Start with small regions
Compare how much space each colored region has. A region with only a few candidate squares is easier to inspect than a large open area. If a region has just one legal candidate, the region rule forces the cat into it.
Look for forced placements
Read the board in three directions: across rows, down columns, and through each colored region. A constraint that is hard to spot from one direction may be clear from another. Check whether any row, column, or region has exactly one remaining legal square.
Watch the diagonal neighbors
A row-and-column check is not enough. The no-touch rule also excludes the diagonally neighboring squares. Recheck those corners after every placement, especially when two regions meet in a tight space.
Keep deductions separate from guesses
Before committing, explain why a square must contain a cat or cannot contain one. If you cannot justify the move, revisit the constraints rather than treating the first possibility as a certainty. Our demo records your marks but does not confirm deductions for you.
Rule and app details checked November 4, 2026: Google Play developer description and Apple App Store. Tips are deductions from those placement constraints.