Place the digits 1-9 in each row, column, and box.
Digits separated by an X must sum to 10. Digits separated by a V must sum to 5.
For every possible two-by-two region that does not contain a shaded cell, there may be a maximum of two even digits (2, 4, 6, 8), and a maximum of two prime digits (2, 3, 5, 7).
Solution code: Row 2
on 28. December 2024, 19:02 by Al Fresco
Great setting and a nice twist on 2x2 entropy :)
on 24. March 2023, 18:34 by Wolwo
That was a lot of fun. Great idea for a puzzle. Thanks!
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Thanks for the solve!
on 24. March 2023, 17:14 by Tilberg
Smooth opening, brutal midgame, nice endgame. Thanks!
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Thanks for the solve!
Difficulty: | ![]() |
Rating: | 95 % |
Solved: | 14 times |
Observed: | 9 times |
ID: | 000D0A |
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