Bird Sudoku Level 133 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 133 Strategy
Hard Level 133 uses a 8x8 board with 27 perch cells, 6 blockers, and 7 habitats. Use the row and column counts first, then test each open diagonal flight line.
Bird Sudoku Level 133 Solution
Bird positions in the solution: R1C6, R1C7, R2C3, R3C6, R5C1, R5C7, R7C7, R8C2, R8C3, R8C5.