Bird Sudoku Level 101 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 101 Strategy
Hard Level 101 uses a 9x9 board with 29 perch cells, 9 blockers, and 6 habitats. Use the row and column counts first, then test each open diagonal flight line.
Bird Sudoku Level 101 Solution
Bird positions in the solution: R1C6, R1C7, R2C4, R3C7, R4C1, R4C5, R5C8, R6C4, R7C9, R8C6, R8C7.