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)
Klublar
Liga Team Poland
287 Üzv
Middle-earth
176 Üzv
Team Warsaw
76 Üzv
World Cities League HQ
565 Üzv
World League Headquarters
658 Üzv