Bird Sudoku Level 168 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 168 Strategy
Hard Level 168 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 168 Solution
Bird positions in the solution: R1C6, R2C6, R4C9, R5C5, R5C6, R5C7, R6C2, R6C3, R9C3, R9C4, R9C7.