Sunday 31 January 2016

Daily League #58: Odd's Neighbours Sum Sudoku

This is the last Sudoku in the Odd Sudoku series. This variant revisits last week's variant. This time the clues outside indicate the sum of the neighbours of the second odd digit. I thought that might make for an interesting variant.

This puzzle was harder to construct than last week's puzzle as you're giving less information about the neighbours. Finding a good opening wasn't all that easy, but this one works well. The whole design was a careful process. I ran in a few problems where there no longer was any valid solution left. The puzzle has a very narrow logical path, but I like how it all worked out. Don't expect this to be a fast solve, but it should still be fun. Enjoy.

Rules for Sudoku

In this Sudoku the numbers on the outside indicate the sum of the neighbouring digits of the second odd digit in that row or column, when looking from that side.

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