chess amateur player and arbiter (regional class), in chess.com superadmin of Team Warsaw (since Nov 2018), admin of Vatican City team (Jan-Dec 2018)
Kelab-kelab
Liga Team Poland
287 Ahli
Middle-earth
176 Ahli
Team Warsaw
76 Ahli
World Cities League HQ
565 Ahli
World League Headquarters
658 Ahli