Bird Sudoku Level 84 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 84 Strategy
Medium Level 84 uses a 7x7 board with 19 perch cells, 4 blockers, and 7 habitats. Use the row and column counts first, then test each open diagonal flight line.
Bird Sudoku Level 84 Solution
Bird positions in the solution: R1C1, R1C2, R1C3, R2C5, R5C1, R5C3, R6C5, R7C2.