Mirror Labyrinth

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Rules[edit]

Mirror Labyrinth Example.png Mirror Labyrinth Example Solution.png

Place numbers from 1-N and two mirrors of different orientations in the grid so that each symbol appears exactly once in each row and each column. The hints around the grid indicate how the light travels through the mirror labyrinth. The same letters indicate the entrance and exit of the beam. The number is equal to the sum of numbers encountered on the way through the labyrinth. If the beam passes twice through the same number, this number is calculated twice.

(Rules and example (N=3) from WPC 2018 IB)

History of the puzzle[edit]

Appeared on WPC 2018/Round 12, an "innovatives" round. The puzzle was written by Jiří Hrdina (Czech Rep.).

Appearances in the past WPCs[edit]