used. Miscellaneous pawnless endings Other types of pawnless endings have been studied. Of course, there are positions that are exceptions to these general rules stated below. The fifty-move rule is not taken into account, and it would often be applicable in practice. When one side has two bishops, they are assumed to be on opposite colored squares, unless otherwise stated. When each side has one bishop, the result often depends on whether or not the bishops are on the same color, so their colors will always be stated. Queens only Queen versus queen: usually a draw, but the side to move first wins in 41.75% of the positions. There are some wins when one queen is in the corner, e.g. as a result of promoting a rook pawn or bishop pawn. Two queens versus one queen: Almost always a win. A cross-check may be necessary, see cross-check#Two queens versus one for an example. A draw is possible in a few exceptional positions if the weaker side has an immediate perpetual check, e.g. with a white king on a1 and white queens on a2 and b1, the black king on e8, and the black queen giving check on d4. Black has as an unlimited supply of checks on d4, a4, and d1, and the white king cannot escape the corner. Two queens versus two queens: The first to move wins in 83% of the positions (see the Comte vs. Le Roy diagram for an example). Wins require up to 44 moves. Major pieces only Queen versus rook: see above. Queen versus two rooks: this is usually a draw, but either side may have a win. Queen versus three rooks: this is nearly always a win for the rooks. This is rare in serious play, and occurs when promoting to a queen would give stalemate, but three rooks versus a queen is usually a straightforward win, especially when the defending king must be quite well confined for stalemate to be an issue for QRR v Q. Queen and a rook versus a queen and a rook: Despite the equality of , the player to move first wins in 83% of the positions. In a rook and pawn ending, if both sides queen a pawn, the side that gives check first frequently wins. Queen and rook versus a queen: this is a win. Two rooks versus a rook: this is usually a win