Cat Sudoku Level 237 Hint
Look for a region whose legal cells are squeezed by two or more neighboring rows. High-level puzzles often move through exclusion, not obvious singles.
Cat Sudoku Level 237 Strategy
Master Level 237 uses a 10x10 board with 10 colored regions. It starts with 1 fixed cats to anchor the solve. Work from the tightest rows and regions before placing a cat.
Cat Sudoku Level 237 Solution
Solution cells: R1C10, R2C2, R3C7, R4C4, R5C6, R6C1, R7C3, R8C9, R9C5, R10C8.