[Retros] Eric's off-topic idea

[Noam Elkies]

Nicolas Dupont <Nicolas.Dupont at univ-lille1.fr> wrote:


> Btw, Jonathan's pj is not exact, as eg 3.Nf3 and 4.c4 can be

> interverted.


I guess "pj" = "partie justificative" (so the near-coincidence with
PG = proof game is coincidental).  I don't think AJM was trying for
a uniquely reconstructible game, only a demonstration that promotion
can happen in a legal game with all pawns (Pawns?) royal, which already
requires some thought.


> If we adopt the conventions that kings and pawns (and

> only pawns, not promoted units) are royal, here is a new try:



> 1.d3 e6

> 2.Bg5 Be7

> 3.Bf6+ gxf6

> 4.h4 f5+

> 5.h5 Nf6+

> 6.h6 Nh5

> 7.Nh3 Ng7


I don't think this is quite "exact" either, e.g.
3 h4 Nh6 4 h5 Nf5 5 Bf6 gxf6 6 Nh3 Ng7+ 7 h6 f5.
Thus also 1 h4 e6+ 2 h5 etc.


> 8.hxg7 h5

> 9.g8=N Kf8 (g8=B would give check to Pf7)


neat idea, though.


> 10.d4 Kxg8


If Kings are not royal then maybe this attempt at a (S)PG11.0 works:
http://www.janko.at/Retros/d.php?ff=rnb4n/pppprp1p/3bpp2/3R4/8/1P6/P1PPPPP1/RN1QKBN1

NDE

1 b3 e6 2 Bb2+ Qf6+ 3 Bxf6 gxf6 4 h4 Bd6 5 h5 Ne7 6 h6 0-0 7 Rh5 Re8
(7...Kg7+? 8 hxg7#) 8 Rd5 Kg7+ 9 hxg7 Ng6 10 g8R! (g8Q#?) Re7 11 Rh8+ Nxh8