Don't be afraid to test your skills because true geniuses dare to step outside their comfort zones. Sudoku are number games. Unlike the crossword puzzles, these do not require prior knowledge. They also do not come with clues. You have to figure your way through each puzzle by understanding the numbers that are there and identifying the numbers that are not there. Good luck! Это и многое другое вы найдете в книге Think You're A Sudoku Genius? Let's Test You Out with Over 240+ Puzzles (Puzzle Therapist)