Meowdoku Level 400 Answer Key, Walkthrough & Solution

Meowdoku Level 400 Step-by-Step Logic Walkthrough & Explained

Follow the replay below. Each board shows the result after applying that step.

Meowdoku Level 400 Step 1: Place cat at R10 C10: only legal cell

Place a cat here at . The light blue region has no other legal cell.

Meowdoku Level 400 Step 2: Place cat at R1 C9: only legal cell

Place a cat here at . The sky blue region has no other legal cell.

Meowdoku Level 400 Step 3: Mark X at R8 C1, R8 C4, and R8 C5 + 3 more: a region is locked to this row

The pink region must use row 8. No other region can use that row. Mark the highlighted cells with X.

Meowdoku Level 400 Step 4: Mark X at R9 C1, R9 C2, and R9 C5 + 3 more: a region is locked to this row

The orange region must use row 9. No other region can use that row. Mark the highlighted cells with X.

Meowdoku Level 400 Step 5: Mark X at R3 C7, R4 C6, and R4 C7 + 3 more: rows or columns are reserved

The blue and green regions must use columns 6 and 7. No other region can use those columns. Mark the highlighted cells with X.

Meowdoku Level 400 Step 6: Mark X at R6 C5: rows or columns are reserved

The orange, pink, teal, magenta, and yellow regions must use columns 1, 2, 3, 4, and 5. No other region can use those columns. Mark the highlighted cells with X.

Meowdoku Level 400 Step 7: Mark X at R8 C3: cats cannot touch

Every possible cat for the orange region conflicts with these cells. Cats cannot share a row, column, region, or diagonal touch. Mark the highlighted cells with X.

Meowdoku Level 400 Step 8: Place cat at R8 C2: only legal cell

Place a cat here at . The pink region has no other legal cell.

Meowdoku Level 400 Step 9: Place cat at R9 C4: only legal cell

Place a cat here at . The orange region has no other legal cell.

Meowdoku Level 400 Step 10: Mark X at R5 C8: cats cannot touch

Every possible cat for the blue region conflicts with these cells. Cats cannot share a row, column, region, or diagonal touch. Mark the highlighted cells with X.

Meowdoku Level 400 Step 11: Mark X at R4 C5 and R5 C3: cats cannot touch

Every possible cat for the magenta region conflicts with these cells. Cats cannot share a row, column, region, or diagonal touch. Mark the highlighted cells with X.

Meowdoku Level 400 Step 12: Mark X at R3 C1 and R3 C8: rows or columns are reserved

The yellow and green regions must use rows 2 and 3. No other region can use those rows. Mark the highlighted cells with X.

Meowdoku Level 400 Step 13: Mark X at R2 C5: cats cannot touch

Every possible cat for the green region conflicts with these cells. Cats cannot share a row, column, region, or diagonal touch. Mark the highlighted cells with X.

Meowdoku Level 400 Step 14: Mark X at R4 C8: assuming a cat there leaves a region empty

Suppose held a cat in the rose region. That assumption would leave the magenta region with no legal cell left. So cannot contain a cat. Mark it with X.

Test this possible cat

Try a temporary cat at , then follow what the puzzle rules force. If it leads to a contradiction, the must be X in the real puzzle.

Meowdoku Level 400 Step 15: Mark X at R6 C7: cats cannot touch

Every possible cat for the rose region conflicts with these cells. Cats cannot share a row, column, region, or diagonal touch. Mark the highlighted cells with X.

Meowdoku Level 400 Step 16: Mark X at R5 C1 and R5 C5: a region is locked to this row

The blue region must use row 5. No other region can use that row. Mark the highlighted cells with X.

Meowdoku Level 400 Step 17: Place cat at R4 C3: only legal cell

Place a cat here at . The magenta region has no other legal cell.

Meowdoku Level 400 Step 18: Mark X at R2 C6: cats cannot touch

Every possible cat for the yellow region conflicts with these cells. Cats cannot share a row, column, region, or diagonal touch. Mark the highlighted cells with X.

Meowdoku Level 400 Step 19: Mark X at R6 C8: assuming a cat there leaves a region empty

Suppose held a cat in the rose region. That assumption would leave Row 3 with no legal cell left. So cannot contain a cat. Mark it with X.

Test this possible cat

Try a temporary cat at , then follow what the puzzle rules force. If it leads to a contradiction, the must be X in the real puzzle.

Meowdoku Level 400 Step 20: Place cat at R7 C8: only legal cell

Place a cat here at . The rose region has no other legal cell.

Meowdoku Level 400 Step 21: Place cat at R6 C1: only legal cell

Place a cat here at . The teal region has no other legal cell.

Meowdoku Level 400 Step 22: Place cat at R3 C5: only legal cell

Place a cat here at . The yellow region has no other legal cell.

Meowdoku Level 400 Step 23: Place cat at R2 C7: only legal cell

Place a cat here at . The green region has no other legal cell.

Meowdoku Level 400 Step 24: Place cat at R5 C6: only legal cell

Place a cat here at . The blue region has no other legal cell.

Meowdoku Level 400 Result

All 10 cats are placed correctly:

R1 C9
R2 C7
R3 C5
R4 C3
R5 C6
R6 C1
R7 C8
R8 C2
R9 C4
R10 C10