"I fear not the man who has practiced 10.000 openings once, but I fear the man who has practiced one opening 10.000 times."
Clubs
Chess.com - Polska
49.928 Membres
MARIANCZELLO CLUB
48.682 Membres
Infoszach
7.780 Membres
Polski Związek Szachowy
24.618 Membres
Chess University - Poland
1.670 Membres