[Retros] 8th row mates by knight promotion

[Hirokaz ONODA]

Hi Olli,


> dxc:

> rsb1kbsr/ppp1pppp/8/8/8/2S1PS2/PPq1KPPP/R1s1QR2

> 14 single moves.	12 + 16

> 1.Pe2-e3   Pd7-d5   2.Bf1-c4   Pd5xc4   3.Sg1-f3  

> Qd8-d3   

> 4.Rh1-f1   Qd3xc2   5.Ke1-e2   Pc4-c3   6.Qd1-e1  

> Pc3xd2   

> 7.Sb1-c3   Pd2xc1=S


It's not a single checkmate, but a double checkmate.
Fortunately, 7...d1B or 7...d1Q is also a double
checkmate.
I record them(7...d1B/Q##) as yours.

Hiro


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