Zoodoku level guide
Zoodoku Level 21 Walkthrough
Zoodoku Level 21 is a 9x9 cat board with no seeded animal. Start at r6c8, take the narrow r5c5 cell, then work through r1c7, r2c2, and the lower pockets before finishing at r3c9.
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How to Solve Zoodoku Level 21 — Full Solution
- Place the first cat at r6c8 in the middle-right slate-blue region. This is the safe alternative to the source's failed r7c8 probe and establishes the first row, column, and diagonal exclusions.
- Place the next cat at the single lime cell r5c5, using the reduced middle candidates instead of reopening the occupied r6c8 neighborhood.
- Put a cat at r1c7 in the upper brown strip; its top-row position avoids the cats already placed in column 8 and the central lime cell.
- Fill the yellow band at r2c2. Leave r3c4 out of the route because the source marks that tempting yellow square red.
- Place the orange-region cat at r7c4 after the upper yellow choice has removed its row and diagonal alternatives.
- Place the lower green-region cat at r9c3, preserving the open pink cells on row 8 and the far-left plum route.
- Place the pink-region cat at r8c6; the surrounding white Xs leave this lower-middle square as the legal pink landing.
- Place the left-side plum-region cat at r4c1. The upper-left plum cells are crossed out by the solved rows and diagonals, making this the remaining left-edge choice.
- Finish at r3c9 in the far-right slate-blue area. This ninth cat completes the board and triggers the source's Perfect state.
Colors in this level:
Plum, Slate-blue, Brown, Yellow, Lime, Orange, Green, Pink
Common Mistakes to Avoid
- Repeating the source's second bad probe at r3c4 in the yellow band creates another red X and consumes the last remaining heart after the r7c8 error.
- Stopping after r4c1 leaves the far-right slate-blue territory unfinished; keep r3c9 for the final placement and wait for Perfect.
Quick Tips for Zoodoku Level 21 (quick clues)
- The first safe landing is r6c8, not the tempting r7c8 below it. After r6c8, keep r5c5 open as the next narrow target.
- When the lower pockets open, preserve r8c6 for the pink region and leave r3c9 until the final pass.
Board notes 5 details
- Layout
- The opening is a clear 9x9 grid: a large plum region fills the left side, a yellow band occupies r2c2-r2c4 and r3c4, brown cells sit at r1c7-r1c8 and r2c8, lime/green pockets sit around r5c5-r6c5 and r8c3-r9c5, an orange strip spans r7c4-r7c6, pink cells occupy r8c5-r9c8, and slate-blue lanes fill the remaining center/right cells. No animal or X is seeded in the first frame.
- Goal
- The key bottleneck is the single lime cell at r5c5 together with the separated lower green and pink pockets. Secure r6c8 first so its row, column, and diagonal exclusions expose those small regions without closing the left-side route.
- Opening
- There is no opening animal. The source first mis-taps r7c8, which becomes a red error X, then correctly places cats in r6c8, r5c5, and r1c7. It later mis-taps r3c4 before correctly taking r2c2; the white Xs around these placements are propagated logical exclusions.
- Danger Zone
- Do not copy the source's first probe at r7c8: it is the blue cell immediately below r6c8, becomes a red X, and costs a heart. The correct first landing is r6c8.
- Mechanics
- This 9x9 board uses cat artwork, a large no-anchor opening, a one-cell r5c5 region, and visible white-X propagation. Two red error Xs reduce the heart strip from three hearts to one, but the nine-cat route still ends in the source's Perfect state; animal species are decorative.
Frequently Asked Questions
Are any animals already placed when Zoodoku Level 21 opens?
No. The first frame is a completely clear 9x9 board; r6c8 is the first successful cat placement.
Why is r5c5 important in the middle of Level 21?
It is the narrow single lime cell. Taking r5c5 immediately after r6c8 prevents the wider slate-blue lanes from obscuring that forced region.
What is the last square in Zoodoku Level 21?
After r4c1, place the final cat at r3c9. The progress strip then fills and the source shows Perfect.