Bird Sudoku Level 111 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 111 Strategy
Hard Level 111 uses a 9x9 board with 29 perch cells, 10 blockers, and 8 habitats. Use the row and column counts first, then test each open diagonal flight line.
Bird Sudoku Level 111 Solution
Bird positions in the solution: R1C5, R2C1, R2C3, R3C1, R4C7, R4C9, R5C5, R5C7, R8C7, R9C5, R9C7.