I recommend my books to practice tactics before playing OTB tournaments
Félög
Chess.com - Polska
52.866 Meðlimir
Chess.com Community
52.951 Meðlimir
Klub Zbigniewa Paklezy
4.289 Meðlimir
Esportovnia - PL club
220 Meðlimir
Erasmus+ Chess
1.145 Meðlimir