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goodev / opensudoku-android

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Built in puzzle unsolvable #23

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
The 13th puzzle in the Easy group is unsolveable.

Opening the puzzle from fresh, the centre block is missing (3,5,7)
The 7 can only go in the centre position of this block.

Now there is no position in which 7 can go in the bottom-centre block.

Original issue reported on code.google.com by tom.sy...@gmail.com on 28 Aug 2009 at 2:05

GoogleCodeExporter commented 9 years ago 
--7-219--
5-2--9-78
--64-75--
---14--39
-319-845-
49--62---
--98-43--
17-2--8-5
--471-6--

I'm pretty sure this puzzle can be solved, have a look at Hodoku (sudoku
generator/solver/analyzer), it can help you with solving of this puzzle:
http://hodoku.sourceforge.net/en/index.php.

Original comment by romario...@gmail.com on 30 Aug 2009 at 1:18

GoogleCodeExporter commented 9 years ago 
I'm not certain that you've copied the puzzle exactly, I will check when at a 
computer.
However, if you recreate the steps I set out above on the original puzzle, they 
prove it is unsolveable.

Original comment by tom.sy...@gmail.com on 30 Aug 2009 at 2:00

GoogleCodeExporter commented 9 years ago

Original comment by romario...@gmail.com on 1 Oct 2009 at 9:07