Die Schwalbe

36 problem(s) found in 3606 milliseconds (displaying 36 problem(s)). [COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND NOT K='Längstzüger' AND K='Ökonomierekord'] [download as LaTeX]

1 - P0000933
Luigi Ceriani
Sahovski vjesnik 12/1951
1. Preis
P0000933
(2+11) C+
Letzter Zug?
R: 1. Kg8xDh8
Solved in YouTubex httx//www. youtube. com/watch?v=Do_rkLQnrpk
play all play one stop play next play all
Compare P0000490 with equivalent material but 30 years later.
A.Buchanan: Solved in YouTube: https://www.youtube.com/watch?v=Do_rkLQnrpk (2022-02-17)
more ...
comment
Keywords: Type A, Last Move? (KxD), Economy record (Last Move? Type A), Type B (a fortiori), Economy record (Last Move? Type B), Minimal
Genre: Retro
Computer test: Solved in YouTube: https://www.youtube.com/watch?v=Do_rkLQnrpk
FEN: 3bkN1K/pppprp1p/4p1p1/8/8/8/8/8
Reprints: 1372 FEENSCHACH 08-09/1952
Problem 10-12 12/1952
1.2A Eigenartige Schachprobleme , p. 172, 2010
1.2B Eigenartige Schachprobleme , p. 172, 2010
YouTube 13/02/2022
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-06-01 more...
2 - P0001030
Jan R. Mortensen
Werner Keym

Die Schwalbe 1984
P0001030
(3+6)
Welches war der letzte Zug?
Schwarz am Zug
R: 1. f7xLg8=T
play all play one stop play next play all
siehe auch P0001031
Henrik Juel: Source is almost surely Caissa 1979 (CA stopped in 1930) (2020-12-17)
A.Buchanan: According to Werner Keym in ES, the original source is JM+WK Die Schwalbe 1984. That probably means that Werner modified P0001031 to tackle the different task here. I will adjust the source & authors accordingly. For these task problems, no-one tracks versioning, or afters. We just lump together all the composers who lent a hand. (2020-12-18)
Henrik Juel: OK, fine
Of course, this is also an example of First move by promoted Tg8, but not an economy record in this genre (2020-12-18)
A.Buchanan: Any last move which is promotion is implicitly a zero move for a the promoted unit. So I feel probably not worth adding the keyword of first move except for those which were intended as first move records. What do you think? (2020-12-19)
Henrik Juel: The same position with wSg8 was similar, but it was a double economy record, I think
The position with wTg8 is a last move record, but not a first move record, as removing Th7 and moving Ph6 to h7 is more economical
The first move problems with a zero move are not very impressive, so your approach is fine (2020-12-19)
comment
Keywords: Last Move? (BxL=T), Type B, Promotion (T), Economy record (Last Move? Type B)
Genre: Retro
FEN: k4bRK/4p1pR/5p1p/8/8/8/8/8
Reprints: 1.45B Eigenartige Schachprobleme , p. 188, 2010
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2022-03-30 more...
3 - P0001031
Jan R. Mortensen
Deutsche Schachrundschau Caissa 1979
P0001031
(3+6)
Welches war der letzte Zug?
Schwarz am Zug
(Erster Zug des wUWS?)
R: 1. f7xLg8=S
play all play one stop play next play all
Henrik Juel: Not R: 1.f7xSg8=S,
because the black knight can be extracted only by retracting f7-f6, trapping white king (2020-12-13)
A.Buchanan: Some brave person should sort out the keywords for record retros properly. Here's a good example. The last move is Type B, but the first move question is Type A. The original stipulation (which I think is just about the first move?) should stand. The first move question is a *deemed* stipulation (new terminology) and allows us to leverage an existing problem, without creating a new version or editing the prior stipulation. This is particularly true here, since the problems are of different type. (2020-12-14)
Hans-Jürgen Manthey: mögliche Retro-Zugfolge:
1.f7xLg8S Ka7-a8 2. e6xSf7 Sd6-f7+ 3. e5-e6 Le6-g8 4. Kg8-h8 Lc8-e6+ 5. Th8-h7 Ka8-a7 6. Kh7-g8 Kb7-a8 7. Kg6-h7 Kc7-b7 8. h7-h8T Kd8-c7 9. d4xSe5 Sd7-e5+ 10. Kf5-g6 Sf7-d6+ 11. g6xTh7 Th8-h7 12. g5-g6 h7-h6 13. Ke6-f5 Sh6-f7 14. g4-g5 Sg8-h6 15. e3xTd4 Ta4xSd4 16. f2xDe3 Dd2-e3+ 17. g2-g4 Ke8-d8 18. Kf5-e6 De2xd2 19. Ke4-f5 Dd1xe2+ 20. Kd3-e4 Df1xTd1 21. Sf3-d4 Dh1xLf1 22. Kc2-d3 Sb8-d7 23. Kc1-c2 Dh2xTh1 24. O-O-O Dc7xh2 25. Sg1-f3 Ta8xDa4 26. Dd1-a4+ Dc2-c7 27. Se6-c7+ Dc1xc2 28. Sc5-e6 Db2xLc1 29. Sd7-c5 Da2xb2 30. Se5xd7 Da5xa2 31. Sc6-e5 f7-f6 32. a7xc6 Dd8-a5 33. Sb5xa7 c7-c6 34. Sc3xb5 b7-b5 35. Sb1-c3 (2020-12-17)
Henrik Juel: 'The Chess Amateur 1979' must be wrong, as this magazine stopped in 1930 (2020-12-17)
Henrik Juel: .. and Eigenartige Schachprobleme just says Caissa 1979 (2020-12-17)
A.Buchanan: WinChloe does not have this problem at all! I am inclined to go with Eigenartige Schachprobleme. I suspect that Gerd was entering hundreds of compositions at scale, and a copy-paste error would be easy (2020-12-17)
A.Buchanan: Also P0001030 (2020-12-17)
A.Buchanan: Have removed "The Chess Amateur" as original source here. (2020-12-18)
comment
Keywords: Last Move? (BxL=S), Type B, Promotion (S), Economy record (Last move? Type B), First Move? (US0), Type A, Economy record (First move? Type A)
Genre: Retro
Computer test: RSP 1.2
FEN: k4bNK/4p1pR/5p1p/8/8/8/8/8
Reprints: The Chess Amateur 1979
1.55B Eigenartige Schachprobleme , p. 192, 2010
2.51 Eigenartige Schachprobleme , p. 202, 2010
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2022-03-30 more...
4 - P0001086
Peter Kahl
Jan R. Mortensen
Sveto Stambuk

Problem 5-6, p. 92, 12/1951
6. ehrende Erwähnung
P0001086
(4+1)
Welches war der letzte Zug?
R: 1. Dh3xSh2+
play all play one stop play next play all
im Original ist als Dritter Autor D. Suboticanec angegeben, habe entsprechend geändert.
Zu P. Kahl heißt es ergänzend: [aus] Osterholz-Scharmbeck
HBae: Ist "Klaus Peter Kahl" identisch zu "Peter Kahl" ? (2010-09-22)
Henrik Juel: Yes, probably
I know that 'Jan Robert Mortensen' is identical to 'Jan Mortensen'; he never used his middle name (2017-03-08)
A.Buchanan: It’s possible to put the middle name into the “addition” field in the author table, rather than have two names in the “first name” field. Then in overview list the middle name won’t appear, but it will still appear above each composition as here. Curiously the addition field is common across all four languages (German, English, French, Unicode) supported by the author table. There is no comment field to allow for random extra info to be stored, unlike the source table. So if we drop Robert, we lose it completely. (2022-03-31)
Henrik Juel: Thanks for the info, Andrew
I guess we will have to live with it
For Jan, there is really no risk of confusion
But for Knud Hannemann (son of the less illustrious composer Harald Hannemann) it is annoying to see him cast as Knud Harald Hannemann, just because it was a custom in his family that the sons were given the father's first name
They still use this custom in Russia, but with 'son of' added, e.g., Vladimir Vladimirovitch Putin (2022-03-31)
Henrik Juel: A chess problem example is Nikita Michaelovitch Plaksin
But the rendering of his name in the PBD also gives an obvious partial solution to my problem
Change the middle name of the two danish composers to the corresponding initial:
Jan R. Mortensen and Knud H. Hannemann (2022-03-31)
Henrik Juel: Thanks for the 'initialization', Andrew (2022-03-31)
A.Buchanan: OK fixed those, Henrik. HBae's original question concerned "Klaus Peter Kahl" vs "Peter Kahl". The former only has 2 problems here, and "both" collaborated with Jan Mortensen, so surely this is one person? (2022-03-31)
A.Buchanan: Kahls unified (2022-04-01)
Henrik Juel: I hear no protests from Osterholz-Scharmbeck, so that seems fine (2022-04-01)
comment
Keywords: Type C, Last Move? (DxS), Economy record (Last Move? Type C)
Genre: Retro
FEN: 8/8/8/8/7P/6P1/5K1Q/7k
Reprints: 1375 FEENSCHACH 08-09/1952
(C10) feenschach 160 07-08/2005
1.11C Eigenartige Schachprobleme , p. 176, 2010
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2022-04-01 more...
5 - P0001468
Oskar E. Vinje
The Fairy Chess Review 1938
P0001468
(10+3)
Letzter Zug?
R: 1. 0-0-0
play all play one stop play next play all
Deemed stipulation: "Erster Zug des wTd1?"
Henrik Juel: White pawns captured all 13 missing black men
Retracting the castling is the only way to give Black a retraction, e.g. Kc2-b3 (2020-12-01)
comment
Keywords: Type A, Last Move? (0-0-0), Castling (wl), Economy record (Last Move? Type A), First Move? (T0), Economy record (First move)
Genre: Retro
FEN: 8/P1p5/PN6/1P6/P1N5/Pk6/pP6/2KR4
Reprints: 342 Europe Echecs 241 01/1979
1.57A Eigenartige Schachprobleme , p. 194, 2010
1 Die Schwalbe 360-1, p. 737, 12/2020
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2023-05-28 more...
6 - 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...
7 - P0003347
Marko Klasinc
3. Makuc-Moder-Gedenkturnier 1971-1973
1. Lob
P0003347
(7+6) C+
h#2
1. axb3ep bxc6+ 2. b5 cxb6ep#
play all play one stop play next play all
Marko Klasinc: The most economical h#2 with two e.p. captures. (2002-01-28)
A.Buchanan: Very nice - and i think this is unbeatable at least in the case where ep is first and last move (2020-08-02)
A.Buchanan: Also works as set play! Just truncate Black's first move! :) (2020-12-09)
more ...
comment
Keywords: En passant as key, Economy record, En passant as mating move
Genre: h#, Retro
Computer test: C+ Popeye v4.61 + a little thinking
FEN: 8/1p6/B1p5/RPP5/pPkp4/K1p5/P7/8
Input: Gerd Wilts, 1995-06-03
Last update: A.Buchanan, 2020-12-09 more...
8 - P0007827
Bernd Schwarzkopf
(23) feenschach 55, p. 124, 07/1981
P0007827
(11+6)
Welches war der erste Zug?
a) oben: des wUWTb8?
b) unten: der wDd1?
c) unten +wDd1: des wKe1?
a) 0 Züge
b) 0 Züge
c) 0 Züge
play all play one stop play next play all
Bernd Schwarzkopf: Nur Forderung a (b und c gehören zu einem anderen Problem);
Lösung: UW-Tb8 zog nie (2015-03-13)
Mario Richter: In fs55 sind die verschiedenen Stellungén in einem Diagramm zusammengefaßt. Ich sehe zwei Möglichkeiten, wie wir das in der PDB behandeln:
1. So wie aktuell eingegeben (nahe an der historischen Wahrheit, aber schlecht visuell wahrnehmbar - der Nutzer muß wissen, daß er auf die Lösungen zu b) bzw. c) klicken muß, um die entsprechenden Diagramme zu sehen).
2. Aufsplitten in zwei separate Aufgaben.
Was wird gewünscht/präferiert? (2015-03-14)
Henrik Juel: I prefer your second option, Mario (2015-03-14)
Thomas Brieden: Hätte ich obigen Text nicht gelesen, hätte ich auch nicht gewusst, dass man auf entsprechende Lösungen klicken muss. Ich bevorzuge daher auch den zweiten Vorschlag. (2015-03-14)
Alfred Pfeiffer: Diagramm (als Zeroposition) und Forderung so klarer? (2015-03-15)
Olaf Jenkner: So gefällt es mir. (2015-03-15)
A.Buchanan: In the zero diagram, one might also put in a line between ranks 4 & 5. This separator is used in PDB for grid chess etc, but could be helpful here. What do you think? (2020-11-11)
Olaf Jenkner: If I was asked, good idea.
Maybe there's an issue because the line doesn't vanish in a), b) and c) (2020-11-12)
comment
Keywords: First Move? (UT0 / D0 / K0), Type A, Economy record (First move)
Genre: Retro
FEN: KRb1k3/pp1p4/8/8/4k3/8/1PPPPPP1/2B1KB2
Reprints: 2.38 Eigenartige Schachprobleme , p. 200, 2010
2.8 Eigenartige Schachprobleme , p. 198, 2010
2.1 Eigenartige Schachprobleme , p. 198, 2010
Input: Gerd Wilts, 1996-09-03
Last update: A.Buchanan, 2020-12-01 more...
9 - P1080647
Dmitri Baibikow
503 Shakhmatnaya Kompozitsiya 74 2006
2. Preis
P1080647
(11+9)
Ergänze Steine!
R: 1. [+wTb2;+wSa4,+wSa2,+sLb5,+sSc5,+sSc3] d2-d3+ 2. Sd3-c5 Sc5-a4+ 3. La4-b5+ Tb5-b2+ 4. Sb2-d3+ Sb4-a2 5. Db1-a1+ Sa2-b4 6. Se4-c3+ Sc3-a2 7. Sg3-e4 g5-g6 8. Sf1-g3 g4-g5 9. f2-f1=S g3-g4 10. f3-f2
play all play one stop play next play all
Henrik Juel: the animation does not work (2023-04-13)
Mario Richter: Entering the diagram position as zero position and the solution Position [i.e. with the added pieces] as Position a) should make the Animation work correctly ... (2023-04-14)
comment
Keywords: Add pieces, Type C, Economy record
Genre: Retro
FEN: 8/1PPPp3/BpQp2P1/r2p4/2k5/K2PP3/2R1P3/q1bb4
Reprints: 6C) Economy Records in Add Unit(s) Problems , p. 7, 03/2011
Input: Gerd Wilts, 2009-01-19
Last update: Mario Richter, 2023-04-14 more...
10 - P1085411
Werner Keym
13393 Die Schwalbe 225 06/2007
P1085411
(8+9)
Letzter Zug?
Duplex
s) R: 1. b3xBa2 f6xBg7
w) R: 1. ... f6xBg7 2. b3xBa2
play all play one stop play next play all
All captures are accounted for by hungry pawns, wBf1 died at home, & bPh waylaid. wPa & bPg can only have been captured on their home squares. bPc6 & bPd6 can't have just moved as they would close off bB homes. Most interestingly, wPd4 must have captured light-squared bB, but did not do so recently, as wPf3 would lock the south-east cage. Need Ng1 to shield wKh1, allowing bKg3. So the two last single moves are clear, and may have occurred in either order.
Henrik Juel: Good analysis, Andrew (2024-02-19)
comment
Keywords: Last Move? (BxB,BxB), Type D (DD), Economy record (Last Move? Type DD), Volet Pawn (2), waylaid (sBh)
Genre: Retro
FEN: 8/ppp3P1/2pp4/8/4P3/7P/p1PPPkPK/4bq2
Input: Gerd Wilts, 2009-06-08
Last update: A.Buchanan, 2024-02-19 more...
11 - P1227253
Andrew Buchanan
N1QCi) Economy Records in Add Unit(s) Problems , p. 4, 06/06/2011
P1227253
(5+5)
Add one unit.
+wDa2
R: Tb2-b1++
play all play one stop play next play all
Impossible treble check, so blocking unit needed on b2 or a2. If the former, then Bl just played R: 1. axb1=T++ & Wh only has a prior move if b2 unit is wS, but then illegal check to sK. So the unit must be added on a2. Last move was not b2-b1=R++ because of prior illegal check from sBb2. So it must be Tb2-b1++ (a capture implies retro pat). So what's on a2? Prior White move was not Kb1-a1, or the check from Tb2 is impossible. So it was L/D allowing L/Db1*a2. If the former, then there is a core cage comprising wKa1 wLb1 wBb3c2d2 sTb2 which can never unlock. So can only be +wDa2, with no problem for wD eventually sliding out.
Economy record for an "Add one unit" problem, type C, in which the unit to add is a Queen.
See http://abrobecker.free.fr/chess/addunits.pdf (2011-12-16)
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Keywords: Type C, Add pieces, Economy record
Genre: Retro
FEN: 8/8/8/8/1P6/rPb5/2PP4/Krnk4
Input: Alain Brobecker, 2011-12-16
Last update: A.Buchanan, 2023-04-13 more...
12 - P1227257
Andrew Buchanan
N18Ci) Economy Records in Add Unit(s) Problems , p. 6, 23/07/2011
P1227257
(9+5)
Add 18 units.
+wBa4b2d2f2h4 +wLc1 +wDc3 +sBa5b6c7d7e7f3g7h5 +sLf8 +sTc4 +sDg3
R: S-d4
play all play one stop play next play all
All pieces will be on board so pawns remain on their original files.
+BPc7d7e7g7 & +WPd2, implying +BBf8. Since BBd5 is out we've +BPb6 +WPb2, entailing +WBc1.
WKb3 is attacked by WNd4, so we need 4 units on the lines to the Ks and one of those lines is blocked by P, so +BPf3 +WPf2. Since all Rs must be out, we have +WPa4h4 +BPa5h5. Lastly, the remaining line interceptions are +BRc4 +WQc3 +BQg3.
Record of the highest number of units to add so that a position becomes legal (Type C, number of units specified).
See http://abrobecker.free.fr/chess/addunits.pdf (2011-12-16)
Henrik Juel: Good problem with well-explained solution (2021-01-17)
A.Buchanan: Thanks Henrik :) (2021-01-18)
comment
Keywords: Type C, Add pieces, Economy record
Genre: Retro
FEN: 8/8/2PNP1P1/1N1b4/1R1n2k1/1K1r4/6Rn/3B4
Input: Alain Brobecker, 2011-12-16
Last update: A.Buchanan, 2023-04-13 more...
13 - P1227636
Thierry Le Gleuher
5A) Economy Records in Add Unit(s) Problems , p. 7, 12/03/2011
P1227636
(15+8)
Add the missing unit(s)
b) +sBa3,sBb3,sBc3,sBd3,sBe3 R: 1. Sh3-g1 a4-a3 2. Dh1-d1 a5-a4 3. Tg1-b1 a6-a5 4. Lb7-a8 a7-a6 5. Lc8-b7 b4-b3 6. Kb1-a1 b5-b4 7. Kc1-b1 b6-b5 8. Kd1-c1 b7-b6 9. Ke1-d1 c4-c3 10. Kf1-e1 c5-c4 11. Kg2-f1 c6-c5 12. Ta1-g1 c7-c6 13. Dd1-h1 d4-d3 14. Kf1-g2 d5-d4 15. Ke1-f1 d6-d5 16. Sg1-h3 e4-e3 17. Lh3-c8 e5-e4 18. Lf1-h3 e6-e5 19. g2xDf3 Kg4-h5 20. Sf5-h6+
play all play one stop play next play all
WBc1 taken home, so no BP captured or promoted and it's impossible to retract WPe6xf7.
The only way to open the cage is to reorder white homebase and retract WPg2xf3, this takes 19 retro moves. Add all remaining BPs on third rank, and we can't retract both BPs on b7 and d7 to let the BBg8 get home, and we can't either retract BP to e7 since the BPg must retract to g7 in order to allow uncapture of dark squared BB by WPf7.
Record of the highest number of units to add so that a position becomes legal (Type A, number of units not specified, no promoted pieces).
See http://abrobecker.free.fr/chess/addunits.pdf (2011-12-22)
Alain Brobecker: See P1227635 for a version with promoted pieces. (2011-12-22)
Henrik Juel: Add five black pawns on a3,b3,c3,d3,e3 to provide the 18 tempo retractions needed.
-1.Sh3 a4 -2.Dh1 a5 -3.Tg1 a6 -4.Lb7 a7 -5.Lc8 b4 -6.Kb1 b5 -7.Kc1 b6 -8.Kd1 b7 -9.Ke1 c4 -10.Kf1 c5 -11.Kg2 c6 -12.Ta1 c7 -13.Dd1 d4 -14.Kf1 d5 -15.Ke1 d6 -16.Sg1 e4 -17.Lh3 e5 -18.Lf1 e6 -19.g2xDf3 Kg4 -20.Sf5 etc. (2011-12-22)
James Malcom: What formatting is required to add the five black pawns to the board with the solution? I know I have seen it done before somewhere. (2022-01-30)
A.Buchanan: You define another pieces list labelled e.g. b, then include that in the solution before you start moving pieces. Check out some other add pieces problems to see how it’s done. (2022-01-31)
James Malcom: Thanks! I have it figured out now. (2022-01-31)
comment
Keywords: Type A, Add pieces, Economy record
Genre: Retro
FEN: B5bn/5PrR/5prN/6pk/7p/5P2/PPPPPP2/KR1Q2N1
Input: Alain Brobecker, 2011-12-22
Last update: A.Buchanan, 2023-04-13 more...
14 - P1262409
Richard Stanley
Retros mailing list 08/11/2002
P1262409
(16+16) C+
From the game array, 11 moves by Black, followed by 1 mating move by WNg1, to reach the diagram.
Hans-Jürgen Manthey: R: 1. h7-h5 2. Th8-h6 3. Th6-g6 4. Tg6-g4 5. g7-g6 6. Lf8-h6 7. Ke8-f8 8. Kf8-g7 9. Kg7-f6 10. Kf6-g5 11. Kg5-h4 Sg1-f3# (2021-07-26)
comment
Keywords: Proof Game as Series Helpmate (Sg), Unique Proof Game, Seriesmover, Economy record
Genre: Retro, Fairies
Computer test: F.Labelle a verifié que c'est bien le minimum possible.
FEN: rnbq2n1/pppppp2/6pb/7p/6rk/5N2/PPPPPPPP/RNBQKB1R
Input: A.Buchanan, 2013-02-12
Last update: A.Buchanan, 2021-07-31 more...
15 - P1294321
Andrew Buchanan
www.anselan.com 2001
P1294321
(1+2)
Black to move. Last move?
R: 1. Kb8xSa8
play all play one stop play next play all
Compare P0001033.
Gerald Ettl: steht der sLh5 vielleicht auf h2 ?? (2023-07-02)
SCHRECKE: Why not R: Kb8xLa8? (2023-07-03)
Mario Richter: Wie "SCHRECKE" mit seiner Frage schon illustriert hat: mit dem sL auf h2 wäre das Problem inkorrekt, da neben R: 1. Kb8xSa8 auch R: 1. Kb8xLa8 als letzter Zug möglich gewesen wäre. Grund sind die etwas verwirrenden Dead-Reckoning-Regeln: mit sLh5 kann zuletzt nicht Kb8xLa8 geschehen sein, da in der Stellung wKb8 - sKb6 sLh5 sLa8 wegen der unzureichendes-Material-zum-Mattsetzen-Regel das Spiel schon in dieser Position beendet gewesen wäre, der wK als gar nicht mehr zur Ausführung eines Zuges geommen wäre ... (2023-07-03)
Mario Richter: Dear James, I suggest that you undo last change and put the black bishop back on h5! (2023-07-03)
A.Buchanan: There are 17 valid squares for the wB. Got to be on a light square for reasons given. Also it can't occupy or attack c8. And can't be attacking a8 because BTM. I think h5 selection was random, but could argue for any. (2023-07-04)
A.Buchanan: Or maybe bBa4, with which White by his last move avoided a completely sound #12. (2023-07-04)
Gerald Ettl: Dann waere es vielleicht ganz sinnvoll man schreibt die Bedingung unter das Diagramm. (2023-07-04)
A.Buchanan: Hi Gerald, it's not a condition, it's a FIDE rule since 1997, invented by a problemist who is also a rules committee member (Igor Vereschchagin) and approved by the rules committee (headed by FIDE Head International Arbiter Stewart Reuben), backed up by a WFCC convention since 2015 (Kjell Widlert & Michel Caillaud, responding to a request from some endgame studiers who understood that it was a real thing. Like 50M rule, it applies by default for retro problems. And the PDB keywords here give the game away anyway. If it was a forward stipulation, then I would indeed add a stipulation, e.g. P1208623. Please enjoy the madness that is DP rule :) P.S. I have found recently that it was really invented by Shakespeare. (2023-07-04)
Gerald Ettl: Ich spiele nicht nach den FIDE-Regel. (2023-07-04)
Olaf Jenkner: Allright.
https://www.skat-online.com/regeln-hilfe/regelwerk/internationale-skatordnung.html (2023-07-05)
comment
Keywords: Type B, Last Move? (KxS), Dead Position, Economy record (Last Move? Type B), Rex solus (W), Aristocrat, Miniature, Minimal
Genre: Retro
FEN: K7/8/1k6/7b/8/8/8/8
Reprints: Retros mailing list 20/02/2007
Input: A.Buchanan, 2015-01-07
Last update: James Malcom, 2023-07-03 more...
16 - P1382488
Andrew Buchanan
Thomas Thannheiser

1509 Julias Fairies 25/05/2020
P1382488
(13+15) C+
PG in 8.5
Alphabetic Chess
1. a4 a5 2. Ta3 Ta6 3. Tb3 Tb6 4. Sa3 Txb3 5. Sb5 Ta3 6. b4 Txa4 7. bxa5 Txa5 8. Sa3 Ta8 9. Sb1
play all play one stop play next play all
Aims to be the shortest SPG for a homebase position which demonstrates this fairy condition.
Henrik Juel: I cheated and used Jacobi
Nice condition-specific manouver by Sb1 (2020-11-26)
comment
Keywords: Unique Proof Game, Homebase (2), Alphabetic Chess, Economy record (Alphabetic homebase)
Genre: Retro, Fairies
Computer test: Jacobi v0.4.7
FEN: rnbqkbnr/1ppppppp/8/8/8/8/2PPPPPP/1NBQKBNR
Input: A.Buchanan, 2020-11-26
Last update: A.Buchanan, 2021-10-05 more...
17 - P1382903
Andrey Frolkin
Andrew Buchanan

2 Die Schwalbe 360-1, p. 737, 12/2020
P1382903
(14+12)
Erster Zug des wTf6?
R: 1. Tf1xBf6! b6xSa5 2. 0-0! a7xSb6 3. Lf1-e2 Kd4-e5,Kf4-e5 4. e2-e3+
play all play one stop play next play all
James Malcom: How does this work exactly? What forbids the rook from just making some random tempi move in a game that leads to this position? (2020-12-12)
Mario Richter: James, think of time pressure. In the diagram, Black has only two retractions (a7xSb6xSa5). The only way to unlock the position is the retraction of e2-e3.
Little hint: castling is considered as a king m,opve ... (2020-12-12)
Henrik Juel: By now there are so many clues revealed for this fine retro that I dare to give a retroplay despite the Byzantine dating, in this case indicating an ongoing solving competition
R: 1.Tf1xPf6 b6xSa5 2.0-0 a7xSb6 3.Lf1-e2 Kd4,Kf4 4.e2-e3+ etc.
Incidentally, TxP is not the first move, but the last... (2020-12-12)
Henrik Juel: I missed the from square in the retraction by the black king, sorry
3... Kd4-e5,Kf4-e5 (2020-12-12)
A.Buchanan: Ha, there is no solving competition for these either. But it's to avoid Gerd's solving competition protection algorithm picking up false positives (2020-12-12)
A.Buchanan: TxP happens to be the last move, but it's also the first effective move of the rook, as it is considered to be a *passenger* in the castling, and not to have moved yet. Otherwise can't get first move of a rook fixed if it capturing (except possibly by DP logic). See the explanatory article: https://www.dieschwalbe.de/download/artikel/Passenger_Rooks.pdf (2020-12-12)
A.Buchanan: Your solution is completely correct, Henrik! (2020-12-12)
comment
Keywords: Economy record (First move), Type A, First Move? (TxB), Castling in the retro play (wk), Non-standard material (l), Castling (wk)
Genre: Retro
FEN: 5b1n/1p2prBP/P2PrRQb/p2pk1pR/7p/3PP3/1P2B1PP/6K1
Reprints: 2 Die Schwalbe Online 12/2020
Input: A.Buchanan, 2020-12-12
Last update: A.Buchanan, 2023-08-15 more...
18 - P1382904
Andrey Frolkin
Andrew Buchanan

3 Die Schwalbe 360-1, p. 737, 12/2020
P1382904
(14+10)
Erster Zug des wTf6?
R: 1. Lg2-f3 b4-b3 2. Tf1xSf6! b5-b4 3. 0-0! b6-b5 4. Lf1-g2 Kf4-g5,Kh4-g5 5. g2-g3+
play all play one stop play next play all
Henrik Juel: Oh, I was confused by the LLLLl, which should be TLLLLl, I believe
R: 1.Lg2-f3 b4-b3 2.Tf1xSf6! b5-b4 3.0-0 b6-b5 4.Lf1-g2 Kf4-g5,Kh4-g5 5.g2-g3+ (2020-12-12)
A.Buchanan: Thanks for the catch. I copied the diagrams straight from the article FEN, so should be clean of transcription errors, but then I put in the non-standard material field by hand & eye, so could be other errors as here. (2020-12-12)
A.Buchanan: Your move sequence is again correct! :D (2020-12-12)
more ...
comment
Keywords: Economy record (First move), Type A, First Move? (TxS), Castling in the retro play (wk), Non-standard material (TLLLLl), Castling (wk)
Genre: Retro
FEN: 3bRBB1/2ppBQRp/3ppRBb/6kB/6p1/1p3BP1/4P2P/6K1
Reprints: 3 Die Schwalbe Online 12/2020
Input: A.Buchanan, 2020-12-12
Last update: A.Buchanan, 2023-08-15 more...
19 - P1382906
Andrey Frolkin
Andrew Buchanan

4 Die Schwalbe 360-1, p. 738, 12/2020
P1382906
(14+9)
Erster Zug des wTf8?
R: 1. Tf1xLf8! e4-e3 2. 0-0! e5-e4 3. Lf1-g2 e6-e5 4. g2xBh3 h4-h3 and e.g. 5. d4-d5 h5-h4 6. Le4-c6 h6-h5 7. c7-c8=L! h7-h6 8. c6-c7 c7xLb6
play all play one stop play next play all
Henrik Juel: Good motivation for TxL
R: 1.Tf1xLf8! e4-e3 2.0-0 e5-e4 3.Lf1-g2 e6-e5 4.g2xPh3 h4-h3 and e.g.
5.d4-d5 h5-h4 6.Le4-c6 h6-h5 7.c7-c8=L! h7-h6 8.c6-c7 c7xLb6
f7xTg8=L happened early (2020-12-12)
comment
Keywords: Economy record (First move), Type A, First Move? (TxL), Castling in the retro play (wk), Non-standard material (LL), Castling (wk)
Genre: Retro
FEN: k1B2RQ1/Pp1pp1p1/rpB3N1/pN1P4/8/4p2P/2P1P1BP/6K1
Reprints: 4 Die Schwalbe Online 12/2020
www.thbrand.de 13/12/2020
Input: A.Buchanan, 2020-12-12
Last update: A.Buchanan, 2023-08-15 more...
20 - P1382907
Andrey Frolkin
Andrew Buchanan

5 Die Schwalbe 360-1, p. 738, 12/2020
P1382907
(13+12)
Erster Zug des wTf6?
R: 1. Tf1xTf6 c3-c2 2. Lf3-a8 c4-c3 3. 0-0 c5-c4 4. Lg2-f3 c6-c5 5. Lf1-g2 Kf4-g5,Kh4-g5 6. g2-g3+
play all play one stop play next play all
Hans-Jürgen Manthey: 1. Lg2-a8 c3-c2 2. Tf1xTf6 c4-c3 3. O-O ??? (Rochade nicht möglich wegen sTf6 !)

mögliche Lösung:
1. Tf1xTf6 c3-c2 2. Lf3-a8 c4-c3 3. O-O c5-c4 4. Lg2-f3 c6-c5 5. Lf1-g2 Kf4-g5 6. g2-g3+ Sg5-h7 7. Ld3-g6 Se4-g5 8. Th7-g7 Dg6-f7 9. f7-f8L Tf5-f6 10. Le5-h8 Lf8-h6 11. Lh4-e7 Dg5-g6 12. La7-e5 Tf6-f5 13. Lb8-a7 Th6-f6 14. Lf6-d8 Sc5-e4 15. Lb2-f6 Dd8-g5 16. Lf2-h4 Kg5-f4 17. f6-f7 Sa6-c5 18. Te7-h7 Th8-h6 19. f5-f6 Kh6-g5 20. La3-b2 Kg7-h6 21. Lf7-e8+ Kf6-g7 22. Lc1-a3 Kg7-f6 23. b7-b8L h7-h5 24. La7-f2 Kf6-g7 25. Lb8-a7 Kg7-f6 26. b6-b7 Kf6-g7 27. b7-b8L Kg7-f6 28. Te8-e7 Df6-d8 29. Ta8-e8 g5-g4 30. Le8-f7 f7xSe6 31. Sf4-e6+ Sb8-a6 32. Ta1-a8 Dd8-f6 33. e7-e8L Kf6-g7 34. e6-e7 Ke7-f6 35. b5-b6 g6-g5 36. b6-b7 g7-g6 37. c4xLb5 La6-b5 38. c2-c4 Lc8-a6 39. La6-d3 Ke8-e7 40. Lb7-a6 Ke7-e8 41. La8-b7 Ke8-e7 42. a7-a8L Ke7-e8 43. d5xTe6 Te3-e6 44. a6-a7 Ke8-e7 45. a5-a6 Ke7-e8 46. a4-a5 Ke8-e7 47. a2-a4 Ta3-e3 48. Sh3-f4 Ta8-a3 49. Sg1-h3 b7xSc6 50. Sa7-c6 Sc6-b8 51. Sb5xa7 e7xDd6 52. Dh6-d6 Sb8-c6 53. Dd2-h6 Sc6-b8 54. Dd1-d2 Sb8-c6 55. f4-f5 Sc6-b8 56. f2-f4 Sb8-c6 57. d4-d5 Sc6-b8 58. d2-d4 Sb8-c6 59. Sc3-b5 Sc6-b8 60. Sb1-c3 Sb8-c6 61. b5-b6 Sc6-b8 62. b4-b5 Sb8-c6 63. b2-b4 (2020-12-14)
more ...
comment
Keywords: Economy record (First move), Type A, First Move? (TxT), Castling in the retro play (wk), Non-standard material (LLLLL), Castling (wk)
Genre: Retro
FEN: B2BBBnB/2ppBqRn/3ppRBb/6kp/6p1/6P1/2p1P2P/6K1
Reprints: 5 Die Schwalbe Online 12/2020
Input: A.Buchanan, 2020-12-12
Last update: A.Buchanan, 2023-08-15 more...
21 - P1382908
Andrey Frolkin
Andrew Buchanan

6 Die Schwalbe 360-1, p. 738, 12/2020
P1382908
(11+14)
Erster Zug des wTf6?
R: 1. Tf1xDf6 b3xLc2 2. Le4-c2 and e.g. 2. ... c5-c4 3. Lf3-e4 c6-c5 4. 0-0 b4-b3 5. Lg2-f3 b5-b4 6. Lf1-g2 Kf4-g5 7. g2-g3+
play all play one stop play next play all
more ...
comment
Keywords: Economy record (First move), Type A, First Move? (TxD), Castling in the retro play (wk), Non-standard material (L), Castling (wk)
Genre: Retro
FEN: 3BBn2/2pRBrPn/3pQRrb/3pp1kp/2p3p1/6P1/2p1P2P/6K1
Reprints: 6 Die Schwalbe Online 12/2020
Input: A.Buchanan, 2020-12-12
Last update: A.Buchanan, 2023-08-15 more...
22 - P1382909
Andrey Frolkin
Andrew Buchanan

7 Die Schwalbe 360-1, p. 740, 12/2020
after Schwarzkopf, Dittmann & Murkisch
P1382909
(10+1)
Erster Zug des wTg1?
See P0007812.
Typo in published version, stip given incorrectly as "Last move?"
Henrik Juel: Last move was e2xDTLSPd3+
The top four pawns seem unnecessary (2020-12-12)
Henrik Juel: Sorry, the pawns are necessary to rule out Th1xg1 as first move (2020-12-12)
comment
Keywords: Economy record (First move), Type C, First Move? (T-)
Genre: Retro
FEN: 8/8/5PPP/8/2k4P/3P4/2K3PP/5BR1
Reprints: 7 Die Schwalbe Online 12/2020
Input: A.Buchanan, 2020-12-12
Last update: A.Buchanan, 2021-05-08 more...
23 - P1382910
Andrey Frolkin
Andrew Buchanan

8 Die Schwalbe 360-1, p. 740, 12/2020
P1382910
(16+6)
Erster Zug des wTf3?
R: 1. Tf1xBf3+! f4-f3 2. f3xBe4+ e5-e4 3. 0-0! Kg2-g3
play all play one stop play next play all
Henrik Juel: White captured TxPf3+, axbxcxd, bxcxd, cxd, fxPe, g5xh6, and h6xg7-g8=L
R: 1.Tf1xPf3+ f4-f3 2,f3xPe4+ e5-e4 3.0-0 Kg2-g3 (2020-12-12)
comment
Keywords: Economy record (First move), Type C, First Move? (TxB), Castling in the retro play (wk), Non-standard material (DTLL), Castling (wk)
Genre: Retro
FEN: 3N4/ppp4P/4NBpB/5BQp/4P1BR/R3QRk1/3PP3/6K1
Reprints: 8 Die Schwalbe Online 12/2020
Input: A.Buchanan, 2020-12-12
Last update: A.Buchanan, 2023-08-15 more...
24 - P1382911
Andrey Frolkin
Andrew Buchanan

9 Die Schwalbe 360-1, p. 740, 12/2020
P1382911
(12+6)
Erster Zug des wTd1?
R: 1. Tf1xSd1+! Sc3-d1 2. 0-0+!
play all play one stop play next play all
Henrik Juel: Black has played c3/a3xLb2-b1=T, earlier Kb4-a3-b2-b1, and still earlier Sb3xTa1
R: 1.Tf1xSd1+ Sc3-d1 2.0-0+ (2020-12-12)
Henrik Juel: A very impressive set of retros
Thanks for making them available, Andrew (2020-12-12)
A.Buchanan: Very welcome Henrik: thanks for your invaluable solving! (2020-12-13)
comment
Keywords: Economy record (First move), Type C, First Move? (TxS), Castling in the retro play (wk), Castling (wk)
Genre: Retro
FEN: N7/p1p5/8/8/8/PP6/qrPPPPPP/nNkR2K1
Reprints: 9 Die Schwalbe Online 12/2020
Input: A.Buchanan, 2020-12-12
Last update: A.Buchanan, 2023-08-15 more...
25 - P1382912
Andrey Frolkin
Andrew Buchanan

10 Die Schwalbe 360-1, p. 741, 12/2020
P1382912
(10+8)
Erster Zug des wTf8?
R: 1. Tf1xLf8+ & e.g. f4xSg3,f4x~g3 2. 0-0 e5xLf4,e5x~f4 3. Lf1-g2 d6xDe5,d6x~e5 4. g2xSh3,g2x~h3
and later White unpromotes via a7,c7&f7
play all play one stop play next play all
more ...
comment
Keywords: Economy record (First move), Type C, First Move? (TxL), Castling in the retro play (wk), Castling (wk)
Genre: Retro
FEN: R4R1k/1p1pp1pP/6pp/3N4/8/6pP/4P1BP/3B2K1
Reprints: 10 Die Schwalbe Online 12/2020
Input: A.Buchanan, 2020-12-12
Last update: A.Buchanan, 2023-08-15 more...
26 - P1382913
Andrey Frolkin
Andrew Buchanan

11 Die Schwalbe 360-1, p. 741, 12/2020
P1382913
(13+8)
First move of [wTh1]?
R: 1. ... g3xTf2+! 2. Tf1xTf2+! Tf3xTf2 (not 2.Tf1xSf2+?Sh1xTf2? because the second wT delivers illegal check) 3. 0-0! Dh2-h3 and e.g. 4. Tf1-f2 Lg1-e3 5. Sf2-d1 Ke5-f4 6. e3xBd4+
play all play one stop play next play all
Henrik Juel: R: 1... g3xTf2 2.Tf1xTf2 Tf3xTf2 3.0-0 Dh2-h3 and e.g.
4.Tf1-f2 Lg1-e3 5.Sf2-d1 Ke5-f4 6.e3xPd4+
The remaining capture by Black was f5xLg4
[Pa7] was captured by a white officer (2020-12-13)
comment
Keywords: Economy record (First move), Type C, First Move? (TxT), Castling in the retro play (wk), Castling (wk)
Genre: Retro
FEN: 8/1p5p/8/5PP1/3PNkpB/2PPb2q/P1pPPpQ1/3N2K1
Reprints: 11 Die Schwalbe Online 12/2020
Input: A.Buchanan, 2020-12-12
Last update: A.Buchanan, 2023-08-15 more...
27 - P1382914
Andrey Frolkin
Andrew Buchanan

12c Die Schwalbe 360-1, p. 741, 12/2020
P1382914
(16+8)
Erster Zug des wTf2?
R: 1. Tf1xDf2+ Dg3-f2+ 2. Lf2xBb6 b7-b6 3. 0-0! Dh2-g3
play all play one stop play next play all
Minor correction: sBd7->c6 wSb2->wL
Henrik Juel: Not R: 1.Tf1xDf2+ Dg3-f2+ 2.Lf2xPb6 b7-b6 3.0-0 Dh2-g3,
because White can no longer uncapture hxgxh
What was the intention? (2020-12-13)
A.Buchanan: Attempted repair to avoid accidentally retro-blocking c8 (2020-12-23)
Hans-Jürgen Manthey: mögliches Retrospiel: 1. Tf1xDf2# Dg3-f2 2. Lf2xb6+ b7-b6 3. O-O Dh2-g3 4. Se3-g2 Dg2-h2 5. Sc4-e3 Dh2-g2 6. Tg1-g4 Dg2-h2 7. Sa3-c4 Dh2-g2 8. g4-g5 Dg2-h2 9. Lb6-f2 Dh2-g2 10. Ld8-b6 Ke3-f3 11. d7-d8L Kd4-e3 12. Sc3-e2+ Kc5-d4 13. Le2-d1 Kd6-c5 14. Lf1-e2 Tf2-d2 15. Tg2-g1 Tf3-f2 16. Td2-g2 Se2-c1 17. Td1-d2 Te3-f3 18. Tb1-d1 Te6-e3 19. Lc1-b2 Th6-e6 20. f2-f4 Th8-h6 21. g2-g4 Sf4-e2 22. Se2-f3 Sd5-f4 23. Sg1-e2 Ke6-d6 24. Df4-h4 Ta8-h8 25. Da4xBf4 f5-f4 26. Da5-a4 Db8-h2 27. g4xTh5 h4-h3 28. b2-b3 Sb3-a1 29. Dd8xBa5 Sc5-b3 30. Df8-d8 a7-a5 31. Dh8xLf8 f7-f5 32. d6-d7 Kd7-e6 33. e5xBd6 Sf6-d5 34. Dh7-h8 Ke8-d7 35. De4-h7 Sg8-f6 36. Ta1-b1 Dd8-b8 37. Sb1-a3 Th8-h5 38. h3xLg4 h5-h4 39. h2-h3 Lc8-g4 40. De2-e4 h7-h5 41. e4-e5 c7-c6 42. d2-d3 Sa6-c5 43. Dd1-e2 d7-d6 46. e3-e4 Sb8-a6 47. e2-e3 (2020-12-25)
more ...
comment
Keywords: Economy record (First move), Type C, First Move? (TxD), Castling in the retro play (wk), Non-standard material (S), Castling (wk)
Genre: Retro
FEN: 8/4p1p1/1Bp5/6PP/5PRQ/1P1P1k1p/PBPrNRN1/n1nB2K1
Reprints: 12 Die Schwalbe Online 12/2020
Input: A.Buchanan, 2020-12-12
Last update: A.Buchanan, 2023-08-15 more...
28 - P1383249
Markus Johannes Ott
Andrew Buchanan

0 Die Schwalbe Online 12/2020
P1383249
(12+1)
Erster Zug des wBa3?
R: 1. b2xTa3 Tb3-a3,Tb3xSa3,Tb3xLa3
play all play one stop play next play all
Henrik Juel: White pawns captured all 15 missing black men, so last move was not, say, Kxc2
Last move was b2xTa3 allowing Tb3-a3 or Tb3xLSa3 as preceding move
So first move by Pa3 was just this: b2xTa3 (2020-12-23)
comment
Keywords: First Move? (BxT), Type A, Economy record (First move)
Genre: Retro
FEN: 8/1P6/2P5/PP1B4/kBP5/P2N4/P1K5/1N6
Input: A.Buchanan, 2020-12-23
Last update: A.Buchanan, 2020-12-26 more...
29 - P1385595
Andrew Buchanan
James Malcom
Hauke Reddmann
Michel Caillaud

MatPlus.net Forum 06/01/2021
in memory of Conrad Staugaard
P1385595
(14+13)
PG in 10.0
Staugaard castling
b) 1. d4 f5 2. Kd2 f4 3. Kd3 f3 4. Ke4 fxe2 5. Kf5 e1=T 6. De2 g5 7. Dxe7+ Sxe7+ 8. Kf6 Lg7+ 9. Kxg7 Sd5 10. Kxh8 0-0-0-0-0-0#
play all play one stop play next play all
Objective: Staugaard (Pam-Krabbé) castling as mating move.
Henrik Juel: solution
1. Bd2-d4 Bf7-f5 2. Ke1-d2 Bf5-f4 3. Kd2-d3 Bf4-f3
4. Kd3-e4 Bf3xe2 5. Ke4-f5 Be2-e1=T 6. Dd1-e2 Bg7-g5
7. De2xe7 Sg8xe7 8. Kf5-f6 Lf8-g7 9. Kf6xg7 Se7-d5
10. Kg7xh8 0-0-0-0-0-0#
First 9.5 moves are C+ Euclide 1.01
On behalf of the danish inventor of the looong castling, I thank for the dedication (2021-01-21)
James Malcom: After the 12.5 Andrew and I made, this turns out the fastest possible. 9.0 if you go non-unique. (2021-01-21)
A.Buchanan: Welcome, Henrik. Any idea what his initial "C." stands for? I couldn't find it online. (2021-01-22)
Henrik Juel: Unfortunately not, Andrew
In those days the first name was almost always abbreviated to an initial
Christian was a very common first name, but this was usually abbreviated to Chr.
So a wild guess is Carl, but it really could be anything starting with C
In a Skakbladet issue he is referred to as Direktør Staugaard, but this just means that he was in charge of a company (2021-01-22)
A.Buchanan: I have posted an English definition of the keyword. Please check if it suits. (2021-01-22)
Henrik Juel: Searching for direktør staugaard, randers (a danish city) yields
Conrad Staugaard (1852-1922)
so this is my best bet
Conrad Staugaard headed a bank in Randers, founded by him in 1891, but the CV in
http://historiskranders.dk/randers-biografier/
does not mention anything about playing chess or chess problems
Chess playing was very common in the middle class, so the biographer may not have found it worth mentioning (2021-01-22)
Henrik Juel: Your keyword definition seems fine,
except for the spelling of showcase... (2021-01-22)
A.Buchanan: Haha bingo: "Staugaard was a well-known and excellent chess-player, one of the many traits he had in common with Lewis Carroll". MMA SAM - Tidsskrift.dk. Googling for "Conrad Staugaard skak" brings up the pdf for Rama Sama. Please tell us what you make of it, Henrik :) In the mean time, I have updated the author info for him (2021-01-22)
Henrik Juel: Very good, Andrew
Ah, the joys of Google...
In the danish text there is not only your citation on chess, but also one on chess problems
There are also examples of Conrad's excentric behaviour, in line with him inventing the looong castling
That C. Staugaard might be Conrad's younger brother Carl (who surely also knew about chess) is ruled out by the fact that Carl emigrated to South America in 1901, because he experienced disappointments in his love live... (2021-01-22)
A.Buchanan: Yes it said he had lots of amazing concepts. The idea about the banner for his nursemaid to take his children for walks without getting her arms stretched is very funny. This is our man. He also seems to have been a good man, and an effective businessman. And loved enough by his friends for a 120 page book to have been commissioned in his memory. He is reminiscent of other children’s authors like Edward Lear, Dr Seuss, Heinrich Hoffmann... I’m so happy that this problem has brought him back to our awareness (2021-01-23)
comment
Keywords: Unique Proof Game, Staugaard castling, Prenix (t), Promotion (t), Castling as mating move, Economy record
Genre: Retro, Fairies
Computer test: HC+ the last move can only have been 0^6 discovering mate & the first 9.5 moves are C+ Euclide 1.01.
FEN: rnbq3K/ppppr2p/4k3/3n2p1/3P4/8/PPP2PPP/RNB2BNR
Input: A.Buchanan, 2021-01-21
Last update: Rainer Staudte, 2021-05-10 more...
30 - P1389375
Andrew Buchanan
MatPlus.net Forum 22/01/2021
P1389375
(14+14) C+
PG in 7.0
Staugaard castling
1. g3 e6 2. Lg2 e5 3. Lxb7 e4 4. Sf3 exf3 5. 0-0 fxe2 6. Lxa8 e1=T 7. Lg2 0-0-0-0-0-0
play all play one stop play next play all
Objective: fastest Staugaard (Pam-Krabbé) + another castling (happens to be kside)
A.Buchanan: Now we know more about Conrad Staugaard and his life, I enthusiastically agree with Henrik's earlier suggestion that we change this theme to be "Staugaard", which would also align with WinChloe. I can make necessary changes in PDB as a batch, and retain also "Pam-Krabbe" as a deprecated keyword, pointing to Staugaard. Pam & Krabbé are famous already, and only popularized Staugaard's funny idea. Any objections? (2021-05-08)
A.Buchanan: OK thank you: I've made the move. Please check the definitions, and let me know anything that needs changing (2021-05-09)
Henrik Juel: Very good, Andrew; the Staugaard fan club (both of us) thanks you
You might want to add that after a white Staugaard castling, wK is on e3 and promoted wR is on e2
I wonder whether the solution notation should be changed to 0-0-0-0-0 with 5 zeroes, so that the number of zeroes is one less than the length of the rook displacement for all three castlings (2021-05-09)
Henrik Juel: Forget my very last remark, please
Short and long castling has rook displacement = number of zeroes,
so Staugaard should remain with 6 zeroes, of course (2021-05-09)
A.Buchanan: Ok listed the target squares as requested. (2021-05-09)
A.Buchanan: Curious that this economy record must begin with a tempo move (2021-05-20)
A.Buchanan: Staugaard seems a much better basis than Chess960 for further generalization of castling. Basically move an unchecked royal king 2 unattacked square towards the rook, and the rook hops the otherside. This works whatever the gap between the two. This is more similar to rokagogo. (2021-05-21)
more ...
comment
Keywords: Unique Proof Game, Staugaard castling, Castling (2), Phoenix (t), Promotion (t), Tempo Loss, Economy record, Pure Round Trip (L3)
Genre: Retro, Fairies
Computer test: HC+ no orthodox solution in 7.0, and last Bl move can only have been 0^6 (else switchback, taking more than 7 Bl moves in total). Retracting 0^6, C+ Euclide 1.01 in 6.5
FEN: 1nbq1bnr/p1pprppp/4k3/8/8/6P1/PPPP1PBP/RNBQ1RK1
Input: A.Buchanan, 2021-05-08
Last update: Rainer Staudte, 2024-02-28 more...
31 - P1399677
Andrew Buchanan
Discord Chess Problems & Studies Server 06/03/2022
P1399677
(15+13) C+
PG in 10.0
Economy record for what effect?
1. e4 d6 2. e5 Lg4 3. e6 h5 4. exf7+ Kd7 5. Sc3 De8 6. fxe8=S h4 7. Sxg7 Th5 8. Sf5 Ke6 9. Sg3 Te5+
10. Sg3e2! (sic) Sg3-e2 Txe2+
play all play one stop play next play all
A.Buchanan: So what's the idea, Henrik? (2022-03-07)
Henrik Juel: If the proof game were in 11 moves, White could just capture [Dd8,Pf7,Pg7] with Sc3, and leave [Pe2] standing
But in 10 moves the tempo is wrong for this plan, and it is corrected by a roundtrip by [Pe2] lasting 9 moves
Very good (2022-03-07)
A.Buchanan: Thank you Henrik, but this is not the theme. Another incidental feature is that every piece which moves more than once has an interrupted journey. But what is the purpose of wSc3, for example? (2022-03-07)
Henrik Juel: White has to move after 4... Kd7, and 5.Sc3 seems safe (2022-03-07)
A.Buchanan: Hint: 5.Sa3 would not be thematic (2022-03-07)
Henrik Juel: I give up
What's the (big) idea? (2022-03-07)
A.Buchanan: See recent discussion at P1399601. This is a shortest SPG that forces a full designation for a source square (W10) and then restores to standard material. This is also maybe possible for Queen or Bishop, but requires two promotions so is longer. It’s never possible for rook. Currently this corner case breaks the PDB animation. (2022-03-07)
Henrik Juel: OK... Points for a well hidden idea, I guess
10. Sg3-e2 should work fine for the animation
And for retro play full notation is standard (even for me, although it took a long time) (2022-03-07)
more ...
comment
Keywords: Unique Proof Game, Economy record, Ceriani-Frolkin Theme (S), Prentos Theme (S), Pure Round Trip (9), Parity Argument, Tempo Loss
Genre: Retro
Computer test: C++ Euclide 1.01
FEN: rn3bn1/ppp1p3/3pk3/8/6bp/2N5/PPPPrPPP/R1BQKBNR
Input: A.Buchanan, 2022-03-07
Last update: A.Buchanan, 2022-03-07 more...
32 - P1405296
Andrew Buchanan
Andrey Frolkin

AA042 The Hopper Magazine I02 23/06/2022
P1405296
(13+9)
First move of wRb2?
R: 1. g2xBh3 h4-h3 2. Te2-b2 h5-h4 3. 0-0-0-0-0-0 h6-h5 4. e7-e8=T h7-h6 5. f6xDe7,f6xL/Se7
play all play one stop play next play all
https://drive.google.com/file/d/1e6e77hAXxKajrJdu5Rd3hdsA0k3QSH9D/view
Thanks to Mario Richter for finding a bug, now fixed by switching pawns g-h files
more ...
comment
Keywords: Type A, First Move?, Staugaard castling, Economy record
Genre: Retro, Fairies
FEN: n2N4/PPkp1pp1/PNBp4/Bp1p4/1p6/4K2P/PR5P/7R
Input: James Malcom, 2022-10-20
Last update: A.Buchanan, 2023-07-27 more...
33 - P1409983
Andrey Frolkin
Werner Keym

1.67 Eigenartige Schachprobleme , p. 196, 2010
P1409983
(10+2)
Letzter Zug?
R: 1. g3xBh4 h5-h4 and e.g. 2. Kf4-g5 Kh4-h3
play all play one stop play next play all
Compare P0000999 with more non-standard material
more ...
comment
Keywords: Economy record (Last Move? Type A), Last Move? (BxB), Non-standard material (L), Type A, Type B (a fortiori), Economy record (Last Move? Type B), Minimal
Genre: Retro
FEN: 8/1p5P/6PP/5BK1/6PP/5B1k/6NP/8
Input: A.Buchanan, 2023-05-28
Last update: A.Buchanan, 2023-05-31 more...
34 - P1409984
Theophilus Harding Willcocks
1.68 Eigenartige Schachprobleme , p. 196, 2010
P1409984
(3+9)
Letzter Zug?
R: 1. a7xTb8=L h7-h6 2. a6-a7 Ka7-a8 3. a5-a6 and e.g. 3. ... Ta8-b8 4. Tb8-c8
play all play one stop play next play all
Compare P0000957 with non-standard material.
more ...
comment
Keywords: Economy record (Last Move? Type A), Type A, Last Move? (BxT=L), Promotion (L)
Genre: Retro
FEN: kBRn4/1pKppp2/1pp4p/8/8/8/8/8
Input: A.Buchanan, 2023-05-28
Last update: A.Buchanan, 2023-05-31 more...
35 - P1410903
Mu-Tsun Tsai
Dream Yeh

MatPlus.net Forum 14/07/2023
P1410903
(16+2)
What is curious about this position?
R: 1. d5xe6ep# e7-e5 2. d4-d5+
play all play one stop play next play all
Mu-Tsun Tsai: Previous record is P1410861 (2023-07-14)
Mu-Tsun Tsai: Original design was 8/2N5/3PPkPR/rP6/B5PP/8/3PPN2/B2RqQK1, but that leads to a surprising cook: remove both d2 and f2, and retract -1. fxe6ep# e7 -2. Rd4+! (2023-07-14)
comment
Keywords: Economy record, En passant, En passant in the retro play, Last Moves? (3), Minimal
Genre: Retro, Fairies
FEN: 3Q1R2/2N1PP2/5k2/7P/2P4P/6N1/3PPP2/B2BqRK1
Input: James Malcom, 2023-07-14
Last update: James Malcom, 2023-09-09 more...
36 - P1411660
Andrew Buchanan
Retudin
James Malcom

puzzling.stackexchange.com 01/08/2023
P1411660
(8+5) C+
s#5
1. b4 h5 2. b5 h4 3. b6 h3 4. b7 h2 5. b8=B Lxg7#
play all play one stop play next play all
more ...
comment
Keywords: Dummy Pawn, Golden Age (Dummy Pawn), Economy record (dummy pawn excelsior), Excelsior, Non-standard material (TL)
Genre: s#
Computer test: C+ Popeye v4.87
FEN: 2R1R2b/3kp1R1/7p/2P5/8/8/BP6/KB5p
Input: A.Buchanan, 2023-08-08
Last update: A.Buchanan, 2023-12-18 more...
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The problems of this query have been registered by the following contributors:

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