Catdoku level 1687 answer and walkthrough

The level 1687 board

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

Level 1687 answer

1. Row 1: column 9, in the yellow patch
2. Row 2: column 6, in the sky patch
3. Row 3: column 8, in the rose patch
4. Row 4: column 10, in the mint patch
5. Row 5: column 5, in the lilac patch
6. Row 6: column 3, in the peach patch
7. Row 7: column 1, in the aqua patch
8. Row 8: column 4, in the coral patch
9. Row 9: column 7, in the lime patch
10. Row 10: column 2, in the periwinkle patch

How to solve level 1687, 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 mint patch sits in column 10, so the mint cat must come from there and the rest of column 10 can be crossed out. 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. A cat at row 2, column 8 would leave the yellow patch with no home for its cat, so cross that square out. A cat at row 3, column 9 would leave the rose patch with no home for its cat, so cross that square out. A cat at row 4, column 7 would leave the rose patch with no home for its cat, so cross that square out. A cat at row 4, column 9 would leave column 10 with no home for its cat, so cross that square out. Every free square of the rose patch sits in column 8, so the rose cat must come from there and the rest of column 8 can be crossed out. A cat at row 3, column 7 would leave column 8 with no home for its cat, so cross that square out. A cat at row 5, column 9 would leave column 10 with no home for its cat, so cross that square out. A cat at row 6, column 2 would leave the aqua patch with no home for its cat, so cross that square out. A cat at row 7, column 4 would leave row 8 with no home for its cat, so cross that square out. A cat at row 7, column 5 would leave row 8 with no home for its cat, so cross that square out. A cat at row 9, column 2 would leave the periwinkle patch with no home for its cat, so cross that square 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 6, column 1 would leave row 7 with no home for its cat, so cross that square out. A cat at row 5, column 3 would leave row 6 with no home for its cat, so cross that square out. A cat at row 5, column 4 would leave row 6 with no home for its cat, so cross that square out. A cat at row 9, column 4 would leave row 8 with no home for its cat, so cross that square out. A cat at row 9, column 5 would leave row 8 with no home for its cat, so cross that square out. The lime and periwinkle patches all squeeze into rows 9 and 10, so those rows are reserved for them; every other square there can be crossed out. The aqua and periwinkle patches all squeeze into columns 1 and 2, so those columns are reserved for them; every other square there can be crossed out. Cat 1 of 10: the peach patch is down to a single free square at row 6, column 3, so its cat settles there.
2. Cat 2 of 10: the lilac patch is down to a single free square at row 5, column 5, so its cat settles there.
3. Cat 3 of 10: the mint patch is down to a single free square at row 4, column 10, so its cat settles there.
4. Cat 4 of 10: the rose patch is down to a single free square at row 3, column 8, so its cat settles there.
5. Cat 5 of 10: the aqua patch is down to a single free square at row 7, column 1, so its cat settles there.
6. Cat 6 of 10: the coral patch is down to a single free square at row 8, column 4, so its cat settles there.
7. Cat 7 of 10: the periwinkle patch is down to a single free square at row 10, column 2, so its cat settles there.
8. Cat 8 of 10: the only free square left in row 2 is column 6, so the cat goes there.
9. Cat 9 of 10: the yellow patch is down to a single free square at row 1, column 9, so its cat settles there.
10. Cat 10 of 10: the lime patch is down to a single free square at row 9, column 7, so its cat settles there.