[Retros] Shortest Knight Checkmates [record list]

[CAILLAUDM at aol.com]

Hello,
 
Hum...Some of these games look suspicious if they are compared to those  
produced by computer, and there should be ways to improve a good number...
Below is result with double checkmates on 7th and 8th rank now reduced at  
7,0 at the most.
 
II. Double Checkmates

--- Knight to the 8th rank ---

[Nb] 1.Nc3 Nf6 2.Nd5 Ne4 3.Nxe7 Nc3 4.Ng8 Bb4 5.d3 Qe7 6.Kd2  Nb1# 

[Nc] 1.e4 e5 2.Qe2 Qg5 3.Qa6 Qxd2+ 4.Nxd2 Bc5 5.Nc4 Ke7 6.Nb6  Kd6 7.Nxc8#

[Nd] 1.d4 Nf6 2.d5 Nxd5 3.Bg5 Ne3 4.Bxe7 Qxe7 5.f3 Qc5 6.Kf2  Bd6 7.Qe1 Nd1#
also Knight to the 5th rank [Ng]   7...Ng4#

[Ne] 1.Nf3 g6 2.Ne5 Bg7 3.Nxd7 Bc3 4.Nf6+ Kf8 5.dxc3 Kg7 6.Qd4  Qf8 7.Ne8#
also Knight to the 5th rank [Nh]  7.Nh5#

[Nf] 1.d4  Na6 2.Qd3 Nc5 3.Qxh7 Ne4 4.Bf4 Ng3 5.Qe4 Rh3 6.Kd2 Nh6 7.Ke3 Nxf1#

[Ng]  1.Nf3 Nc6 2.Ne5 Nd4 3.Nxd7 Bxd7 4.e3 Nf3+ 5.Ke2 Bg4 6.Qe1 Ng1#

--- Knight  to the 7th rank ---

[Na] 1.e4 c5 2.Ba6 Nxa6 3.d3 Nb4 4.Bf4 Qa5 5.Bb8 d6  6.Kd2 Be6 7.Kc3 Nxa2#

[Nb] 1.e3 e5 2.Qg4 Bb4 3.Qxd7+ Nxd7 4.Kd1 Nc5 5.d3  Nxd3 6.Ne2 Nxb2#
also [Nf]  6...Nxf2#

[Nd] 1.e4 b6 2.Bb5 Ba6 3.Bxd7+ Nxd7 4.Qe2  Ne5 5.Kf1 Nc4 6.Qe1 Nxd2#
same length as game by Hirokaz but one capture less

[Ng] 1.e4 h5  2.Qxh5 e6 3.Qe5 Rh3 4.Nxh3 g5 5.Nf4 g4 6.Nxe6 g3 7.Ng7#


Probably computer (and humans) will still produce improvements on some of  
these in the future.
 
Best,
 Michel

 
 
Dans un e-mail daté du 28/10/2007 22:33:17 Europe de l'Ouest,  
glkoon at yahoo.co.jp a écrit :

Hello,

Satoru Hayakawa sent me this game.
1.  Pd2-d4   Cg8-f6     2. Cb1-d2    Cf6-d5     3. Cd2-b3   Cd5-b4    
4.  Re1-d2   Pd7-d5     5. Rd2-c3    Fc8-d7     6. Fc1-d2   Fd7-b5    
7.  Fd2-e1   Pc7-c6     8. Dd1-d2    Dd8-a5     9. Ta1-d1   Cb4xa2     
(Knight double checkmate)

So the recent record list is as  follows.

Amici  Sumus,
Hiro



--------------------------
Shortest Knight  Checkmates
--------------------------


(As for Checkmates at the  moment of promotion, see Shortest Pawn Mates)


I. Single Checkmates,  by Knight itself


Knight to the 8th rank
[Na] 1.Nc3 d5 2.Nxd5 c6  3.Nb6 Qxd2 4.Bxd2 Kd8 5.Be3 Kc7 6.Nxa8# (Hirokaz
Onoda, 2007)
[Nb] 1.a4  Nf6 2.Ra3 Ne4 3.Rd3 Nxd2 4.Rxd7 Qxd7 5.e3 Qxa4 6.Ke2 c6 7.Kd3 Bf5
8.Kc3  Nxb1# (Hirokaz Onoda, 2007)
[Nc] 1.a4 e5 2.a5 Ke7 3.a6 Kd6 4.axb7 Be7  5.bxa8N Ba6 6.Nb6 Bxe2 7.Qxe2 Qf8
8.Qc4 Bd8 9.Nc8# (Hirokaz Onoda,  2007)
[Nd] 1.Nf3 e5 2.Nxe5 Bb4 3.Nxf7 Bxd2 4.Qxd2 Ke7 5.Qg5 Ke6 6.Bf4 h6  7.Nxd8#
(Hirokaz Onoda, 2007)
[Ne] 1.d4 g6 2.d5 Bh6 3.d6 Kf8 4.dxe7 Kg7  5.exd8N d5 6.Nxb7 Nd7 7.Nd6 Nf8
8.Ne8# (Nicolas Dupont, 2006)
Fewer captures: 1.d4 g6 2.d5 Bh6 3.d6 Kf8 4.dxc7 Kg7 5.cxd8N Kf6  6.Ne6
Bf8 7.Nc7 Kg7 8.Ne8# (Hirokaz Onoda, 2007)
[Nf] 1.e4 f6 2.e5 Kf7  3.e6 Kg6 4.exd7 Qe8 5.d8N h6 6.Ne6 Kh7 7.Bd3 Qg6
8.Nxf8# (Hirokaz Onoda,  2007)
[Ng] 1.f4 e6 2.f5 Qe7 3.f6 Qd6 4.fxg7 Nf6 5.g8N Bg7 6.Nh6 Ke7 7.d3  Rd8
8.Kd2 Bf8 9.Kc3 Ne8 10.Ng8# (Andrey Frolkin, 2006)
[Nh] 1.f3 Nc6  2.Kf2 Nd4 3.Qe1 Nf5 4.d4 Ng3 5.Be3 Nxh1# (Francois  Labelle,
2007)

Knight to the 7th rank
[Na] 1.Nc3 d5 2.Nxd5 Be6  3.Nxe7 Kd7 4.Nc6 Kc8 5.c3 Nd7 6.Qc2 Rb8 7.Nxa7#
(Hirokaz Onoda,  2007)
[Nb] 1.c4 d5 2.c5 Qd7 3.c6 Kd8 4.cxb7 Qe8 5.bxc8N Nd7 6.Nd6 Rc8  7.Nb7#
(Hirokaz Onoda, 2007)
[Nc] 1.d4 e6 2.Bg5 Ba3 3.Nxa3 Qe7 4.Nb5 Qf8  5.Nxc7# (Francois Labelle,
2004)
with promotion:  1.a4 c5 2.a5 Qb6 3.axb6 Nc6 4.bxa7 Rb8 5.a8=N Nd8
6.Nc7# (Francois Labelle,  2007)
[Nd] 1.c4 g6 2.c5 Bg7 3.c6 Kf8 4.cxd7 Nc6 5.dxc8N Qd7 6.Nb6 Re8  7.Nxd7#
(Hirokaz Onoda, 2007)
[Ne] 1.Nc3 e6 2.Nd5 Qh4 3.c3 Be7 4.Qc2 Bg5  5.Qxh7 Nf6 6.Qh5 O-O 7.Ne7#
(Hirokaz Onoda, 2007)
[Nf] 1.d3 c5 2.Bh6  Nxh6 3.g4 Nxg4 4.Qc1 Qa5+ 5.Kd1 Nxf2# (Francois Labelle,
2007)
with promotion: 1.f4 c5 2.f5 Qc7 3.f6 Kd8 4.fxg7 Nf6 5.gxh8=N  Ne8
6.Nxf7# (Francois Labelle, 2007)
[Ng] 1.g4 Nc6 2.Bg2 Ne5 3.Bc6 Nxg4  4.Nf3 Ne3 5.Rf1 Ng2# (Francois Labelle,
2007)
[Nh] 1.Nc3 e5 2.Ne4 Ke7  3.Ng5 Kf6 4.e3 Ne7 5.Qg4 Rg8 6.Nxh7# (Francois
Labelle,  2007)


Knight to the 6th rank
[Na]
[Nb] 1.Nc3 d5 2.Nxd5 Be6  3.c3 Kd7 4.Qa4+ Kc8 5.Qc6 a5 6.Nb6# (Francois
Labelle, 2007)
[Nc] 1.Nc3  d5 2.Nxd5 b5 3.Nxe7 Qxd2+ 4.Qxd2 Nd7 5.Qe3 Kd8 6.Nc6# (Francois
Labelle,  2007)
[Nd] 1.c4 Na6 2.c5 Nxc5 3.e3 a6 4.Ne2 Nd3# (Richard Stanley &  Noam D.
Elkies, 1996)
with promotion: 1.c4 e5 2.c5  Ne7 3.c6 Rg8 4.cxb7 c5 5.bxc8=N Nbc6
6.Nd6# (Francois Labelle,  2007)
[Ne] 1.e4 g6 2.e5 Bg7 3.e6 Kf8 4.exd7 Qe8 5.d8N Be6 6.Qf3 Nd7  7.Nxe6#
(Christoph Fieberg, 2002)
[Nf] 1.Nf3 g5 2.Ne5 g4 3.Nxd7 e5 4.a3  Ne7 5.Nf6# (Noam D. Elkies, 2002)
with promotion: 1.f4  e5 2.f5 Ba3 3.f6 Ne7 4.fxg7 Rf8 5.g8=N Na6 6.Nf6#
(Francois Labelle,  2007)
[Ng] 1.h4 Nf6 2.h5 Nxh5 3.c3 f6 4.Qa4 Kf7 5.Qc6 dxc6 6.f3 Bd7 7.Kf2  Be8
8.Ke3 Qxd2 9.Ke4 Ng3# (Hirokaz Onoda, 2007)
[Nh] 1.Nc3 g5 2.Nd5 Bg7  3.Nxe7 Bxb2 4.Nf5 Ne7 5.Bxb2 O-O 6.Nh6# (Francois
Labelle,  2007)


Knight to the 5th rank
[Na] captureless: 1.d4 d5 2.Nd2 Kd7  3.Nb3 Kc6 4.Qd2 Kb5 5.a4 Kc4 6.Na5#
(Hirokaz Onoda, 2007)
[Nb]  captureless: 1.e4 e5 2.Ne2 Ke7 3.Nec3 Kd6 4.Qe2 Kc5 5.b4+ Kd4  6.Nb5#
(Francois Labelle, 2007)
[Nc] captureless: 1.d4 d5 2.Nd2 Kd7  3.Nb3 Kc6 4.Bd2 Kb5 5.e4 Ka4 6.Nc5#
(Hirokaz Onoda, 2007)
[Nd]  captureless: 1.c4 e5 2.Qa4 Bb4 3.Kd1 c5 4.Kc2 Nc6 5.Kb3 Nd4#  (Francois
Labelle, 2007)
[Ne] captureless: 1.c3 f5 2.Qb3 f4 3.Qb6 Kf7  4.Nf3 Qe8 5.Ne5# (Francois
Labelle, 2007)
[Nf] captureless: 1.e4 e5  2.Ke2 Ne7 3.Kf3 Ng6 4.Kg4 d5 5.Kh5 Nf4# (Hirokaz
Onoda, 2007)
[Ng]  captureless: 1.d3 e5 2.Bh6 Qf6 3.Kd2 Qc6 4.Ke3 Nf6 5.Nd2 Ng4#
(Francois  Labelle, 2007)
[Nh] captureless: 1.e4 e5 2.Ne2 Ke7 3.Ng3 Kf6 4.Qe2 Kg5 5.h4  Kf4 6.Nh5#
(Hirokaz Onoda, 2007)

Knight to the 4th rank
[Na]  captureless: 1.e3 d6 2.Ne2 Kd7 3.Nec3 Kc6 4.Qf3+ Kc5 5.Qd5+ Kb6  6.Na4#
(Francois Labelle, 2007)
[Nb] 1.Nc3 d5 2.Nxd5 Bd7 3.c3 Bb5 4.Qa4  Kd7 5.Qd4 Kc6 6.Nb4# (Francois
Labelle, 2007)
[Nc] captureless: 1.e3 d5  2.Ba6 Qd7 3.Ke2 Qg4+ 4.Kd3 Nd7 5.Nc3 Nc5#
(Francois Labelle, 2007)
[Nd]  captureless: 1.e3 c5 2.Ke2 Qa5 3.Kd3 Qa4 4.Kc3 Nf6 5.Bd3 Nd5#
(Francois  Labelle, 2007)
[Ne] captureless: 1.f3 d5 2.Kf2 Qd6 3.Ke3 Nd7 4.Kd4 Qc5+  5.Kd3 Ne5#
(Francois Labelle, 2007)
[Nf] captureless: 1.d3 e5 2.Bh6 Qh4  3.Kd2 Bb4+ 4.Ke3 Ne7 5.Nf3 Nf5#
(Francois Labelle, 2007)
[Ng] 1.Nc3 d5  2.Nxd5 e6 3.Ne3 Ke7 4.d4 Kf6 5.Qd3 Be7 6.Ng4# (Francois
Labelle,  2007)
[Nh] captureless: 1.e3 f6 2.Qf3 Kf7 3.Qd5 Kg6 4.Nf3 Nh6 5.Nh4#  (Hirokaz
Onoda, 2007)

Knight to the 3rd rank
[Na] captureless:  1.d4 d5 2.Kd2 Kd7 3.Kc3 Ke6 4.Kb4 Bd7 5.Kc5 Na6# (Hirokaz
Onoda,  2007)
[Nb] captureless: 1.e4 e5 2.Ke2 Bc5 3.Kd3 d6 4.Kc4 Nd7 5.Kd5 Nb6#  (Hirokaz
Onoda, 2007)
captureless: 1.d3 f6 2.Qd2 Kf7  3.Qf4 Ke6 4.Nd2 Kd5 5.Qf5 Kd4 6.Nb3#
(Hirokaz Onoda, 2007)
[Nc] 1.e3 e6  2.Qf3 Ke7 3.Qxb7 Kd6 4.Qxc7+ Kd5 5.Nc3# (Francois Labelle,
2007)
captureless: 1.d3 e6 2.Kd2 Qg5 3.Kc3 Ne7 4.Kd4 Qg4 5.Ke5  Nec6#
(Hirokaz Onoda, 2007)
[Nd] 1.c3 d5 2.Qc2 Bh3 3.Nxh3 Kd7 4.Nf4 Kd6  5.Qg6+ Ke5 6.Nd3# (Francois
Labelle, 2007)
[Ne] 1.d4 Nc6 2.Kd2 Nxd4  3.Ke3 c6 4.Kf4 Qc7 5.Kg5 Qxh2 6.f4 Qh3 7.Rh2 Ne6#
(Hirokaz Onoda,  2007)
[Nf] captureless: 1.e3 f5 2.Qf3 Kf7 3.Bc4 Kf6 4.Qc6 Ke5 5.Nf3#  (Goeran
Forslund, 1996)
[Ng] 1.e3 e6 2.Qg4 Ke7 3.Ne2 Kf6 4.Qxg7+ Kf5  5.Ng3# (Francois Labelle,
2007)
captureless: 1.f3 e6  2.Kf2 Qf6 3.Kg3 Qf5 4.Kh4 Ne7 5.g3 Ng6# (Hirokaz
Onoda, 2007)
[Nh]  captureless: 1.e4 e5 2.Ke2 Ke7 3.Kf3 Kd6 4.Kg4 Be7 5.Kf5 Nh6#  (Hirokaz
Onoda, 2007)

Knight to the 2nd  rank
[Na]
[Nb]
[Nc]
[Nd] captureless: 1.d4 d5 2.Kd2 Be6 3.Kc3 Qd7  4.Kb4 Qa4 5.Kc5 Nd7# (Hirokaz
Onoda, 2007)
[Ne] captureless: 1.e4 e5  2.Ke2 Ke7 3.Kf3 Kd6 4.Kg4 Qh4 5.Kf5 Ne7# (Hirokaz
Onoda,  2007)
[Nf]
[Ng]
[Nh]

Knight to the 1st rank
[Na]
[Nb]  captureless: 1.d3 d6 2.Be3 Kd7 3.Qd2 Kc6 4.Qc3 Kb5 5.Nd2 Ka4 6.b3  Ka3
7.Nb1# (Hirokaz Onoda, 2007)
[Nc]
[Nd]
[Ne]
[Nf] 1.d3 h6  2.Bxh6 Nf6 3.Bg5 Nh5 4.Bxe7 Bxe7 5.Kd2 Bb4 6.Ke3 d6 7.Ke4 Nd7
8.Kf5 f6  9.Kg6 Nf8# (Hirokaz Onoda, 2007)
[Ng] captureless: 1.e3 e6 2.Ke2 Bd6 3.Kf3  Qf6 4.Kg4 Ne7 5.Kh5 g6 6.Kh6 Ng8#
(Itamar Faybish, 2006)
[Nh] 1.d3 h6  2.Bxh6 f5 3.Bg5 Nh6 4.Kd2 Nf7 5.Ke3 f4 6.Ke4 Rh3 7.Kf5 d6
8.Kg6 Nh8#  (Hirokaz Onoda,  2007)


--------------------------------


II. Double  Checkmates


--- Knight to the 8th rank ---

[Na] 1.Nc3 d5  2.Nxd5 c6 3.Nb6 Qxd2 4.Bxd2 Kd8 5.Ba5 Kc7 6.Nxa8# (Hirokaz
Onoda,  2007)

[Nb] 1.e4 d5 2.exd5 Nc6 3.dxc6 e6 4.cxb7 Bd6 5.b8N Ne7 6.Nc6 Kd7  7.Bb5 Re8
8.Nb8# (Hirokaz Onoda, 2007)
{without promotion: 1.Nc3 d5  2.Nxd5 Kd7 3.Nxe7 Qe8 4.Nc6 Qxe2 5.Qxe2 Be7
6.Qe5 Bd8 7.Bb5 Ne7 8.Nb8#  (Hirokaz Onoda, 2007)}

[Nc] 1.c4 e6 2.c5 Be7 3.c6 Bf6 4.cxb7 Nc6  5.bxc8N Rb8 6.Nd6 Ke7 7.Qc2 Qe8
8.Qc5 Nd8 9.Nc8# (Hirokaz Onoda,  2007)

[Nd] 1.e4 Nf6 2.e5 Nh5 3.e6 f6 4.exd7 Kf7 5.Qg4 Qe8 6.d8N Kg8  7.Ne6 Kf7
8.Bc4 Rg8 9.Nd8# (Hirokaz Onoda, 2007)
{without promotion:  1.Nf3 b6 2.Ne5 Ba6 3.Nxd7 Bxe2 4.Ne5 Bh5 5.Nc6 Kd7
6.Qf3 Kc8 7.Be2 Kb7  8.O-O Qc8 9.Nd8# (Hirokaz Onoda, 2007)}

[Ne] 1.d4 g6 2.d5 Bh6 3.d6 Kf8  4.dxe7 Kg7 5.e8N Kf8 6.Nf6 Kg7 7.Qd4 Qf8
8.Ne8# (Hirokaz Onoda,  2007)
{without promotion: 1.Nf3 g6 2.Ne5 Bh6 3.Nxd7 Bxd2 4.Bxd2 c6 5.Nf6  Kf8
6.Bc3 Kg7 7.Qd2 Qf8 8.Ne8# (Hirokaz Onoda, 2007)}

[Nf] 1.e4 f6  2.e5 Kf7 3.e6 Kg6 4.exd7 h6 5.dxc8N Kh7 6.Nxe7 Qc8 7.Ng6 Bd6
8.Bd3 Be5  9.Nf8# (Hirokaz Onoda, 2007)

[Ng] 1.Nc3 d5 2.Nxd5 e6 3.Nf6 Ke7 4.c3  Qxd2 5.Bxd2 Bd7 6.Bg5 Be8 7.Nxg8#
(Hirokaz Onoda, 2007)
{with promotion:  1.d4 e5 2.dxe5 Nf6 3.exf6 d6 4.fxg7 Be6 5.g8N Nd7 6.Nf6
Ke7 7.Bg5 Qe8  8.Ng8# (Hirokaz Onoda, 2007)}

[Nh] 1.Nf3 e5 2.Nxe5 Qe7 3.Ng6 Qxe2  4.Bxe2 h5 5.Bxh5 f6 6.Qe2 Kf7 7.Nxh8#
(Hirokaz Onoda, 2007)


---  Knight to the 7th rank ---

[Na] 1. d4 Nf6 2. Nd2 Nd5 3. Nb3 Nb4 4. Kd2  d5 5. Kc3 Bd7 6. Bd2 Bb5 7. Be1
c6 8. Qd2 Qa5 9. Rd1 Nxa2# (Satoru  Hayakawa, 2007)

[Nb] 1.Nf3 e5 2.Nxe5 Bb4 3.Nxf7 Bxd2 4.Bxd2 d6 5.Bb4  Bd7 6.Qd2 Qc8 7.Nxd6
Kd8 8.Kd1 Be8 9.Nxb7# (Hirokaz Onoda,  2007)

[Nc] 1.d3 Nf6 2.Bf4 Nd5 3.Bxc7 Nb4 4.Bd6 Qa5 5.c4 Nc2# (Francois  Labelle,
2007)
invisible: 1.f4 Nf6 2.f5 Ne4 3.f6  Nxd2 4.fxe7 Nxb1 5.exf8N Nc3 6.Ne6
Nxe2 7.Qxe2 Rf8 8.Nxc7# (Hirokaz Onoda,  2007)

[Nd] 1.e4 Nc6 2.e5 Nxe5 3.Bb5 Nc4 4.Bxd7 Bxd7 5.Kf1 Bb5 6.Qe1  Nxd2#
(Hirokaz Onoda, 2007)

[Ne] 1.Nf3 Nc6 2.Ne5 Nd4 3.f3 c6 4.Kf2  Qb6 5.Kg1 Nxe2# (Francois Labelle,
2007)

[Nf] 1.g3 Nf6 2.Bh3 Ne4  3.Bxd7 Bxd7 4.Nh3 Bc6 5.O-O Qd7 6.Kh1 Kd8 7.Rg1
Nxf2# (Hirokaz Onoda,  2007)

[Ng] invisible: 1.f4 Nf6 2.f5 Ne4 3.f6 Nxd2 4.fxe7 Nxb1 5.exf8N  Nc3 6.Ne6
Nxe2 7.Qxe2 Rf8 8.Nxg7# (Hirokaz Onoda, 2007)

[Nh] 1.Nc3  d5 2.Nxd5 e6 3.c3 Be7 4.Qa4 Kf8 5.Qf4 f6 6.Nxf6 Qe8 7.Nxh7#
(Hirokaz Onoda,  2007)


--- Knight to the 6th rank ---

[Na] 1.d4 Nc6 2.d5 Na5  3.d6 c6 4.dxe7 Qb6 5.exf8N Kd8 6.Bg5 Kc7 7.Ne6 Kb8
8.Nc7 Nf6 9.Qd6 Rd8  10.Na6# (Hirokaz Onoda, 2007)

[Nb] 1.e3 d5 2.Qg4 Bf5 3.Nf3 Kd7 4.Ne5+  Kc8 5.Nd7 Bd3 6.Nb6# (Francois
Labelle, 2007)
invisible: 1.d3 e5 2.Bf4 exf4 3.Kd2 f3 4.Kc1 fxg2 5.Nf3 gxf1N 6.Rg1
Nd2  7.Rxg7 Qg5 8.Rxg8 Nb3# (Hirokaz Onoda, 2007)

[Nc] captureless: 1.Nc3 e6  2.Nd5 Qe7 3.c3 Kd8 4.Qa4 Qe8 5.Ne7 Nc6 6.Qh4 Ne5
7.Nc6# (Hirokaz Onoda,  2007)

[Nd] 1.d4 Nf6 2.Bf4 Nd5 3.Bxc7 Nb4 4.Bd6 Qa5 5.Bc5 Nd3# (Francois  Labelle,
2007)

[Ne] 1.g3 Nf6 2.Bh3 Nd5 3.Bxd7+ Qxd7 4.Kf1 Qc6 5.Kg2  Ne3# (Francois
Labelle, 2007)

[Nf] 1.d3 Nf6 2.Bf4 Ne4 3.Bxc7 Nd2  4.Bd6 Qa5 5.Bc5 Nf3# (Noam D. Elkies,
May 1996)
captureless: 1.Nf3 Nc6 2.Ne5 Nd4 3.Nc4 e5 4.f4 Qf6 5.Kf2 Qb6 6.Kg1
Nf3#  (Unto Heinonen, 1996)
[Nf] captureless: 1.Nf3 d5 2.Ne5 Bf5 3.Nd7 e5 4.c3  Ne7 5.Qa4 Rg8 6.Nf6#
(Goeran Wicklund, 1996)

[Ng] 1.Nc3 e5 2.Nd5 Bb4  3.Ne7 Bc3 4.bxc3 Kf8 5.Ba3 Qe8 6.Ng6# (Francois
Labelle, 2007)
invisible: 1.d4 b5 2.d5 b4 3.d6 b3 4.dxe7 bxc2 5.exf8N cxb1B  6.Ng6 Bf5
7.Ne7 Kf8 8.Qd6 Qe8 9.Ng6# (Hirokaz Onoda, 2007)

[Nh] 1.d4  Nf6 2.d5 Nh5 3.d6 f6 4.dxe7 Kf7 5.exd8N Kg8 6.Nf7 d6 7.Qd5 Nd7
8.Nh6#  (Hirokaz Onoda, 2007)


--- Knight to the 5th rank ---

[Na]  1.Nf3 b6 2.Ne5 Ba6 3.Nxd7 Bxe2 4.Ne5 Bh5 5.Nc6 Kd7 6.Qf3 Kc8 7.Be2  Kb7
8.O-O Qc8 9.Na5# (Hirokaz Onoda, 2007)

[Nb] 1.e3 a6 2.Bxa6 Ra7  3.Bb5 Na6 4.Bxd7 Bxd7 5.d3 Be6 6.Kd2 Bxa2 7.Kc3
Bxb1 8.Kb3 Bxc2 9.Ka2 Nb4#  (Hirokaz Onoda, 2007)

[Nc] captureless: 1.d3 d6 2.Nd2 Kd7 3.Nb3 Kc6  4.Bd2 Kb5 5.c4 Ka4 6.Nc5#
(Hirokaz Onoda, 2007)

[Nd] captureless:  1.c4 e6 2.Nc3 Ba3 3.b4 Qg5 4.Bb2 Ke7 5.Qb1 Kf6 6.Nd5#
(Francois Labelle,  2007)
with promotion: 1.d4 e5 2.dxe5 Nf6 3.exf6 d6  4.fxg7 Be6 5.g8N Nd7
6.Nf6 Ke7 7.Bg5 Qe8 8.Nd5# (Hirokaz Onoda,  2007)

[Ne] captureless: 1.d3 d5 2.Bg5 Kd7 3.f4 Ke6 4.Nf3 Kf5 5.e4+ Kg4  6.Ne5#
(Francois Labelle, 2007)
with promotion: 1.e4  d5 2.exd5 Nc6 3.dxc6 e6 4.cxb7 Bd6 5.b8N Ne7
6.Nc6 Kd7 7.Bb5 Re8 8.Ne5#  (Hirokaz Onoda, 2007)

[Nf] 1.c4 e6 2.c5 Be7 3.c6 Bf6 4.cxb7 Nc6 5.bxc8N  Rb8 6.Nd6 Ke7 7.Qc2 Qe8
8.Qc5 Nd8 9.Nf5# (Hirokaz Onoda, 2007)

[Ng]  1.d3 h6 2.Bxh6 Rh7 3.Bg5 Nh6 4.Bxe7 Bxe7 5.Kd2 Bd6 6.Ke3 Bxh2 7.Kf3
Bxg1  8.Kg3 Bxf2 9.Kh2 Ng4# (Hirokaz Onoda, 2007)

[Nh] 1.d4 g6 2.d5 Bh6 3.d6  Kf8 4.dxe7 Kg7 5.e8N Kf8 6.Nf6 Kg7 7.Qd4 Qf8
8.Nh5# (Hirokaz Onoda,  2007)
without promotion: 1.Nf3 g6 2.Ne5 Bh6 3.Nxd7 Bxd2  4.Bxd2 c6 5.Nf6 Kf8
6.Bc3 Kg7 7.Qd2 Qf8 8.Nh5# (Hirokaz Onoda,  2007)


--- Knight to the 4th rank ---

[Na] 1.e4 Nc6 2.e5 Nxe5  3.Bb5 Nc4 4.Bxd7 Qxd7 5.Ke2 Qc6 6.Kd3 e5 7.Kc3 Be6
8.Kb3 Na5# (Hirokaz  Onoda, 2007)

[Nb] 1.e4 Nc6 2.Bb5 Nd4 3.Bxd7 Qxd7 4.d3 Qa4 5.Bh6 gxh6  6.Kd2 Bg7 7.Kc3 Be5
8.Nd2 Nb5# (Hirokaz Onoda, 2007)

[Nc] 1.b3 d6  2.Bb2 Nd7 3.Bxg7 Bxg7 4.f3 Be5 5.Kf2 f6 6.Ke3 Kf7 7.Ke4 Kg6
8.Kd5 c6 9.Ke6  Nc5# (Hirokaz Onoda, 2007)

[Nd] 1.e4 g6 2.Ke2 Bh6 3.Kd3 Kf8 4.Kd4 e5  5.Kxe5 Ne7 6.Kf6 d6 7.e5 Nd5#
(Hirokaz Onoda, 2007)

[Ne]  captureless: 1.d4 f6 2.Qd3 Kf7 3.Qf3 Kg6 4.Nd2 Kg5 5.g3 g6 6.Ne4#
(Francois  Labelle, 2007)

[Nf] captureless: 1.d3 f5 2.Bg5 Kf7 3.e3 Kg6 4.Ne2 Kh5  5.h4 g6 6.Nf4#
(Francois Labelle, 2007)

[Ng] 1.d4 Nf6 2.Bg5 Ne4  3.Bxe7 Qxe7 4.e3 Qh4 5.Ba6 bxa6 6.Ke2 Bb7 7.Kf3 Bd5
8.Ne2 Ng5# (Hirokaz  Onoda, 2007)

[Nh] 1.d4 Nf6 2.d5 Nxd5 3.Bg5 Nf4 4.Bxe7 Qxe7 5.Kd2 Qb4  6.Ke3 d5 7.Kf3 Bd6
8.Kg3 O-O 9.Nf3 Nh5# (Hirokaz Onoda,  2007)



--- Knight to the 3rd rank ---

[Na] 1.d3 Na6 2.Bg5  Nc5 3.Bxe7 Qxe7 4.Kd2 Qe6 5.Kc3 Qxa2 6.Kb4 d5 7.c3 Bd7
8.Qc2 Na6# (Hirokaz  Onoda, 2007)

[Nb] vacant

[Nc] 1.e3 a6 2.Bxa6 Nc6 3.Bb5 Na7  4.Bxd7 Kxd7 5.d3 Ke6 6.Kd2 Qd5 7.Kc3 Bd7
8.Kb4 Qb3 9.Ka5 Nc6# (Hirokaz  Onoda, 2007)

[Nd] (5.5, ?): PUZZLE!! 6.Nd3# (Francois Labelle,  2007)

[Ne] vacant

[Nf] captureless: 1.d3 f6 2.Qd2 Kf7 3.Qb4 Kg6  4.Nd2 Kg5 5.g4 g6 6.Ndf3#
(Francois Labelle, 2007)

[Ng] captureless:  1.d3 f5 2.Bf4 Kf7 3.e3 Kg6 4.Ne2 Kh5 5.h4 g6 6.Ng3#
(Francois Labelle,  2007)

[Nh] 1.e3 Nh6 2.Bb5 Nf5 3.Bxd7 Qxd7 4.Ke2 Qd6 5.Kf3 Qxh2 6.Kg4 e5  7.Nf3 Be7
8.Rg1 Nh6# (Hirokaz Onoda, 2007)


--- Knight to the 2nd  rank ---

[Na] 1.d3 d6 2.Kd2 Qd7 3.Kc3 Qc6 4.Kb4 Qc3 5.Kb5 Nc6 6.Be3 Bd7  7.Bxa7 Nxa7#
(Hirokaz Onoda, 2007)

[Nb] vacant

[Nc]  vacant

[Nd] vacant

[Ne] 1.d3 h6 2.Bxh6 d6 3.Bg5 Bf5 4.Bxe7 Bh7  5.Bxf8 Ne7 6.Kd2 Ng6 7.Ke3 Qg5
8.Ke4 Qg3 9.Kf5 Ne7# (Hirokaz Onoda,  2007)

[Nf] vacant

[Ng] vacant

[Nh] vacant


---  Knight to the 1st rank ---

[Na] 1.e3 a6 2.Bxa6 c5 3.Bb5 Na6 4.Ke2 Nc7  5.Kd3 c4 6.Kd4 Ra3 7.Kc5 e6 8.
Kb6 Na8# (Hirokaz Onoda, 2007)

[Nb]  1.d3 e6 2.Kd2 Ke7 3.Ke3 Kd6 4.Bd2 Kc5 5.Be1 Bd6 6.Nd2 Ne7 7.b4 Kxb4
8.Qc1  Kc3 9.Nb1# (Hirokaz Onoda, 2007)

[Nc] 1.g3 e6 2.Bg2 Ne7 3.Bxb7 Bxb7  4.d4 Bd5 5.Kd2 c6 6.Ke3 Qb6 7.Kf4 Kd8
8.Ke5 f6 9.Kd6 Nc8# (Hirokaz Onoda,  2007)

[Nd] 1.c4 d5 2.Nc3 Kd7 3.Qa4+ Kd6 4.b3 a6 5.Qxa6+ Kc5 6.Qf6 Kb4  7.Ba3+ Kxa3
8.d3 Kb2 9.Kd2 Ra3 10.Nd1# (Satoru Hayakawa, 2007)

[Ne]  1.e3 d6 2.Qf3 Kd7 3.Qc6 Ke6 4.Nf3 Kf5 5.g4 Kxg4 6.Bh3 Kxh3 7.Ke2 Kg2
8.h4  Bh3 9.Ne1# (Hirokaz Onoda, 2007)

[Nf] 1.b3 d6 2.Bb2 Nd7 3.Bxg7 Bxg7  4.f3 Be5 5.Kf2 f6 6.Ke3 Kf7 7.Ke4 Kg6
8.Kd5 c6 9.Ke6 Nf8# (Hirokaz Onoda,  2007)

[Ng] captureless: 1.e3 d6 2.Ke2 Bh3 3.Kf3 e6 4.Kf4 Ne7 5.Kg5 g6  6.Kf6 Ng8#
(Roberto Osorio, 2006)

[Nh] 1.d3 h6 2.Bxh6 f5 3.Bg5 Nh6  4.Bxe7 Nf7 5.Bh4 Be7 6.Kd2 Kf8 7.Ke3 Qe8
8.Kf4 Bd8 9.Kxf5 Rh5 10.Kg6 Nh8#  (Hirokaz Onoda,  2007)





--------------------------------


III.  Discovered Checkmates
in which the last move's Knight takes part in forming  the mating net


1.a4 c6 2.a5 Qb6 3.axb6 Kd8 4.bxa7 b6 5.axb8N Bb7  6.Rxa8 Ba6 7.Nxa6# (Noam
D. Elkies, 2002)
1.e3 Nc6 2.Ke2 Nd4 3.Kd3 c6  4.Ne2 Qa5 5.Ng3 Qd5 6.Be2 Nb5# (Andrew
Buchanan, 2002)
1.Nc3 f6 2.Nd5  Kf7 3.c3 Ke6 4.Qa4 Kd6 5.Qd4 e6 6.a4 Qe7 7.Nb4# (Andrew
Buchanan,  2002)
1.h4 f6 2.h5 Kf7 3.h6 Kg6 4.Nh3 Kh5 5.f4 g6 6.Nf2# (Noam D. Elkies,  2002)



Discovered Checkmates, by Francois Labelle (2007)
(no  condition on the mating net)

(5.5, 3): 1.e3 d5 2.Qh5 Bh3 3.Nxh3 Nd7  4.Ng5 Rb8 5.Nxf7 g5 6.Nxh8#

[no example to the 7th rank]

(5.5,  0): 1.e3 d6 2.Qf3 Kd7 3.Qf4 Kc6 4.Ne2 Kb5 5.Nd4+ Ka4 6.Nc6#
(5.5, 2): 1.e3  d5 2.Qh5 Bh3 3.Nxh3 Nd7 4.Ng5 Rb8 5.Nxf7 g5 6.Nh6#

(5.5, 2): 1.e3 d5  2.Qh5 Bh3 3.Nxh3 Na6 4.Ng5 Rb8 5.Nxf7 g5 6.Ne5#

(5.0, 0): 1.e3 d5 2.Ke2  Qd6 3.Kf3 Nd7 4.Kg4 Qg3+ 5.Kf5 Nc5#
(5.5, 0): 1.e3 d6 2.Qe2 Kd7 3.Qa6 Ke6  4.Ne2 Kd5 5.Qa5+ Kc4 6.Nd4#
(5.0, 0): 1.e3 d5 2.Ke2 Qd6 3.Kf3 Nd7 4.Kg4  Qg3+ 5.Kf5 Ne5#
(5.0, 0): 1.e3 e6 2.Ke2 Bd6 3.Kf3 Ne7 4.Kg4 h5+ 5.Kg5  Nf5#

(5.0, 0): 1.e3 d5 2.Ke2 Qd6 3.Kf3 Nd7 4.Kg4 Qg3+ 5.Kf5  Nb6#
(5.0, 0): 1.e3 e6 2.Ke2 Bd6 3.Kf3 Ne7 4.Kg4 h5+ 5.Kg5 Nec6#
(5.0,  0): 1.e3 d5 2.Ke2 Qd6 3.Kf3 Nd7 4.Kg4 Qg3+ 5.Kf5 Ndf6#
(5.0, 0): 1.e3 e6  2.Ke2 Bd6 3.Kf3 Ne7 4.Kg4 h5+ 5.Kg5 Ng6#

(5.0, 1): 1.f3 h5 2.Kf2 Nh6  3.Kg3 h4+ 4.Kxh4 f5 5.g3 Nf7#

(5.5, 0): 1.d3 f5 2.Bf4 Kf7 3.e3 Kg6  4.Ne2 Kh5 5.g3 Kg4 6.Nc1#
(5.5, 0): 1.e4 d6 2.Ba6 Kd7 3.d3 Ke6 4.Nd2 Ke5  5.Qh5+ Kf4  6.Nf1#



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