1. Nonogram study 1
7 steps in the included checked route. Try the board first, then compare the reasoning.
PRACTICE COLLECTION
Find the first certain squares
Work on uncluttered lines that separate exact fits from overlap. Compare a forced result with a similar line that still has choices, then explain why the difference matters.
Print these three studies with answers
Start with a decision
TRY IT 1 · nonograms-exact-fit-1
| C11 2 | C21 2 | C35 | C44 | C51 2 | |
|---|---|---|---|---|---|
| R12 | |||||
| R21 · 3 | |||||
| R33 | |||||
| R45 | |||||
| R51 · 3 |
What can you justify?
Use the exact fit technique. What does it prove about R2C1? Treat the displayed starting marks as established facts.
Written explanation
Row 2, clue 1, 3: 1 legal arrangement remains after respecting the current marks. Every arrangement agrees on R2C1 filled, R2C2 empty, R2C3 filled, R2C4 filled, R2C5 filled. Other undecided cells in this line are left open.
TRY IT 2 · nonograms-overlap-1
| C11 2 | C21 2 | C35 | C44 | C51 2 | |
|---|---|---|---|---|---|
| R12 | |||||
| R21 · 3 | |||||
| R33 | |||||
| R45 | |||||
| R51 · 3 |
What can you justify?
Use the overlap technique. What does it prove about R3C3? Treat the displayed starting marks as established facts.
Written explanation
Row 3, clue 3: 3 legal arrangements remain after respecting the current marks. Every arrangement agrees on R3C3 filled. Other undecided cells in this line are left open.
Apply the ideas to a complete board
These are fixed original studies, not new daily puzzles. The three study links below and this collection’s printable pack use identical starting positions. Their checked solution routes are included on each practice page. A collection’s technique drills may also appear in its lessons.
2. Nonogram study 2
10 steps in the included checked route. Try the board first, then compare the reasoning.
3. Nonogram study 3
11 steps in the included checked route. Try the board first, then compare the reasoning.