combinatorics - How to come up with this recurrence relation for putting p rooks in a m×n chessboard? - Mathematics Stack Exchange

I have a m×n chessboard and I have to put p rooks in the board so that no two of them are in attacking position. (Two rooks attack each other if they are in the same row or same column) How many wa

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combinatorics - How to come up with this recurrence relation for putting p rooks in a m×n chessboard? - Mathematics Stack Exchange

combinatorics - Use of rook polynomials - Mathematics Stack Exchange

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combinatorics - Number of ways of placing $4$ knights on a $4 imes 4$ board such that for every knight, there is an unique knight attacking it - Mathematics Stack Exchange

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combinatorics - Use of rook polynomials - Mathematics Stack Exchange

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combinatorics - Independence problem: one rook and maximum number of knights on the chessboard $8 imes 8$ - Mathematics Stack Exchange