This puzzle from dailykillersudoku.com is over 10 years old but has an average solve time of well over an hour - despite being rated only 4/10. This grading is horribly misleading, this is a brute. Give it a try and then take a look at one way of making logical progress.
Негізгі бет Another Quick Tip To Improve Your Killer Sudoku
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Пікірлер: 10