Bird Sudoku Level 66 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 66 Strategy
Medium Level 66 uses a 7x7 board with 19 perch cells, 4 blockers, and 7 habitats. Use the row and column counts first, then test each open diagonal flight line.
Bird Sudoku Level 66 Solution
Bird positions in the solution: R1C6, R2C1, R3C1, R3C6, R5C6, R6C6, R7C2, R7C3.