mobiCatdoku Storm Drain walkthroughs
Levels 2001 to 2500: 500 boards from 9x9 and 10x10, on 3 lives. Every 10th level is a boss board. Every level below has its full answer grid and a step-by-step solution.
500
Levels
3
Lives
50
Boss boards
What Storm Drain asks of you
No warm-ups left: every board starts tough. Every tenth level is a boss board, the hardest board of its run of ten.
Treat the nine levels before a boss as practice for it. If a boss stalls, scan every pair of patches for the counting trick before you test single squares.
Techniques you will need
- Last free squareA row, column or patch is down to one square that can still hold a cat, so the cat goes there.Needed on 100% of Storm Drain boards, about 9.6 times per board.
- Patch in a lineEvery free square of a patch sits in one row or column, so that line belongs to the patch and the rest of it can be crossed out. It works the other way round too.Needed on 99% of Storm Drain boards, about 4 times per board.
- Dead-end squarePicture a cat on a square. If it would cross out every last spot in some row, column or patch, that square can never hold a cat.Needed on 100% of Storm Drain boards, about 19.2 times per board.
- Counting trickWhen two patches fit entirely inside the same two rows (or three inside three, and so on), those rows are theirs. Every other square in them can be crossed out.Needed on 100% of Storm Drain boards, about 2.7 times per board.
Hardest boards in Storm Drain
Level 2500, 10x10, boss board: the toughest solve in Storm Drain. See the walkthrough →Every Storm Drain level
Highlighted levels are boss boards.
Levels 2001 to 2100
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Levels 2101 to 2200
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Levels 2201 to 2300
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Levels 2301 to 2400
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Levels 2401 to 2500
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