[Retros] 8th row mates by knight promotion

[Hirokaz ONODA]

Hi Mario,
 

> rnbqrN2/ppppk1Qp/3b4/4pp2/8/8/PPPP1PPP/RNB1KBNR

>  1. Pe2-e4   Pf7-f5     2. Pe4-e5   Ng8-f6     3.

> Pe5xf6   Pe7-e5    

>  4. Qd1-g4   Bf8-d6     5. Pf6-f7   Ke8-e7     6.

> Qg4xg7   Rh8-e8    

>  7. Pf7-f8=N 


This game does not belong to "Single checkmates by the
promoted piece".
I record it in the new section:
"Discovered checkmates which cannot be converted into a
double-checkmate by the change of the very last move"



> rBbq1bnr/Q1kp1ppp/n1p1p3/8/8/8/PP1PPPPP/RNB1KBNR

>  1. Pc2-c4   Pe7-e6     2. Pc4-c5   Ke8-e7     3.

> Pc5-c6   Ke7-d6    

>  4. Pc6xb7   Pc7-c6     5. Qd1-a4   Kd6-c7     6.

> Qa4xa7   Nb8-a6    

>  7. Pb7-b8=B 


The same game is already seen in the previous summary of
"Pawn to-the-8th-rank mates
(2) Double checkmates." It's my game.



> rnb1qbBr/pppp1k1Q/5p1p/8/8/8/PPP1PPPP/RNB1KBNR

>  1. Pd2-d4   Pe7-e5     2. Pd4xe5   Ng8-f6     3.

> Pe5xf6   Ph7-h6    

>  4. Pf6xg7   Pf7-f6     5. Qd1-d3   Ke8-f7     6.

> Qd3-h7   Qd8-e8    

>  7. Pg7-g8=B 


It's a double checkmate.
7. g8Q## too.


Amici Sumus,
Hiro


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