A 10x10 board rated fiendish, level 293 of 300. Catdoku levels are identical for every player, so this solution always matches the board in your game.
The level 293 board
Place one cat in every row, every column and every colored patch. No two cats may touch, not even diagonally.
Level 293 answer
Row 1: column 1, in the yellow patch
Row 2: column 5, in the sky patch
Row 3: column 2, in the rose patch
Row 4: column 8, in the mint patch
Row 5: column 4, in the lilac patch
Row 6: column 9, in the peach patch
Row 7: column 7, in the aqua patch
Row 8: column 3, in the coral patch
Row 9: column 10, in the lime patch
Row 10: column 6, in the periwinkle patch
How to solve level 293, 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).
Every free square of the yellow patch sits in column 1, so the yellow cat must come from there and the rest of column 1 can be crossed out. A cat at row 1, column 2 would leave column 1 with no home for its cat, so cross that square out. A cat at row 2, column 2 would leave column 1 with no home for its cat, so cross that square out. A cat at row 2, column 3 would leave the rose patch with no home for its cat, so cross that square out. A cat at row 9, column 5 would leave the periwinkle patch with no home for its cat, so cross that square out. A cat at row 9, column 9 would leave the lime patch with no home for its cat, so cross that square out. The rose and coral patches all squeeze into columns 2 and 3, so those columns are reserved for them; every other square there can be crossed out. Every free square of the lilac patch sits in column 4, so the lilac cat must come from there and the rest of column 4 can be crossed out. Every free square of the periwinkle patch sits in row 10, so the periwinkle cat must come from there and the rest of row 10 can be crossed out. Cat 1 of 10: the lime patch is down to a single free square at row 9, column 10, so its cat settles there.
Cat 2 of 10: column 2 has exactly one square left, at row 3, so the cat goes there.
Cat 3 of 10: the yellow patch is down to a single free square at row 1, column 1, so its cat settles there.
Every free square of the sky patch sits in column 5, so the sky cat must come from there and the rest of column 5 can be crossed out. Cat 4 of 10: the periwinkle patch is down to a single free square at row 10, column 6, so its cat settles there.
Cat 5 of 10: the aqua patch is down to a single free square at row 7, column 7, so its cat settles there.
Cat 6 of 10: the peach patch is down to a single free square at row 6, column 9, so its cat settles there.
Cat 7 of 10: the lilac patch is down to a single free square at row 5, column 4, so its cat settles there.
Cat 8 of 10: the sky patch is down to a single free square at row 2, column 5, so its cat settles there.
Cat 9 of 10: the mint patch is down to a single free square at row 4, column 8, so its cat settles there.
Cat 10 of 10: the coral patch is down to a single free square at row 8, column 3, so its cat settles there.