Eight Queens, No Truce

Place eight queens on a standard 8×8 chessboard. Every queen attacks along its row, its column, and both diagonals. Your placement must leave every pair of queens unable to attack each other. Count arrangements by exact square positions: rotating or reflecting a placement usually produces a different arrangement and should be counted separately. The board is fixed in place, with its rows and columns distinguished. Since no two queens may share a row, a successful arrangement necessarily has exactly one queen in each row. How many distinct valid arrangements are possible?