Die Schwalbe

14 problem(s) found in 7497 milliseconds (displaying 14 problem(s)). [COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND NOT A='Sheglow, Wiktor S.' AND K='geduldeter Umwandlungsdual'] [download as LaTeX]

1 - P0003417
John Frederick Keeble
2206 The Problemist Fairy Chess Supplement 16, p. 173, 02/1936
P0003417
(4+5) C+
h#2.5 (AP)
1. ... exd6ep 2. 0-0-0 dxe7+ 3. Tf8 exf8=T,D#
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H.Juel: If Black may castle, last move was not made by Ke8 or Ta8, but by Pd5, so it was d7-d5, and hence White may capture en passant. 1... exd6ep 2.0-0-0 dxe7 3.Tf8 exf8=D,T# where the castling (belatedly) justifies the e.p. capture.
Not 1... exd6ep 2.Kd8? dxe7 3.Kc8 e8=D,T
AB: Another 120 retro tries (=60x2 due to tolerated dual promotion) of general form 1. exd6ep 2. T~ dxc7 3. T~ c8=D,T.
No set play
Nachdruck in "Die Schwalbe" 33 mit Diagrammfehler (wBe6 fehlt).
VL: The first AP-problem! Thematic illegal try:
1. ... exd6ep 2.Kd8? dxe7+ 3.Kc8 e8=T(D)#?? (2007-02-11)
Mario Richter: 46 years between this Problem and P1366663 - perhaps this was not Keeble's first AP-Problem?! (2019-08-29)
Ladislav Packa: Of course I know the idea a posteriori. But let my heresy be forgiven - I do not consider it logical. In this particular example, I consider e.p. for proof that black can castling - not vice versa. (2019-08-29)
A.Buchanan: Hi Ladislav. If ep is ok, then Black just moved a pawn with double hop. That doesn't stop Black having e.g. moved bK right at the beginning of the game. So you can't prove that Black definitely can castle this way. What am I missing here? (2019-08-29)
Ladislav Packa: Your statement is perfectly fine. However, the AP condition is usually interpreted as castling is evidence of e.p. However, the second party does not have to do castling - the possibility has already been demonstrated by the existence of e.p. (2019-08-29)
A.Buchanan: Hi again Ladislav. Please try again, I am obviously being very stupid. I don't understand how 1. exd6ep is any more indicative that Black can castle than 1. K~. (2019-08-30)
Ladislav Packa: Hi, Andre!
e.p. is just a result of the d7-d5 move. Black can castle only if it was the last move of black (even without wPe5). Therefore, it does not have the logic of joining the e.p. with castling. For example, ask yourself if black is allowed to castle in the position without wPe5. (2019-08-30)
A.Buchanan: @Ladislav: ep is not "proof that black can castle", rather it is a *necessary* condition for Black to be able to castle. The logical implication is the other way round. We can castle because of the optimistic convention, and because sPd might just have moved. Without wPe, there is no solution, but whatever White plays, Black can castle (2020-12-11)
Hans-Jürgen Manthey: was heißt hier Thematisch Illegal ??
Mir völlig wurscht ob ep möglich oder nicht, nach dem weißen Zug ist natürlich Kd8 möglich !!
also ist auch 1. ... exd6ep 2. Kd8 dxe7+ 3. Kc8 e8DT# eine Lösung, sonst müßte auf die erzwungende Rochade in der Aufgabenstellung hingewiesen werden ! (2020-12-11)
A.Buchanan: Can one tolerate “tolerated dual promotion” in Valladao? Well Valladao himself did, so it must be ok (2022-03-26)
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Keywords: a posteriori (AP) (Type Petrovic), En passant as key, Castling (sg), Promotion (D/T), Tolerated dual promotion (D/T), Valladao Task, Retro Strategy (RS)
Genre: h#, Retro
Computer test: Popeye 4.61
FEN: r3k3/2p1p3/2P1P3/2KpP3/8/8/8/8
Reprints: V. Die Schwalbe 33, p. 323, 06/1975
2001 CHM Themes 12/2000
3 Die Schwalbe 215, p. 240, 10/2005
A1 Problemkiste 169 02/2007
402 Eigenartige Schachprobleme , p. 130, 2010
14 Die Schwalbe 241, p. 374, 02/2010
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2022-06-10 more...
2 - P0573628
Klaus Wenda
v Mat (Belgrade) 01-02/1979
1. Lob
P0573628
(12+13) C+
h#2
Duplex
s) 1. 0-0 Tf1 2. Sd1 Sf7#
w) 1. ... 0-0 2. Tf8 Tc1 3. bxc1=D/T#
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If both sides can castle then d2-d3, f2xLe3, g2x?h3, while sBg-g1=?. If this were S/L it couldn't escape without checking wK, but if D/T then it must still be on the board. Yet Th8 is original. So mutex applies. Note this is RS, not PRA.
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Keywords: Castling, mutual exclusive, Tolerated dual promotion, Retro Strategy (RS)
Genre: h#, Retro
Computer test: C+ Popeye 4.61 (except for promotion dual) and analysis C+ Popeye 4.61 (except for promotion dual) and analysis
FEN: 2bqk2r/ppppp2p/2n5/6N1/7B/3PP2P/Pp2PnRP/1B2K2R
Reprints: König & Turm 2000
W172 Dreiklang 2001
Input: Torsten Linss, 1999-04-17
Last update: A.Buchanan, 2021-06-30 more...
3 - P0576943
Gerson Berlinger
707 Europa-Rochade 04/1989
P0576943
(14+1) C+
ser-h#31
1. Kh2 2. Kg3 3. Kxf3 4. Ke4 5. Kd5 6. Kc6 7. Kb7 8. Kxa8 9. Kb7 10. Kc6 11. Kc5 12. Kb4 13. Kxb3 14. Ka2 15. Kxa1 16. Kb1 17. Kc2 18. Kd3 19. Ke4 20. Kxf4 21. Kg5 22. Kxh6 23. Kg7 24. Kxh8 25. Kg7 26. Kh6 27. Kxh5 28. Kh4 29. Kxh3 30. Kh2 31. Kh1 h8=D/T#
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comment
Keywords: Seriesmover, Tolerated dual promotion, Rex solus (s)
Genre: Fairies
Computer test: Gustav 4.1d
FEN: R6N/7P/1P5P/7P/P1N2P2/1B3P1P/8/B4K1k
Reprints: V34 Problemkiste 125) 10/1999
Input: Felber, Volker, 2000-01-03
Last update: Gunter Jordan, 2023-07-21 more...
4 - P1227732
Evgeny Fomichev
Gennady Koziura

Csak-Majoros 2006
1. ehrende Erwähnung
P1227732
(15+6) C+
s#6
1. Dh1!
1. ... Dxb7 2. Ke3+ Kc5 3. Tc4+ Kxc4 4. Tb4+ Kc5 5. Tb5+ Kc4 6. De4+ Dxe4#
1. ... Lxb7 2. Kg4+ Kc4 3. Df1+ Kd5 4. g8=D+,L+ Ke4 5. Dh1+ Kd3 6. Df3+ Dxf3#
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comment
Keywords: Promotion (D,L), Tolerated dual promotion
Genre: s#
Computer test: Gustav 4.a
FEN: b4N2/1B4P1/1Pqp2Np/3k3P/P6R/P4K1p/1R1P1B1P/4Q3
Reprints: 195 Chess Harakiri 2009
Input: Frank Müller, 2011-12-23
Last update: Rainer Staudte, 2022-09-06 more...
5 - P1273184
Wilhelm Hagemann
Horizont 1947
P1273184
(5+3)
#3
a) nach Diagramm
b) wBh2 nach d3
a) 1. b7xa8=S! d5-d4 2. Sa8-b6 d4-d3 3. a7-a8=D,L#

b) 1. bxa8=T! d4 2. Lh2 Kxh2 3. Th8#
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t/entfernte Springerumwandlung
t/alle Umwandlungen auf demselben Feld;

für a) vgl. Loyd's P1059840
Henrik Juel: C+ Popeye 4.61 (except for promotion mate dual) (2020-10-24)
Henrik Juel: Maybe the animation will work in part b also, if you remove 'a) nach Diagramm' (2021-08-08)
Mario Richter: Position b) was missing and was added now, so the animation should work now.

Part a) is clearly inspired by Loyd's P1059840, so imho the problem should contain some reference that problem (e.g. "after Loyd") (2021-08-09)
comment
Keywords: Promotion (konsekutiv SD/L), Promotion key, under-promotion, Promotion in the mating move, Tolerated dual promotion
Genre: 3#
FEN: bB6/PP6/8/3p4/8/8/5K1P/7k
Reprints: 793 Schach-Echo 6, p. 95, 20/03/1956
Input: Erich Bartel, 2013-06-26
Last update: Mario Richter, 2021-08-09 more...
6 - P1287950
Hilmar Ebert
33 Stern 08/08/1991
P1287950
(6+3) C+
#3
1. 0-0-0! d7-d5 2. cxd6ep e4-e3 3. c7-c8=D,T# (UW-Dual)
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Henrik Juel: C+ Popeye 4.61 (apart from the promotion mate dual) (2020-09-26)
comment
Keywords: Valladao Task, En passant, Castling key, Tolerated dual promotion
Genre: 3#
Computer test: Popeye 4.61
FEN: 8/2Pp4/8/N1P5/4p3/P1k5/8/R3K3
Input: Erich Bartel, 2014-09-12
Last update: Alfred Pfeiffer, 2020-09-26 more...
7 - P1375286
Andrew Buchanan
James Malcom

PDB Website 30/4/2020
P1375286
(6+3)
#2
(-:
1. dxc7ep! b4 2. c8=D,T#

R: 1. ... c8-c6?! and earlier c8=sB?!
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Supersession of P1380851

Superseded by P1380851

The 2018 FIDE laws state: "3.7.2 on its first move the pawn may move as in 3.7.1 or alternatively it may advance two squares along the same file, provided that both squares are unoccupied."

Hence Black's newborn 8th rank pawn, which has never been moved before, reserves the right to commence a double-step on its first move, and likewise White receives the right to capture it en passant as they do with a 7th rank pawn.
Henrik Juel: This un-dummy-pawn is like a pawn created on c8 by the Einstein condition
The retroplay looks wrong, what about 1... d8-d6!? 2.d7-d8=sB!? c6xYb5 (2020-04-30)
James Malcom: That makes much more sense Henrik. I have edited it accordingly. (2020-04-30)
A.Buchanan: You don't like Adrian's (: haha? What about :) then? In heraldic terms, it would be described as "regardant". See 270 on https://www.heraldica.org/cgi-bin/atlas.pl?12. I don't know the word for "non-regardant", which is the default direction for the head, e.g. most of the others on that page.
We could replace wBa6a7 with wSa6, but alas having the 3rd knight is non-thematic & distracting. The other thing I would've liked to do is empty b2 so the promotion is forced to be to D. Such a tiny problem should have precision promotion. Needs more thinking. (2020-05-01)
James Malcom: UPDATE: The position has been edited to have one less piece and a precise queen promotion. (2020-10-12)
A.Buchanan: There is dialogue here which is now orphaned by a change of diagram with new matrix. Suggest we revert to the older diagram and mark it superseded by a new PDB entry here (2020-10-12)
James Malcom: I agree-it is now done. (2020-10-12)
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Keywords: En passant as key, Joke, Joke promotion (b), Tolerated dual promotion (D/T), Promotion (D/T), Superseded by (P1380851)
Genre: 2#, Retro
FEN: k7/PN1N4/PKpP4/1p6/8/8/8/8
Input: James Malcom, 2020-04-30
Last update: A.Buchanan, 2022-09-18 more...
8 - P1389166
Andrew Buchanan
Retros mailing list 12/12/2012
P1389166
(2+1) C+
#3
b) Capture the King: win in 2 moves
a) 1. Kf6 Kh7 2. f8=T Kh6 3. Th8#
b) 1. Kg6 Kg8 2. fxg8=D,T,L,S
1. ... Kg7,Kh7 2. Kxg7,Kxh7
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Duplicate Diagram: P1013439

zu a) s. z.B. P1133499
Henrik Juel: part a) is C+ Popeye 4.61
1.Kf6 Kh7 2.f8=T Kh6 3.Th8#
part b) is damaged by a promotion dual...
1.Kg6 Kg8 2.fxg8=DTLS, 1... Kg7,Kh7 2.KxK (2021-05-02)
A.Buchanan: The point about promotion dual hadn't occurred to me: interesting! On reflection, I think it's like the tolerated dual in regular chess, where if the mating move is =Q/R or =Q/B that's ok, because it would be unreasonable to exclude from soundness all promotion mates where the mated king is not very near to the promoted unit. Similarly here, the promotion captures the opposing king, so the promotion choice is academic. Nevertheless, we would not wish to render unsound *all* king-capturing promotion moves, so we need a tolerated dual! Ground-breaking! :D Thanks so much (2021-05-02)
SP: Herr Buchanan: You are not claiming to have composed part (a), are you?
It has been published by several others. (2023-01-08)
A.Buchanan: The contrast between the two win conditions is the entire point. However this must be represented using the a)&b) notation, which gives the impression that each twin is separate. The composition was just a self-published schema anyway, so who cares? (2023-01-09)
comment
Keywords: Capture the King, Kindergarten Problem, Minimal, Miniature, Tolerated dual promotion (DTLS)
Genre: 2#, 3#, Fairies
Computer test: HC+ Popeye 4.61 part a ok part b has "tolerated dual" for Capture the King stip :-)
FEN: 7k/5P2/8/5K2/8/8/8/8
Reprints: chess.stackexchange.com 2/5/2018
Discord Chess Problems & Studies Server 2/5/2021
Input: A.Buchanan, 2021-05-02
Last update: Mario Richter, 2023-01-09 more...
9 - P1389609
Donald A. Smedley
C24 4. WCCT 1989-1992
8. Platz C
P1389609
(5+14) C+
#13
1. Dd3! Td5 2. Dc4 Tc5 3. Dxh4 Th5 4. Dd4 Td5 5. Dc3 Tc5 6. Dxh3 Th5 7. Dd3 Td5 8. Dc2 Tc5 9. Dxh2 Th5 10. Dg2 Tc5,Td5 11. Dh1 Lh6 12. Dxh6 Th5 13. Df8#
8. ... c5 9. Dxh2 Th5 10. Dg2 Td5 11. Dh1 Lh6 12. Dxh6 Td8 13. exd8=D#,T#
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more ...
comment
Keywords: Promotion (D,T), Promotion in the mating move, Tolerated dual promotion, Tolerated dual promotion
Genre: n#
Computer test: Gustav 4.1d
FEN: n1K1k3/2p1Pp2/1pp1pPp1/r7/7p/7n/1P2Q2p/r1b5
Input: Marcin Banaszek, 2021-05-15
Last update: Alfred Pfeiffer, 2021-08-16 more...
10 - P1390560
Geir Sune Tallaksen Østmoe
Discord Chess Problems & Studies Server 02/05/2021
4. Platz
Discord Composition Tourney 1
P1390560
(14+5)
#1
b) wKf5->e1
c) wKf5->g1
a) 1. dxe6ep#
b) 1. 0-0#
c) 1. f8=D,T#
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Henrik Juel: Black captured [Lc1] and b7xDa6, so in part a) last move was e7-e5
1.dxe6ep#, 1.0-0#, 1.f8=DT# (2021-06-08)
comment
Keywords: Valladao Task, Castling as mating move, En passant, Tolerated dual promotion, under-promotion (T)
Genre: Retro
FEN: B7/p4P2/p7/P2PpK2/6P1/3P1kpP/1P1P2R1/2NN3R
Input: A.Buchanan, 2021-06-08
Last update: Alfred Pfeiffer, 2021-09-30 more...
11 - P1390966
Friedrich Freiherr von Wardener
Die Welt 1954
P1390966
(11+5) C+
s#4
1. Sdc8! e6 2. Lf8 h4 3. Se7 Kd6 4. b8=D,L+ Sc7#
1. ... h4 2. Ld6+ exd6 3. Tc5 dxc5 4. b8=D,L+ Sc7#
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Cheney-Loyd Kombination im Selbstmatt,
erstmalig 1954?
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Keywords: Cheney-Loyd, Promotion (D,L), Tolerated dual promotion
Genre: s#
Computer test: A. Baumann: Gustav 4.2a
FEN: K7/PP2p3/1N1N4/1R1nk1Pp/4b3/B3Q2B/3P4/8
Reprints: 596 Deutsche Schachzeitung 3, p. 72, 12/1954
Input: Dieter Berlin, 2021-06-21
Last update: Dieter Berlin, 2024-03-19 more...
12 - P1400858
Grigory Popov

2. Lob
P1400858
(4+12) C+
#10
1. h8=D#,T#? Kxg1!

1. Tg7! e2+ 2. Kxe2 d1=D+ 3. Ke3+ De2 4. Kd4 Dd2+ 5. Ke5 De2+ 6. Kd6 b3+ 7. Kd7 Dd2+ 8. Kc8 Dg2 9. Tgxg2+ Kh3 10. h8=D#,T#
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Pulled from http://popovgl.narod.ru/Popovian/P-2010-10.html

The source is given there as:
600-let Gryunfel'dskoi bitvyi
Nauji Ushdaviniai nr. 4/2010-2040
2 pokhval'nyi otsyv
Henrik Juel: Popeye 4.61 with 'opt thr 1' found no flaws (apart from the promotion dual h8=DT) (2022-04-25)
comment
Keywords: Promotion (d), Tolerated dual promotion, Cross check (Kd)
Genre: n#
Computer test: Popeye 4.86
FEN: 8/1p5P/1p6/1p6/1p6/b1p1p3/r1Rp3k/qn1K2R1
Input: James Malcom, 2022-04-25
Last update: James Malcom, 2022-04-25 more...
13 - P1401838
Grigory Popov
SuperProblem (Website) 2008
nach Avenir Popandopulo
P1401838
(7+10)
#17
1. Te2+! Kf1 2. Te3+ Kf2 3. f4 g4 4. Te2+ Kf1 5. Te4+ Kf2 6. f5 g5 7. Te2+ Kf1 8. Te5+ Kf2 9. f6 g6 10. Te2+ Kf1 11. Te8+! Kf2 12. f7 Sd7 13. f8=D+/T+ Sxf8 14. Te2+ Kf1 15. Te6+ Kf2 16. Tf6+ Kxe1 17. Tf1#
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See P1386417

http://superproblem.ru/archive/Stat/Stat8.html
Anton Baumann: Dual: 13.f8=T+ (2022-06-15)
James Malcom: The classical tolerated promotion dual, to be precise. (2022-06-16)
Henrik Juel: Usually only promotion mate duals are tolerated (2022-06-16)
comment
Keywords: Promotion (D), Tolerated dual promotion
FEN: 1nr5/6pr/4R1p1/2p3p1/2B5/5Pp1/2KP1kP1/4N1b1
Input: James Malcom, 2022-06-14
Last update: James Malcom, 2022-06-16 more...
14 - P1402955
Kurt Keller
3675 ChessStar 23/07/2022
P1402955
(2+5) C+
h#5
1. a4 bxa4+ 2. Kc4 a5 3. Kb5 a6 4. Ka5 a7 5. b5 a8=D,T#
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Comments:
SCHRECKE: Umwandlungsdual (a8T#) im Hilfsmatt ist nicht jedermanns Sache - meine auch nicht! (2022-07-23)
Henrik Juel: so the problem is not C+... (2022-07-23)
Kurt Keller: see keyword "tolerated dual promotion":
"Sometimes, the mating move is a promotion, and both D/T would mate. Similarly, sometimes D/L would both work. This is a tolerated dual under Article 13 of the Codex, because if it were not allowed, too many matrices would be invalid."
Article 13 (https://www.wfcc.ch/1999-2012/codex/):
"(2) Help-play compositions are unsound also if they are dualized, except that in the final move a promotion into different pieces having partially the same power (for example queen/rook or queen/bishop) may be tolerated [16]."
Therefore, the problem is sound (C+). (2022-07-23)
comment
Keywords: Symbol problem (cross), Kindergarten Problem, Minimal (B), Miniature, Symmetrical position, Asymmetrical solution, Sacrifice key, Sacrifice of black pieces (active), Active sacrifice, White correction (for Black), Selfblock, Switchback (k), Promotion in the mating move, Tolerated dual promotion (D/T)
Genre: h#
Computer test: Gustav 4.1 d
FEN: 8/1K6/1p6/pkp5/1p6/1P6/8/8
Input: Kurt Keller, 2022-07-23
Last update: Kurt Keller, 2022-10-28 more...
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The problems of this query have been registered by the following contributors:

Gerd Wilts (1)
Torsten Linss (1)
Felber, Volker (1)
Frank Müller (1)
Erich Bartel (2)
James Malcom (3)
A.Buchanan (2)
Marcin Banaszek (1)
Dieter Berlin (1)
Kurt Keller (1)