[Retros] Pawn to-the-8th-rank mates

andrew buchanan andrew at anselan.com
Wed Dec 13 04:35:08 EST 2006

Hi Hiro,

That's great: thank you.

One nit: the last one on your list here, gxfQ PG in 4.5. Didn't Noam
Elkies already do that task in 2002 with:

1.f4 c6 2.f5 Qc7 3.f6 Kd8 4.fxg7 f6 5.gxf8Q#

Admittedly, this one also works with R, but it's still an answer to the
Q task, isn't it?


--- Hirokaz ONODA <glkoon at yahoo.co.jp> wrote:

> Hi,


> I add the following part to the list.



> (1-4') Queening is MUST(underpromotion is insufficient)


> 1.c4 d5 2.c5 Qd6 3.cxd6 Bd7 4.dxc7 Bc6 5.c8Q# (Andrew

> Buchanan)

> 1.d4 b5 2.Qd3 b4 3.Qa3 b3 4.Bd2 bxc2 5.Bc3 c1Q# (Norbert

> Geissler 1996)

> 1.e3 d5 2.Bc4 dxc4 3.Qf3 c3 4.Ke2 cxd2 5.c3 d1Q# (Andrew

> Buchanan)

> 1.e3 g5 2.Bd3 g4 3.Be4 g3 4.Qg4 gxf2 5.Kd1 f1Q# (Andrew

> Buchanan)

> 1.g4 e6 2.g5 Ba3 3.g6 Bxb2 4.Bxb2 Qg5 5.gxf7 Kd8 6.f8Q#

> (Hirokaz Onoda)

> 1.a4 c6 2.a5 Qc7 3.a6 Qf4 4.axb7 d6 5.bxc8Q# (Noam D.

> Elkies 2002)

> 1.e4 e6 2.e5 Bd6 3.exd6 Kf8 4.dxc7 d6 5.cxd8Q# (Gianni

> Donati 1996)

> 1.d3 e5 2.Bg5 e4 3.Kd2 e3 4.Kc1 exf2 5.Qe1 fxe1Q# (Andrew

> Buchanan)

> 1.h4 e6 2.h5 Qh4 3.h6 Kd8 4.hxg7 h6 5.gxf8Q# (Hirokaz

> Onoda)



> Amici Sumus,

> Hiro



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