Numbered Rooms

Rules

Place a number from 1 to X (integers only) into each cell so that each number appears exactly once in each row and column. (X is the number of cells in each row.) Digits outside the grid show content of the room numbered by digit in the first square in the corresponding direction. (i.e. 2 clue in the first row and 6 in R1C1 implies there is a 2 in R1C6)

(Example from WPC 2015 IB)

History of the puzzle

Possibly invented by Olga Leontieva (Russia).

Appearances in the past WPCs

• WPC 2015/Round 10 by Olga Leontieva