Candles

Rules

Place some lighted candles into the grid. The candles have different heights which are determined by the location of other candles nearby. A candle with no other candles in horizontally or vertically adjacent cells has height 4. For each horizontally or vertically adjacent candle, its height is reduced by 1 (the heat of nearby candles melts wax); diagonally touching candles don’t affect each other. A candle of height 0 is not allowed. Candles cannot be placed in cells with numbers. The numbers indicate the total height of all candles in horizontally, vertically and diagonally neighbouring cells.

(Rules and example from WPC 2019 IB)

History of the puzzle

Invented by Ute Weiß (Germany) in 2015. First appeared on LMD portal.

Appearances in the past WPCs

• WPC 2019/Round 5 by Sebastian Matschke