Die Schwalbe

33 problem(s) found in 1985 milliseconds (displaying 33 problem(s)). [COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND K='Rochadematt'] [download as LaTeX]

1 - P0008780
Valery Liskovets
7162 feenschach 123 01-06/1997
P0008780
(3+4)
h#2 AP(PF)
Pièces rétro-volages
VL: Solution:
1.Rg2=wR Rb6=wR!! 2.Re8=bR! 0-0#! (2... Rf1#??)
2.Ra(c)8=wR??

Here only one w rook is volage since they both stand on light squares
of ODD ranks: any promotee had to visit a square of the opposite
colour at least once in order to arrive from the 8th rank! Similarly,
only one bl rook is volage (EVEN ranks). By the AP logic, we have a
right to justify the 1st W's move by subsequent castling, which shows
that it is Rh1 that is volage. Bl rooks play by the post factum
(subordination) logic: the first one turns out volage.

Cooked (feenschach, 126): 1.Ra2(Rc2,Rb3...)=wR Rh7+ 2.Kf8 Ra8#
Correction: Rh8- e8. (2002-04-05)
VL: Correction (H.130): Rh8 to d8 (rather than to the light square e8). (2021-02-12)
A.Buchanan: shifted sT to d8 as per request (2021-02-12)
comment
Keywords: a posteriori (AP), Retro-volages, Post Factum (PF), Miniature, Castling, Castling as mating move
Genre: Retro, Fairies, h#
FEN: 3r4/4pk2/8/8/8/8/1r6/1R2K2R
Input: Gerd Wilts, 1997-06-16
Last update: James Malcom, 2021-02-12 more...
2 - P1020144
Josef Kling
23 The Chess Euclid 1849
P1020144
(6+6)
#2
1. axb6ep+ Kb1 2. 0-0#
1. ... Da7 2. Kf2#
play all play one stop play next play all
in 'Le Pion' fälschlich wBa4 ("1 - R 1 R ... 5 - P 4 TD ...")

Nach heutigen Konventionen ist der Ep-Schlag unzulässig, man beachte aber:
Kling im 'Chess Euclid' zur Intention dieser Aufgabe: "This problem I have compossed expressly to shew the error the modern composers of problems have committed, in introducing the system of castling in the ends of games. In this problem I consider I have as good a reason to say that Black has just moved his Q. Kt. P. [b5] two squares as that White has not moved his K. R. or K."
James Malcom: I found this hidden ancient, another that rode the rails of the unjustified en passant key. (2020-12-28)
comment
Keywords: Brian Stephenson Collection (4985), En passant as key, Castling (wk), Joke, En passant, Castling as mating move
Genre: 2#
FEN: R7/7q/7r/Pp6/5p1r/7P/4Q3/k3K2R
Reprints: 458 Dubuque Chess Journal 35 01/1873
P10 Le Pion 01/05/1873
Input: Brian Stephenson, 2004-08-12
Last update: James Malcom, 2021-07-17 more...
3 - P1277303
Tim Krabbé
Schaakbulletin 1972
P1277303
(9+6) C+
#3
1. e7! droht 2. e8=D,T+ Kd3,Kxf3 3. De2#,0-0#,0-0-0#
1. ... Kxf3 2. e8=T! d4 3. 0-0#
2. ... Kg2 3. 0-0-0-0-0-0#!
2. e8=D? Kg2!
1. ... Kd3 2. e8=D gxf3 3. 0-0-0#
2. ... d4 3. De4#,De2#,0-0-0#
1. ... gxf3 2. e8=D,T+ Kd3 3. 0-0-0#
play all play one stop play next play all
Die Idee dieser "Pam-Krabbe-Rochade" ist vorweggenommen durch P1277302 - die Aufgabe hat aber wegen der in ihr vereinigten drei verschiedenen Rochaden durchaus einen eigenen Wert.
A.Buchanan: I agree that Pam has the idea before Krabbé, but it’s a theme round which many problems can be composed, so I will remove the “anticipated” keyword which is too harsh in its PDB usage. Given that the phrasing of the Laws has now been cleaned up this is an example of the suggested “Principle of Maximal Soundness” which states that a composition is as sound as its maximum value over its lifetime. (2019-12-24)
Henrik Juel: The two dutchmen cooperated in 1972: Pam re-discovered the idea, and Krabbe made this fine joke problem
But the idea was first shown in Skakbladet 1907 by the danish composer C. Staugaard, P1277302
So it ought to be called Staugaard-Rochade, but as Pam-Krabbe-Rochade is already established, I suggest Staugaard-Pam-Krabbe-Rochade
This messy terminology is yet another reason why themes ought not be named after authors, but human vanity has prevented a rational approach... (2019-12-24)
A.Buchanan: "There's nothing new under the sun" was said by many people before Ecclesiastes. This world is not a just one: many things get named after people who weren't their originators or discoverers. It also a huge pain to change the names of stuff, and I wouldn't embark on it unless it's *really* necessary. So it's it's Pam-Krabbe for me, with a touch of the forelock to Staugaard.

I think it's cool that stuff gets named after people though, because it's more personalized, and introduces new distinctive character strings to the universe of names. It would be a huge mistake imho to try to name everything by a clumsy functional description of its content. "Name" & "description" are rightly different things. (2021-01-04)
A.Buchanan: WinChloe hasn't got P-K but it has got Rokagogo, which can be looser. Here's its (edited) solution, where I have asked for variations without threats:
1.é7!
1…g×f3 2.é8=D,T+ Rd3 3.0-0-0‡
1…d4 2.é8=D+ Rd3/R×f3 3.0-0-0,Dé2,Dé4/0-0,Dé2‡
2.é8=T+ Rd3/R×f3 3.0-0-0/0-0‡
1…Rd3 2.é8=D g×f3/Rç2/d4 3.0-0-0/Dé2/0-0-0,Dé2,Dé4‡
2.é8=T g×f3,d4/Rç2 3.0-0-0/0-0-0-0-0-0‡
1…R×f3 2.é8=T d4/Rg2 3.0-0/0-0-0-0-0-0‡
I think Rokagogo is representing P-K faithfully here. (2021-01-05)
James Malcom: Sounds great! It's more an "analogy" though at the moment, as it isn't perfect, since Rokagogo allows for free range castling. Perhaps testing a few more will be needed, if not all? (2021-01-06)
A.Buchanan: In this #3 Black cannot rokagogo. So the condition is a strict improvement of whites capabilities over P-K. The fact that only P-K appears in the full solution and no other rokagogo I think proves that this problem is sound under P-K. So in this case, I don’t think it’s an “analogy”: Wise to be careful though, as we are being in the P-K proof games too (2021-01-06)
Henrik Juel: Another way of partial testing is to check that Popeye without any condition reports no solution, and then check the intended Staugaard castling variation by hand (2021-01-06)
A.Buchanan: @Henrik, and yes this is what had been done in the past. I hope I've explained why for this example, WinChloe Rokagogo + reflecting that Black has no rooks or prospect of any means we can be very confident that it is sound. I hope to test all the P-Ks progressively, and if there are any where I don't think the current WinChloe is good enough, I will then be able to lobby to Christian to get P-K added. There are some proof games in MatPlus right now (http://matplus.net/start.php?px=1609929841&app=forum&act=posts&fid=anti&tid=2302&pid=20388#n20388) where again one needs to think as to whether we can be sure that it's sound. By the way, I have dedicated the best to Staugaard out of respect. There is a similar issue that Dr Robert Norman had the idea that ended being called Bosma (after someone who never managed to compose a sound problem of that form, and denied the critical KvK duel aspect which makes the condition so interesting). But successfully renaming things is very hard: and I am ok these are called Pam-Krabbe & Bosma. We can/should honour Staugaard & Norman in other ways. (2021-01-06)
James Malcom: Yes, you are right. I just reread the definition of Rokagogo, and the king can only move two spaces in any direction anyway. So, at e1/e8, and the promoted rook at the other end, e3/e6 is the only place for the king to castle to. So, unless we are dealing with multiple rooks on the board, basically any PK problem should be C+ by Rokagogo. (2021-01-06)
comment
Keywords: Castling (wk, wl), Joke, Staugaard castling, under-promotion (T), Promotion (D,T), Castling as mating move
Genre: 3#
Computer test: C+ WinChloe if one accepts Rokagogo as a model of Pam-Krabbe, which I think is valid here.
FEN: 8/8/4P3/3p4/2p3p1/1pP1kPPp/1P5P/R3K2R
Reprints: 12 Chess Curiosities [Krabbé] 1 1987
Input: Mario Richter, 2013-09-05
Last update: James Malcom, 2021-01-06 more...
4 - P1370911
James Malcom
Andrew Buchanan

(4) MatPlus.net Forum Retro/Math 21/12/2019
P1370911
(12+14)
PG in 12.5
(-:
1. e4 d5 2. e5 Dd6 3. exd6 Kd7 4. dxe7 Kc6 5. Lb5+ Kxb5 6. c4+ Kxc4 7. e8=T Kd3 8. Df3+ Kc2 9. d3 Lh3 10. Ld2 Lxg2 11. Lb4 Lxh1 12. Sc3 Lg2 13. 0-0-0-0-0-0#
play all play one stop play next play all
http://matplus.net/start.php?px=1609818957&app=forum&act=posts&fid=xshowr&tid=2402&pid=20379#n20379
Objective: Staugaard (Pam-Krabbé) castling as mating move.
Henrik Juel: Searching for 'joke' and 'castling' gives many hits in the PDB, but none in a proof game, so this may be a first
The search also revealed that the joke was invented by a fellow Dane in 1907, P1277302, and re-discovered in 1972, P1277303 (2019-12-23)
A.Buchanan: I don't think it's practical to run a proof game of this length in WinChloe with rockagogo condition. The best line of attack is to focus on the last move. We know there is no orthodox solution, so any solution must include P-M castling. If this was the last move, then we know there is a unique solution for the first 12.0 moves, and we are home. The other candidates for last move are 13. d2-d3 (so wLb4 is promoted: too many Wh moves required) or 13.Te1*e2 (all 13 Wh moves spoken for implies other pieces were all captured on their starting square, but it's not so quick to be able to dismiss this alternative candidate). Does anyone have a quick proof that last move was not 13.Te1-(x)e2# (2021-01-06)
James Malcom: Andrew, the proof is simple enough, actually.

Since we know PK castling must have taken place, let's count up how many moves we know must have happened from the diagram at a bare minimum: 1 queen move+2 bishops moves+1 knight move+6 pawn moves divided between 5 for wPe2 and 1 for wBd3+1 king move. This takes away 11 out of 13 possible White moves. There are 2 left over, enough for Re2 to e1 back to e2.

However, there is a major flaw-how did White's c2 pawn and f1 bishops get captured then, with neither of them moving by the above argument? The h1 rook and g2 pawn were of course taken by Black's bishop.

Black's king and bishops literally have no time, in 12 Black moves as a limit, to capture them AND get in position, along with the pawn and queen move.

There, the White c2 pawn f1 pawn did move, leaving no time for a rook switchback between e1 and e2,

So the PG is C+ after all. (2021-01-06)
James Malcom: Furthermore, with the above arguments, the wPc2 couldn't have promoted, as there is then no time to capture wBe2, nor could wPe2 have time to move and be captured to let the Black king pass through. (2021-01-07)
James Malcom: Lastly, the White pieces couldn't have been captured at home due to simple math. for Black, king moves+1 pawn move+at least 3 moves to take Pg2 & Ph1 takes 3 moves=10/12 Black moves. This leaves nowhere enough time to capture the Pc2 and Bf1 at home. (2021-01-07)
A.Buchanan: I never doubted that a careful manual retro argument for soundness could be made. But if this implies that the problem is C+ or HC+, then we could reclassify thousands of existing retros as “C+“. I am ok to bend the current notion of C+ a little to include “thinking” but this subjectively goes too far for me. And what to be gain by obsessively classifying this (superseded) problem as “C+”? There is no benefit.
One root issue is that we are missing an overall concept of soundness in PDB. I have a draft email for Gerd about this based on the Codex which is quite good in this area, but I have so many other things to do too. Maybe I could post it in MatPlus but then I fear many hobbyhorses would be taken out of their stables for a gallop: (2021-01-07)
A.Buchanan: I have removed C+ sticker from this one, not to prejudge the issue, but so that by querying for k
='pam' and not cplus, one can see all 5 P-K problems where there are issues. All the other 14 I think get a clean bill of health: WinChloe rokagogo is sufficient to genuinely validate: all their C+ stickers are 100% merited. Happy if we put back C+ on this one, once we decide what "C+" means. (2021-01-07)
more ...
comment
Keywords: Unique Proof Game, Staugaard castling, Joke, Prenix, Promotion (T), Castling as mating move, Superseded by (P1385595)
Genre: Retro, Fairies
Computer test: C+ Natch 3.1 has no solutions in 12.5 moves & 1 solution for first 12.0 moves. (H.Juel)
FEN: rn3bnr/ppp2ppp/8/3p4/1B6/2NPKQ2/PPk1RPbP/R5N1
Input: A.Buchanan, 2019-12-23
Last update: A.Buchanan, 2021-05-08 more...
5 - P1373235
Samuel Loyd
E50 The New York Clipper , p. 390, 28/03/1857
P1373235
(7+10) cooked
#5
1. Dxa3+! Kc2 2. Dxb3+ Txb3 3. Se3+ fxe3 4. Lxd3+ Kxd3 5. 0-0-0#
play all play one stop play next play all
Cook: Dual
2. Ta2+ Tb2 3. Txb2+ Kc1 4. Ta2+,Th2+,Tg2+,Tf2+,Te2+,Td2 Kb1 5. Sxc3#
"Trick 'o the trade.".
James Malcom: This is the oldest known problem that features the Belen theme. (2020-09-20)
comment
Keywords: Capture key, Castling as mating move (wl), Checking key, Sacrifice of white pieces, Belen Theme
Genre: n#
FEN: 3b4/8/7r/6q1/R4p2/nnpb4/Q7/RrkNKBN1
Reprints: (5) MatPlus.net Forum 3/10/2019
Input: Felber, Volker, 2020-03-08
Last update: James Malcom, 2020-09-21 more...
6 - P1374103
James Malcom
MatPlus.net Forum 26/12/2019
“A Tripley For The Holidays”
P1374103
(7+12) C+
h#3
(-:
3.1
1) 1. Se7 Lxh4 2. 0-0 Lxf6 3. Tf7 Th8#

2) 1. La7 b6 2. 0-0-0 bxa7 3. Td7 a8=D#

3) 1. e1=T Lf1 2. 0-0-0-0-0-0! Lxd3 3. Kd5 Lc4#
play all play one stop play next play all
All three castlings in a helpmate on the same move. Compare to P1227518.

http://matplus.net/start.php?px=1609949816&app=forum&act=posts&fid=gen&tid=2409
A.Buchanan: WinChloe rokagogo only finds the intended solutions, no real P-M duals and no fake rokagogo duals:
1.Cé7 F×h4 2.Rg8(Tf8) F×f6 3.Tf7 Th8‡
1.é1=T Ff1 2.Ré6(Té7) F×d3 3.Rd5 Fç4‡
1.Fa7 b6 2.Rç8(Td8) b×a7 3.Td7 a8=D‡ (2021-01-06)
more ...
comment
Keywords: Joke, Staugaard castling, Castling, Promotion in the mating move (D), under-promotion key (T), Castling as mating move
Genre: h#
Computer test: Henrik Juel: Solutions 1 and 2 are C+ by Popeye 4.61 C+ WinChloe Rokagogo: no real P-M duals and no fake Rokagogo duals
FEN: rb2k1nr/2p5/3p1p2/1P3p2/5P1p/1K1p1P1R/4pBB1/8
Input: James Malcom, 2020-04-02
Last update: James Malcom, 2021-01-06 more...
7 - P1374801
Wladimir G. Schkryl
9 Polshisni sa Konja 2005
P1374801
(4+2) cooked
h#2
1. Ka2 e8=T! 2. a3 0-0-0-0-0-0#!
play all play one stop play next play all
Page 123, No. 9: http://superproblem.ru/doc/E-books/Skryl-2013.pdf

http://superproblem.ru/archive/raznoe/Skryl-umor-h2-1.gif
Cook: 1. Kb2/Ka2 e8=T 2. Kc1,Kb1,Kxa1/a3,Kb1,Kxa1 0-0-0-0-0-0#
Henrik Juel: Popeye 4.61 found no non-joke solutions (2020-04-18)
A.Buchanan: What's the intention here? There are 6 variants under P-K, and any dual is fatal for P-K soundness. (2021-01-07)
James Malcom: A weird fallacy indeed. More information is in lacking, however. (2021-01-08)
more ...
comment
Keywords: Joke, Staugaard castling, under-promotion (T), Miniature, Castling as mating move, Minimal
Genre: 2#
Computer test: WinChloe rokagogo sufficient to identify 6 solutions with P-K, so looks cooked: 1.Rb2 é8=T 2.Rç1 Ré3(Té2)‡ 1.Rb2 é8=T 2.R×a1 Ré3(Té2)‡ 1.Rb2 é8=T 2.Rb1 Ré3(Té2)‡ 1.Ra2 é8=T 2.a3 Ré3(Té2)‡ 1.Ra2 é8=T 2.Rb1 Ré3(Té2)‡ 1.Ra2 é8=T 2.R×a1 Ré3(Té2)‡
FEN: 8/4P3/8/8/p7/k7/8/N3K1R1
Input: James Malcom, 2020-04-18
Last update: A.Buchanan, 2021-01-07 more...
8 - P1380098
Wladimir Naef
Basler Nachrichten 1955
P1380098
(5+2) C+
h#2
1. Kc2 Sbc3 2. Kd3 0-0-0#
play all play one stop play next play all
more ...
comment
Keywords: Belen Theme, Castling as mating move
Genre: h#
Computer test: Popeye 4.61
FEN: 8/8/8/3N4/2q5/P7/8/RNk1K3
Input: James Malcom, 2020-09-20
Last update: Alfred Pfeiffer, 2020-09-22 more...
9 - P1380100
Markus Wettstein
(2856) Neue Zürcher Zeitung 16/6/1968
P1380100
(10+2) C+
#4
1. Sa4! f3 2. La2+ Kc2 3. Sdc3 Kxd3 4. 0-0-0#
play all play one stop play next play all
Krabbe's Reprint: "The search is over - as was to be expected, Hanspeter Suwe found a real anticipation in his archives.

(diagram)

Suwe adds he does not know the exact date of publication (judging from the photo above, it's a pity that it couldn't be Belén's birthday) and nothing about the author. "It is the same matrix which has also been found by Pérez Carballo and McDowell. The problem by the last one is the best: very good construction with a fantastic key move: 1.Nd1!, a so called AZE (means Anti-Ziel-Element), a term for such a strategic move, created by the Austrian composer Helmut Zajic."
Suwe thinks there might be even older examples and will continue to look for them.

With this information, McDowell found Wettstein's (a Swiss) problem in a book Kunstschach in der Schweiz / Les Echecs artistiques en Suisse" by Hans Henneberger (1980), who comments: "A chess riddle in which one really wouldn't expect castling!"
James Malcom: The first known correct Belen theme directmate. (2020-09-20)
more ...
comment
Keywords: Belen Theme, Castling as mating move
Genre: n#
Computer test: Popeye 4.61
FEN: 8/8/8/1P6/3P1p2/P2P4/1N3P2/RBkNK3
Reprints: 253 Tim Krabbé's Website 28/7/2004
Input: James Malcom, 2020-09-20
Last update: Alfred Pfeiffer, 2020-09-22 more...
10 - P1380101
Milos Marysko
Die Schwalbe 1960
P1380101
(8+6)
h#4
1. Kxc2+ Ld1+ 2. Kxd3 b4 3. Txb4 Lf3 4. Tc4 0-0-0#
3. ... Lb3 4. Txe4 Td1#
2. ... Kf1 3. Txb3 Lxb3 4. Kd2 Td1#
play all play one stop play next play all
Henrik Juel: This looks like a cooked h# (2020-09-20)
James Malcom: Probably, but I don't know whether it's a 3.1 helpmate or not, as I got this from YACPDB. Someone would have to check the original source. (2020-09-20)
comment
Keywords: Belen Theme (Normal & Anti-), Castling as mating move, Checking key
Genre: h#
FEN: 8/8/8/4p3/4P3/pPpPp3/P1P1B3/Rrk1K3
Input: James Malcom, 2020-09-20
Last update: Alfred Pfeiffer, 2020-09-22 more...
11 - P1380103
Manuel Pérez Carballo
253 Tim Krabbé's Website 17/7/2004
"The Belén Theme"
Gewidmet Belén (His partner)
P1380103
(8+5)
#4
1. Sxa4! droht 2. Sbc3+ Tb1 3. Txb1
1. ... Txc4 2. Sbc3+ Kc2 3. Ld3+ Kxd3 4. 0-0-0#
2. ... Tb1 3. Ld3 Txa1 4. Se2#
1. ... Txb1 2. Ld3 Txa1 3. Txc2+ Kb1 4. Sc3#
play all play one stop play next play all
"This problem introduces a theme which, to the composer's and my knowledge and surprise, seems not to have been thought of before. Pérez Carballo (a Spanish chess player of around 2150 living in Glasgow - one of the first things he did there was to go to a library where he could see with his own eyes Barbier's 1895 Glasgow Weekly Citizen articles in which the Saavedra position was discovered - "I was almost crying of excitement as I turned the pages of the thick bound volumes until I got to the very colums") always felt attracted to the unusual in chess. He didn't play the Spanish but the Portuguese (1.e4 e5 2.Bb5) and composed some problems and studies with castling and en passant ideas, but this is his first publication.
The idea for this problem had "haunted him for almost a decade", but the best he had been able to come up with was a version with an inexcusably bad key; the capture of a Queen. Then one weekend, he decided to give it one last, all-out try. When he went to bed early Sunday morning, nothing had worked but after waking up, he realised he had seen the solution in a dream. It still needed a finishing touch - the a4 and b4 pawns had been absent - but when he added them, it worked.

1.Nxa4 threatening 2.Nbc3+ and mate. Black has two defences:
a) 1...Rxb1 when 2.Bd3 Rxa1 3.Rxc2+ Kb1 4.Nc3 is mate, and
b) 1...Rxc4 2.Nbc3+ Kc2 (2...Rb1 3.Bd3 Rxa1 4.Ne2 mate) 3.Bd3+ Kxd3 4.O-O-O mate

The switchback mate 4.Nc3 in variation a) and the model mate 4.Ne2 in b) are nice, but 4.O-O-O mate in b) is the central idea of the Belén Theme: in a direct-mate, the Black King starts at c1 and is mated by O-O-O.

But why Belén theme? Pérez Carballo sent me his problem on 17 July, because on that day it was 5 years ago he met his "other passion outside chess", his partner Belén - the Spanish form of Bethlehem. He dedicates his problem to her, and names the theme after her, wondering if ever before a chess theme has been named after a loved one.

So far so good, but there could be two reasons he's holding his breath now. A reader (Hanspeter Suwe for instance, the editor of the castling magazine König & Turm) might know of an earlier Belén problem - and a composer might be inspired to make a better Belén, either improving on this setting, or creating an new one. Pérez Carballo does realize his problem is not the perfect rendering of the theme. For one thing, the ideal Belén would be a three-mover. The flight-taking key is not very good; a black piece on b1 would conceal the solution better (but then it would have to be a four-mover) and he did not manage the Meredith form - 12 pieces or less. But the Pa3 is needed to stop 1.Na3+; the Pa4 is needed to stop 1.Nd2+ Kb2 2.Rb1+ Kxa3 3.Rxb3 mate, and the Pb4 is needed to stop 1.Nd2+ Kb2 2.Rb1+ Kxa3 3.Rxa4 mate.

But he did create the first Belén - nobody can take that from him."
James Malcom: This is the problem on Tim Krabbe's site that sparked the world wide chess phenomenon known as the Belen Theme and the problem that named the theme-https://timkr.home.xs4all.nl/chess2/diary13txt.htm (2020-09-20)
Henrik Juel: The thematic variation is correct
1.Sc3*a4 Rc2*c4 2.Sb1-c3+ Kc1-c2 3.Be2-d3+ Kc2*d3 4.0-0-0#
But the problem is very damaged by duals in other variations, e.g.
1... Tcc3 2.Ld1,Ld3,Sd2+,Sxc3+ (2020-09-20)
comment
Keywords: Belen Theme, Castling as mating move, Capture key
Genre: n#
FEN: 8/8/8/8/pPR5/PrN1p3/2r1B3/RNk1K3
Input: James Malcom, 2020-09-20
Last update: Alfred Pfeiffer, 2020-09-22 more...
12 - P1380104
Michael McDowell
253 Tim Krabbé's Website 26/7/2004
P1380104
(9+1) C+
#3
1. c4! Kc2 2. Sbc3 Kd3 3. 0-0-0#
play all play one stop play next play all
Within hours, the English problemist Michael McDowell sent me a Belén problem that was both a Meredith and a three-mover.

(diagram)

"Or start Na4 on c3 for a 9-piece setting if you don't mind a flight-taking key," he added. Man for man, that setting was later independently also sent to me by Joshua Green. (The key is then 1.Na4)." [P1380105]
more ...
comment
Keywords: Belen Theme, Rex solus (s), Castling as mating move
Genre: 3#
Computer test: Popeye 4.61
FEN: 8/8/8/8/N7/PPP5/P4P2/RNk1K3
Input: James Malcom, 2020-09-20
Last update: Alfred Pfeiffer, 2020-09-22 more...
13 - P1380105
Joshua Green
253 Tim Krabbé's Website 26/7/2004
P1380105
(8+1) C+
#3
1. Sa4! Kc2 2. Sbc3 Kd3 3. 0-0-0#
play all play one stop play next play all
[ P1380104] "Or start Na4 on c3 for a 9-piece setting if you don't mind a flight-taking key," he added. Man for man, that setting was later independently also sent to me by Joshua Green. (The key is then 1.Na4)."
A.Buchanan: The castling & e.p. conventions are not inherently retro, although they may combine with other content. We don't enough about the history of the game, so the convention simply decides (2020-09-21)
James Malcom: Wrong problem to comment on, Andrew? (2020-09-21)
A.Buchanan: Hi James - I should have said: this problem was marked Retro not #3, so I changed the genre. My earlier comment is an explanation (2020-09-22)
more ...
comment
Keywords: Belen Theme, Rex solus (s), Flight taking, Castling as mating move
Genre: 3#
Computer test: Popeye 4.61
FEN: 8/8/8/8/8/PPN5/P4P2/RNk1K3
Input: James Malcom, 2020-09-20
Last update: Alfred Pfeiffer, 2020-09-22 more...
14 - P1380106
Michael McDowell
253 Tim Krabbé's Website 26/07/2004
P1380106
(6+1) C+
#3
1. La2+! Kc2 2. Sg3 Kxd3 3. 0-0-0#
play all play one stop play next play all
"Just a few minutes later, McDowell sent me this miniature setting, for the price of a checking key."
more ...
comment
Keywords: Belen Theme, Rex solus (s), Checking key, Flight giving key, Stalemate dissolution, Castling as mating move
Genre: 3#
Computer test: Popeye 4.61
FEN: 8/8/8/8/3B4/3P4/8/RBk1K2N
Input: James Malcom, 2020-09-20
Last update: Felber, Volker, 2020-10-12 more...
15 - P1380107
Manuel Pérez Carballo
253 Tim Krabbé's Website 27/7/2004
P1380107
(9+5) C+
#4
1. Sc3! Kc2 2. Sxa2 Lxa2 3. Lxa2 Kd3 4. 0-0-0#
1. ... Kxb2 2. Sxb1+ Kc1,Kc2 3. Sa3#
play all play one stop play next play all
" I may, through lack of attention, have created a awkward problem for the composers. They do care a lot, and rightly so, about precedence, anticipation, novelty of idea & setting.
Between sending me his first Belén problem on 17 July and my publication of it on 24 July, Pérez Carballo also sent me a gamefile with games of his, and at the end two "Belén Theme" four-movers, the second being a new version which I must admit did not really take root in my mind.
Right after my publication of the Belén problem, Michael McDowell sent me the two three-movers above and the next day, the four-move version with 1.Nd1!
As it turns out now however, that other four-mover in Pérez Carballo's gamefile anticipates, to a degree, McDowell's 1.Nd1 four-mover.

(diagram)

Largely the same setting and the same play. There can be no doubt that McDowell's problem is better (at the Chess Problem Discussion Board Pérez Carballo recognizes that) but there is also no doubt Pérez Carballo had some of the ideas first - of course without McDowell knowing that. Still, an anticipation. But: is an anticipation an anticipation without publication? Have I wronged somebody and if so, whom?
I'm afraid all I can do is turn beet-red, and thank both composers for their work. The Belén Theme Story amounts to an interesting insight into the development of a problem idea."
more ...
comment
Keywords: Belen Theme, Flight giving key, Castling as mating move
Genre: n#
Computer test: Popeye 4.61
FEN: 7B/8/8/8/2B1p3/4Pp2/pP3P2/RbkNK1N1
Input: James Malcom, 2020-09-20
Last update: Alfred Pfeiffer, 2020-09-22 more...
16 - P1380108
Michael McDowell
253 Tim Krabbé's Website 26/7/2004
P1380108
(8+2) C+
#4
1. Sd1! Kc2 2. Sdc3 Lxa2 3. Lxa2 Kd3 4. 0-0-0#
2. ... Kc1 3. Sxb1 Kc2 4. Sa3#
play all play one stop play next play all
"And next morning, he sent me "something that looks like a proper chess problem.

(diagram)

1.Nd1! Not only a black piece on b1, but also a key which fills up all the castling squares. 1...Kc2 2.Ndc3 Bxa2 (Kc1 3.Nxb1 Kc2 4.Na3 mate) 3.Bxa2 Kd3 4.O-O-O mate."
more ...
comment
Keywords: Belen Theme, Stalemate dissolution, Castling as mating move
Genre: 3#
Computer test: Popeye 4.61
FEN: 8/8/8/3P4/N1B5/4N3/P4P2/Rbk1K3
Input: James Malcom, 2020-09-20
Last update: Alfred Pfeiffer, 2020-09-22 more...
17 - P1380115
Thomas Beuman
253 Tim Krabbé's Website 08/04/2004
P1380115
(6+1) C+
#3
1. Tb4! Kc2 2. Sbc3 Kd3 3. 0-0-0#
play all play one stop play next play all
"Thomas Beuman managed a Belén 3-move miniature without a checking key, and without any duals. The key does take a flight square."
more ...
comment
Keywords: Belen Theme, Rex solus (s), Flight taking, Castling as mating move
Genre: 3#
Computer test: Popeye 4.85
FEN: 8/8/8/3N4/R7/P7/8/RNk1K3
Input: James Malcom, 2020-09-20
Last update: Felber, Volker, 2020-10-12 more...
18 - P1380116
Hauke Reddmann
Inselschach 1977
P1380116
(7+2) C+
#3
1. Sa4! Kc2 2. Sbc3 Kd3 3. 0-0-0#
play all play one stop play next play all
Krabbe's Reprint: "Hauke Reddmann informs me that in 1977, when he was 16, he had also composed a Belén."
more ...
comment
Keywords: Belen Theme, Castling as mating move
Genre: 3#
Computer test: Popeye 4.85
FEN: 8/8/8/8/8/1PN2p2/P4B2/RNk1K3
Reprints: 253 Tim Krabbé's Website 8/8/2004
Input: James Malcom, 2020-09-20
Last update: Alfred Pfeiffer, 2020-09-22 more...
19 - P1380121
Zalmen Kornin
Kibitzer's Cafe 29/7/2004
P1380121
(5+3)
#3
1. g8=D! Kc2 2. Sxc3 Kd3,Kb2 3. 0-0-0#,Da2#
1. ... axb1=D 2. Da2,Db3 Dxa1 3. Le3#
play all play one stop play next play all
https://www.chessgames.com/perl/chessforum.pl?kpage=566&archive=1#kibitzing

"On the subject of a mate in 3 that i showed yesterday here [ P1380114], the duals pointed out kindly by were detected too by T. Krabbé and Joshua Green, and there in "Open Chess Diary" J. Green suggests adding a White Pawn in 'a3', so the Problem is correct, but no longer a miniature and not diverse enough from an earlier MacDowell & Green setting; so the Author (my Chess friend) presents a new "Belén-Theme"- Mate in 3 - Author: Z. Kornin "The Kibitzer's Café" 2004 , Original: White: Ke1 - Ra1 - Bd4 - Nb1 - Pg7, Black: Kc1 - Pa2 - Pc3 #3 (5+3); or in Forsyth: 8-6P1-16-3B4-2p5-p7-RNk1K3 #3"
See the later P1380122
Henrik Juel: A small hint, James:
.. 2. Sxc3 Kd3 3. 0-0-0#
2. ... Kb2 3. Da2#
will force the weird animation to show what you intend it to show (2020-09-21)
James Malcom: I know how to do that Henrik-it is but my intention to animate the thematic line only. (2020-09-21)
comment
Keywords: Belen Theme, Promotion in the key, Castling as mating move
Genre: 3#
FEN: 8/6P1/8/8/3B4/2p5/p7/RNk1K3
Input: James Malcom, 2020-09-21
Last update: Alfred Pfeiffer, 2020-09-22 more...
20 - P1380122
Zalmen Kornin
Kibitzer's Cafe 5/8/2004
P1380122
(9+5) C+
#4
1. g8=D! d5 2. exd6ep Kc2 3. Sxc3 Kd3,Kb2 4. 0-0-0#,Dxa2#
play all play one stop play next play all
Final development of the earlier P1380121

https://www.chessgames.com/perl/chessforum.pl?kpage=587&archive=1#kibitzing

"For those interested in Chess Problems: In Tim Krabbé's "Open Chess Diary" the investigation on an idea in Composition, the so called "Belén-Theme" goes on with more novelties; - i'm arriving from that chess-cyber-café... i found that Problemist, he asked me "do You know the Valladão-Theme?" - Yes, i knew that jargon: "The Problem is pronto" What? "Ready" He showed me and asked me to publish here (is related to the previous ones) Author: Z. Kornin; "The Kibitzer's Café" 2004, Original - White: Ke1, Ra1, Bd4, Nb1, Pb6, Pc5, Pe5, Pg4, Pg7 (9); Black: Kc1, Pa2, Pc3, Pc6, Pd7 (5) - Mate in 4 , or in Forsyth: 8-3p2P1-1Pp5-2P1P3-3B2P1-2p5-p7-RNk1K3 (9+5) #4 < the key introduces a threat against 'a2', 'b3' and 'c4' , there are two related thematical variations, following a scheme aAbB - bBaA in the second and third moves; the sideline defenses 2...axb1 or 2...Kb2 in the 1...d5 variation are not total stops from the initial threats; in the en-passant moment there's a choice too: 3.cxd6 ep? c5! and Black will not fall in zugzwang; so 3.exd6!! - this effects springs from a natural setting - the Pawn 'c6' is necessary to stop an eventual Qxd5... Pawns 'b6' and 'g4' prevents duals in thematical play, other features are similar to the Author's scheme from "The Kibitzer's Café" July, 29 - see above Page 566.> The last chapter from a Chess-Composition workshop on-line!!"

Konig and Turm: ""Noch im Jahr der Thema(*)-Entdeckung (*the Belén) gelang dem Brasilianer Kornin eine Darstellung mit dem Valladão-Task" Hanspeter Suwe (2007);" (quote taken from here-https://www.chessgames.com/perl/chessuser?uname=vonKrolock)

Tim Krabbe's minuscule mention in #253 in a small edit to the 7/28 P.S: "(NB: see pages 566 [P1380121 ] and 587 of that forum for the on-line development of a Valladao-Belén.)"


http://www.berlinthema.de/Auswahl_PH.pdf-"Das Belén-Thema verlangt den schwarzen Königsmarsch von c1 nach d3 gefolgt von der weißen langen Rochade – wie P.H. richtig anmerkt, sollte man besser von einem „Motiv“ sprechen. Kornins Stück verbindet dieses Motiv vermutlich erstmalig mit einem Valladao.
Auf mich wirkt ein Valladao mit Damenumwandlung allerdings immer „halb“, denn der „eigentliche“ Sonderzug ist doch eine Unterverwandlung? Eine solche würde auch einen selbstverständlichen Schlüssel verhindern."
James Malcom: This is the first Valladao-Belen: the Belen theme plus promotion and en passant. (2020-09-21)
Henrik Juel: Only the cases with Black defending by d7-d5 and Kc1-c2 in his first two moves lead to dual-free full-length variations (2020-09-21)
comment
Keywords: Belen Theme, Valladao Task, En passant, Promotion in the key, Castling as mating move
Genre: n#
FEN: 8/3p2P1/1Pp5/2P1P3/3B2P1/2p5/p7/RNk1K3
Reprints: H48a Der Reiz des Ungewöhnlichen
König & Turm 22, p. 14, 5/2007
(15) MatPlus.net Forum 8/9/2019
Input: James Malcom, 2020-09-21
Last update: James Malcom, 2020-10-27 more...
21 - P1380124
Joaquim Crusats
chessproblem.net 1/1/2007
P1380124
(8+8) C+
#4
1. Df8! Sxc2+ 2. Lxc2+ Kxc2 3. Db4 Kd3 4. 0-0-0#
play all play one stop play next play all
https://www.chessproblem.net/viewtopic.php?f=7&t=60&p=2362

http://joaquimchessproblem.blogspot.com/2008/09/blog-post_40.html
Henrik Juel: But duals in short variations (2020-09-21)
James Malcom: So, Henrik? (2020-09-21)
more ...
comment
Keywords: Belen Theme, Castling as mating move
Genre: n#
Computer test: Gustav 4.1d, Brute Force
FEN: Q7/1R6/8/8/P1ppp3/n1p1p3/2P5/RBk1KbN1
Reprints: König & Turm 22, p. 14, 5/2007
Input: James Malcom, 2020-09-21
Last update: Alfred Pfeiffer, 2020-09-22 more...
22 - P1380128
James Malcom
(34) MatPlus.net Forum 18/9/2019
P1380128
(12+7) C+
#5
1. Sbc3!+ Kc2 2. cxd8=S b5 3. cxb6ep Txe6+ 4. Sxe6 Kd3 5. 0-0-0#
play all play one stop play next play all
http://matplus.net/start.php?px=1600656376&app=forum&act=posts&tid=2343&fid=xshows&page=1

http://www.berlinthema.de/Auswahl_PH.pdf-"Wenn man eine Unterverwandlung haben will, ist die Springerumwandlung in der Regel am einfachsten zu erzeugen, wegen der unterschiedlichen Gangart des Springers. Die (H48b) mag als Erstdarstellung ihre Berechtigung haben, doch daß Schwarz statt b7-b5 auch b7-b6 spielen kann, entwertet m.E. den e.p.-Schlag weitgehend. Zudem wirkt angesichts des ungedeckten Satzschachs das erste Zugpaar künstlich aufgesetzt."
James Malcom: This is the first Valladao-Belen with an underpromotion. However, it is damaged by the common "short" ep and a dualistic move order. (2020-09-21)
comment
Keywords: Belen Theme, Valladao Task, Checking key, under-promotion (S), En passant, Castling as mating move
Genre: n#
FEN: 3b4/1pPPr1p1/4P1P1/p1P5/N1p5/P7/P4P2/RNk1K3
Reprints: H48b Der Reiz des Ungewöhnlichen
Input: James Malcom, 2020-09-21
Last update: Alfred Pfeiffer, 2020-09-22 more...
23 - P1380129
Zalmen Kornin
harmonie 2006
P1380129
(4+3) C+
h#2*
* 1. ... 0-0-0#
1. Kc2! Sb1 2. Kc1 Sa3#
play all play one stop play next play all
more ...
comment
Keywords: Belen Theme (Anti-), Castling as mating move (Satz)
Genre: h#
Computer test: Popeye 4.83
FEN: 8/8/8/8/N1p5/2Nkp3/8/R3K3
Reprints: chessproblem.net 25/2007
(15) MatPlus.net Forum 22/9/2019
Input: James Malcom, 2020-09-21
Last update: Alfred Pfeiffer, 2020-09-22 more...
24 - P1380143
Peter Hoffmann
H48c Der Reiz des Ungewöhnlichen 9/2019
P1380143
(14+9) C+
#5
1. Sxc3+! Kc2 2. b8=T! f5 3. gxf6ep Lb5 4. Txb5 Kd3 5. 0-0-0#
play all play one stop play next play all
See the improved P1380148

http://www.berlinthema.de/Auswahl_PH.pdf-"In der einschlägigen Diskussion im „MatPlus Forum“ schälte sich heraus, daß Darstellungen mit Turm- oder Läuferumwandlung noch nicht existier(t)en, und dies rief P.H. auf den Plan, der ja ausdrücklich unerforschtes Terrain sucht.
In seinem Stück ist die Unterverwandlung in einen Turm im zweiten Zug logisch begründet – was auch hier das erste Zugpaar aufgesetzt wirken läßt. Mir scheint, daß das Belén-Motiv eher eine hinderliche Vorgabe ist ... 51
(Die Zweckreinheit der schwarzen Reihenfolge-Auswahl, welche die Damenumwandlung
widerlegt, soll hier nicht näher untersucht wurden. Unseres Erachtens ist sie zweckrein, falls man bereit ist, den Austausch der Möglichkeit 5. L:e4# durch die Möglichkeit 5. 0-0-0# als bloße Kompensation zu sehen.)"

http://matplus.net/start.php?px=1570441154&app=forum&act=posts&fid=gen&tid=2361&pid=17978#n17978

Post #1-"A wonderfull surprise! PH presented today a brand new Valladao-Belen, its already published in Erik Zierke's online book in PDF on Hoffmann's works:

http://www.berlinthema.de/AUSWAHL_PH.pdf

page 181, with full solution and comments. In page 180 are also presented, and commented, the known examples of Valladao-Belen (Just two so far, one of them evolved online recently here in MP):

http://matplus.net/start.php?px=1569833313&app=forum&act=posts&fid=xshows&tid=2343&pid=17926#n17926

After a promotion to Queen, and a promotion to Knight, now we have a promotion to Rook.

****** Peter, thanks for Your interest in the Valladão-Belén!! :"

Post 7-"In his excellent # 5, Peter Hoffmann introduces important novelties in the VB field: The promotion move act in three different levels of significance (control of b3, of b5 avoiding to affect d3, and - not least- create a threat of mate in two in e4, allowing a consistent en passant part in real play) : 2.b8 = R is the most impressive single movement in the whole VB's history!

He refers to the Belén as a "motif". In the old Rebnora forum discussions Frank Richter alluded to an "ornamental effect". For Erik Zierke, the Belén condition arrive to become an obstacle ('Hindernis') for the more satisfactory expression in the Valladão field (in the same book we find others of Peter Hoffmann's creations in this field)."
James Malcom: The first Valladao-Belen with a rook promotion. (2020-09-22)
more ...
comment
Keywords: Belen Theme, Valladao Task, Capture key, Checking key, under-promotion (T), En passant, Castling as mating move
Genre: n#
FEN: B3b3/1P3pPQ/4p3/3pP1P1/3Pn3/BPp2p2/pP3P2/RNk1K3
Reprints: (1) MatPlus.net Forum 30/9/2019
Input: James Malcom, 2020-09-22
Last update: Alfred Pfeiffer, 2020-09-22 more...
25 - P1380144
James Malcom
Zalmen Kornin

chessproblem.net 10/8/2019
P1380144
(12+9) C+
#5
1. Sc3+! Kc2 2. h8=L! e5 3. fxe6ep cxd4 4. Lxd4 Kd3 5. 0-0-0#
play all play one stop play next play all
https://www.chessproblem.net/viewtopic.php?f=7&t=1078&p=2344&hilit=belen#p2344

"Yes, a Valladao-Belen with a Bishop promotion, and the first to ever appear before the public !"

http://www.berlinthema.de/Auswahl_PH.pdf-"P.H.s (H48c) löste eine verstärkte Suche nach einer Darstellung mit der nun einzig noch feh- lenden Läuferumwandlung aus, und formell ist die (H48e) die Erstdarstellung. Allerdings sehen wir hier dieselbe gravierende thematische Schwäche wie in der (H48b), daß der Doppelschritt vor dem e.p.-Schlag nicht exklusiv ist und Schwarz ebenso den Einzelschritt spielen könnte – wodurch es zum gleichen Spiel kommt nur ohne den thematisch unabdingba- ren e.p.-Schlag."

http://matplus.net/start.php?px=1600576227&app=forum&act=posts&fid=xshown&tid=2367-"****...and the solution now is complete. Yes, You knew already, I'm sure: "habemus episcopus" - after Q, N and R, a promotion to Bishop in a published Valladao-Belen!"
James Malcom: The first Valladao-Belen with a bishop promotion. (2020-09-22)
comment
Keywords: Belen Theme, Valladao Task, Checking key, under-promotion (L), En passant, Castling as mating move
Genre: n#
FEN: 8/4p2P/3p4/pPpp1P2/B1pP1P2/Br3p2/1P3P2/RNk1K3
Reprints: H48e Der Reiz des Ungewöhnlichen
(1) MatPlus.net Forum Moremovers 10/8/2019
Input: James Malcom, 2020-09-22
Last update: Alfred Pfeiffer, 2020-09-22 more...
26 - P1380148
James Malcom
Peter Hoffmann

H48d Der Reiz des Ungewöhnlichen 9/2020
JM nach PH
P1380148
(15+7) C+
#5
1. Sxc3+! Kc2 2. b8=T! d5 3. cxd6ep Dxb5,Dc6 4. Txb5,Lxc6 Kd3 5. 0-0-0#
3. exd6ep? Dxe6+!
3. Lxd5? Dd8!
play all play one stop play next play all
See P1380143

http://www.berlinthema.de/Auswahl_PH.pdf-"James Malcom weist darauf hin, daß ohne die schwarze Logik in der Widerlegung der Damenumwandlung man eine eindeutige Zugreihenfolge in der Lösungsphase erhalten kann. Danke für das Interesse an unserer Schrift!"
James Malcom: Some months back, I managed to improve Hoffmann's P1380143. But has only been published recently alongside it, and ironically in the same month. The point here is that there is but a single solution. It turned out to be scarcely possible, requiring every White man but the queen. (2020-09-22)
comment
Keywords: Belen Theme, Valladao Task, Capture key, Checking key, under-promotion (T), En passant, Castling as mating move
Genre: n#
FEN: B1N1q3/1P1p4/4P1p1/1RP1P1P1/8/BPp2p2/pP3P2/RNk1K3
Input: James Malcom, 2020-09-22
Last update: Olaf Jenkner, 2021-01-04 more...
27 - P1380158
James Malcom
chessproblem.net 14/10/2019
P1380158
(7+8) C+
#3
1. b8=D? Lb3!

1. Lxa2+! Kc2 2. b8=D Kxd3 3. 0-0-0#
2. ... e2,~ 3. Db1#
1. ... Kb2 2. b8=D+ Kxa1 3. Db1#
2. ... Kxa3 3. Lb1#,Lxc4#
2. ... Kc2 3. Db1#
play all play one stop play next play all
https://www.chessproblem.net/viewtopic.php?f=7&t=60&p=2362
Henrik Juel: C+ Popeye 4.61, except for the mate dual after 2... Kxa3 (2020-09-22)
comment
Keywords: Belen Theme, Capture key, Checking key, Promotion, Castling as mating move
Genre: 3#
Computer test: Popeye 4.61
FEN: 8/1P6/8/8/2ppp3/P1pPp1n1/b7/RBk1K1N1
Input: James Malcom, 2020-09-22
Last update: James Malcom, 2020-09-23 more...
28 - P1380368
James Malcom
MatPlus.net Forum 22/9/2020
Gewidmet Zalmen Kornin & Peter Hoffmann
P1380368
(14+9) C+
#7
1. Sc3+! Kc2 2. exd4 hxg1=D+,T+ 3. Txg1 Lxh5 4. g4 fxg3ep 5. Txg3 Lg4 6. Txg4 Kd3 7. 0-0-0#
play all play one stop play next play all
http://matplus.net/start.php?px=1601242024&app=forum&act=posts&fid=gen&tid=2488

http://www.berlinthema.de/Auswahl_PH.pdf-"J.M. arbeitete weiter am Valladao-Belén und konnte ihn schließlich gemischtfarbig zeigen! Den „Umwandlungsdual“ halten wir für irrelevant, da ohne Pattmotiv die Turmumwandlung kein eigenständiger Zug ist. Und wir anerkennen durchaus die Pionierleistung! Andererseits ist ein ungedecktes Satzmatt eine sehr häßliche Konstruktionserleichterung."
more ...
comment
Keywords: Belen Theme, Valladao Task, Checking key, En passant, Promotion, under-promotion (t), Castling as mating move
Genre: n#
Computer test: Popeye 4.61
FEN: 8/5B2/6P1/3P3Q/2pq1pb1/Bp2Pp2/pP3PPp/RNk1K1NR
Reprints: H48j Der Reiz des Ungewöhnlichen 9/2020
Input: James Malcom, 2020-09-27
Last update: James Malcom, 2020-10-28 more...
29 - P1381497
James Malcom
chess.stackexchange.com 15/6/2020
P1381497
(3+4) C+
#1
Bosma
1. 0-0#!
play all play one stop play next play all
https://chess.stackexchange.com/a/29992/15543
A.Buchanan: Hi James, couple of nits about old Bosma:
(1) From the 1985 Laws: "Article 5. THE MOVES OF THE PIECES The King (a) Except when cast[l]ing, the king moves to any adjoining square that is not attacked by an opponent's piece." This is separate from Article 9. CHECK 9.1 "The king is In check when the square it occupies is attacked by one or two of the opponent's pieces; in this case the latter is or are said to be "checking the king.' 9.2 Check must be parried by the [move] immediately following." This point may have been an assumption in earlier compositions, as e.g. it prevents kings from being adjacent.
(2) And again from Article 5. "(f) Castling is prevented for the time being - (i) if the king's original square or the square which the king must cross over or that which it is to occupy is attacked by an opponent's piece," Does this prevent your 1.0-0?
What do you think? (2020-11-08)
James Malcom: Ah, why did I but never bother to look at the castling rules!

Well I see nothing against adjacent kings, and seeing about how the "loophole" was about was not explicitly stated couldn't be done, I see it as allowed, and thus what to watch out for in cooks.

The rule on castling says "piece," not pieces. So, quite simply, castling in, out (P1381498), and through (P1381499) check is allowed in my view. (2020-11-09)
James Malcom: Furthermore, if a king is "attacked," they are in check, plain and simple. So, since a triple check/ attack is not defined as a danger to the king, the king may go to any such square, including the acts of catling and adjacent kings.

Also, going by the law itself, and not the Bosma conditions, the king may be captured, but it does nothing and that side can never be checkmated, while Bosma Chess itself allows no king capture. But since the effect is the same, allowing for my jokes to be C+ by Winchloe if the program agrees. Maybe try out my castlings in it? (2020-11-09)
James Malcom: And indeed Andrew has tested my castling problems now-all are C+? (2020-11-14)
James Malcom: Typo-!, not ?. (2020-11-14)
more ...
comment
Keywords: Joke, Bosma, Miniature, Castling as mating move
Genre: n#
Computer test: C+ WinChloe 3.51
FEN: 8/8/8/8/8/7n/5Rrp/2k1K2R
Input: James Malcom, 2020-11-03
Last update: James Malcom, 2021-01-29 more...
30 - P1381790
James Malcom
Facebook 24/09/2020
P1381790
(7+5) C+
#3
1. h8=D+! e5 2. dxe6ep+ Kxd3 3. 0-0-0#
2. ... Kxb4 3. Db2#
play all play one stop play next play all
more ...
comment
Keywords: Valladao Task, Promotion in the key (D), En passant, Castling as mating move, Checking key, Flight giving key
Genre: 3#
Computer test: popeye 4.85
FEN: 8/4p2P/3p4/2pP4/1R6/2kBp3/8/R3K1N1
Input: James Malcom, 2020-11-12
Last update: Alfred Pfeiffer, 2020-11-13 more...
31 - P1381850
Josef Cumpe
Deutsche Schachzeitung , p. 371, 12/1915
P1381850
(5+2)
#2
A nice range of tries, but a dual:
1. e8=T!
1. ... Kxc2 2. 0-0-0-0-0-0#
1. ... bxc2 2. Dd5,De4#
1. ... Kd4 2. De4#

1. De4+? Kxe4!
1. e8=D? Kxc2!
1. Tc4? Kxc4!
1. Tc3+? Kd4!
play all play one stop play next play all
'DSZ': "Diese Aufgabe regt den Gedanken an, daß die itaienische freie Rochade noch viel besser hätte ausgenützt werden können, als es (ehedem) tatsächlich der Fall war."

ähnelt stark der P1277302
A.Buchanan: @Henrik how should the dual here impact C+ status we assign? What's the general principle we curators should apply, to avoid us having to make subjective judgements? (2021-01-07)
A.Buchanan: My own simple-minded aesthetic says this is a major dual, because one mate achieves no individual expression elsewhere (2021-01-07)
Henrik Juel: The easiest principle is to say that C+ means completely correct: no cooks and no duals
I would permit short mates, because they occur as a result of suboptimal defense, and double threats, if they do not materialize as duals
But it seems fair also to permit minor duals, including promotion mate duals like TD og LD
So I would not label this problem C+ (2021-01-08)
A.Buchanan: Thank you Henrik, for your thoughtful response. A lot is bundled into one bit of information: the value of the C+? flag. I went back to the Codex to learn more. I think C+ should mean (1) it's been tested & (2) it is sound. Sound (which we don't have in PDB yet) for an antagonistic problem (i.e. d# or s#) means three things: (1) there is a solution (2) there's no cook & (3) there's a defence which forces the specified number of moves. Legality doesn't impact soundness, and for antagonistic problems, neither do duals.

The Codex says there is a lot of judgement involved in assessing the impact of duals in a d#. "C+?" is a result of computer analysis, and I don't think there should be any curator subjectivity in determining its value. I think the answer is to have "duals" as a new separate field so that your valuable analyses aren't lost in conversation, and people can understand the spectrum of quality. In the end, maybe people will be able to set up in their profile their personal preference for dual tolerance, but that's probably some way ahead. I think there are naturally core fields (like cooked?, legal?, tested?) and derived fields (like sound? C+?, HC+?) whose values depend on the core ones. I've sent some notes to Gerd along these lines to see what he thinks. Any thoughts yourself? (2021-01-08)
comment
Keywords: Staugaard castling, under-promotion key (T), Castling as mating move, Miniature, Joke, Minimal
Genre: 2#
Computer test: WinChloe rokagogo is sufficient to test soundness, although there is a dual
FEN: 8/4P3/8/8/8/1p1k4/1PR5/4K2Q
Input: Mario Richter, 2020-11-13
Last update: A.Buchanan, 2021-01-07 more...
32 - 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...
33 - P1390560
Geir Sune Tallaksen Østmoe
Discord Chess Problems & Studies Server 02/05/2021
4th Place
Discord Composition Tourney 1
P1390560
(14+5)
#1
b) f5->e1 c) f5->g1
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
Genre: Retro
FEN: B7/p4P2/p7/P2PpK2/6P1/3P1kpP/1P1P2R1/2NN3R
Input: A.Buchanan, 2021-06-08
Last update: A.Buchanan, 2021-06-09 more...
Show statistic for complete result. Show search result faster by using ids.

https://pdb.dieschwalbe.de/search.jsp?expression=COMMENTDATE%3E%3D20200919+AND+NOT+K%3D%27Hilfsr%C3%BCckz%C3%BCger%27+AND+K%3D%27Rochadematt%27

The problems of this query have been registered by the following contributors:

Gerd Wilts (1)
Brian Stephenson (1)
Mario Richter (2)
A.Buchanan (3)
Felber, Volker (1)
James Malcom (25)