2. Bd4 Re2+ 3. Kc1 Nb4 4. Bg7 Rc2+ 5. Kd1 Be2+ 6. resigns, because 6. Ke1 Nd3 is checkmate. In this position, if White could exchange bishops (or rooks) he would reach a drawn position. However, Black has a winning attack: 1... Rb3+ 2. Kh2 Bc6 3. Rb8 Rc3 4. Rb2 Kf5 5. Bg3 Be4 6. Re2 Bg5 7. Rb2 Kg4 8. Rf2 Rc1 9. resigns Speelman gave these conclusions in 1981: Rook and two bishops versus rook and bishop – thought to be a win Rook, bishop, and knight versus rook and bishop – good winning chances, probably a win if the bishops are on opposite colors Rook, bishop, and knight versus rook and knight – thought to be a win. Later tablebase analysis confirmed that rook and two minor pieces versus rook and one minor piece is a general win. Summary Grandmaster Ian Rogers summarized several of these endgames. General result John Nunn also covers many pawnless chess endings in his book. He gives a "general result", which he describes as: "derived ... not by looking at statistics for winning percentages, which can be very misleading, but by personally examining the endings concerned." Fine's rule In his landmark 1941 book Basic Chess Endings, Reuben Fine inaccurately stated, "Without pawns one must be at least a Rook ahead in order to be able to mate. The only exceptions to this that hold in all cases are that the double exchange wins and that a Queen cannot successfully defend against four minor pieces." Kenneth Harkness also stated this "rule". Fine also stated "There is a basic rule that in endings without pawns one must be at least a rook ahead to be able to win in general." This inaccurate statement was repeated in the 2003 edition revised by Grandmaster Pal Benko. However, Fine recognized elsewhere in his book that a queen wins against a rook and that a queen normally beats a knight and a bishop (with the exception of one drawing fortress). The advantage of a rook corresponds to a five-point advantage using the traditional relative value of the pieces (pawn = 1, knight = 3, bishop = 3, rook = 5, queen = 9). It turns out that there are several more exceptions, but they are endgames that rarely occur in actual games. Fine's statement has been superseded by computer analysis. A four-point material advantage is often