Worse are Ba6, Ba7, Ba8, Bc5, Bc6, Bc7+, Bf2, Bg1, Ke3 and Kg3 with mate in 15, Ba5, Bc8, Bd8, Ke2, Kf2 and Kg2 with mate in 16, and Bd4+ and Bd5 which throw away the win. Worse are Kd7, Ke6 and Ke7 when White mates in 13. Worse are Ba8, Bd4, Bf3, Kf2 and Kh2 with mate in 16, Ba5, Ba6, Ba7, Bd8, Be3, Bf2, Bg1, Kf1, Kg1 and Kh1 with mate in 17, Bc8 with mate in 18, and Bc5+, Bc6, Bc7+ and Bd5 which throw away the win.
Worse are Ke7 and Ke8 when White mates in 14. Worse are Ba5, Bf6, Bg5 and Bh4 with mate in 17, and Ba6, Ba8, Bc6+, Bc7, Bc8+, Bd5, Be4, Be7, Bf3, Kf1, Kf2, Kf3, Kg1, Kg3, Kh1, Kh2 and Kh3 which throw away the win. White mates in 16 after Kc5, Kd7 and Ke5. Worse are Ba5, Ba8, Bf3, Bg5, Bh4 and Kg1 with mate in 18, Ba6, Bc8, Be4, Bf6 and Bg2 with mate in 19, and Bc6, Bc7+, Bd5 and Be7+ which throw away the win. Worse are Kb4 and Kc4 when White mates in 16. White mates in 17 after Kb5, Kd4 and Kd6. Worse are Bd7, Be4, Be8 and Bg2 with mate in 19, Ba4 with mate in 20, and Ba5, Bb5, Bb6+, Bc7, Bd5, Be7+, Bf6, Bg5, Bh4, Kg1, Kg2 and Kh2 which throw away the win. Worse are Kb3, Kc3 and Kc4 when White mates in 15, and Ka3 when White mates in 14. Worse are Ba5+, Bb3, Bb5, Bb6, Bc7, Be7+, Bf6, Bg5, Bh4, Kg1, Kg2 and Kh2 which throw away the win. Mate in 19 with Bc2, Bc6, Bd1, Bd7 and Be8. In fact, it is impossible for any number of bishops on the same color to checkmate a lone king.Longest mate in King and 2 Bishops versus King endgame: an endgame analysis by Joe Leslie-Hurd Longest mate in King and 2 Bishops versus King endgame Mate in 19Also available in PGN notation. ↑ It is always implicitly assumed that the bishops of the same side are on opposite-colored squares, since same-colored bishops can only happen with an unlikely underpromotion.This means that the definition of the fifty-move rule now specifically excludes king-and-two-knights-versus-king-and-pawn positions.) The ending of two knights versus one pawn has occasionally occurred in practical tournament play. (The exception to this rule has since been rescinded the rule now dictates that either player may claim a draw after 50 moves without a capture or pawn move, regardless of the position on the chessboard. This endgame has some historic interest - it was included in the amendment of the "50 move draw rule" to exclude those positions in which it could be demonstrated that more moves were required. Some positions require as many 70 moves without a pawn move or capture. Alexey Troitsky, the famous endgame study composer, produced an extensive analysis of this endgame and composed several endgame studies with two knights against one pawn. This is more likely to succeed if the black pawn is not far advanced, and needs at least three moves to become a queen. If Black has one pawn, White may be able to win by cornering the black king with a king and one knight, and avoiding stalemate by letting Black to advance his pawn, while the other knight administers mate. It is easier if the losing side's king is hemmed in by his own pieces, like that to the near left. However, checkmate can happen with king and two knights against king if the opponent makes enough foolish moves, ending with a checkmate position like those to the left. Checkmate! Notice how the checkmate is easier now that the black king is hemmed in by his own rook and pawn, and the king no longer has to be nearby.
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