Sudoku – State se mistry – 800 lutnek a podrobn vklad, jak se zdokonalit Gordon Peter (2023)

This Czech-language book contains 800 sudoku puzzles, ranging from fairly easy to extremely challenging. Its introduction offers advice and techniques for solving puzzles and progressing to master level. Frank Longo, the author of more than 90 successful books, is a champion sudoku constructor. Alongside basic puzzles of the kind found in magazines and newspapers, he creates devilishly difficult challenges requiring advanced solving techniques, intended for anyone who truly wants to put their grey matter to the test.