Solve constrained regions first
Small color regions and edge regions often reveal forced cats before the center does.
These strategies apply across the current walkthrough set and help keep your solves logical instead of heart-draining.
Small color regions and edge regions often reveal forced cats before the center does.
Once a row has a cat, every other candidate in that row can be removed from consideration.
Two cells can look legal by region and row rules while still failing because they touch at a corner.
Large regions should usually wait until surrounding cats reduce their candidate list.
Before spending a heart, check region count, row conflict, column conflict, and diagonal contact.