Die Schwalbe

11 problem(s) found in 4190 milliseconds (displaying 11 problem(s)). [COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND NOT K='Umnow' AND K='Einfärbeproblem'] [download as LaTeX]

1 - P0000108
Andrey Frolkin
6272 Die Schwalbe 111 06/1988
1. Lob
P0000108
(30+0) C+
Färbe die Steine!
BP in 19.0
1. h4 d6 2. Th3 Sd7 3. Tb3 Sdf6 4. Tb6 axb6 5. f4 Ta3 6. Kf2 Th3 7. a4 Th1 8. Ta3 Lh3 9. Tg3 Dd7 10. Tg6 hxg6 11. a5 Th5 12. a6 Ta5 13. h5 Ta1 14. h6 Da4 15. h7 b5 16. h8=T Sh7 17. a7 f6 18. a8=T+ Kf7 19. Ta7 Dd4+
play all play one stop play next play all
Henrik Juel: C+ by Natch 3.1 (16 min.)
The colored position has black Ta1,h1 and Pb5,g6, and white Ta7,h8, otherwise 'natural' (2018-12-07)
François Labelle: Henrik, did you really test all 2^30 possible colorings with Natch, or did you use human deductions to reduce the possibilities (making this HC+), or did you only test the intended coloring (making this a partial C+)? (2018-12-09)
Mario Richter: I do not think that it is necessary to check all 2^30 colorings, since the color of the pawns on files c,d,e and f is completely determined. This and more restrictions on the set of potentially possible colorings may be derived from insights presented in an article "Aggregierte Schlagbilanz" by Frolkin & Kornilov, feenschach 130, p.411ff. Since the mechanisms presented there can at least partially be implemented in a little computer program, even a "full C+" label for this problem is not out of reach ... (2018-12-10)
Henrik Juel: I only tested the intended coloring, Francois,
so the C+ label is not justifiable
In the other coloring proof games I write something like
The colored position was C+ by Natch

Mario is right, of course, in that not all colorings need testing; but still the number is very large
This genre is somewhat messy; at first I thought that the solver could determine the coloring, but this is clearly not the case; also, the intention is not
'color the men such that a correct proof game in 19 results' (2018-12-11)
A.Buchanan: Henrik: so what exactly should the stipulation be for clarity? (2018-12-12)
Henrik Juel: Pretty much as it is now, Andrew
Color the men
PG19 (2021-02-20)
comment
Keywords: Unique Proof Game, Colouring problem, Promotion (TT), Phoenix
Genre: Retro
Computer test: Natch 3.1 (16 min.)
FEN: 5BNR/RPP1PKPN/3P1PP1/1P6/3Q1P2/7B/1PPPPKP1/RNBQ1BNR
Reprints: 158 Shortest Proof Games 11/1991
Input: Gerd Wilts, 1995-06-03
Last update: James Malcom, 2022-02-08 more...
2 - P0000111
Andrey Frolkin
Leonid Lyubashevsky

6330 Die Schwalbe 112 08/1988
4. ehrende Erwähnung
P0000111
(28+0)
Färbe die Steine!
BP in 11.0
1. h4 f5 2. Th3 Kf7 3. Tb3 De8 4. Tb6 axb6 5. g3 Ta3 6. Lg2 Tc3 7. Lc6 dxc6 8. dxc3 Le6 9. Dd8 Lb3 10. axb3 Dd7 11. Ta8 Dd1+
play all play one stop play next play all
Henrik Juel: C+ by Natch 3.1
The colored position is 'natural' except for wTa8, wDd8, and sDd1 (2018-12-07)
paul: The problem is Jacobi+ with this code: stipulation PG 11 forsyth RS1Q1BSR/1PP1PKPP/1PP5/5P2/7P/1PP3P1/1PP1PP2/1SBQK1S1 ColorThePieces (2021-07-06)
comment
Keywords: Unique Proof Game, Colouring problem, Interchange
Genre: Retro
FEN: RN1Q1BNR/1PP1PKPP/1PP5/5P2/7P/1PP3P1/1PP1PP2/1NBQK1N1
Input: Gerd Wilts, 1995-06-03
Last update: James Malcom, 2022-02-08 more...
3 - P0000604
Andrej N. Kornilow
3948 Die Schwalbe 75 06/1982
7. Lob
P0000604
(24+0)
Färbe die Steine!
Welches waren die letzten 11 Einzelzüge?
James Malcom: Solution? (2020-11-07)
Mario Richter: I do not know the official solution, but the following works:
wLf8 wBe7 wBg6 wBh6 wLh5 wBe4 wTf4 wKg4 wDh4 wSf3 wDg3 wLh3 wSf2 wBg2 wSh2
sBb7 sBc7 sTf7 sBh7 sBd6 sBe6 sKf6 sBe5 sBa3
R: 1. f5xg6ep g7-g5 2. Sg5-f3 a4-a3 3. Kf3-g4 a5-a4 4. Tg4-f4 a6-a5 5. f4-f5 Kf5-f6
6. e3-e4
wCaps: f5xg6ep d7xTe8=L c6xLd7 d6xDe7 b6xLa7 a5xSb6 b6xSa7
wProms: d7xTe8=L a7-a8=S a7-a8=D
sCaps: f6xTe5 (2020-11-10)
comment
Keywords: Colouring problem, En passant, Last Moves? (11)
Genre: Retro
FEN: 5B2/1PP1PR1P/3PPKPP/4P2B/4PRKQ/P4NQB/5NPN/8
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-06-03 more...
4 - P0001785
Andrey Frolkin
Andrej N. Kornilow

1 Rex Multiplex 27 08/1989
P0001785
(16+0)
Färbe die Steine!
Welches war der letzte Zug?
Schwarz am Zug
a) R: 1. Kh4-h3
play all play one stop play next play all
Henrik Juel: Last move is determined only if it is known to be white. (2003-11-20)
more ...
comment
Keywords: Colouring problem, Kindergarten Problem, Last Move? (K-), Type B, Economy record (Last Move? Type B Co)
Genre: Retro
FEN: 8/8/7K/6PP/4PPP1/3PPPPK/3PPPPP/8
Reprints: (A) feenschach 130 10-12/1998
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-06-13 more...
5 - P0002758
Andrej N. Kornilow
1078 Phénix 15-16 12/1991
P0002758
(25+0)
Färbe die Steine! Welches waren die letzten 9 Einzelzüge?
James Malcom: Solution? (2020-11-07)
Mario Richter: I do not know the official solution, but the following works:
wBb7 wBf7 wBb6 wBg6 wBc5 wTf5 wLf4 wBg4 wBe3 wKg3 wTh3 wDf2 wBh2 wSf1 wSh1
sLg8 sDh8 sBa7 sBc7 sBh7 sBe6 sBf6 sKh6 sBe5 sLg1
wCaps: h5xg6ep f3xTg4 g4xTh5 e6xSf7 d5xSe6 a4xBb5
sCaps: d7xLe6
R: 1. h5xg6ep g7-g5 2. Tg5-f5 d7xLe6 3. f3xTg4 Th4-g4 4. g4xTh5 Kg6-h6 5. Tf5-g5 (2020-11-10)
comment
Keywords: Colouring problem, Last Moves? (9), En passant
Genre: Retro
FEN: 6BQ/PPP2P1P/1P2PPPK/2P1PR2/5BP1/4P1KR/5Q1P/5NBN
Reprints: (34) Die Schwalbe 144 12/1993
Input: Gerd Wilts, 1995-06-03
6 - P0005813
Fedir Kapustin
anonymous

? 1981
P0005813
(18+0)
#2
Färbe die Steine!
Henrik Juel: Black: Ke8, Rh8, Sh1, Pf7,g6,h6 (12+16). 1.000. bSh1 is promoted after 3 captures; wRh7 came from h1 via row 8, ruining Black's castling. (2003-11-17)
Henrik Juel: Fedir had an anonymous co-author?? (2021-10-31)
Henrik Juel: How are the castlings mutually exclusive? (2021-10-31)
comment
Keywords: Colouring problem, Castling, mutual exclusive
Genre: Retro
FEN: B3K2R/1N3P1R/1P3PPP/8/8/6P1/2P1PPP1/R3K2N
Reprints: (43) Die Schwalbe 144 12/1993
Input: Gerd Wilts, 1995-06-07
Last update: A.Buchanan, 2021-10-31 more...
7 - P0006899
Gideon Husserl
Israel Ring Tourney 1966-1971
Preis
P0006899
(9+0)
Färbe die Steine!
Welches war der letzte Zug?
sKc8,sBb7

R: 1. c7xSd8=T++
play all play one stop play next play all
Henrik Juel: Black: Kc8, Pb7 (7+2). -1.R=c7:S. Duplicated by P0007375 (2003-11-17)
Alain Brobecker: P1397480 is inspired by this one! (2021-12-25)
comment
Keywords: Colouring problem, Last Move?
Genre: Retro
Computer test: rawbats
FEN: B1KRN3/PP6/2QK1R2/8/8/8/8/8
Reprints: feenschach 21, p. 255, 04/1974
(C) feenschach 39 07-10/1977
Input: Gerd Wilts, 1996-08-11
Last update: A.Buchanan, 2023-06-06 more...
8 - P1067883
Alain Brobecker
Messigny 05/2005
P1067883
(8+0) C+
Färbe die Steine!
sKa6, sTc6

R: 1. a5xb6ep+ b7-b5 2. Tb5-d5+,Tb5xd5+
play all play one stop play next play all
The Qa4 and the Bc4 attacks both Kings, so those two pieces have the same color and there was a discovered check. The only possible discovered check is a5xb6+ en passant, so Kb3, Qa4, Bc4 and Pb6 are white while Ka6 is black.
To have the en passant capture, black must have played b7-b5 and we deduce from it that Rc6 is black.
Before black has played b7-b5, the BKa6 was attacked by the WBc4, or it can not have moved, so there was a discovered check of this WBc4, and the only possible discovered check is with Rd5 which is then white.
Last two single moves are: n.a5xb6+ e.p. and n-1... b7-b5
Henrik Juel: The solution text is full of file errors
The retroplay is 1.a5xb6ep+ b7-b5 and e.g. 2.Tb5-d5+ (2021-12-24)
comment
Keywords: Colouring problem, Minimal
Genre: Retro
Computer test: rawbats
FEN: 8/8/KPR5/3R4/Q1B5/1K1R4/8/8
Input: Gerd Wilts, 2005-05-17
Last update: Mario Richter, 2021-12-25 more...
9 - P1384539
Henrik Juel
Thema Danicum 2004
Spezialpreis
P1384539
(18+0)
Färbe die Steine
a) White Kf3, Pd3,d5,d7,e4,e7,f5,g2,h3 Black Ka3, Pb2,e2,e3,e5,e6,f7,g7,h5
play all play one stop play next play all

Duplicate Diagram: P1017583

Henrik Juel: Solution
All 8+8 pawns are on the board, and it is easy to count the east-bound pawn captures needed to give the diagram configuration
The a-file is pawnless, axb happened twice, bxc happened 2+2-1 = 3 times, cxd happened 3+2-0 = 5 times, and dxe happened 5+2-3 = 4 times, for a total of 14 needed captures; this number equals the number of missing officers, 7+7, so all captures were pawn captures, namely the ones just enumerated
This means that the pawns on the f,g,h-files never captured, so Pf5,g2,h3 are white and Pf7,g7,h5 are black
A sKf3 would stand in impossible check from wPg2, so Kf3 is white, and Ka3 and Pb2 are black
A sPe4 would give impossible check to wKf3, so Pe4 is white
[Lf1,Lf8] were not captured at home, so Pe2 is black and Pe7 is white
Now we have two white pawns on the e-file, so the white capture dxe happened at least once; this leaves at most six captures for the remaining three white pawns, and to reach the diagram configuration we need all these six captures, namely axbxcd, bxcxd, and cxd
This means that Pd3,d5,d7 are white and Pe3,e5,e6 are black, concluding the coloring
It is easy to verify that this coloring is a legal position; the only pitfalls in constructing a proof game are on the e-file, where Pe4 must be [wPe2] and Pe5 or Pe6 must be [sPe7] to ensure that the black e-pawn stands above the white one (2020-12-31)
Henrik Juel: The colored position is
White Kf3, Pd3,d5,d7,e4,e7,f5,g2,h3
Black Ka3, Pb2,e2,e3,e5,e6,f7,g7,h5 (2020-12-31)
comment
Keywords: Colouring problem, Aristocrat, Miniature, Kindergarten Problem
Genre: Retro
FEN: 8/3PPPP1/4P3/3PPP1P/4P3/K2PPK1P/1P2P1P1/8
Input: fs/hg, 2020-12-30
Last update: A.Buchanan, 2023-06-03 more...
10 - P1384750
Andrej N. Kornilow
StrateGems 2001
Spezialpreis
Volet 50 JT
P1384750
(24+0)
Färbe die Steine
a) R: 1. 0-0-0 e6xSd5
play all play one stop play next play all
Henrik Juel: diagram error: 3 kings (2023-05-22)
A.Buchanan: I think it’s meant to be Da7 (2023-05-23)
A.Buchanan: Assuming Qa7, 16 pawns require 8 captures to shuffle left, which exhausts all missing pieces. Rd1 is delivering check, and since it didn’t capture, it must have just castled. So wPc2d2e2f2. To explain Ba8, must be wPb7. So wPa2b3 bPa6b5. wPb7 is Volet pawn and given that both light-squared bishops remain, at most one more capture by White is possible. Either e7 or g7 must be White, to have released bBf8, so it can only be wPg7. So all pawns are known. Other pieces are all white except Ba8 or Bc6. If Bc6 were White then Black’s prior move exNd5 does not give White a move because of illegal check from Bc6. So Ba8 is White, Bc6 is Black. (2023-05-23)
Henrik Juel: Good analysis, Andrew
So with Da7 the coloring is
Black: Kh1 Lc6 Pa6,b5,c7,d5,d7,e7,g6,h2 (10)
White: the rest (14)
White captured h6xLg7 and g2xf3xe4xd5xc6xb7
Black captured f7xSe6xSd5
The retroplay is R: 1.0-0-0+ e6xSd5 etc. (2023-05-23)
A.Buchanan: As is often the case, when one fixes a PDB diagram error, one finds that the correct problem already existed in PDB. I deleted it, since it contained no detailed solution. (2023-05-23)
comment
Keywords: Colouring problem, Volet Pawn, Castling
Genre: Retro
FEN: BB6/QPPPP1P1/PRB3P1/1P1P4/8/1P6/P1PPPP1P/2KR3K
Input: fs/hg, 2020-12-30
Last update: A.Buchanan, 2023-06-03 more...
11 - P1394799
Alain Brobecker
JM1 Phénix 223 12/2012
Mémorial Jean-Michel Trillon
2nd honorable mention
P1394799
(24+0)
Colour the pieces.
Bichromatic chess.
(The start and end squares of every move must be of different colours)
b) R: 1. d7-d8=S# c2-c1=L
play all play one stop play next play all
Some notes on Bichromatic chess: Bishops cannot move. Castlings are forbidden. Queens are Rooks with
a different shape (!?). Pawns cannot capture neither make double steps, thus they cannot change column
and there is at most one promotion per file (and both Pawns must be absent).
Nd8 attacks both K and has no square to come from, so thge last move is n.d7-d8=N+, thus WNd8.
The Ps have the natural colour, ie WPa4, WPb2, WPe2, WPf2, WPg2, WPh4 and BPa6, BPb6, BPe6,
BPf7, BPg7, BPh7. We can deduce BBf8 since there was no promotion on this column. But then the
BRh8 was not able to go out and has been captured in its homecage.
Moreover, if there was a promotion on the c-file it’s a promotion to B since there is at most one promotion
per file and the extremities are occupied by Bs. Thus there as been no promotion to R (or Q) during
the game, so there remains 1 BR and 2 WRs, and we can deduce the colours of the Ks and of the pieces
touching them: BRb8, BKb7, BQa7, WKc6, WRd6, WRc5, WNe7. We deduce also WQa8.
If WBc8 then it has been promoted, then WBc1 (one promotion per file) but then black is retro-stalemate
before n.d7-d8=N#. Thus our hypothesis is wrong and we have BBc8.
If WBc1 then black is retro-stalemate before n.d7-d8=N+, so we have BBc1 and the last black move is
n-1... c2-c1=B.
(This was the small idea of this problem, a light trap with a promoted Bishop).
Henrik Juel: The only problem with these two keywords in the PDB, so far
Interesting problem (2021-10-22)
A.Buchanan: Very fun. How about home-and-away-base? I can find a position where the "orthodox" homebase colouring doesn't work, but I can't make the solution quite unique. (2021-10-23)
A.Buchanan: Alain do you have further publication details please? (2021-10-23)
Mario Richter: Alain will surely know better, but according to my archives the wanted details are:
2° Mention d’Honneur : Alain BROBECKER (JM1, Phénix 223 décembre 2012)

The problem is not difficult, but it nicely shows the subtleties of the "Bichromatic chess" condition. Besides the "light trap with a promoted Bishop" there's also a second trap: wKb7, black rooks d6 and c5, which fails only because bRh8 "has been captured in its homecage" (a fact that can be easily overlooked.) (2021-10-23)
A.Buchanan: This problem was featured in yesterday's Monthly International Zoom Call, and was a great success, with both traps being fallen into :) (2021-10-24)
A.Buchanan: In a colouring problem, non-standard material would equate to 3+ queens or bishops on a certain colour square, or 5+ rooks or knights (2021-10-24)
comment
Keywords: Colouring problem, Bichrome Chess, Promotion (Sl), Last Moves? (2)
Genre: Retro, Fairies
FEN: QRBN1B2/QK2NPPP/PPKRP3/2R5/P7/8/1P2PPPP/2B5
Input: Alain Brobecker, 2021-10-22
Last update: Alain Brobecker, 2021-12-24 more...
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The problems of this query have been registered by the following contributors:

Gerd Wilts (8)
fs/hg (2)
Alain Brobecker (1)