| Here are the boards | |
| A1 | Easy-NYTimes |
| A2 | Medium-NYTimes |
| A3 | Hard-NYTimes |
| A4 | WebSudoku-Hard |
| A5 | WebSudoku-Evil |
| A6 | https://www.telegraph.co.uk/news/science/science-news/9359579/Worlds-hardest-sudoku-can-you-crack-it.html |
| A7 | sudokugarden.de/files/100sudoku2-en.pdf-Nr-100 |
| A8 | sudokugarden.de/files/100sudoku2-en.pdf-Nr-50 |
| Here are people's results: |
| Mr. Brooks Daniel Gelfand Qian Zhou Alexander Radu Anton Danylenko Hanna Yang Raunak Chowdhury Jason Lin Bill Ni Jonathan Singer |