Bird Sudoku Level 161 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 161 Strategy
Hard Level 161 uses a 9x9 board with 29 perch cells, 10 blockers, and 8 habitats. Use the row and column counts first, then test each open diagonal flight line.
Bird Sudoku Level 161 Solution
Bird positions in the solution: R1C6, R2C2, R3C5, R4C7, R4C8, R5C1, R5C4, R6C4, R7C6, R8C9, R9C9.