5	4.00	1460	0.0
27	Bastiani, Olivier	1426	FRA	−9N	+33B	−19N	+38B	−18N	+35B	3.0	14.0	15.0	5.00	833	-30.8
28	Machecourt, Teano	0	FRA	−12B	−25N	+43B	−17N	+37B	+34N	3.0	13.5	14.5	4.00	1354	0.0
29	Bras Freitas, Ruben Miguel	0	FRA	+17N	−21B	F	F	+33N	+30B	3.0	10.5	10.5	7.50	1681	0.0
30	Miniconi, Luca	1498	FRA	−2B	+36N	−7B	−20N	+41B	−29N	2.0	17.5	18.5	3.00	973	-24.8
31	Costa, Laurent Jacques	1706	FRA	+43N	+22B	−8N	−19B	−11N	−26B	2.0	17.0	18.0	4.00	1442	-59.6
32	Mariot, Noel	1570	FRA	+45B	−2N	−5B	+41N	−25B	−17N	2.0	17.0	17.0	1.00	917	-40.8
33	Pieri, Carl`andria	0	FRA	−14B	−27N	+36B	−25N	−29B	+37N	2.0	15.0	16.0	3.00	679	0.0
34	De Jaegher, Luka	1510	FRA	+44N	−15B	+39N	−6B	−24N	−28B	2.0	15.0	15.0	1.00	781	-46.4
35	Pieri, Liora	0	FRA	−19N	−26B	+42N	−22B	+36B	−27N	2.0	14.0	15.0	3.00	673	0.0
36	Castro Pinto, Miguel Angelo	0	FRA	−6N	−30B	−33N	+40B	−35N	+44B	2.0	11.5	11.5	1.00	753	0.0
37	FIDE 560022370	0	—	−15N	+44B	−16N	−21B	−28N	−33B	1.0	15.0	15.0	0.00	861	0.0
38	FIDE 560022353	0	—	−16N	F	−14B	−27N	+42B	−23N	1.0	14.5	14.5	1.00	668	0.0
39	FIDE 560022361	0	—	F	−13N	−34B	+43N	−14N	−22B	1.0	14.0	14.0	1.00	736	0.0
40	FIDE 560022310	0	—	−13B	−7N	−41B	−36N	+45B	−42N	1.0	12.5	12.5	0.00	987	0.0
41	FIDE 80427090	0	—	−18N	−24B	+40N	−32B	−30N	−43B	1.0	11.0	12.0	1.00	704	0.0
42	Colonna Cesari, Maxime	0	FRA	−11B	−20N	−35B	F	−38N	+40B	1.0	11.0	11.0	1.00	765	0.0
43	FIDE 544099240	0	—	−31B	F	−28N	−39B	F	+41N	1.0	7.0	7.0	1.00	935	0.0
44	FIDE 560022345	0	—	−34B	−37N	F	−24B	−26N	−36N	0.0	11.0	11.0	0.00	656	0.0
45	FIDE 560022329	0	—	−32N	−23B	F	F	−40N	F	0.0	6.0	6.0	0.00	701	0.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers

1Paris, LisandreFRA
+49.2
4.0 pts · #10
2Zyskowski, Jean-LucFRA
+27.6
4.0 pts · #12
3Gil, Jean-JacquesFRA
+25.8
4.5 pts · #9

Top rating losers

1Costa, Laurent JacquesFRA
-59.6
2.0 pts · #23
2De Jaegher, LukaFRA
-46.4
2.0 pts · #43
3Mariot, NoelFRA
-40.8
2.0 pts · #35

Biggest upsets

R1+448 Elo gap
Gademann, Thierry1447 beat Orsoni, Jean-Philippe1895
R3+289 Elo gap
Bastiani, Camille1497 beat Battesti, Leo1786
R6+257 Elo gap
Zyskowski, Jean-Luc1529 beat Battesti, Leo1786