A dependency-free, single-page walkthrough of a 10x10 cat-placement puzzle.
Place 10 cats so that:
- Every row contains exactly one cat.
- Every column contains exactly one cat.
- Every colored region contains exactly one cat.
- Cats do not touch horizontally, vertically, or diagonally.
The app starts from the blank colored grid and demonstrates an exact row-ordered forward-checking/backtracking proof. It independently enumerates the puzzle at runtime and verifies that the solution is unique.
R1C3, R2C10, R3C4, R4C8, R5C5, R6C7, R7C9, R8C1, R9C6, R10C2
Column sequence by row: 3, 10, 4, 8, 5, 7, 9, 1, 6, 2.
Open index.html directly in any modern browser. No server, build step, dependencies, or network access are required.