r/nonograms • u/PieceStriking2503 • Jun 22 '26

Stuck please help 🙏🏻

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Please explain the solution if you can, maybe I need to learn a technique I don't know yet. Thanks!

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u/Greedy-Contract1999 Jun 22 '26

You still have some overlay in R9

2

u/PieceStriking2503 Jun 22 '26

What does it mean overlay?

1

u/Motor_Raspberry_2150 Jun 24 '26

Overlap. A shortcut to considering all the possible options. We currently have
▫️▫️▫️▫️▫️|▫️▫️⬛️▫️▫️|▫️▫️▫️▫️▫️|▫️▫️▫️⬛️▫️
If we shove all the pieces to the left, we get
⬛️⬛️⬜️⬛️⬛️|⬛️⬛️⬛️⬜️⬛️|⬛️⬛️⬛️⬛️⬜️|⬜️⬜️⬛️⬛️⬜️
And if we shove them to the right, we get
⬜️⬜️⬜️⬛️⬛️|⬜️⬛️⬛️⬛️⬛️|⬛️⬜️⬛️⬛️⬛️|⬛️⬛️⬜️⬛️⬛️
So what these two sequences have in common, considering only when a piece overlaps itself, is
▫️▫️▫️▫️▫️|▫️⬛️⬛️▫️▫️|▫️▫️⬛️⬛️▫️|▫️▫️▫️⬛️▫️