Four restrictions must hold at the same time
This reference covers Nebula Studio’s Zoodoku: Android package com.nebula.zoodoku and Apple app 6781525746. Both original store descriptions present the same animal-placement rules. A similarly named app or website may have different controls, level numbers or daily boards.
| Check | What a valid arrangement needs |
|---|---|
| Row | Exactly one animal in each row |
| Column | Exactly one animal in each column |
| Color | Exactly one animal in each colored region |
| Neighbors | No two animals in touching cells, including diagonal contact |
Example: what one confirmed animal rules out
Number rows from top to bottom and columns from left to right. Suppose an animal is confirmed at row 3, column 3. Every other square in row 3 and column 3 becomes unavailable. Every other square in its colored region is also unavailable.
The diagonal neighbors at row 2, column 2; row 2, column 4; row 4, column 2; and row 4, column 4 are excluded too. The orthogonal neighbors already share the occupied row or column. This is a consequence of the stated rules, not an answer to a published level.
An animal two or more cells away diagonally is not ruled out merely for lying on the same diagonal. It still has to pass the row, column, color and immediate-neighbor checks. Do not import the chess queen’s unlimited diagonal attack into this puzzle.
Use elimination before choosing another square
After applying those exclusions, inspect each unfinished row, column and colored region. If one has only a single legal square left, its animal must occupy that square. Apply all four checks again after placing it.
If a row, column or region has no legal square left, a current placement or exclusion needs rechecking. Several remaining candidates do not justify picking one at random. Keep a distinction between a proved animal and a square you are only considering.
These are logical deductions from the published restrictions. They do not require an assumed hint-button behavior, automatic X marking or a particular tap gesture. Use the controls shown by your installed version.
Daily and offline features are store descriptions
The original listings advertise Daily Puzzles, animal themes, many handcrafted levels and offline play. This check did not verify a daily reset time, cross-device progress or whether another Zoodoku product serves the same board.
Nisu does not host this app or its daily puzzle. No specific level answer, unlimited-hint promise or leaderboard claim is provided here.
What was checked
Nisu read both original store listings on October 30, 2026 and checked the deductions above against their rules. It did not install the app, solve an app level or test its interface. The credited cover is store icon artwork; the diagram explains rules rather than reproducing a game board.
Quick help
Can animals touch at a corner?
No. Both checked descriptions exclude immediate diagonal contact as well as sharing a row or column.
Does the no-touching rule forbid every square on a long diagonal?
No. It concerns neighboring cells. A more distant diagonal square must still satisfy the other restrictions.
Does Nisu provide today’s Zoodoku answer?
No. This is a rules and deduction reference for Nebula Studio’s identified app, not a hosted daily board or a tested level walkthrough.
Source and scope
Checked October 30, 2026 against the identified Google Play and App Store listings. The coordinate example is Nisu’s deduction from the published rules; no app level was tested.