"Queen Place" is the puzzle of using a chess piece "Queen".
"Queen Place" has been proven to be satisfied in the board size of 7x7 and 5x5.
I have confirmed that "Queen Place" is not satisfied in the board size of 8x8, 9x9 and 10x10.
I conjecture here that "Queen Place" is satisfied in the board size of only 7x7 and 5x5.
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