Bird Sudoku Level 175 Hint
Pick a row, column, or habitat with a low remaining count, then check which of its perch cells are blocked by open diagonal flight lines.
Bird Sudoku Level 175 Strategy
Hard Level 175 uses a 9x9 board with 29 perch cells, 11 blockers, and 8 habitats. Use the row and column counts first, then test each open diagonal flight line.
Bird Sudoku Level 175 Solution
Bird positions in the solution: R1C6, R1C8, R2C1, R2C2, R3C7, R3C9, R4C1, R6C7, R6C8, R6C9, R9C3.