FIXED PRACTICE BOARD
Nonogram study 1
Solve at your own pace. Ask what follows from the position before applying the suggested move.
| C13 1 | C20 | C32 1 | C40 | C51 1 | |
|---|---|---|---|---|---|
| R11 | |||||
| R21 · 1 · 1 | |||||
| R31 · 1 | |||||
| R40 | |||||
| R51 · 1 · 1 |
Loading interactive controls…
Work from the current board
Activate a square to cycle unknown → filled → empty.
Tab to any control and use Enter or Space.
Interactive help is separate from the written starting-board solution below.
What did this solve teach?
You met the complete win condition. Compare the written route below with your own moves. Identify one deduction you can explain without looking at the answer, and one place where a changed mark could invalidate the next conclusion.
Rules and proof limits
Fill squares to match the ordered runs beside each row and above each column. Separate consecutive runs by at least one empty square. A clue of 0 means the line is empty. These compact boards practise number constraints; their patterns are not promised to depict recognisable pictures.
A line deduction uses that line's clues and established marks. Unknown squares may be settled by crossing clues even when the line alone cannot decide them. No surviving patterns means the present constraints conflict; it does not automatically identify the first wrong move. A unique solution is not a promise that the four introductory techniques will finish every board.
Show the checked route from the starting position (7 steps)
This route starts from the original study position. It does not describe moves you made differently. Use “Explain a next step” for a deduction from your current marks.
- Row 2, clue 1, 1, 1: 1 legal arrangement remains after respecting the current marks. Every arrangement agrees on R2C1 filled, R2C2 empty, R2C3 filled, R2C4 empty, R2C5 filled. Other undecided cells in this line are left open.
- Row 4, clue 0: 1 legal arrangement remains after respecting the current marks. Every arrangement agrees on R4C1 empty, R4C2 empty, R4C3 empty, R4C4 empty, R4C5 empty. Other undecided cells in this line are left open.
- Row 5, clue 1, 1, 1: 1 legal arrangement remains after respecting the current marks. Every arrangement agrees on R5C1 filled, R5C2 empty, R5C3 filled, R5C4 empty, R5C5 filled. Other undecided cells in this line are left open.
- Column 1, clue 3, 1: 1 legal arrangement remains after respecting the current marks. Every arrangement agrees on R1C1 filled, R3C1 filled. Other undecided cells in this line are left open.
- Row 1, clue 1: 1 legal arrangement remains after respecting the current marks. Every arrangement agrees on R1C2 empty, R1C3 empty, R1C4 empty, R1C5 empty. Other undecided cells in this line are left open.
- Row 3, clue 1, 1: 3 legal arrangements remain after respecting the current marks. Every arrangement agrees on R3C2 empty. Other undecided cells in this line are left open.
- Column 3, clue 2, 1: 1 legal arrangement remains after respecting the current marks. Every arrangement agrees on R3C3 filled. Other undecided cells in this line are left open.
| C13 1 | C20 | C32 1 | C40 | C51 1 | |
|---|---|---|---|---|---|
| R11 | |||||
| R21 · 1 · 1 | |||||
| R31 · 1 | |||||
| R40 | |||||
| R51 · 1 · 1 |
Final check
Every completed row and column has exactly its ordered clue runs.