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Extreme difficulty puzzle
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nih_che

Joined: 19 Feb 2007
Posts: 1
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PostPosted: Mon Feb 19, 2007 11:33 pm    Post subject: Reply with quote

dukuso wrote:
Sambor wrote:
tilps wrote:
Since we're here
1.6.3 - current hardest

Code:
..3|.5.|4..
7..|.6.|...
.5.|8..|.6.
-----------
5..|..3|..4
.1.|.7.|.8.
2..|4..|..7
-----------
.4.|..8|.5.
...|.4.|..9
..6|.1.|2..


Hmm, I have tried this but didn't get far. So I tried to check it with various solvers, and they all claim that there is no solution. So is it correct? Is your solver doing something no one else do? Just wondering...


exactly one solution. You tried the wrong solvers


Yes, there is only one solution. My solver can do it in the fastest time it can solve any sudoku (16 ms) so I would not consider it as very hard / tricky!
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