Bird Sudoku Level 120 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 120 Strategy
Hard Level 120 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 120 Solution
Bird positions in the solution: R1C7, R1C8, R3C2, R4C6, R4C8, R5C1, R6C1, R9C3, R9C4, R9C7, R9C9.