Bird Sudoku Level 89 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 89 Strategy
Medium Level 89 uses a 7x7 board with 16 perch cells, 7 blockers, and 7 habitats. Use the row and column counts first, then test each open diagonal flight line.
Bird Sudoku Level 89 Solution
Bird positions in the solution: R1C2, R2C6, R3C3, R3C4, R4C6, R6C2, R7C5.