Catdoku level 512 answer and walkthrough

The level 512 board

Place one cat in every row, every column and every colored patch. No two cats may touch, not even diagonally.

Level 512 answer

1. Row 1: column 3, in the yellow patch
2. Row 2: column 8, in the sky patch
3. Row 3: column 4, in the rose patch
4. Row 4: column 2, in the mint patch
5. Row 5: column 7, in the lilac patch
6. Row 6: column 5, in the peach patch
7. Row 7: column 1, in the aqua patch
8. Row 8: column 6, in the coral patch

How to solve level 512, step by step

After every placed cat, cross out the rest of its row, its column, its patch and the four corner squares around it. The steps below assume you do (the in-game auto-paws assist does it for you).

1. Cat 1 of 8: the coral patch is down to a single free square at row 8, column 6, so its cat settles there.
2. Cat 2 of 8: the aqua patch is down to a single free square at row 7, column 1, so its cat settles there.
3. Every free square of the peach patch sits in row 6, so the peach cat must come from there and the rest of row 6 can be crossed out. Cat 3 of 8: the lilac patch is down to a single free square at row 5, column 7, so its cat settles there.
4. Every free square of the mint patch sits in row 4, so the mint cat must come from there and the rest of row 4 can be crossed out. Column 8 only has free squares inside the sky patch, so that patch's cat is spoken for and its squares outside the line can be crossed out. A cat at row 1, column 4 would leave column 3 with no home for its cat, so cross that square out. A cat at row 1, column 5 would leave column 3 with no home for its cat, so cross that square out. Cat 4 of 8: column 5 has exactly one square left, at row 6, so the cat goes there.
5. A cat at row 2, column 2 would leave column 3 with no home for its cat, so cross that square out. A cat at row 2, column 3 would leave the yellow patch with no home for its cat, so cross that square out. A cat at row 2, column 4 would leave column 3 with no home for its cat, so cross that square out. Cat 5 of 8: the only free square left in row 2 is column 8, so the cat goes there.
6. Every free square of the rose patch sits in row 3, so the rose cat must come from there and the rest of row 3 can be crossed out. A cat at row 3, column 3 would leave row 4 with no home for its cat, so cross that square out. Cat 6 of 8: the rose patch is down to a single free square at row 3, column 4, so its cat settles there.
7. Cat 7 of 8: the mint patch is down to a single free square at row 4, column 2, so its cat settles there.
8. Cat 8 of 8: the yellow patch is down to a single free square at row 1, column 3, so its cat settles there.