# [Retros] Hit Team theme progress

Noam Elkies elkies at math.harvard.edu
Wed Aug 30 14:47:56 EDT 2017

```Roberto osorio <osorio.arg at gmail.com> wrote:

> I think that Andrew is referring to the "Total Home Circuit" feature.
> This means that all the white "entities" are on their starting position.
> The abstract concept is that after promotion, the "entity" is transformed,
> but it continues to be the same entity (piece).

> The first example was,

> 1. Sc3 h5 2. Sd5 Th6 3. Sxe7 Tf6 4. Sd5 Sh6 5. Sc3 Ke7 6. g4 Ke6 7. g5 Kf5
> 8. g6 Kg4 9. gxf7 g6 10. Sf3 Lg7 11. f8=S Lh8 12. Se6 Dg8 13. Sf4 Tf8 14.
> Sg2 Kh3 15. Sb1 Sg4 16. Sg1#

So, the challenge is to construct a proof game with this feature
ending in a pure mate (unlike the above "first example" where
g3 is guarded twice)?  This works, then (C+ Popeye 3.41 in ~5.5 seconds):

https://www.janko.at/Retros/d.php?ff=2r2n2/2p1pr2/3pbkpn/5pb1/1p6/8/PQPPPPNP/RNBQKBNR
SPG-16.5

Solution below.  Andrew -- does this accomplish the task you had in mind?

NDE

1 g4 f5  2 g5 Kf7  3 g6+ Kf6  4 gxh7 g6  5 b4 Bh6  6 b5 Bg5  7 b6 Nh6
8 b6xa7 Rf8  9 h8=N d6  10 Nf7 Nd7  11 Nxd8 Rf7  12 Ne6 Nf8  13 Nf4 Be6
14 Ng2 Rc8  15 a8=Q b5  16 Qa3 b4  17 Qb2#
```