To do:
Add pics to illustrate each grid puzzle type

Shade grid puzzles are named as such due to in order to solve the puzzle shading the grids is a must. Below are types of shading puzzles



  • Certain cells are shaded so that each number indicates total number of cells that are "visible"/ unshaded cells in the same row and column, including cells itself
  • No cells with number can be shaded
  • Shaded cells cannot touch except diagonally
  • All unshaded cells must form a single continuous area, you can travel horizontal and vertically from cells to cells



  • Shade rectangular group of cells so that each group is at least 2 cells wide and at least 2 cells tall ( > 2X2)
  • Each shaded rectangular cannot touch at all even diagonally
  • The number given is the number of shaded cells in each rows and columns

Light UpEdit


  • Place light bulbs in some empty cells so that each empty cells is illuminated
  • Light bulbs illuminate every cell in their row and column until being blocked by black cell
  • No light bulb can be illuminated by other light bulb
  • Some black cells have number, corresponding to the number of touching, non diagonally cells



  • Shade some grid cells, which may include the numbers printed on them
  • A number in cell reveal the number of shaded touching cells, including touching diagonally and the cell itself
  • The finished puzzle will reveal a simple picture




  • Shade some grid cells, so that no 2 shaded cells are adjacent (except diagonally) and unshaded cells forming single continuous area
  • Any single horizontal or vertical group of unshaded cells cannot cross more than one bold line region
  • Number cells may or may not be shaded but it always gives the precise amount of shaded cells inside the bold line region



  • Shade some cells to form contiguous shaded region
  • Numbers in a cell reveal length of each group of touching shaded cells (Including diagonally touching cells)
  • If there are more than one number in a cell, meaning there must be at least one unshaded cell
  • Shaded cell cannot form 2X2 square or larger



  • Place mines into empty cells in the grid
  • Number in the cells meant that humber of mines touching the cells itself (including diagonally)
  • Only one mine may be placed per cell



  • Shade some cells to form a single snake that starts and ends at the given cells
  • The "snake does not cross over itself
  • The snake does not touch itself (even diagonally, except when turning cornet)
  • Number outside the grid specify number of cells in row/column contain part of the snakes



  • Shade some cells so that no numbers repeat in any row of column
  • Shaded cells cannot touch except diagonally
  • All shaded cells must form a single unconnected region



  • Shade some cells so that every numbers in the puzzle remain as part of continuous unshaded rectangle of precisely the given cells
  • Shaded cells cannot form areas larger than 2X2
  • Not all unshaded rectangles are necessarily marked with numbers
  • In this puzzle, rectangle can meant square too.

Star BattleEdit


  • Place stars in some cells so that each row , column and outlined region contains exactly two stars
  • Stars cannot touch each other, not even diagonally