[Retros] Shortest Knight Checkmates [record list]

[Hirokaz ONODA]

Hi,


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.Nc3 Nf6 2.Nd5 Ne4 3.Nxe7 Nc3 4.Ng8 Bb4 5.d3 Qe7 6.Kd2 Nb1# (Michel
Caillaud, 2007)

[Nc] 1.e4 e5 2.Qe2 Qg5 3.Qa6 Qxd2+ 4.Nxd2 Bc5 5.Nc4 Ke7 6.Nb6 Kd6 7.Nxc8#
(Michel Caillaud, 2007)

[Nd] 1.d4 Nf6 2.d5 Nxd5 3.Bg5 Ne3 4.Bxe7 Qxe7 5.f3 Qc5 6.Kf2 Bd6 7.Qe1 Nd1#
(Michel Caillaud, 2007)

[Ne] 1.Nf3 g6 2.Ne5 Bg7 3.Nxd7 Bc3 4.Nf6+ Kf8 5.dxc3 Kg7 6.Qd4 Qf8 7.Ne8#
(Michel Caillaud, 2007)

[Nf] 1.d4 Na6 2.Qd3 Nc5 3.Qxh7 Ne4 4.Bf4 Ng3 5.Qe4 Rh3 6.Kd2 Nh6 7.Ke3
Nxf1# (Michel Caillaud, 2007)

[Ng] 1.Nf3 Nc6 2.Ne5 Nd4 3.Nxd7 Bxd7 4.e3 Nf3+ 5.Ke2 Bg4 6.Qe1 Ng1# (Michel
Caillaud, 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.e4 c5 2.Ba6 Nxa6 3.d3 Nb4 4.Bf4 Qa5 5.Bb8 d6 6.Kd2 Be6 7.Kc3 Nxa2#
(Michel Caillaud, 2007)

[Nb] 1.e3 e5 2.Qg4 Bb4 3.Qxd7+ Nxd7 4.Kd1 Nc5 5.d3 Nxd3 6.Ne2 Nxb2# (Michel
Caillaud, 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 b6 2.Bb5 Ba6 3.Bxd7+ Nxd7 4.Qe2 Ne5 5.Kf1 Nc4 6.Qe1 Nxd2# (Michel
Caillaud, 2007)

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

[Nf] 1.e3 e5 2.Qg4 Bb4 3.Qxd7+ Nxd7 4.Kd1 Nc5 5.d3 Nxd3 6.Ne2 Nxf2# (Michel
Caillaud, 2007)

[Ng] 1.e4 h5 2.Qxh5 e6 3.Qe5 Rh3 4.Nxh3 g5 5.Nf4 g4 6.Nxe6 g3 7.Ng7#
(Michel Caillaud, 2007)
     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 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)

[Ne] captureless: 1.d3 d5 2.Bg5 Kd7 3.f4 Ke6 4.Nf3 Kf5 5.e4+ Kg4 6.Ne5#
(Francois Labelle, 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.d4 Nf6 2.d5 Nxd5 3.Bg5 Ne3 4.Bxe7 Qxe7 5.f3 Qc5 6.Kf2 Bd6 7.Qe1 Ng4#
(Michel Caillaud, 2007)

[Nh] 1.Nf3 g6 2.Ne5 Bg7 3.Nxd7 Bc3 4.Nf6+ Kf8 5.dxc3 Kg7 6.Qd4 Qf8 7.Nh5#
(Michel Caillaud, 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)


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