Catdoku level 87 answer and walkthrough

The level 87 board

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

Level 87 answer

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

How to solve level 87, 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. Column 1 only has free squares inside the mint patch, so that patch's cat is spoken for and its squares outside the line can be crossed out. Cat 1 of 7: column 2 has exactly one square left, at row 7, so the cat goes there.
2. Cat 2 of 7: column 3 has exactly one square left, at row 2, so the cat goes there.
3. Cat 3 of 7: the rose patch is down to a single free square at row 3, column 5, so its cat settles there.
4. Cat 4 of 7: the yellow patch is down to a single free square at row 1, column 7, so its cat settles there.
5. Cat 5 of 7: the lilac patch is down to a single free square at row 5, column 6, so its cat settles there.
6. Cat 6 of 7: the mint patch is down to a single free square at row 4, column 1, so its cat settles there.
7. Cat 7 of 7: the peach patch is down to a single free square at row 6, column 4, so its cat settles there.