Die Schwalbe

22 problem(s) found in 3844 milliseconds (displaying 22 problem(s)). [COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND S='MatPlus.net Forum']

1 - 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...
2 - 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...
3 - P1380125
James Malcom
(1) MatPlus.net Forum 29/8/2019
P1380125
(8+6) C+
s#6
1. Sd3+! Kc2 2. Tc5+ Kxd3 3. Dd6+ Ke4 4. Sc3+ bxc3 5. De5+ Kd3 6. 0-0-0+ Td2#
play all play one stop play next play all
http://matplus.net/start.php?px=1600576227&app=forum&act=posts&fid=xshows&tid=2343
James Malcom: As far as I know, this is the first presentation in a selfmate. Of course it can be argued that a Belen only constitutes White castling with mate, but as far as I see it as long as the BK's journey is done and the last move is White's castling, it is a Belen. haven't seen any opposition to this as I have seen. (2020-09-21)
more ...
comment
Keywords: Belen Theme, Checking key, Castling
Genre: s#
Computer test: Gustav 4.1d, Brute Force
FEN: 8/8/1Q6/1R6/1p3N2/bp6/br3PP1/RNk1K3
Input: James Malcom, 2020-09-21
Last update: Alfred Pfeiffer, 2020-09-22 more...
4 - P1380126
James Malcom
(10) MatPlus.net Forum 31/8/2019
P1380126
(7+4) C+
s#3
1. Lc2+! Kxc2 2. Dd3+ Kxd3 3. 0-0-0+ Sd2#
play all play one stop play next play all
http://matplus.net/start.php?px=1600576227&app=forum&act=posts&fid=xshows&tid=2343
more ...
comment
Keywords: Belen Theme, Checking key, Castling
Genre: s#
Computer test: Gustav 4.1d, Brute Force
FEN: 8/8/3QR3/2r5/1pn5/B7/1P6/RBk1K3
Input: James Malcom, 2020-09-21
Last update: Alfred Pfeiffer, 2020-09-22 more...
5 - 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...
6 - 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...
7 - P1380136
James Malcom
(3) MatPlus.net Forum 20/9/2019
P1380136
(9+4) C+
#3
1. Sg4! Kc2 2. Se5 Kc1 3. Sa3#
play all play one stop play next play all
http://matplus.net/start.php?px=1600576227&app=forum&act=posts&fid=gen&tid=2356
more ...
comment
Keywords: Belen Theme (Anti-)
Genre: 3#
Computer test: Popeye 4.61
FEN: 8/8/8/8/1p1Bp3/1P1kPp2/P4P1N/RN2K3
Input: James Malcom, 2020-09-21
Last update: James Malcom, 2020-09-21 more...
8 - 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...
9 - 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...
10 - P1380320
James Malcom
www.chess.com 9/7/2020
P1380320
(9+9)
#5
1. Kd3! droht 2. Ke4 ... 3. Kf3 ... 4. Lxg2#,Lxg4#
1. ... Sh5 2. Txh5 b5 3. e8=T! b4 4. Te6 Sxe5+,S~ 5. Txe5#,Tx~#
1. ... Se6,Sf5 2. Lxe6,Lxf5 b5 3. e8=L! b4 4. Lh5 Lf6,L~ 5. Lhxg4#
1. ... b5 2. e8=L! Se6,Sf5 3. Lxe6,Lxf5 b4 4. Lh5 Lf6,L~ 5. Lhxg4#
play all play one stop play next play all
https://www.chess.com/forum/view/more-puzzles/a-challenging-mate-in-5-can-you-find-the-first-move?page=1

http://matplus.net/start.php?px=1601166179&app=forum&act=posts&fid=gen&tid=2507
Henrik Juel: Correct key, but damaged by multiple threats and duals, e.g.
1.Kd3 thr. 2.e8=DTLS,Ke4 (2020-09-27)
James Malcom: Typo fixed. And Henrik, the threats are not the point here. The point here is how the different play of the Black knight changes White's promotions. (2020-09-27)
A.Buchanan: It's a beautiful idea, still looking for its rendering though as the many duals and the obstreperous wL are quite distracting (2020-09-28)
James Malcom: There aren't any duals in full-length variations, though. The extra bishop is indeed annoying, but unfixable so far. (2020-09-28)
A.Buchanan: There are still some trivial duals in the mating move, but yes. This problem is trying to ignore threats: you can see that the computer solution. The solution is much more coherent with "nosh noth" switched on. So when are the cases, Henrik, when you switch those options on? It would be event better if one was able to switch threats on for the 4th move. This underscores that there should be a Popeye option for any white move "noth" is self-selecting, depending upon the number of variations. (2020-09-29)
Henrik Juel: Andrew, I use the Popeye option 'nosh' when the output without them is overwhelmingly large
The 'not' option is tricky, and usually expands the output; in some cases it shows apparent duals that are not real ones, when you apply the rule that dualistic play should be ignored, when it appears after black moves that do not prevent the threat
In the case of multiple threats things get messy, like in this problem, as I recall (2020-09-29)
more ...
comment
Keywords: under-promotion (T, L), Changed mates, Non-standard material (L)
Genre: n#
FEN: 2B4R/4P1n1/1p6/4P3/6nb/1P2p2k/2K1Pprp/5B1N
Reprints: MatPlus.net Forum 10/7/2020
Input: James Malcom, 2020-09-27
Last update: James Malcom, 2020-09-29 more...
11 - 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...
12 - P1380439
James Malcom
MatPlus.net Forum 23/09/2020
P1380439
(13+1) C+
#4
1. ... Kxc2 2. Sd2! Kxd3 3. Sc4 Kc2 4. Se3+ Kd3 5. Td1#
play all play one stop play next play all
See also P1380440
Henrik Juel: Apparently there is a #3
1.c4? Kxc2 2.Sc3 Kxd3 3.0-0-0?
But two facts prevent this try
1. Black has no last move, so he has the move
2. wKe1 must have moved, so White cannot castle
The solution is
0... Kxc2 1.Sd2 Kxd3 2.Sc4 Kc2 3.Se3+ Kd3 4.Td1#
C+ Popeye 4.61 (2020-09-29)
comment
Keywords: Rex solus (s), Belen Theme (Anti-), Cant Castler, No legal last move for Black, Capture key
Genre: n#, Retro
Computer test: Popeye 4.61
FEN: 8/8/8/8/8/BPPP1P2/PPB2P2/RNk1KR2
Input: A.Buchanan, 2020-09-29
Last update: Alfred Pfeiffer, 2020-10-08 more...
13 - P1380440
James Malcom
Andrew Buchanan

MatPlus.net Forum 23/09/2020
JM, version AB
P1380440
(10+1) C+
#4
wK has moved so:
1. c4? Kxd3 2. Sc3 Kd4 3. Ld6 Kd3 4. 0-0-0#?
2. ... Kc2 3. c5 Kd3 4. 0-0-0#? is a try

1. f3! Kxd3 2. Kf2 Kc2 3. Se3+ Kd3 4. Td1#

R: 1. Kc1xLc2 Lb1xTc2,Lb1xSc2 Easter Egg!
play all play one stop play next play all
Henrik Juel: Compared to James's P1380439:
1. Last move could be Kc1xLc2, so White has the move
2. White may not castle, so
1.c4? Kxd3 2.Sc3 Kd4 3.Ld6 Kd3 4.0-0-0, 2... Kc2 3.c5 Kd3 4.0-0-0 is a try
The solution is
1.f3 Kxd3 2.Kf2 Kd2 3.Se3 Kd3 4.Td1#
2... Kc2 3.Se3+ Kd3,Kd2 4.Td1#
C+ Popeye 4.61
Very nice, James and Andrew (2020-09-29)
A.Buchanan: Thanks Henrik - Belen precondition of bKc1 was satisfied 1.0 move ago. From that position there is a sound #5 but position is clunky and not Meredith.
You didn’t fall into the trap of thinking Black has no last move: there is a dualized solution with BTM waiting for you if you did. (2020-09-30)
James Malcom: Haha, yeah. I fell for Andrew's trap, hook, line, and sinker! :-) (2020-09-30)
comment
Keywords: Rex solus, Belen Theme (Normal & Anti-), Cant Castler
Genre: n#, Retro
FEN: 8/8/8/8/8/BPPP4/PPk2P2/R2NK3
Input: A.Buchanan, 2020-09-29
Last update: James Malcom, 2020-10-08 more...
14 - P1380852
James Malcom
Andrew Buchanan

MatPlus.net Forum 12/10/2020
nach Josef Cumpe
P1380852
(1+7)
Last two moves?
(-:
See P1234039 and P1375777
The joke here is that pawns may promote to enemy officers (but not to pawns or kings)
Henrik Juel: R: 1... 0-0-0+ 2.a7-a8=sT! (2020-10-12)
A.Buchanan: Maybe this is a moderate joke where we allow promotion to Bl officers, while son-of-P1375777 can be the extreme joke where promotion to any Bl unit is allowed (i.e. pawn & king too), including in the history of the game. What would Josef Cumpe think? :-) He and I are both dressed as clerics in out chesscomposers' blogspot pics: http://chesscomposers.blogspot.com/2012/08/august-16th.html. Perhaps he was a real one though? (2020-10-13)
comment
Keywords: Last Moves?, Joke promotion (t), Rex solus, Type C, Castling in the retro play, Joke, Promotion in the retro play (t)
Genre: Retro
FEN: 2kr2K1/1p1p1npr/8/8/8/8/8/8
Input: A.Buchanan, 2020-10-12
Last update: Alfred Pfeiffer, 2020-10-14 more...
15 - P1380855
James Malcom
MatPlus.net Forum 12/10/2020
P1380855
(14+14) C+
BP in 12.0
1. g3 d6 2. Lg2 Dd7 3. Ld5 Dh3 4. Le6 fxe6 5. a4 Kf7 6. a5 Kg6 7. a6 Kh5 8. axb7 g6 9. bxa8=L Lg7 10. Lg2 Lxb2 11. Sf3 Lg7 12. Lb2 Lb7
play all play one stop play next play all
James Malcom: The theme is that 5 bishops are fianchettoed-one more than normally allowed! (2020-10-13)
Rainer Staudte: Rules allow a 20-bishops-fianchetto. (2020-10-13)
Henrik Juel: Very nice, James
For this short PG any tester will suffice, but if you push this idea further, Natch is much faster than Jacobi (2020-10-13)
A.Buchanan: Can’t a fianchettoed bishop go round to the bank rank and do it again? So even 20 is not a barrier (2020-10-13)
A.Buchanan: Dates in PDB are yyyy-mm-dd or dd/mm/yyyy. Hence I will change publication date from Dec to Oct (2020-10-13)
James Malcom: Right-the date slipped me again!

Andrew, while a bishop can easily be fianchettoed twice+, about the number of bishops doing it, not how many times it is done. I'm sure that an expert could do 6 fianchettoing bishops. (2020-10-13)
A.Buchanan: I am joking James: this is cool already (2020-10-13)
comment
Keywords: under-promotion (L), Phoenix, Impostor (L), Unique Proof Game
Genre: Retro
Computer test: Jacobi v0.7.5
FEN: 1n4nr/pbp1p1bp/3pp1p1/7k/8/5NPq/1BPPPPBP/RN1QK2R
Input: James Malcom, 2020-10-13
Last update: James Malcom, 2020-10-14 more...
16 - P1380896
Andrew Buchanan
MatPlus.net Forum 12/10/2020
P1380896
(13+13) C+
PG in 6.5
(-:
1. b4 g5 2. b5 g4 3. b6 g3 4. bxa7 gxh2 5. axb8=sS! hxg1=wT! 6. Txh7 Txh7 7. Th1
play all play one stop play next play all
The joke here is that pawns may promote to foreign units.
Henrik Juel: The testers probably do not work here, but this seems unique
1.b4 g5 .. 4.bxa7 gxh2 5.axb8=sS hxg1=wT 6.Txh7 Txh7 7.Th1 (2020-10-14)
A.Buchanan: According to Joost De Heer, WinChloe has a category “promotions adverses”, and under this, the problem is C+. Looking now for a full Homebase without utilising promotion to enemy pawn, which makes it too easy (2020-10-15)
comment
Keywords: Unique Proof Game, Joke, Joke promotion (sT), Homebase (w)
Genre: Retro
Computer test: C+ WinChloe
FEN: rnbqkbn1/1ppppp1r/8/8/8/8/P1PPPPP1/RNBQKB1R
Input: A.Buchanan, 2020-10-14
Last update: A.Buchanan, 2020-10-15 more...
17 - P1381266
James Malcom
(2) MatPlus.net Forum 27/9/2019
P1381266
(6+7) C+
#7
1. Kc1! d6 2. h8=S! gxh6 3. Sg6 h5 4. Sf4 h4 5. Sxd3 h3 6. Se1 h2 7. Sc2#
play all play one stop play next play all
https://www.matplus.net/start.php?px=1603494562&app=forum&act=posts&fid=xshown&tid=2346
James Malcom: This composition is one of my personal favorites amongst mine. It was inspired be Krabbe's Journal #89, which touches on the so called theme of "remote knight promotion." The point of this is to show the aximum diaganol distance with kings and pawns only.

A Meredith rendering is still pending for any geniuses out there. (2020-10-24)
more ...
comment
Keywords: Stalemate avoidance, Kindergarten Problem, under-promotion (S)
Genre: n#
Computer test: Gustav 4.1d, Brute Force
FEN: 8/3p2pP/7P/p2P4/p7/P2p4/p2P4/k2K4
Input: James Malcom, 2020-10-24
Last update: Alfred Pfeiffer, 2020-10-26 more...
18 - P1381285
Andrew Buchanan
James Malcom

MatPlus.net Forum 25/10/2020
P1381285
(5+7) C+
#3
Bosma
1. Tf5+! Sxf5+ 2. Se4+! Sxe4 3. De6#
play all play one stop play next play all
James Malcom: I've added in the solution now. (2020-11-02)
Henrik Juel: Thanks, James
I cannot test the problem, but it seems OK (2020-11-02)
A.Buchanan: Thanks Henrik: it's C+ according to WinChloe (2020-11-03)
comment
Keywords: Aristocrat, Bosma
Genre: 3#, Fairies
Computer test: C+ WinChloe v3.51
FEN: 3r2R1/3Q4/3K1k2/2n1R3/1b6/6n1/3N3q/3r4
Input: A.Buchanan, 2020-10-25
Last update: A.Buchanan, 2020-11-03 more...
19 - P1381345
James Malcom
(36) MatPlus.net Forum 14/10/2020
P1381345
(13+11) C+
BP in 9.5
(-:
1. f4 h5 2. f5 h4 3. f6 h3 4. fxe7 hxg2 5. exf8=B gxh1=T 6. Lg2 Ke7 7. Lxb7 Ke6 8. Lxa8 Se7 9. Lb7 Txf8 10. Lxc8
play all play one stop play next play all
http://matplus.net/start.php?px=1603899391&app=forum&act=posts&tid=2475&fid=gen&page=1
James Malcom: The point of this PG was to make a true Belfort, after the lone bishop in P1379376 was pointed out to not be a true Belfort. (2020-10-28)
A.Buchanan: I think the notion of a Belfort piece is the foundation idea. Then the question of whether a composition is a Belfort is derived from that, and should include other criteria as well. The original tourney succeeded in launching this idea, but we are surely allowed to clean up the position definition. I will check in the Encyclopedia (2020-10-30)
A.Buchanan: Belfort is not in the Encyclopedia! (2020-10-30)
more ...
comment
Keywords: Joke (Not!), Schnoebelen Theme (B), Dummy Pawn, Golden Age, Belfort (Lt), Prenix (t), Prentos Theme (B), Ceriani-Frolkin Theme (B)
Genre: Retro
Computer test: Jacobi v.0.7.5
FEN: 1nBq1r2/p1ppnpp1/4k3/8/8/8/PPPPP2P/RNBQK1Nr
Input: James Malcom, 2020-10-28
Last update: James Malcom, 2020-10-30 more...
20 - P1381369
Andrew Buchanan
MatPlus.net Forum 28/10/2020
P1381369
(14+14)
SPG in 4.0
shortest PG with 4 units captured on 1 square
Henrik Juel: 1.Be2-e3 Ba7-a6 2.Lf1xa6 Bb7xa6 3.Dd1-e2 Lc8-b7 4.De2xa6 Lb7xa6
Very easy and C+ by Natch 3.1
Nice tempo move 3... Lb7 (2020-10-29)
A.Buchanan: Thanks - tempo is to force unique order on Wh moves (2020-10-30)
comment
Keywords: Unique Proof Game, Tempo Move, Task (Construction) (4), Superseded by (P1381879), x pieces capture on one square (4)
Genre: Retro
FEN: rn1qkbnr/2pppppp/b7/8/8/4P3/PPPP1PPP/RNB1K1NR
Input: A.Buchanan, 2020-10-29
Last update: James Malcom, 2020-11-14 more...
21 - P1381879
Andrew Buchanan
MatPlus.net Forum 3/11/2020
P1381879
(13+13) C+
BP in 7.0
1. e4 a6 2. Lxa6 bxa6 3. De2 Lb7 4. Dxa6 Sxa6 5. b4 Db8 6. b5 Da7 7. bxa6 Dxa6
play all play one stop play next play all
Inspired by P1381620

See also P1381369
Henrik Juel: C+ Natch 3.1
1.Be2-e4 Ba7-a6 2.Lf1xa6 Bb7xa6 3.Dd1-e2 Lc8-b7
4.De2xa6 Sb8xa6 5.Bb2-b4 Dd8-b8 6.Bb4-b5 Db8-a7
7.Bb5xa6 Da7xa6
Six captures on a6 (2020-11-14)
comment
Keywords: Unique Proof Game, Task (Construction) (6), x pieces capture on one square (6)
Genre: Retro
Computer test: Natch 3.1
FEN: r3kbnr/1bpppppp/q7/8/4P3/8/P1PP1PPP/RNB1K1NR
Input: A.Buchanan, 2020-11-14
Last update: Alfred Pfeiffer, 2020-11-16 more...
22 - P1382303
James Malcom
Jacques Rotenberg

(10) MatPlus.net Forum 22/11/2020
P1382303
(8+5)
#2
1. Tb2+? Ka3!

1. Lf3! ... 2. Ld1#
play all play one stop play next play all
Inspired by P1182074

White releases stalemate as a #2, giving Black 20(!) moves. First record in a new task. See:
http://matplus.net/start.php?px=1606065655&app=forum&act=posts&fid=gen&tid=2586&pid=20040#n20040
Henrik Juel: No record, P1182074 is far better in terms of giving Black moves, 32
But this problem also a #2 (2020-11-22)
A.Buchanan: First record in a new task (2020-11-22)
James Malcom: Henrik, you misunderstood! The task is different from the 32! This is about Black release in the #2 form, not releae in the fairy form. (2020-11-22)
comment
Keywords: Stalemate dissolution
Genre: 2#
FEN: 8/8/NN1p4/1p1B4/1Pr5/1kb4R/3R4/1KB5
Input: James Malcom, 2020-11-22
Last update: A.Buchanan, 2020-11-22 more...
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The problems of this query have been registered by the following contributors:

Felber, Volker (1)
James Malcom (14)
A.Buchanan (7)