What if one puzzle a day could sharpen your mind, boost your focus, and train you to think like a genius?
Sudoku simplified is your complete guide to becoming a confident and skilled solver ー no gu……続きを見る
This book is your complete guide to mastering the Rubik's Cubeーfrom understanding its structure and basic movements to advanced solving techniques and mental strategies. Whether you're a curious be……続きを見る
"The art of the checkmate has at last been provided with a scientific foundation." ー Chicago Sunday TribuneOne of the most difficult situations in chess is seeing potential mates in the near future……続きを見る
