Die Schwalbe

1 problem(s) found in 2266 milliseconds (displaying 1 problem(s)). [PROBID='P0008936'] [download as LaTeX]

1 - P0008936
Henrik Juel
3218 Probleemblad 05/1997
P0008936
(11+10)
Ergänze einen mattsetzenden Läufer!

Expanding on the author's explanation.
All 16 pawns promoted to bishops. There was a *first* pawn capture from each of the 8 files. There were also 2 additional pawn captures. Cases:
- If the 8 pawn captures were distributed 4+4 between Wh and Bl, then the number of light bishops promoted was even, and must have been 6&6 light so that the two later captures nudged a Wh pawn dark to light, and a Bl pawn light to dark.
- If the 8 pawn captures were distributed 5+3 between Wh and Bl, then the number of light bishops promoted was odd, and must have been 5&5 light so that the two later captures both nudged Wh pawns dark to light.
- If the 8 pawn captures were distributed 3+5 between Wh and Bl, then the number of light bishops promoted was odd, and must have been 7&7 light so that the two later captures both nudged Bl pawns light to dark.
In none of these three cases was a bP nudged from dark to light. Therefore the last move could not have been gxh1=L or gxf1=L, so can't add Bl bishop on h1.
Since both nudges were nonetheless used for pawn captures, we can't add the mating unit on g2,e2,g4,e4 or c6.
Henrik Juel: Add bBd5. Not on e4, g2, or h1, because all captures were made by P's and the 2 extra captures (besides the 8 captures necessary to promote all P's) decreased the number of lightsquared bB's to achieve the square color imbalance of 8 lwB's and 6 lbB's. (2003-10-13)
comment
Keywords: Add pieces, Non-standard material, Aristocrat
Genre: Retro
FEN: b3B3/1k1B3B/7b/1B3b1B/B6b/3b1K1b/7B/1BbBbbB1
Reprints: Thema Danicum 94 1999
Input: Gerd Wilts, 1998-06-26
Last update: A.Buchanan, 2021-03-07 more...
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Gerd Wilts (1)