Arrange the queens
These are the two possible solutions.
This is usually solved with guesswork and checks, although using logic may be faster. We know that each queen must be in it’s own row vertically and horizontally. We also know that 4 of the queens must be on white and 4 on black. This is true as because with 4 queens on the same color all of the rest of that colored squares are vulnerable to be attacked. (It could be done with maths.)
Your Answer
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