UKPA Open 2016: Individual Round

The UKPA Open 2016 was held in Croydon on February 27th-28th. Tom Collyer was the winner of the Sudoku competition, with Mark Goodliffe finishing in second and Heather Golding in third. Neil Zussman won the Puzzle competition, with Tom Collyer finishing in second and Steve Barge in third.

I contributed an individual round for the puzzle event and a team round. This post will contain all puzzles from the individual round. The team round will be posted in a separate post.

Puzzles can be found below.

Puzzle #173: Norinori

This is the first practise puzzle for this year's UKPA Open.

This is the first Norinori puzzle I have ever written. I wanted to avoid using a domino region as an opening. This is one of the two I found. It is also the harder of the two. This puzzle is pretty hard as there are some key deductions to be made in the middle. It wasn't something I had used myself in a Norinori puzzle before.

Rules:

Colour two cells in each black-bordered region, so that each black cell shares an edge with exactly one other black cell. Black cells may touch within a region, but don't have to.

Example

Puzzle