[Retros] Shortest Knight Checkmates

Hirokaz ONODA glkoon at yahoo.co.jp
Sat Aug 18 15:20:05 EDT 2007


I received a game from Satoru Hayakawa, who is a fellow running member of
the Japan Correspondence Chess Assocciation.
1. Pc2-c4 Pd7-d5 2. Cb1-c3 Re8-d7 3. Dd1-a4 Rd7-d6
4. Pb2-b3 Pa7-a6 5. Da4xa6 Rd6-c5 6. Da6-f6 Rc5-b4
7. Fc1-a3 Rb4xa3 8. Pd2-d3 Ra3-b2 9. Re1-d2 Ta8-a3
10. Cc3-d1
double checkmate

and this is mine.
1. Pe2-e3 Pd7-d6 2. Dd1-f3 Re8-d7 3. Df3-c6 Rd7-e6
4. Cg1-f3 Re6-f5 5. Pg2-g4 Rf5xg4 6. Ff1-h3 Rg4xh3
7. Re1-e2 Rh3-g2 8. Ph2-h4 Fc8-h3 9. Cf3-e1
double checkmate

With these games, the vacant rooms are filled.

"Knight to the 1st rank" double checkmates:

[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)

Amici Sumus,

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