Bird Sudoku Level 131 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 131 Strategy
Hard Level 131 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 131 Solution
Bird positions in the solution: R2C5, R3C7, R4C1, R5C6, R5C7, R5C8, R6C2, R7C6, R8C2, R8C9, R9C5.