### ... by: Ygor, Netherands

Hi Andrew,

This is a great site! I am wondering what the score is of the most difficult sukoku that your solve can solve? And do you have this sudoku as an example?

Cheers,

Ygor

This is a great site! I am wondering what the score is of the most difficult sukoku that your solve can solve? And do you have this sudoku as an example?

Cheers,

Ygor

Andrew Stuart writes (1-Feb-2009):

The very high scores are above 2000. My sovler/grader plots puzzles in a bell curve but the right hand side exhibits what is known as a 'long tail' - that is some extreme puzzles will go off the scale usually because of a large number of Almost Locked Sets. While the solver includes Trial and Error strategies such as Nisho and Bowmans Bingo I don't like to include those in the grades. I filter these out as unacceptable for publishing but they would be candidates for very high scores. An example is

THIS ONE

which I score as 2528 but this won't show up on the web site grader as I exclude Nishio/Bowmans, but you are welcome to discover a better solve solution that doesn't involve them - I'd be very interested to see one.

THIS ONE

which I score as 2528 but this won't show up on the web site grader as I exclude Nishio/Bowmans, but you are welcome to discover a better solve solution that doesn't involve them - I'd be very interested to see one.