[Retros] =N double checkmates

[Hirokaz ONODA]

Hi,

 1. Pd2-d4   Pe7-e6     2. Pd4-d5   Ff8-c5     3. Pd5-d6   Cg8-e7    
 4. Pd6xc7   Pd7-d6     5. Dd1-d5   Re8-d7     6. Dd5xb7   Th8-e8    
 7. Pc7xb8=C 

 1. Ph2-h4   Pd7-d5     2. Th1-h3   Pd5-d4     3. Th3-c3   Pd4-d3    
 4. Cg1-f3   Pd3xe2     5. Pd2-d3   Dd8-d4     6. Re1-d2   Dd4xf2    
 7. Cf3-e1   Pe2xf1=C  

 1. Ph2-h4   Pd7-d6     2. Ph4-h5   Fc8-f5     3. Ph5-h6   Ff5xc2    
 4. Ph6xg7   Fc2-f5     5. Pd2-d3   Pf7-f6     6. Cb1-d2   Re8-f7    
 7. Dd1-b3   Rf7-g6     8. Db3xg8   Pe7-e6     9. Pg7xf8=C 

 1. Pc2-c3   Pe7-e6     2. Dd1-a4   Ff8-c5     3. Da4xa7   Pd7-d6    
 4. Da7xb8   Ta8-a5     5. Pa2-a4   Ta5-b5     6. Pa4-a5   Re8-d7    
 7. Pa5-a6   Rd7-c6     8. Pa6xb7   Rc6-b6     9. Ta1-a8   Pc7-c6    
10. Pb7xc8=C 

------

the latest record table of =N double checkmates
 
[bN] ---
[cN] 9.c8N# (Hirokaz Onoda, 2006)
[dN] ---
[eN] 9.e8N# (Paul Raican, 1996)
[fN] 10.f8N# (Noam D. Elkies, 2006)
[gN] ---

[baN] 7.bxa8N# (Hirokaz Onoda, 2006)
[abN] 11...axb1N# (Hirokaz Onoda, 2007)
[cbN] 7.cxb8N# (Hirokaz Onoda, 2007)
[bcN] 10.bxc8N# (Hirokaz Onoda, 2007)
[dcN] 7...dxc1N# (Olli Heimo, 2006)
[cdN] --- 
[edN] 7.exd8N# (Joerg Varnholt 1996)
[deN] 10.dxe8N# (Hirokaz Onoda, 2006)
[feN] ---
[efN] 7...exf1N# (Hirokaz Onoda, 2007)
[gfN] 9.gxf8N# (Hirokaz Onoda, 2007)
[fgN] ---
[hgN] 9...hxg1N# (Hirokaz Onoda, 2007)
[ghN] 8.gxh8N# (Olli Heimo 1996)


1.d4 e6 2.d5 Qf6 3.d6 Ne7 4.dxc7 d5 5.Qxd5 Bd7 6.Qxb7 Nd5 7.Bd2 Ke7 8.Ba5
Be8 9.c8N# (Hirokaz Onoda, 2006)
1.d4 g6 2.d5 Bg7 3.d6 Kf8 4.Qd5 Bd4 5.Bg5 Kg7 6.Bxe7 Qf8 7.Bd8 Ne7 8.dxe7
Kf6 9.e8N# (Paul Raican, 1996)
1.d4 f6 2.d5 Kf7 3.d6 Kg6 4.de d5 5.e4 Bf5 6.e5 Nd7 7.ef6 Rb8 8.f7 Ngf6
9.e8=Q Bc5 10.f8N# (Noam D. Elkies, 2006)
 
1.c4 e6 2.c5 Ke7 3.c6 Kd6 4.cxb7 c6 5.Qa4 Kc7 6.Qxa7 Bd6 7.bxa8N# (Hirokaz
Onoda, 2006)
1.a4 b5 2.Ra3 bxa4 3.Rb3 a3 4.Rb6 cxb6 5.c3 Qc7 6.Qa4 Qc4 7.Kd1 Qa2 8.Kc2
Qa1 9.Kb3 a2 10.Ka3 a5 11.Qb3 axb1N# (Hirokaz Onoda, 2007)
1.d4 e6 2.d5 Bc5 3.d6 Ne7 4.dxc7 d6 5.Qd5 Kd7 6.Qxb7 Re8 7.cxb8N# (Hirokaz
Onoda, 2007)
1.c3 e6 2.Qa4 Bc5 3.Qxa7 d6 4.Qxb8 Ra5 5.a4 Rb5 6.a5 Kd7 7.a6 Kc6 8.axb7
Kb6 9.Ra8 c6 10.bxc8N# (Hirokaz Onoda, 2007)
1.e3 d5 2.Bc4 dxc4 3.Nf3 Qd3 4.Rf1 Qxc2 5.Ke2 c3 6.Qe1 cxd2 7.Nc3 dxc1N#
(Olli Heimo, 2006)
1.d4 b5 2.d5 Bb7 3.d6 Be4 4.dxe7 Bg6 5.e4 f6 6.Qxd7+ Kf7 7.exd8N# (Joerg
Varnholt 1996)
1.e4 c6 2.e5 Qb6 3.e6 Kd8 4.exd7 e6 5.a3 Bxa3 6.Qf3 Ne7 7.Qxa3 Ng6 8.Qe7
Kc7 9.Ra6 Re8 10.dxe8N# (Hirokaz Onoda, 2006)
1.h4 d5 2.Rh3 d4 3.Rc3 d3 4.Nf3 dxe2 5.d3 Qd4 6.Kd2 Qxf2 7.Ne1 exf1N#
(Hirokaz Onoda, 2007)
1.h4 d6 2.h5 Bf5 3.h6 Bxc2 4.hxg7 Bf5 5.d3 f6 6.Nd2 Kf7 7.Qb3 Kg6 8.Qxg8 e6
9.gxf8N# (Hirokaz Onoda, 2007)
1.h4 g5 2.Rh3 gxh4 3.Rc3 h3 4.Rxc7 Qxc7 5.f3 Qh2 6.Kf2 Qh1 7.Kg3 h2 8.Kh3
h5 9.g3 hxg1N# (Hirokaz Onoda, 2007)
1.h4 d5 2.h5 d4 3.h6 Qd5 4.hxg7 Qxg2 5.Rxh7 Qh1 6.Bh3 f6 7.Bd7+ Kf7
8.gxh8N# (Olli Heimo 1996)


Amici Sumus,
Hiro


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