Bird Sudoku Level 40 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 40 Strategy
Medium Level 40 uses a 8x8 board with 21 perch cells, 7 blockers, and 9 habitats. Use the row and column counts first, then test each open diagonal flight line.
Bird Sudoku Level 40 Solution
Bird positions in the solution: R1C8, R2C6, R4C1, R5C1, R6C1, R6C4, R6C7, R7C7, R8C7.