A 1d row of cells also affects nearby cells above and below the line. Consider a row of three cells: https://parkscomputing.com/page/conways-game-of-life?board

A 1d row of cells also affects nearby cells above and below the line. Consider a row of three cells: https://parkscomputing.com/page/conways-game-of-life?boardSize=7&cellSize=20&speed=16.666666666666668&init=2,3;3,3;4,3 https://parkscomputing.com/page/conways-game-of-life?boardSi...; That produces a spinner, because the empty cells above and below the 1d row have three live cells nearby.