Rules
Standard Sudoku rules apply.
Renban: Pink lines contain a non-repeating set of consecutive digits in any order.
Pentomic Renban: The grid is populated with a number of "Exploding Pentominoes." These each represent a non-repeating set of five consecutive digits in any order, one per box in the cells corresponding to the shape and orientation of the pentomino, and its position within a cell, without any rotation or reflection.
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This puzzle employs dynamic fog. Entering a correct digit will clear at least the cell it occupies, and sometimes other cells as well.
Illustration of Exploding Pentominoes
The five cells of the Pentomic Renban Set defined by each Exploding Pentomino occupy the same position in each 3x3 box.
Puzzle Series
Solution code: column 3, row 9
on 12. February 2026, 19:24 by Crusader175
I understand the rules now and can confirm that the new version is unique. You might want to clarify the rules to show that every pentomino can't be shifted, but I'm not sure what the best way to write it. Maybe you can give the illustration to show valid pentomino and not valid pentomino.
on 12. February 2026, 08:17 by psams
Updated puzzle to resolve logical ambiguity of partially revealed renban lines. Thanks to Crusader175 for bringing this to my attention.
on 11. February 2026, 18:41 by RobJH
Really enjoyed this, playing hunt the renban in the fog and the deductions it forced was a fun challenge!
on 11. February 2026, 16:44 by sparkymanu
Well, I'm impressed. At first I had no idea where you wanted us to look for, but I'm glad I insisted, it was a very unique puzzle (for what I experienced at least) so thank you so much for submitting this!
Well done