[Retros] Another improvement (7 gxh8N#)

[Nicolas.Dupont at math.univ-lille1.fr]

> N.Dupont wrote:

>

>>>> 1.Ph2-h4  Pf7-f5  2.Ph4-h5  Re8-f7  3.Ph5-h6  Dd8-e8  4.Ph6xg7  Ph7-h5

>>>> 5.Th1-h3  Ph5-h4  6.Th3-g3  Ph4-h3  7.Tg3-g6  Ph3-h2  8.Pg7xh8=C

>

> I answered:

>

>>> This can be done in 6.5 rather than 7.5, e.g.

>

>>>   1 h4 d6  2 h5 Bf5  3 h6 Be4  4 hxg7 f5  5 Rh6 Kf7  6 Rg6 Qe8  7

>>> gxh8=N#

>

>>>  likewise in 7.0 with Black checkmating:

>

>>>   1 d3 h5  2 Bf4 h4  3 Be5 h3  4 f4 hxg2  5 h3 Rxh3  6 Kf2 Rg3  7 Qe1

>>> gxh1=S#

>

> N.D. replies:

>

>> Well done!  Joint works by ND and NE ?

>

> Thank you.  Yes, clearly a joint work, though maybe Andrew Buchanan

> is a co-author too -- you described your 7.5 move game as based on

> one of his ideas, but I don't know how close a predecessor it is.


I don't know either, thus letting Andrew to decide to come or not on those
entries. Its idea is to present a rook  protected by the final promotion
and guarding a lot of possible king escapes.