%TITLE Longest mate in King and Bishop versus King and Bishop endgame: an endgame analysis by Joe Leslie-Hurd
%HEADING Longest mate in King and Bishop versus King and Bishop endgame
%SUBHEADING Mate in 1
%FOOTER An <a href="http://www.gilith/chess/endgames">endgame analysis</a> by <a href="http://www.gilith.com/">Joe Leslie-Hurd</a> on 16 February 2005.

[Event "Endgame analysis: longest mate in King, Bishop and Knight versus King"]
[Site "Oxford ENG"]
[Date "2005.02.16"]
[Round "-"]
[White "Perfect"]
[Black "Perfect"]
[Result "1-0"]
[Time "04:42:33"]
[Annotator "Joe Leslie-Hurd"]
[WhiteType "program"]
[BlackType "program"]
[SetUp "1"]
[FEN "K7/2kB4/8/8/8/8/8/5N2 w - - 0 1"]

{Mate in 33 with Bb5, Be6, Bf5 and Bh3. Worse are Ba4, Be8 and Bg4 with mate in 34, and Bc6, Bc8, Ka7, Nd2, Ne3, Ng3 and Nh2 which throw away the win.}
1. Be6 {White mates in 32 after Kc6 and Kd6. Worse are Kb6 and Kd8 when White mates in 31.}
1... Kd6 {Mate in 32 with Ba2, Bc4 and Bg8. Worse are Bb3, Bc8, Bf5, Bf7, Bg4 and Bh3 with mate in 33, and Bd5, Bd7, Ka7, Kb7, Kb8, Nd2, Ne3, Ng3 and Nh2 which throw away the win.}
2. Bg8 {White mates in 31 after Kc6 and Kc7. Worse are Kc5, Kd7, Ke5 and Ke7 when White mates in 30.}
2... Kc7 {Mate in 31 with Ka7, Ne3 and Ng3. Worse are Ba2, Bc4, Bf7 and Nd2 with mate in 32, and Bb3, Bd5, Be6, Bh7 and Nh2 with mate in 33.}
3. Ne3 {White mates in 30 after Kb6 and Kc6. Worse are Kd6 and Kd7 when White mates in 29, and Kc8 and Kd8 when White mates in 24.}
3... Kb6 {Mate in 30 with Kb8. Worse are Ba2, Bf7, Nc4+ and Nd5+ with mate in 31, and Bb3, Bc4, Bd5, Be6, Bh7, Nc2, Nd1, Nf1, Nf5, Ng2 and Ng4 with mate in 32.}
4. Kb8 {White mates in 29 after Kc5 and Kc6. Worse are Ka5 and Kb5 when White mates in 28, and Ka6 when White mates in 16.}
4... Kc6 {Mate in 29 with Nc4. Worse are Ka7, Kc8 and Nd5 with mate in 30, and Ba2, Bb3, Bc4, Bd5+, Be6, Bf7, Bh7, Ka8, Nc2, Nd1, Nf1, Nf5, Ng2 and Ng4 with mate in 31.}
5. Nc4 {White mates in 28 after Kb5 and Kd7. Worse is Kc5 when White mates in 27.}
5... Kb5 {Mate in 28 with Kb7 and Kc7. Worse are Be6, Bf7, Ka7, Ka8, Kc8, Na3+, Nb2, Nd2, Nd6+, Ne3 and Ne5 with mate in 30, Bd5 with mate in 31, and Bh7, Na5 and Nb6 which throw away the win.}
6. Kc7 {White mates in 27 after Kc5. Worse are Ka4 and Kb4 when White mates in 26, and Ka6 when White mates in 8.}
6... Kc5 {Mate in 27 with Bf7 and Kd7. Worse are Be6, Kb7, Na5, Nd2 and Nd6 with mate in 28, Kd8, Na3, Nb2, Nb6, Ne3 and Ne5 with mate in 29, Kb8 and Kc8 with mate in 30, and Bd5 and Bh7 which throw away the win.}
7. Kd7 {White mates in 26 after Kb4, Kb5 and Kd4.}
7... Kd4 {Mate in 26 with Kd6. Worse are Kc6 with mate in 27, Be6, Bf7, Kc7, Ke7, Na3, Na5, Nd2 and Nd6 with mate in 28, Kc8, Kd8, Ke8, Nb2 and Nb6 with mate in 29, and Bd5, Bh7, Ke6, Ne3 and Ne5 which throw away the win.}
8. Kd6 {White mates in 25 after Kc3, Kd3 and Ke4.}
8... Kd3 {Mate in 25 with Kd5. Worse are Ke5 and Na5 with mate in 26, Bd5, Be6, Bf7, Kc5, Kc6 and Na3 with mate in 27, Kc7, Kd7, Ke7, Nb2+, Nb6 and Ne5+ with mate in 28, and Bh7+, Ke6, Nd2 and Ne3 which throw away the win.}
9. Kd5 {White mates in 24 after Kc2 and Kc3. Worse is Ke2 when White mates in 21.}
9... Kc3 {Mate in 24 with Bh7. Worse are Kc5, Ke4 and Ne5 with mate in 25, Be6, Bf7, Ke5, Na3, Na5, Nb6, Nd6 and Ne3 with mate in 26, Kc6 and Kd6 with mate in 27, and Ke6, Nb2 and Nd2 which throw away the win.}
10. Bh7 {White mates in 23 after Kb3 and Kb4.}
10... Kb3 {Mate in 23 with Kd4. Worse are Be4 and Kc5 with mate in 24, Bb1, Bd3, Bf5, Bg6, Bg8, Na5+, Nb6, Nd2+, Nd6, Ne3 and Ne5 with mate in 25, and Bc2+, Kc6, Kd6, Ke4, Ke5, Ke6, Na3 and Nb2 which throw away the win.}
11. Kd4 {White mates in 22 after Kb4. Worse are Ka2 and Ka4 when White mates in 21.}
11... Kb4 {Mate in 22 with Nd2. Worse are Bb1, Bc2, Bd3, Be4, Bf5 and Bg6 with mate in 23, Bg8, Kd3, Nb2, Nb6, Nd6, Ne3 and Ne5 with mate in 24, Kd5 with mate in 25, and Ke3, Ke4, Ke5, Na3 and Na5 which throw away the win.}
12. Nd2 {White mates in 21 after Kb5. Worse are Ka3 and Ka4 when White mates in 20, and Ka5 when White mates in 19.}
12... Kb5 {Mate in 21 with Be4 and Bg8. Worse are Bb1, Bc2, Bd3+, Bf5, Bg6, Nb3 and Ne4 with mate in 22, Kd5, Ke5, Nb1, Nc4, Nf1 and Nf3 with mate in 23, Ke4 with mate in 24, and Kc3, Kd3 and Ke3 with mate in 27.}
13. Bg8 {White mates in 20 after Kc6. Worse are Kb6 when White mates in 19, Ka4 and Kb4 when White mates in 17, Ka5 when White mates in 14, and Ka6 when White mates in 13.}
13... Kc6 {Mate in 20 with Bd5+ and Nc4. Worse are Ba2, Bb3, Bc4, Be6, Bf7, Ke5, Nb3 and Ne4 with mate in 21, Nb1, Nf1 and Nf3 with mate in 22, Ke4 with mate in 23, Bh7 with mate in 26, Kd3 and Ke3 with mate in 27, and Kc3 and Kc4 with mate in 28.}
14. Bd5+ {White mates in 19 after Kb5, Kc7 and Kd6. Worse are Kb6 and Kd7 when White mates in 18.}
14... Kd6 {Mate in 19 with Nc4+. Worse are Nb3 and Ne4+ with mate in 20, Ba2, Bb3, Bc4, Nb1, Nf1 and Nf3 with mate in 21, Ke4 with mate in 22, Ba8, Bb7, Be4, Bf3, Bf7, Bg2, Bg8, Bh1 and Kc4 with mate in 27, and Bc6, Be6, Kc3, Kd3 and Ke3 which throw away the win.}
15. Nc4+ {White mates in 18 after Kd7. Worse are Ke7 when White mates in 17, and Kc7 when White mates in 16.}
15... Kd7 {Mate in 18 with Ke5. Worse are Ke4 with mate in 19, Na3, Na5, Nb2, Nb6+, Nd2 and Ne3 with mate in 20, Ne5+ with mate in 25, Bf7, Bg8, Kc3, Kc5, Kd3 and Ke3 with mate in 26, Ba8, Bb7, Be4, Bf3, Bg2 and Bh1 with mate in 27, and Bc6+, Be6+ and Nd6 which throw away the win.}
16. Ke5 {White mates in 17 after Ke7. Worse are Kd8 and Ke8 when White mates in 16, Kc7 when White mates in 12, and Kc8 when White mates in 11.}
16... Ke7 {Mate in 17 with Kf5 and Nb6. Worse are Be6 with mate in 18, Na3, Na5, Nb2, Nd2 and Ne3 with mate in 19, Nd6 with mate in 21, Ba8, Bb7, Bc6, Be4, Bf3, Bg2 and Bh1 with mate in 24, Bg8, Kd4, Ke4 and Kf4 with mate in 25, and Bf7 which throws away the win.}
17. Nb6 {White mates in 16 after Kf8. Worse are Ke8 when White mates in 15, and Kd8 when White mates in 12.}
17... Kf8 {Mate in 16 with Kf6. Worse are Nc8 with mate in 23, Kf5, Nc4 and Nd7+ with mate in 24, Ba2, Bb3, Bc4, Be4, Be6, Kd4, Kd6, Ke4, Ke6, Kf4, Na4 and Na8 with mate in 25, Ba8, Bb7, Bc6, Bf3, Bg2 and Bh1 with mate in 26, and Bf7 and Bg8 which throw away the win.}
18. Kf6 {White mates in 15 after Ke8.}
18... Ke8 {Mate in 15 with Bb3 and Bc4. Worse are Ba2, Be6, Bf7+ and Nc4 with mate in 16, Ba8, Bb7, Bc6+, Be4, Bf3, Bg2, Bg8, Bh1 and Ke6 with mate in 17, Ke5, Kf5, Kg5, Kg6 and Kg7 with mate in 18, Na4 and Na8 with mate in 20, Nc8 with mate in 23, and Nd7 which throws away the win.}
19. Bb3 {White mates in 14 after Kf8. Worse is Kd8 when White mates in 13.}
19... Kf8 {Mate in 14 with Nd7+. Worse are Ba2, Bc4, Bd5, Be6, Na4, Na8 and Nc8 with mate in 16, Bc2, Nc4 and Nd5 with mate in 22, Ba4, Bd1, Kg5 and Kg6 with mate in 23, Kf5 with mate in 24, Ke5 and Ke6 with mate in 25, and Bf7 and Bg8 which throw away the win.}
20. Nd7+ {White mates in 13 after Ke8.}
20... Ke8 {Mate in 13 with Ke6. Worse are Ba4 with mate in 14, Nb6, Nc5 and Ne5 with mate in 15, Be6 and Nb8 with mate in 16, and Ba2, Bc2, Bc4, Bd1, Bd5, Bf7+, Bg8, Ke5, Kf5, Kg5, Kg6, Kg7 and Nf8 which throw away the win.}
21. Ke6 {White mates in 12 after Kd8.}
21... Kd8 {Mate in 12 with Kd6. Worse are Ba4, Bc2, Bc4, Bd1 and Bd5 with mate in 13, Ba2 and Nc5 with mate in 14, Nb6, Nb8, Ne5, Nf6 and Nf8 with mate in 15, and Kd5, Ke5, Kf5, Kf6 and Kf7 which throw away the win.}
22. Kd6 {White mates in 11 after Ke8. Worse is Kc8 when White mates in 8.}
22... Ke8 {Mate in 11 with Ba2, Bc4, Bd5, Be6 and Bg8. Worse are Kc6, Kc7 and Ke6 with mate in 13, Nf6+ with mate in 22, Ne5 with mate in 24, Ba4, Bc2 and Bd1 with mate in 25, Nb6, Nb8 and Nc5 with mate in 26, and Bf7+, Kc5, Kd5, Ke5 and Nf8 which throw away the win.}
23. Bc4 {White mates in 10 after Kd8.}
23... Kd8 {Mate in 10 with Bf7. Worse are Bd3, Be2 and Nf6 with mate in 11, Ba2, Ba6, Bb3, Bb5, Bd5, Be6, Bf1, Bg8, Nb6, Nb8, Nc5, Ne5 and Nf8 with mate in 12, Kc6 and Ke6 with mate in 13, and Kc5, Kd5 and Ke5 which throw away the win.}
24. Bf7 {White mates in 9 after Kc8.}
24... Kc8 {Mate in 9 with Nc5. Worse are Bg6 and Bh5 with mate in 10, Ba2, Bb3, Bc4, Bd5, Be6, Be8, Bg8, Kc6, Nb6+ and Ne5 with mate in 11, Nf8 with mate in 13, Nf6 with mate in 14, Ke7 with mate in 15, Ke6 with mate in 16, and Kc5, Kd5, Ke5 and Nb8 which throw away the win.}
25. Nc5 {White mates in 8 after Kd8. Worse is Kb8 when White mates in 6.}
25... Kd8 {Mate in 8 with Nb7+ and Ne6+. Worse are Bg6 and Bh5 with mate in 9, Na4, Na6, Nb3, Nd3, Nd7 and Ne4 with mate in 10, Ba2, Bb3, Bc4, Bd5, Be6 and Bg8 with mate in 12, Ke6 with mate in 14, Ke5 with mate in 18, Kd5 with mate in 27, Kc6 with mate in 28, and Be8 which throws away the win.}
26. Ne6+ {White mates in 7 after Kc8.}
26... Kc8 {Mate in 7 with Kc6. Worse are Nc5 with mate in 9, Be8, Bg6 and Bh5 with mate in 11, Nd4 with mate in 12, Bg8, Ke7, Nc7, Nf4, Nf8, Ng5 and Ng7 with mate in 13, Ke5 with mate in 20, Kd5 with mate in 24, Kc5 with mate in 26, and Nd8 which throws away the win.}
27. Kc6 {White mates in 6 after Kb8.}
27... Kb8 {Mate in 6 with Kb6. Worse are Be8, Bg6 and Bh5 with mate in 7, Bg8, Nc5, Nc7, Nd4, Nd8, Nf8 and Ng5 with mate in 8, Kb5, Nf4 and Ng7 with mate in 9, Kc5 with mate in 10, Kd5 and Kd6 with mate in 11, and Kd7 with mate in 13.}
28. Kb6 {White mates in 5 after Ka8 and Kc8.}
28... Kc8 {Mate in 5 with Be8. Worse are Kc6 with mate in 7, Nd4, Nf8 and Ng7 with mate in 15, Nf4 with mate in 16, Bg8 and Kc5 with mate in 26, Kb5 with mate in 28, Nc5, Nc7 and Ng5 with mate in 29, Bg6 and Bh5 with mate in 30, Ka5, Ka6 and Ka7 with mate in 31, and Nd8 which throws away the win.}
29. Be8 {White mates in 4 after Kb8.}
29... Kb8 {Mate in 4 with Bd7. Worse are Ba4, Bb5, Bc6, Bf7, Bg6, Bh5, Ka6, Nc5, Nc7, Nd4, Nd8, Nf4, Nf8, Ng5 and Ng7 with mate in 6, Kc6 with mate in 7, and Ka5, Kb5 and Kc5 with mate in 8.}
30. Bd7 {White mates in 3 after Ka8.}
30... Ka8 {Mate in 3 with Nc5 and Nc7+. Worse are Ba4, Bb5, Bc6+, Bc8, Be8, Ka6, Kc7, Nd4, Nd8, Nf4, Nf8, Ng5 and Ng7 with mate in 5, Kc6 with mate in 6, Ka5 and Kb5 with mate in 7, and Kc5 with mate in 8.}
31. Nc7+ {White mates in 2 after Kb8.}
31... Kb8 {Mate in 2 with Na6+. Worse are Nb5, Nd5, Ne6 and Ne8 with mate in 4, Ba4, Bb5, Bc6 and Be8 with mate in 6, Kc6 with mate in 8, and Bc8, Be6, Bf5, Bg4, Bh3, Ka5, Ka6, Kb5, Kc5 and Na8 which throw away the win.}
32. Na6+ {White mates in 1 after Ka8.}
32... Ka8 {Mate in 1 with Bc6#. Worse are Nb4, Nc5 and Nc7+ with mate in 3, Kc7 with mate in 5, Kc6 with mate in 6, Ka5, Kb5 and Kc5 with mate in 8, and Ba4, Bb5, Bc8, Be6, Be8, Bf5, Bg4, Bh3 and Nb8 which throw away the win.}
33. Bc6# {Checkmate.} 1-0
