Thursday, April 6, 2017

Puzzle 315: Masyu/AntiMasyu-AntiSurround/Surround

This is a very interesting new type of loop puzzle.

Rules:
Draw a closed loop connecting the centres of some cells horizontally or vertically. All circles must be visited. The loop may not intersect itself. The loop has to go straight through every white circle, and make a 90 degrees turn in at least one adjacent cell, while it has to make a turn in every black circle and go straight through both cells adjacent to the circle. Some circles are not Masyu, meaning the loop does not obey either of the Masyu rules when passing through those circles. Around any Masyu circle, not all cells can be visited. Around rest of the circles, all cells must be used by the loop.


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