- Libro electrónico100 Difficult Chess Puzzles in One MoveCharles Morphy
- Libro electrónico160 Chess Puzzles in Two Moves, Part 1Charles Morphy
- Libro electrónico160 Chess Puzzles in Two Moves, Part 2Charles Morphy
- Libro electrónico180 Checkmates in Two Moves, Solutions in Diagrams Part 1Charles Morphy
- Libro electrónico500 Chess Puzzles in Two Moves, Part 1Charles Morphy
- Libro electrónico180 Checkmates in Two Moves, Solutions in Diagrams Part 2Charles Morphy
- Libro electrónico500 Chess Puzzles in Two Moves, Part 3Charles Morphy
- Libro electrónico160 Chess Puzzles in Two Moves, Part 3Charles Morphy
- Libro electrónico180 Checkmates in Two Moves, Solutions in Diagrams Part 3Charles Morphy
- Libro electrónico240 Checkmate Chess Puzzles in One MoveCharles Morphy
- Libro electrónico160 Chess Puzzles in Two Moves, Part 5Charles Morphy
- Libro electrónico500 Chess Puzzles in Two Moves, Part 2Charles Morphy
- Libro electrónico160 Chess Puzzles in Two Moves, Part 4Charles Morphy