Bird Sudoku Level 154 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 154 Strategy
Hard Level 154 uses a 8x8 board with 27 perch cells, 7 blockers, and 6 habitats. Use the row and column counts first, then test each open diagonal flight line.
Bird Sudoku Level 154 Solution
Bird positions in the solution: R1C2, R1C8, R2C5, R3C2, R3C8, R4C6, R5C1, R7C8, R8C3, R8C8.