Show HN: Pawnch – Addicitve chess puzzles with explanations

Old school aesthetic and new learning concepts. The whole mastery plan consists of 18k puzzles. Split by each tactical concept, each piece, each square. Example: Unique chess squares: 64 Topic: M1 Unique pieces: 6 Puzzles: approx. 6*64 The coverage of squares is 85%, as some moves are mathematically impossible, and for some exotic positions, I did not find any quality puzzles. Have fun and master chess!