Monday, September 4, 2023

Puzzle 190 ("USSQT Redux", Sudoku)

I constructed a Classic Sudoku for the 2023 US Sudoku Qualifying Test!  (Past me would be in shambles rn.)  Wei-Hwa essentially constructed an entire contest in three days; I decided to chip in a random Sudoku because I had no intentions of actually competing.  

The grid below is not the puzzle appearing on the actual test.  Instead, it was the "first draft" of that puzzle -- one I sent to Wei-Hwa first before finding the harder grid.  (At least, it's harder according to Andrew's Sudoku Solver; the USSQT puzzle has grade 82, while the below puzzle has grade 51.)

Online interface (puzz.link)

Online interface (Penpa) 

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