1. Nonogram study 4
10 steps in the included checked route. Try the board first, then compare the reasoning.
PRACTICE COLLECTION
Use the marks you already know
Carry proven squares into crossing lines and close completed runs. The emphasis is on what changed since the previous position, including the information supplied by empty marks.
Print these three studies with answers
Start with a decision
TRY IT 1 · nonograms-completed-run-1
| C11 2 | C21 2 | C35 | C44 | C51 2 | |
|---|---|---|---|---|---|
| R12 | |||||
| R21 · 3 | |||||
| R33 | |||||
| R45 | |||||
| R51 · 3 |
What can you justify?
Use the completed runs technique. What does it prove about R1C1? Treat the displayed starting marks as established facts.
Written explanation
Column 1, clue 1, 2: 1 legal arrangement remains after respecting the current marks. Every arrangement agrees on R1C1 empty, R3C1 empty. Other undecided cells in this line are left open.
TRY IT 2 · nonograms-crossing-1
| C11 2 | C21 2 | C35 | C44 | C51 2 | |
|---|---|---|---|---|---|
| R12 | |||||
| R21 · 3 | |||||
| R33 | |||||
| R45 | |||||
| R51 · 3 |
What can you justify?
Use the crossing information technique. What does it prove about R1C1? Treat the displayed starting marks as established facts.
Written explanation
Column 1, clue 1, 2: 1 legal arrangement remains after respecting the current marks. Every arrangement agrees on R1C1 empty, R3C1 empty, R4C1 filled, R5C1 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 5
11 steps in the included checked route. Try the board first, then compare the reasoning.
3. Nonogram study 6
12 steps in the included checked route. Try the board first, then compare the reasoning.