Thirteen lead after three rounds in Rijeka

Vallejo Pons, Jobava and Naiditsch are amongst the lucky thirteen on 3/3.
It's International Women's day today and the Kosintseva sisters were both amongst the leading pack before today's game.
Tatiana won her third game but sister Nadezhda drew. Arakhamia, Socko and Chelushkina make up the four on 100%.

Only one of the 2700+ players has 3/3, Francisco Vallejo Pons, who is finding the going a little easier than in his previous tournament!

1	GM	Navara David	CZE	2708	0-1	GM	Pelletier Yannick	SUI	2611
2	GM	Saric Ivan	CRO	2607	0-1	GM	Vallejo Pons Francisco	ESP	2708
3	GM	Potkin Vladimir	RUS	2606	0.5-0.5	GM	Adams Michael	ENG	2704
4	GM	Jobava Baadur	GEO	2695	1-0	GM	Kotronias Vasilios	GRE	2593
5	GM	Safarli Eltaj	AZE	2606	0-1	GM	Naiditsch Arkadij	GER	2691
6	GM	Aleksandrov Aleksej	BLR	2601	0.5-0.5	GM	Caruana Fabiano	ITA	2680
7	GM	Lupulescu Constantin	ROU	2598	0.5-0.5	GM	Kurnosov Igor	RUS	2674
8	GM	Areshchenko Alexander	UKR	2670	0.5-0.5	GM	Stocek Jiri	CZE	2591
9	GM	Erdos Viktor	HUN	2593	0.5-0.5	GM	Moiseenko Alexander	UKR	2668
10	GM	Inarkiev Ernesto	RUS	2667	1-0	GM	Bosiocic Marin	CRO	2577

There were 52 players on a perfect score but after the third round this number was down to 13.

In the Women's event Stefanova had dropped a half-point (in round 1 against Meri Arabidze 2292 from Georgia) but second to fourth seeds remained on 100%. The Kosintseva sisters both had the White pieces but while Tatiana won, second seed Nadezhda only drew. These weren't the only sisters on the leading boards, as Anna and Mariya Muzychuk were up there too, but both drew with Black today.

1	IM	Kosintseva Nadezhda	RUS	2554	0.5-0.5	IM	Moser Eva	AUT	2437
2	WGM	Zawadzka Jolanta	POL	2404	0.5-0.5	IM	Muzychuk Anna	SLO	2533
3	GM	Kosintseva Tatiana	RUS	2524	1-0	IM	Foisor Cristina-Adela	ROU	2433
4	WGM	Kovanova Baira	RUS	2385	0-1	GM	Socko Monika	POL	2465
5	WGM	Bodnaruk Anastasia	RUS	2384	0.5-0.5	IM	Skripchenko Almira	FRA	2456
6	GM	Arakhamia-Grant Ketevan	SCO	2447	1-0	IM	Romanko Marina	RUS	2409
7	IM	Sedina Elena	ITA	2334	0.5-0.5	IM	Muzychuk Mariya	UKR	2444
8	IM	Kovalevskaya Ekaterina	RUS	2438	0-1	WGM	Chelushkina Irina	SRB	2319
9	GM	Stefanova Antoaneta	BUL	2555	1-0	WIM	Schneider Veronika	HUN	2314

So the four players on 3/3 are Tatiana Kosintseva, Ketevan Arakhamia-Grant, Monika Socko and Irina Chelushkina with one game remaining.

More information on the official tournament site