Bird Sudoku Level 129 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 129 Strategy
Hard Level 129 uses a 9x9 board with 29 perch cells, 11 blockers, and 7 habitats. Use the row and column counts first, then test each open diagonal flight line.
Bird Sudoku Level 129 Solution
Bird positions in the solution: R1C4, R1C6, R3C9, R4C5, R4C6, R5C1, R5C3, R5C8, R6C3, R7C7, R8C3.