Catdoku level 931 answer and walkthrough

The level 931 board

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

Level 931 answer

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

How to solve level 931, 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. Every free square of the coral patch sits in row 8, so the coral cat must come from there and the rest of row 8 can be crossed out. Every free square of the aqua patch sits in row 7, so the aqua cat must come from there and the rest of row 7 can be crossed out. 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 6, column 7 would leave row 7 with no home for its cat, so cross that square out. A cat at row 6, column 8 would leave row 7 with no home for its cat, so cross that square out. A cat at row 7, column 7 would leave row 8 with no home for its cat, so cross that square out. Cat 1 of 8: the aqua patch is down to a single free square at row 7, column 8, so its cat settles there.
2. Cat 2 of 8: the coral patch is down to a single free square at row 8, column 6, so its cat settles there.
3. A cat at row 4, column 4 would leave the rose patch with no home for its cat, so cross that square out. A cat at row 5, column 4 would leave the peach patch with no home for its cat, so cross that square out. A cat at row 5, column 5 would leave the peach patch with no home for its cat, so cross that square out. The sky and peach patches all squeeze into columns 5 and 7, so those columns are reserved for them; every other square there can be crossed out. 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 2, column 3 would leave row 3 with no home for its cat, so cross that square out. A cat at row 1, column 5 would leave the yellow patch with no home for its cat, so cross that square out. Cat 3 of 8: column 5 has exactly one square left, at row 6, so the cat goes there.
4. A cat at row 2, column 4 would leave row 3 with no home for its cat, so cross that square out. Every free square of the yellow patch sits in row 1, so the yellow cat must come from there and the rest of row 1 can be crossed out. A cat at row 3, column 3 would leave the lilac patch with no home for its cat, so cross that square out. Cat 4 of 8: the rose patch is down to a single free square at row 3, column 4, so its cat settles there.
5. A cat at row 4, column 2 would leave row 5 with no home for its cat, so cross that square out. Cat 5 of 8: the lilac patch is down to a single free square at row 5, column 3, so its cat settles there.
6. Cat 6 of 8: column 2 has exactly one square left, at row 1, so the cat goes there.
7. Cat 7 of 8: the mint patch is down to a single free square at row 4, column 1, so its cat settles there.
8. Cat 8 of 8: the sky patch is down to a single free square at row 2, column 7, so its cat settles there.