Creating "optimal" puzzles

Everything about Sudoku that doesn't fit in one of the other sections

Creating "optimal" puzzles

Postby Guest » Wed May 18, 2005 2:00 pm

What is the lowest number of clues (given numbers) you can put on a sudoku board, and have a unique solution?

How many different such boards are there, not counting mirrored, shifted, and/or rotated versions?
Guest
 

Postby RFB » Wed May 18, 2005 7:07 pm

See the long running and lengthy thread
on Sudoku Maths http://forum.enjoysudoku.com/viewtopic.php?t=44

I haven't attempted to follow the arguments
RFB
 
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