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)
Klubai
Liga Team Poland
287 Nariai (-ių)
Middle-earth
176 Nariai (-ių)
Team Warsaw
76 Nariai (-ių)
World Cities League HQ
565 Nariai (-ių)
World League Headquarters
658 Nariai (-ių)