Bird Sudoku Level 99 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 99 Strategy
Medium Level 99 uses a 8x8 board with 19 perch cells, 8 blockers, and 6 habitats. Use the row and column counts first, then test each open diagonal flight line.
Bird Sudoku Level 99 Solution
Bird positions in the solution: R1C7, R3C7, R4C1, R4C5, R4C7, R5C1, R7C7, R8C2.