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copied that Queens N=0 incorrectly...
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Darrel Hoffman
Darrel Hoffman
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- Queens Credit: Wikpedia: Eight Queens Puzzle
The rest I came up with myself. 

 32 . . . . . . . .  14 . B B B B B B .  32 N . N . N . N .
    P P P P P P P P     . . . . . . . .     . N . N . N . N
    . . . . . . . .     . . . . . . . .     N . N . N . N .
    P P P P P P P P     . . . . . . . .     . N . N . N . N
    . . . . . . . .     . . . . . . . .     N . N . N . N .
    P P P P P P P P     . . . . . . . .     . N . N . N . N
    . . . . . . . .     . . . . . . . .     N . N . N . N .
    P P P P P P P P     B B B B B B B B     . N . N . N . N

  8 R . . . . . . .   8 . . . Q . Q . . .  16 . . . . . . . .
    . R . . . . . .     . . .Q . . Q. . .     K . K . K . K .
    . . R . . . . .     Q . . . . . . .     . . . . . . . .
    . . . R . . . .     . . . . . . Q .     K . K . K . K .
    . . . . R . . .     . Q . . . . . .     . . . . . . . .
    . . . . . R . .     . . . . . . . Q     K . K . K . K .
    . . . . . . R .     . . Q . . . Q . .     . . . . . . . .
    . . . . . . . R     . . . . Q . . . .     K . K . K . K .

- Queens Credit: Wikpedia: Eight Queens Puzzle
The rest I came up with myself. 

 32 . . . . . . . .  14 . B B B B B B .  32 N . N . N . N .
    P P P P P P P P     . . . . . . . .     . N . N . N . N
    . . . . . . . .     . . . . . . . .     N . N . N . N .
    P P P P P P P P     . . . . . . . .     . N . N . N . N
    . . . . . . . .     . . . . . . . .     N . N . N . N .
    P P P P P P P P     . . . . . . . .     . N . N . N . N
    . . . . . . . .     . . . . . . . .     N . N . N . N .
    P P P P P P P P     B B B B B B B B     . N . N . N . N

  8 R . . . . . . .   8 . . . Q . . . .  16 . . . . . . . .
    . R . . . . . .     . . . . . Q . .     K . K . K . K .
    . . R . . . . .     Q . . . . . . .     . . . . . . . .
    . . . R . . . .     . . . . . . Q .     K . K . K . K .
    . . . . R . . .     . Q . . . . . .     . . . . . . . .
    . . . . . R . .     . . . . . . . Q     K . K . K . K .
    . . . . . . R .     . . Q . . . . .     . . . . . . . .
    . . . . . . . R     . . . . Q . . .     K . K . K . K .

- Queens Credit: Wikpedia: Eight Queens Puzzle
The rest I came up with myself. 

 32 . . . . . . . .  14 . B B B B B B .  32 N . N . N . N .
    P P P P P P P P     . . . . . . . .     . N . N . N . N
    . . . . . . . .     . . . . . . . .     N . N . N . N .
    P P P P P P P P     . . . . . . . .     . N . N . N . N
    . . . . . . . .     . . . . . . . .     N . N . N . N .
    P P P P P P P P     . . . . . . . .     . N . N . N . N
    . . . . . . . .     . . . . . . . .     N . N . N . N .
    P P P P P P P P     B B B B B B B B     . N . N . N . N

  8 R . . . . . . .   8 . . . . Q . . .  16 . . . . . . . .
    . R . . . . . .     . . Q . . . . .     K . K . K . K .
    . . R . . . . .     Q . . . . . . .     . . . . . . . .
    . . . R . . . .     . . . . . . Q .     K . K . K . K .
    . . . . R . . .     . Q . . . . . .     . . . . . . . .
    . . . . . R . .     . . . . . . . Q     K . K . K . K .
    . . . . . . R .     . . . . . Q . .     . . . . . . . .
    . . . . . . . R     . . . Q . . . .     K . K . K . K .

Fix mis-attribution
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Darrel Hoffman
Darrel Hoffman
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- Knights Credit: Daniel Mathias and Jaap ScherphuisRob Pratt on this question.

 32 . . N N N N . .  16 Q Q Q Q Q Q Q Q  36 K K . K K . K K
    . N . N N . N .     Q . . . . . . .     K K . K K . K K
    . N N N N N N .     Q . . . . . . .     . . . . . . . .
    N . . . . . . N     Q . . . . . . .     K K . K K . K K
    N . . . . . . N     Q . . . . . . .     K K . K K . K K
    . N N N N N N .     Q . . . . . . .     . . . . . . . .
    . N . N N . N .     Q . . . . . . .     K K . K K . K K
    . . N N N N . .     Q . . . . . . Q     K K . K K . K K

- Knights Credit: Daniel Mathias and Jaap Scherphuis on this question.

 32 . . N N N N . .  16 Q Q Q Q Q Q Q Q  36 K K . K K . K K
    . N . N N . N .     Q . . . . . . .     K K . K K . K K
    . N N N N N N .     Q . . . . . . .     . . . . . . . .
    N . . . . . . N     Q . . . . . . .     K K . K K . K K
    N . . . . . . N     Q . . . . . . .     K K . K K . K K
    . N N N N N N .     Q . . . . . . .     . . . . . . . .
    . N . N N . N .     Q . . . . . . .     K K . K K . K K
    . . N N N N . .     Q . . . . . . Q     K K . K K . K K

- Knights Credit: Daniel Mathias and Rob Pratt on this question.

 32 . . N N N N . .  16 Q Q Q Q Q Q Q Q  36 K K . K K . K K
    . N . N N . N .     Q . . . . . . .     K K . K K . K K
    . N N N N N N .     Q . . . . . . .     . . . . . . . .
    N . . . . . . N     Q . . . . . . .     K K . K K . K K
    N . . . . . . N     Q . . . . . . .     K K . K K . K K
    . N N N N N N .     Q . . . . . . .     . . . . . . . .
    . N . N N . N .     Q . . . . . . .     K K . K K . K K
    . . N N N N . .     Q . . . . . . Q     K K . K K . K K

Some improvements to one color from comments, add Queens, N=4
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Darrel Hoffman
Darrel Hoffman
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Queens > 3 may be impossible?Queens, N = 4

14 of each can fit.
- Credit: daw on "Queens attacking exactly four queens"

 . B . W B . W .
 W . . . . . . B
 . . . W B . . .
 B . B W B W . W
 W . W B W B . B
 . . . B W . . .
 B . . . . . . W
 . W . B W . B .

Kings > 3 may beis impossible?.

Queens > 3 may be impossible?

Kings > 3 may be impossible?

Queens, N = 4

14 of each can fit.
- Credit: daw on "Queens attacking exactly four queens"

 . B . W B . W .
 W . . . . . . B
 . . . W B . . .
 B . B W B W . W
 W . W B W B . B
 . . . B W . . .
 B . . . . . . W
 . W . B W . B .

Kings > 3 is impossible.

Some improvements to one color from comments
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Darrel Hoffman
Darrel Hoffman
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edited body
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RobPratt
RobPratt
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Another space missing
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Darrel Hoffman
Darrel Hoffman
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minor spacing issue
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Darrel Hoffman
Darrel Hoffman
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Only 8 queens at N=0, removing outdated text.
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Darrel Hoffman
Darrel Hoffman
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correction on N=0 Queens
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Darrel Hoffman
Darrel Hoffman
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Add single color solutions. WIP to compile the other solutions so far...
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Darrel Hoffman
Darrel Hoffman
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Thanks for the fixed-width assist, getting rid of that comment that no longer applies.
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Darrel Hoffman
Darrel Hoffman
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Fixed width added
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mbjb
mbjb
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Darrel Hoffman
Darrel Hoffman
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Post Made Community Wiki by Darrel Hoffman