Bird Sudoku Level 115 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 115 Strategy
Hard Level 115 uses a 9x9 board with 29 perch cells, 10 blockers, and 9 habitats. Use the row and column counts first, then test each open diagonal flight line.
Bird Sudoku Level 115 Solution
Bird positions in the solution: R1C4, R1C5, R2C9, R3C9, R4C3, R7C7, R8C1, R8C2, R9C4, R9C6, R9C7.