Too Many Pigeons
(Published on 1. January 2026, 15:57 by MathGuy_12)
This was set for Scojo's Setting Saturday prompts. lmdemasi redeemed this prompt to create an approachable Doppelgänger puzzle.
Thanks to gdc for testing!
Rules:
- Doppelgänger:
- Fill each cell of the main grid such that every row, column and box contains a 0 and eight different digits from 1-9.
- No two rows, no two columns, and no two boxes may be missing the same digit.
- For each 0 in the grid, the digits missing in its row, column, and box must be three different digits.
- Fill each outer cell with the digit missing from the corresponding row, column, or box.
Solution code: The 9 digits from the column missing a 6 from top to bottom.
Comments
on 3. January 2026, 08:26 by Briks
Really nice, I liked it very much.
on 2. January 2026, 19:21 by dzamie
Huh, an otherwise vanilla doppelganger puzzle. Neat! Probably still a bit tough for an introduction, but once you know a couple of tricks (like how the extra row/column cells interact with the extra box cells), it's a pretty smooth solve.
I think doppelganger is my favorite variant.
on 2. January 2026, 13:28 by marcmees
Stretching the definition of approachable. :-)
Thanks
on 2. January 2026, 03:44 by Exigus
Doppelgänger adds a mind-bending level to the solve but it was very rewarding. Thanks!
