This is the third of three 'simpler'
Still Life
puzzles that do not feature other rules or variants, and were inspired by
Metroid.
If you haven't yet, consider solving the first puzzle
Protium
and the second puzzle
Deuterium!
More puzzles using this ruleset were popularized by
Kafkapharnaum
and
Sktx.
Check out the
complete list of all the Still Life puzzles!
Rules:
Normal sudoku rules apply
Place the digits 1 to 9 in each row, column, and 3x3 box.
Still Life
Shade some cells green ("live cells") such that the – up to – eight cells neighboring each green cell contain exactly 2 or 3 other green cells and the neighbors of each 'unshaded' – or grey – cell ("dead cells") do not contain exactly 3 green cells
– A CIRCLED cell's digit indicates the number of cells that are in the SAME state as its own in its neighborhood, INCLUDING its own cell
– A SQUARED cell's digit indicates the number of cells that are in a DIFFERENT state from its own in its neighborhood (therefore not including its own cell)
Not all circled and squared cells are necessarily given.
Play the puzzle on Sudokupad