The problem Clearly, we can put no more than N mutually nonattacking queens on the N × N board, since a row (or column) with two queens has queens that attack each other. However, if other pieces… Expand

A π separation number is the minimum number of pawns for which some arrangement of those pawns on the board will produce a board where π has some desired value.Expand

Chessboard separation problems are modifications to classic chessboard problems, such as the N Queens Problem, in which obstacles are placed on the chessboard. This paper focuses on a variation known… Expand

A legal placement of Queens is any placement of Queens on an order N chessboard in which any two attacking Queens can be separated by a Pawn. The Queens independence separation number is the minimum… Expand

If n is a nonnegative integer or infinity, and R is a (commutative unital) ring contained in a (commutative unital) ring T, then (R,T) is said to be an n-dimensional pair if every ring S that both… Expand

This paper currently (February 4, 2011) contains 330 references (originally in BibTeX format) to articles dealing with or at least touching upon the well-known n-Queens problem.Expand

If T is an integral commutative extension of a ring R such that R is an open ring, R[a, b] is a going-down ring for each a, b in T and T is semiquasilocal, then each ring contained between R and T is… Expand