[Retros] Another improvement (7 gxh8N#)

[Noam Elkies]

Nicolas Dupont <Nicolas.Dupont at math.univ-lille1.fr> writes:


>> 1.h4 e6 2.h5 Ba3 3.h6 Bxb2 4.hxg7 Bxc1 5.Qxc1 Ke7 6.Kd1

>> Kf6 7.Qb2 Kg6 8.Qe5 Qe7 9.gxh8N# (Hirokaz Onoda)



> 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 think that Andrew will appreciate it, as based on one of its ideas

> (although performed on a different way).


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#

(C+ Popeye, 20 milliseconds); 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#

(C+ Popeye, 140 milliseconds).

NDE