Bird Sudoku Level 178 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 178 Strategy
Hard Level 178 uses a 9x9 board with 29 perch cells, 8 blockers, and 7 habitats. Use the row and column counts first, then test each open diagonal flight line.
Bird Sudoku Level 178 Solution
Bird positions in the solution: R1C5, R3C2, R3C8, R5C7, R6C2, R7C4, R8C7, R8C9, R9C1, R9C4, R9C7.