combinatorics - How many different ways can we place 4 identical rooks on the following chess board - Mathematics Stack Exchange

How many different ways can we place 4 identical rooks on the following chess board so that no two of them attack each other? I know when the board is $n \times n$ and we have $n$ towers then the

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algorithm - Programmer Puzzle: Encoding a chess board state throughout a game - Stack Overflow

On an 8x8 chessboard, a pawn has been placed on the third column and fourth row (C4). Is it possible to place nine rooks on this board so that no two rooks

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algorithm - Programmer Puzzle: Encoding a chess board state throughout a game - Stack Overflow

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