Light Up (aka Akari) Puzzle

Place light bulbs in the grid to lit all squares while no two bulbs shine on each other.

  • The grid has light and dark colored cells. Dark colored cells represent a wall and light can not pass through this cell. Place bulbs in light colored cells to illuminate the board.
  • A bulb illuminates entire row and column for the respective cell until it either faces a wall or, is the last cell in that row/column.
  • Some wall cells display a number which denotes exact number of bulbs touching that cell. Non-numbered wall cells can have any number of bulbs adjacent to it.
  • A bulb can never shine on another bulb.