May 12, 2015

Puzzle 083 - Tousa

Tousa was invented by Naoki Inaba.

Rules for Tousa
Write a number between 1 and 9 in exactly three cells of each row and column of the diagram. The numbers in a row or column must form an ascending arithmetic sequence from left to right resp. top to bottom (i.e. the difference between two consecutive numbers must be constant; e.g. 1-2-3 or 2-5-8 or 3-5-7).

May 2, 2015

Puzzle 082 - Wolves and Sheep Fences

Draw a single, non-intersecting loop that only consists of horizontal and vertical segments between the dots. 
Numbers inside a cell indicate how many of the edges of that cell are part of the loop.
All sheep must be inside the loop.
All wolves must be outside the loop.