With a physical book, you look at diagram #347, guess the move, then flip to the back to see if you were right. With a PGN file, you load the position into , Chess.com , or SCID . You physically drag the piece to the square. If you are wrong, the engine shouts at you instantly.

: Double attack, discovered attack, pins, skewers, deflection, and decoy sacrifices.

The book 1001 Chess Exercises for Beginners by Franco Masetti and Roberto Messa is widely regarded as an excellent tactics workbook. When converted into , it becomes a highly practical, interactive tool — arguably even better than the original book for digital users.

– Each position is pre-set with FEN tags. No need to arrange pieces manually.