Bird Sudoku Level 20 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 20 Strategy
Easy Level 20 uses a 6x6 board with 11 perch cells, 2 blockers, and 5 habitats. Use the row and column counts first, then test each open diagonal flight line.
Bird Sudoku Level 20 Solution
Bird positions in the solution: R2C2, R4C6, R5C2, R5C4, R6C2.