!queens: pretty printing

[numberten]

Pretty Printing Ideas:

• It would be cool if the !queens component had a pretty printer that displayed a grid of its solution.
• The bot should have error messages for the cases that don't have answers (n=2, n=3) as well as cases where answers are too computationally expensive (#19).

[keneanung]

Could make the chessboard look like this:

[7,4,8,6,2,5,3,1]
". . . . . . Q . "
". . . Q . . . . "
". . . . . . . Q "
". . . . . Q . . "
". Q . . . . . . "
". . . . Q . . . "
". . Q . . . . . "
"Q . . . . . . . "

That way we use only n+1 lines (could also leave the list out, which would make it n lines). Gotta play with flooding first though to define the upper bound.

Alternatively we could print the list only if the "board" would become too big.

[numberten]

I like the idea of printing the list only when the board becomes too big.

Also that visualization looks good, though your board doesn't seem to correspond with your numbers and your queens in rows 3 and 6 threaten each other. Assuming that was just a rough sketch to show what it would look, then it looks great.

[keneanung]

You're right. There's been a bug in my algoritm were I used the wrong variable for a recursive call. This should be the correct output

[4,2,7,3,6,8,5,1]
". . . Q . . . . "
". Q . . . . . . "
". . . . . . Q . "
". . Q . . . . . "
". . . . . Q . . "
". . . . . . . Q "
". . . . Q . . . "
"Q . . . . . . . "

I'm not sure where my numbers don't correspond to the board. Remember the list is index 1 based.

[numberten]

For some reason I was thinking numbers referred to rows, not columns. Looks good!