Bird Sudoku Level 177 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 177 Strategy
Hard Level 177 uses a 9x9 board with 29 perch cells, 10 blockers, and 7 habitats. Use the row and column counts first, then test each open diagonal flight line.
Bird Sudoku Level 177 Solution
Bird positions in the solution: R1C7, R2C3, R3C1, R4C1, R5C1, R5C8, R6C6, R6C8, R8C1, R9C1, R9C8.