Die Schwalbe

54 problem(s) found in 3406 milliseconds (displaying 54 problem(s)). [COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND K='Schachschlüssel']

1 - P1007554
Baldur Kozdon
8785 Die Schwalbe 152 04/1995
P1007554
(4+12)
#10
1. Ka3? droht 2. Tb3,T~8#, aber 1. ... Lf6!
1. Tb5+! Ka2 2. Lb7 droht 3. Lxd5
3. ... Te5 3. Tb2+ Ka1 4. Ka3 Se2 5. Txe2+ Kb1 6. Tb2+ Kc1 7. Le3+ Kd1 8. La6 ... 9. Tb1+ Kc2 10. Tc1#
2. ... f2 3. Lxd5+ Tb3 4. Txb3 Te5 5. Tb2+ Ka1 6. Tb3,T~8#
play all play one stop play next play all
Schwer zu durchschauende Rückkehrstrategie (MS). Schwierig und schön (FU). Oft gesehene Vorplanstaffelung (FSch). Auch aus einem bekannten Schema läßt sich offensichtlich immer wieder etwas Interessantes machen (PG). Nach guter Einleitung folgt ein sehr grobes und in 6-zügiger Länge erschlaffendes Schlußspiel (MOe). In gewohnter Kozdon-Qualität, großartiges Problem (KHS).
Anton Baumann: C+ Gustav 4.1d (2020-11-25)
comment
Keywords: Checking key, Logical Problem, Beugung
Genre: n#
FEN: 3b4/8/B2pr3/p2p1b2/K2Bp3/5p1r/1R5n/k5n1
Input: Gerd Wilts, 2003-06-29
Last update: Gunter Jordan, 2020-11-25 more...
2 - P1016504
Oleg W. Paradsinski
1215 Shakhmatnaya Poeziya 01-06/2002
P1016504
(5+2) C+
s#5*
* 1. ... Lxb7#
1. Db5+! Kc7 2. De5+ Kc8! 3. Dh8+ Kc7 4. Dd8+ Kc6 5. Da5 Lxb7#
play all play one stop play next play all
Synthese-Meeraner (im Selbstmatt), Themafigur: sL
Henrik Juel: C+ Popeye 4.61 (2020-11-09)
comment
Keywords: Mutate, Meerane-Thema, Round Trip (D-5), Miniature, Minimal (l), Model mate, Checking key, Flight giving key
Genre: s#
FEN: b7/PN6/K1k1P3/Q7/8/8/8/8
Input: Selbstmatt-Miniaturen/Reflexmatt-Miniaturen, 2004-05-01
Last update: Gunter Jordan, 2020-11-26 more...
3 - P1033552
Valeriu Petrovici
Mirko Degenkolbe

Buletin Problemistic 1998
1.-2. Preis ex aequo
Coupe de la Federation de Roumanie des Echecs
P1033552
(10+8)
#2
1. Dxh3? droht 2. Se6#
1. ... Se4!,Sb4!

1. Dxg1? droht 2. Dxf2#
1. ... Dg2!,Sb4!

1. Dxf3! droht 2. Td5#
1. ... Dxf3+ 2. Sxf3#
1. ... Le6 2. Sxe6#
1. ... Se4 2. Dd3#
1. ... c6 2. De3#
1. ... Sc3 2. Lxc3#
1. ... Sb4 2. c3#
play all play one stop play next play all
BS Problemid: 18463
Authors: Petrovici, Valeriu
Sources:
Years: 1988
Henrik Juel: C+ Popeye 4.61 (2020-10-05)
comment
Keywords: Brian Stephenson Collection (18463), White correction, Gegenschach, Checking key, Sacrifice key
Genre: 2#
FEN: K7/2p5/3P4/B3R1N1/3k1P2/1P3pQb/n1P2n1P/6bq
Input: Brian Stephenson, 2004-08-12
Last update: Felber, Volker, 2020-10-05 more...
4 - P1119196
Michel Meynsbrughen

P1119196
(4+1)
#2
1. Tg2+! Kc1 2. Dc2#
1. ... Ke1,Kd1 2. Db1#
1. ... Ke3 2. De4#
1. ... Kc3 2. Dd3#
play all play one stop play next play all
SCHRECKE: vergleiche: P1166359, P1143563 (2020-11-24)
Henrik Juel: C+ Popeye 4.61 (2020-11-24)
comment
Keywords: Miniature Collection (0003415), Checking key, Aristocrat
Genre: 2#
FEN: 8/8/6Q1/K1N5/8/6R1/3k4/8
Input: Felber, Volker, 2010-09-11
Last update: Rainer Staudte, 2020-11-24 more...
5 - P1233076
Mirko Degenkolbe
Steven B. Dowd

4705 Freie Presse (Chemnitz) 06/08/2009
nach N. Sinowjew
P1233076
(4+3)
#12
1. Sf8-g6+! hxg6 2. Lxg6 Kg8 3. Se6 Kh8 4. Kb4 Kg8 5. Kc5 Kh8 6. Kd6 Kg8 7. Ke7 Kh8 8. Sf8 Kg8 9. Lh7+ Kh8 10. Kf7 g6,g5 11. Lg8 g5,g4 12. Sf8-g6#
play all play one stop play next play all
Meeraner, Urform, Themafiguren: wS + wS
Felber, Volker: Nach N. Sinowjew (= P1171826) auf Bitte der Autoren am 17.09.2009 hinzugefügt (wie in der Lösungsbesprechung vom 03.09.2009 vorgeschlagen). (2014-10-13)
SCHRECKE: C+, Gustav 4.1d, Brute Force (2020-11-02)
comment
Keywords: Meerane-Thema, Checking key, Sacrifice key, Miniature, Corner mate, Model mate
Genre: n#
FEN: 5N1k/5Bpp/8/8/3N4/K7/8/8
Input: Frank Müller, 2012-02-22
Last update: Gunter Jordan, 2019-07-11 more...
6 - P1328162
Yuri Paramonov
6610 Seven Chess Notes (131) 12/2016
2. Lob
P1328162
(4+3) C+
s#10
1. Dxf3+ Kc5 2. Dc3+ Kd6 3. Dd4+ Ke6 4. Dd5+ Kf6 5. Tf7+ Kg6 6. Le4+ Kh6 7. Dd6+ Kh5,Kg5 8. Tf5+ Kh4,Kg4 9. Df4+ Kh3 10. Lg2+ Dxg2#
1. ... Kd6 2. Df6+ Kc5 3. De5+ Kc4 4. Dd5+ Kc3 5. Tb3+ Kc2 6. Le4+ Kc1 7. Dc5+ Kd1,Kd2 8. Td3+ Ke1,Ke2 9. De3+ Kf1 10. Lg2+ Dxg2#
play all play one stop play next play all
more ...
comment
Keywords: Capture key, Checking key
Genre: s#
Computer test: Gustav 4.1d, Brute Force
FEN: q7/1R3Q2/2k5/8/8/5p2/6B1/7K
Input: Frank Müller, 2016-12-02
Last update: Alfred Pfeiffer, 2020-10-14 more...
7 - P1360528
Petre Stojoski
The Macedonian Problemist 57a 09-12/2018
Zoran Gavrilovski 50 JT Abt. H#>2
1. ehrende Erwähnung
PR Hans Gruber
P1360528
(2+13) C+
h#5
1. Se5-c4+ Kb2-c1 2. Kd6-e7 La1xd4 3. Lh2-c7 Ld4-g7 4. Sc4-e5+ Kc1-b2 5. Ke7-d6 Lg7-f8#
play all play one stop play next play all
Stefan Felber: Illegale Bauernstellung! (2019-02-02)
Viktoras Paliulionis: Possible correction: bBd7.
Also, the BQ can be replaced with a BR. (2020-10-08)
comment
Keywords: Illegal position, Checking key, Minimal, Model mate, Klasinc theme (K-L, s-L, s-l, k-l), Switchback (Kks), Selfblock, Line closing, Line closing, Bivalve
Genre: h#
Computer test: Popeye 4.67
FEN: 8/3p4/2qkp3/3pn3/pp1p4/1p1r4/pK5b/B7
Input: Marcin Banaszek, 2019-02-02
Last update: Gunter Jordan, 2019-05-16 more...
8 - 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...
9 - P1373415
Noam D. Elkies
chess.stackexchange.com 12/3/2020
P1373415
(6+11)
#20
1. Sg5+! hxg5 2. Kf3 Kh6 3. Kg2 Kh7 4. Kxh1 Kh6 5. Kg2 Kh7 6. Kf3 Kh6 7. Ke4 Kh7 8. Kd5 Kh6 9. Kc6 Kh7 10. Kb7 Kh6 11. Kxa7 Kh7 12. Kxa6 Kh6 13. Kxa5 Kh7 14. Kxa4 Kh6 15. b4 Kh7 16. b5 Kh6 17. b6 Kh7 18. b7 Kh6 19. b8=D Kh7 20. Dh2#
19. ... Lh7 20. Df8#
play all play one stop play next play all
https://chess.stackexchange.com/a/28841/15543
James Malcom: This is a wildly original problem as far as I can tell. Any anticipations or similar problems? (2020-03-14)
Gerald Ettl: 19.-Lh7 20.Df8#,Dh2# unbedeutender Dual. (2020-03-15)
Olaf Jenkner: Kein Dual, weil 19 ... Lh7 nicht die Drohung Dh2# pariert. (2020-03-15)
Gerald Ettl: Ich bezog mich auf das Wort -Dual- auf den ogigen Kommentar. (der jetzt geloescht ist) (2020-11-18)
Gerald Ettl: Ja, es ist kein Dual. (2020-11-18)
comment
Keywords: Checking key, Excelsior, Sacrifice key, Promotion
Genre: n#
FEN: 6bn/p4p1k/p4Ppp/p7/p3K1P1/P4N2/1P6/7n
Input: James Malcom, 2020-03-14
Last update: Alfred Pfeiffer, 2020-03-14 more...
10 - P1378051
Sergey Smotrov
FIDE World Cup 8th 07/2020
Lob e.a.
P1378051
(4+8) C+
s#12
1. Tf6+! Ke7 2. Tf8+ Kd6 3. Df6+ Kd7 4. De7+ Kc6 5. Tf6+ Kb7 6. De4+ c6! 7. Db1+ Kc7 8. Tf7+ Kd6 9. Dg6+ Ke5 10. Df5+ Kd6 11. Dd7+ Ke5 12. Dd5+ cxd5#
play all play one stop play next play all
Judge Aleksandr Azhusin
more ...
comment
Keywords: Checking key
Genre: s#
Computer test: A. Baumann: Gustav 4.1 d
FEN: brr5/p1p2R2/p2k4/5QB1/2K5/8/8/4n3
Input: Marcin Banaszek, 2020-07-20
Last update: Olaf Jenkner, 2020-11-23 more...
11 - 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...
12 - 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...
13 - 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...
14 - 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...
15 - 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...
16 - 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...
17 - 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...
18 - 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: Alfred Pfeiffer, 2020-09-22 more...
19 - 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...
20 - P1380160
James Malcom
chessproblem.net 14/10/2019
nach György Paros
P1380160
(5+6) C+
h#3
1. Lc7+! Kxc7 2. Da6 Kd6 3. 0-0-0+ Sd7#
play all play one stop play next play all
See P0533854

https://www.chessproblem.net/viewtopic.php?f=7&t=60&p=2362
more ...
comment
Keywords: Belen Theme ("Reversed"), Checking key, Castling
Genre: h#
Computer test: popeye 4.85
FEN: rbK1k3/qp6/1p6/1PN5/8/8/4P3/2R5
Input: James Malcom, 2020-09-22
Last update: Alfred Pfeiffer, 2020-09-22 more...
21 - P1380202
Thomas Hanusch
Mirko Degenkolbe

1538 Mat Plus 37-38 2010
P1380202
(5+7) C+
#12
1. Lxd2+! Kxd2 2. Dd4+ Kc1 3. Sf4 Lc4 4. Sfe2+ Lxe2 5. Sxa2+ Kb1 6. Sc3+ Kc1 7. Sxe2+ Kb1 8. Sc3+ Kc1 9. Kf4 Sd2 10. Dg1+ Sf1 11. Dxf1+ Kd2 12. Se4#
play all play one stop play next play all
more ...
comment
Keywords: Capture key, Checking key
Genre: n#
Computer test: SCHRECKE: C+, Gustav 4.1d, Brute Force (2020-09-24)
FEN: 6b1/8/8/6K1/7Q/2N5/pppp2N1/2k1Bn2
Input: Felber, Volker, 2020-09-23
Last update: Felber, Volker, 2020-11-17 more...
22 - P1380294
Rudolf Reussel
Illustrierte Kronen Zeitung 27/12/1933
P1380294
(10+10) cooked
#29
1. Th2+! Kf3 2. Tf2+ Kg4 3. Tf4+ Kh5 4. Th4+ Kg6 5. Th6+ Kf7 6. Tf6+ Ke8 7. Tf8+ Kd7 8. Td8+ Kc6 9. Td6+ Kb5 10. Tb6+ Kc4 11. Tb4+ Kd3 12. Td4+ Kc2 13. Td2+ Kb3 14. Ta3+ Kc4 15. Td4+ Kb5 16. Tb4+ Kc6 17. Tb6+ Kd7 18. Td6+ Ke8 19. Td8+ Kf7 20. Tf8+ Kg6 21. Tf6+ Kh5 22. Th6+ Kg4 23. Th4+ Kf3 24. Tf4+ Kg2 25. Tf2+ Kg1 26. Th2+ Kxf1 27. Tf2+ Kg1 28. Ta1+ e1=D,T,L,S 29. Txe1#
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Der Führer der schwarzen Heerscharen ist im Verlauf des Kampfgetümmels von seinen Getreuen getrennt worden und befindet sich nunmehr zu seinem Entsetzen inmitten seiner blutgierigen Feinde. Tollkühn zieht der Held sein Schwert, um sich den Rückweg zu den Seinen zu erkämpfen. Da wird er von hinten von einem schwer bewaffneten Ritter angefallen, der, auf einem weißen Mustang reitend, die edle Beute lebend fangen will. Das Königspferd bekommt die Sporen und nun entspinnt sich folgende Hetzjagd auf Leben und Tod:
1. Th2+ Kf3 2. Tf2+ Kg4 3. Tf4+ Kh5 4. Th4+ Kg6 5. Th6+ Kf7 6. Tf6+ Ke8.
Mit keuchendem Atem flüchtet der König in bebuschtes Terrain ...
7. Tf8+ Kd7 8. Td8+ Kc6, doch auch hier findet er keinen Schutz, da ihm sein besser berittener Widersacher stets dicht auf den Fersen ist, 9. Td6+ Kb5 10. Tb6+ ... der ihm den Rückzug zum eigenen Lager blitzschnell verwehrt.
10. ... Kc4 Mit 'verkehrter Direktion' wird die Hetzjagd im Eilzugtempo fortgesetzt.
11. Tb4+ Kd3 12. Td4+ Kc2 13. Td2+ Kb3 14. Ta3+ ...
Der Lanzenstich eines neuen Feindes scheucht den armen Gehetzten nun wieder ins Getümmel der Feldschlacht zurück!
14. ... Kc4 15. Td4+ ... Wo er von seinem alten Verfolger mit Sehnsucht erwartet wird.
15. ... Kb5 16. Tb4+ Kc6 17. Tb6+ Kd7 18. Td6+ Ke8. 'Die hohle Gasse schein´ ich zu kennen, mein Rößlein, laß uns weiter rennen!'
19. Td8+ Kf7 20. Tf8+ Kg6 21. Tf6+ Kh5 22. Th6+ Kg4 23. Th4+ Kf3 24. Tf4+ Kg2. Am alten Standplatz wieder, der König das Schwert in die Erde rammt: 'A so ein Leben ist eh nix mehr wert, habt´s mi gern miteionander, i stürz´ mi ins Schwert!'
25. Tf2+ Kg1 26. Th2+ Kxf1 27. Tf2+ Kg1 28. Ta1+ e1=D 29. Txe1#
Dem Kunax voll Mut und ohne Bangen, ihm ist nun die Puste ausgegangen.!"
Cook: 3. Sh2+! Kxg3! 4. Tg1+ Kh4 5. Tf4+ Kh5! 6. Tf5+ Tg5! 7. Tgxg5+ Kh6 8. Tg1+ Kh7 9. Th5#
3. ... Kh5? 4. Tf5+ Tg5! 5. Txg5+ Kh6 6. Sg4+ Kh7 7. Sf6+ Kh8,Kh6 8. Txg8#
Motto: "Schön is so a Ringelspiel! Oder: 'Man steigt nach!'"
Diagramm und glossierte Lösung ohne konkrete Forderung abgedruckt (#29 muß also nicht stimmen)
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comment
Keywords: Allumwandlung, unechte schwarze, Checking key
Genre: n#
FEN: qbN3b1/1pn1P1r1/8/4K3/p7/2P1B1Pp/1P2p1k1/R4N1R
Input: Mario Richter, 2020-09-26
Last update: Alfred Pfeiffer, 2020-10-02 more...
23 - P1380313
Michal Hlinka
Lubos Kekely

19141 Schach 01/2020
P1380313
(7+8)
Remis
1. Tf2+! Kh1 2. Tf1 Sf5+! 3. Texf5 exf5 4. Lf3+! exf3 5. Kxf3 Dxb3+ 6. Le3+ Kh2 7. Tf2+ Kg1 8. Tb2+ Kf1 9. Tf2+! Ke1 10. Te2+! Kd1 11. Td2+ Ke1 12. Te2+ Sxe2 patt
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comment
Keywords: Checking key
Genre: Studies
FEN: 8/6n1/p3p3/P3R3/4p3/qP2K2p/6k1/2nB1RB1
Input: Marcin Banaszek, 2020-09-26
Last update: Marcin Banaszek, 2020-10-05 more...
24 - P1380327
Sergey Smotrov
S0825 StrateGems SG92 10-12/2020
P1380327
(5+5)
s#14
1. Ta7-a8+! Kd8-c7 2. Db5-c4+ Kc7-b6 3. Dc4-b4+ Kb6-c7 4. Sd6-b5+ Kc7-b6 5. Ta8-b8+ Kb6-a6 6. Lh1-b7+ Ka6-b6 7. Lb7-d5+ Kb6-a6 8. Tb8-a8+ Ka6-b6 9. Sb5-d6+ Kb6-c7 10. Db4-c4+ Kc7-b6 11. Dc4-b5+ Kb6-c7 12. Ta8-a7+ Kc7-d8 13. Db5xe8+ Lh5xe8 14. Ta7-d7+ Le8xd7#
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Henrik Juel: Popeye 4.61 with 'opt non 0 1' found no flaws (2020-09-27)
comment
Keywords: Checking key
Genre: s#
FEN: 3kn2n/R7/3NK3/1Q5b/8/8/8/b6B
Input: Marcin Banaszek, 2020-09-27
Last update: Alfred Pfeiffer, 2020-10-07 more...
25 - P1380329
Stanislaw E. Bogdanowitsch
Problemist of Ukraine 2010
P1380329
(9+6) C+
#6
1. Se6+? Kg8! 2. Se7+ Kf7 3. Sd8+ Kf8 4. Se6+ Kf7
2. f7+? Kh8!

1. Da3+! Txa3 2. Se6+ Kg8 3. f7+ Kxf7 4. Sd6+ Ke7 5. c8=S+ Kd7 6. b8=S#
1. ... Kg8 2. Se7+ Kf8 3. Sxg6+ Kg8 4. Df8#
3. ... Ke8 4. De7#
2. ... Kh8 3. Sf7#
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comment
Keywords: konsekutive Umwandlungen 2 (SS), under-promotion (SS), Checking key
Genre: n#
Computer test: Gustav 4.1d, Brute Force
FEN: 2NN1k2/1PP4p/5Pp1/3PP2q/8/5r2/3r4/Q5K1
Reprints: Schach , p. 73, 10/2020
Input: Rainer Staudte, 2020-09-27
Last update: James Malcom, 2020-09-27 more...
26 - 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#
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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."
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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...
27 - P1380493
Bosko Miloseski
M1651 StrateGems SG90 04-06/2020
P1380493
(6+8) C+
#14
1. Ta8xa3+! Ka1-b1 2. Sf2-d1 e5xd4 3. Ta3-a4 e3-e2 4. Ta4xd4 e2xd1=D 5. Lb3xd1 Ka1,Ka2 6. Td4-a4+ Kb1 7. Ta4-a8 d5-d4 8. Kb8-a7 Ka1,Ka2 9. Ka7-b6+ Kb1 10. Kb6-a5 Ka1,Ka2 11. Ka5-b4+ Kb1 12. Kb4-a3 Kb1-a1 13. Ka3-b3+ Ka1-b1 14. Ld1-c2#
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comment
Keywords: Capture key, Checking key
Genre: n#
Computer test: Gustav 4.1d, Brute Force
FEN: RK6/8/8/3pp3/3P4/pB1Pp3/1p1p1N2/k1b5
Input: Marcin Banaszek, 2020-09-30
Last update: Alfred Pfeiffer, 2020-10-08 more...
28 - P1380523
Nels H. Nelson
760 Los Angeles Times , p. 30, 28/3/1937
"April Fool Joke"
P1380523
(9+5)
#3
1. gxh6ep+! Kxf7 2. 0-0xg1! Sf6 3. e8=sS#!
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28/3/1937-https://www.newspapers.com/clip/25408700/chess-by-herman-steiner/

"NELS NELSON

We have heretofore published many of Nelson's fine problems and should like to show any readers the more humorous side of his talent. This winter our distinguished friend is spending his vacation in Los Angles. It is with his kind permission that we are publishing this story and problem.

Nels Nelson, born in Denmark in 1871, emigrated to the United States when 12 years of age. He learned the moves of chess in Denmark and began solving and composing problems in 1894. He was chess editor of the Minneapolis State Chess Asccostion, 1911-1912, president of the Minnesota State Chess Asccostion, 19229-1930, and lives at Hopkins, Minn., a suburb of Minneapolis.

AN APRIL FOOL JOKE

A certain celebrated chess master, who we will designate as Mr. "X," while on in the provinces happended into a tavern which was the mecca of the village chess players. Mr. "X," very fond of practical jokes, concieved a plan of sprining on one of the unsuspecting natives. Professing ignorance of the game, the champion of the club offered to teach Mr. "X" its intricacies. After showing Mr. "X' all of the moves with the exception of pawn promotion, pawn takes pawn, etc., and castling, the champion said the following: ""I have purposely ommited three of the manuvers in chess, which to the beginner are somewhat difficult to grasp. They are pawn promotion-when a pawn reaches the eigth rank it ceases to be a pawn but may but it may be converted to any piece on the board and assumes its function at once. It it thus theortically possible to have as many as nine queens on the board at once, and so on down the line." The champion then went to explain the castling on the king and queen side and emphasised the importance of moving the king first. The act of pawn takes pawn "en passant" was then throughly explained and the actual game started with the champio givng odds of queen to Mr. "X," who proved to be a very apt pupil! Mr. "X" lost the first game in short order-walking boldy into a mating net. In the second game he gave the champion quite the battle and won the approbation of that was worthy. In the third game, the champion managed to trap Mr. "X's" queen but had to give up two pieces for it and saw that he had a lost game but continued on in the hope that his expierenced opponent would make some mistake. When the game has reached the postion in the diagram the champion was dumbfounded to hear Mr. "X" announce mate in three moves. "Impossible!" exclaimed the champion. "You should win, of course, but mate in three cannt be done." "Well, if you have interpreted the move and rules correctly, I am certain I see a mate in three," said Mr. "X." "Of course I have interpreted the rules correctly, exclaimed the now irate champion: and I will lay you a wager of dinner for the members of the club that you fail to mate in three moves." "Done!" cried Mr. "X." By this time nearly ever member in the clubwas watching the game with interest. Now, who won this wager? It will be shown in the solution April 11."

11/4/1937-https://www.newspapers.com/clip/25408721/chess-by-herman-steiner/

"SOLUTION TO PROBLEM 760 by N. Nelson: "April Fool Joke."

White: K. on K1 R. on Q7, and KR1: Kt. on KB7 and KB8: B, on QB5: P. on K7, KKt5, and KKt2, Black: K. on KKt2: R. on KKt1: Kt. on K1: B. on KKt8: P. on KR4. (Wh. 9: BL. 5.)

Many members of the club were very fine players and felt their champion would win. Curiously, most of them were pulling for mr. "X," as the champion was somewhat of a braggard and if he won they felt they wouls be hearing about it for a long time. They were, therfore, keenly alert when Mr. "X" started to proceed the game. "My first move is pawn takes en passant," said the smiling Mr. "x." "Of course, I anticipated that move," replied the champion, "and I shall meet it with king takes knight." Oh well then I shall make for my second move, castle: taking the bishop," continued Mr. "X." "This move is according to your definition of castling, perfectly legitimate, as the king moves first, and the bishop being on the knight squar, certainly is subject to capture." "Well," replied the champion, "I must say your interpretation is far fetched, but I will grant you even this point as I fail to see how you mate on the next move: you evidently overlook the fact that when you promote the pawn the king will be able to capture it. Of course, I am forced to interpose my knight and it is pinned, but the king will still be able to take care of that promoted pawn. " Well," smiled Mr. "X," "I shall, however, mate you by pawn to king eight, discovering check, as I shall claim a black knight for the promoted pawn, which, according to your interpretation of pawn promotion, is perfectly legitimate. You stated I might choose any piece on the board and, of course, as the black knight is the only piece that will mate, I naturally selected it."
Exit champion.

We are publishing the best solution sent in my Ladderite L. A. Post, incidentally only two others solved this April Fool Problem.

Problem 760 to complete the tale that Mr. Nelson started to what I believe to be the logical solution according to the rules given by the local champion.
1. White: Pawn takes pawn "en passant" check.
The local champion then captured the white knight reposing on his "bishop two."
1. Black: king takes knight.
"Now," continued Mr. "X" "I understand to quote you, the king moves firstl in castling."
"That is correct," agreed the champion.
Thereupon Mr. "X" executed the move in the prescribed manner by first moving his king to his king knight square and removing the champion's bishop and then setting his rook down on his king bishop square calling check.
The champion was nonplussed, for in stating the rules for "castling" he had failed to forsee a circumstance of this kind. He was forced to admit that, according to his own statement, such a move was possible But seeing in spite of this that it was still impossible to checkmate on the next move, he conceded the point and interposed his knight.
2. Black: Knight to king bishop three.
"Did you not say," resumed Mr. "X," "that in 'pawn promotion' you could reclaim to any piece on the board?"
"That is correct," conceded the champion, "but since you insist on taking me literally I might add that there is no "queen' on the board you may claim in one."
"In that case," stated Mr. "X," "I will be equally generous and present you with a 'knight.'"Whereupon Mr. "X" removed the pawn at king seven and placed a black 'knight' at king eight discovring checkmate to the champion's "king."
"Such a thing is impossbile !" cried the outraged champion.
"Not at all," replied Mr. "X," "for according to your statement that "upon reaching the eight rank a pawn be converted to any piece on the board and assumes its function at once.'"
To this the other members agreed. So the champion held a dinner in honor of Mr. "X," the most apt pupil he had ever taught.

Resepctfully yours,

L.A. Post
Seaman, First Class, U.S. Navy,
U.S..S Texas, San Pedro, Cal."
Henrik Juel: Some help is needed here, James
At least for me (2020-10-01)
A.Buchanan: Hi Henrik I am guessing it’s a cheatyface Valladao:
1. gxh6ep+ Kxf7 2. 0-0+ Sf6 3. f8=sS#
No proof for the ep, castling with capture and promotion to black officer (2020-10-02)
James Malcom: Bingo Andrew! (2020-10-02)
Henrik Juel: Even though I ought to stand by my fellow danish author:
This is a most crude 'joke' problem, especially the 'castling' with capture (2020-10-02)
A.Buchanan: It's kind of a running gag: three silly jokettes which do combine relatively harmoniously (2020-10-02)
A.Buchanan: 1. ... Kf6 allows a short mate, robbing White of the Valladao. 4nNbn/3RP1kN/8/6Pp/8/8/8/4K1bR is the best I can find, fixing the problem, and with less material (2020-10-02)
A.Buchanan: I was hoping that someone would spot that I have shifted a unit to h7 - i.e. the e.p. is even more Foolish :-) I claim it "improves" the problem because currently the e.p. *might* be legal :-) If this is too crude for some, then 4nNr1/3RP1k1/6N1/4P1Pp/8/8/8/4K1bR works. Note you need sTg8 to prevent 2. Sh8#, but wSg6 is blocking g-file, so wBg2 is still free to find other duties on e5. (2020-10-03)
James Malcom: Excellent improvements, Andrew! (2020-10-06)
A.Buchanan: Thanks James: do you think the one with Sh7 is excessively silly? (2020-10-06)
James Malcom: Yes, 'd say a bit too silly. (2020-10-16)
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comment
Keywords: Joke, Valladao Task, Joke promotion (s), En passant as key, Castling, Checking key, under-promotion (s)
Genre: 3#
FEN: 4nNr1/3RPNk1/8/2B3Pp/8/8/6P1/4K1bR
Reprints: Los Angeles Times , p. 13, 11/4/1937
Input: James Malcom, 2020-10-01
Last update: Alfred Pfeiffer, 2020-10-16 more...
29 - P1380824
Sergey Smotrov
1374 Rochade Europa 05/1997
P1380824
(5+11)
s#19
1. Lxg6+? Sxg6+ 2. Kc7!
1. Lf5-g4+! Kh5-h4 2. Le3-f2+ Kh4-g5 3. Lg4-e6+ Kg5-h5 4. Tg2-h2+ Kh5-g5 5. Lf2-h4+ Kg5-h5 6. Lh4-e1+ Kh5-g5 7. Th2-g2+ Kg5-h5 8. Le6-g4+ Kh5-g5 9. Lg4-e2+ Kg5-f5 10. Tg2-f2+ Kf5-g5 11. Td4-g4+ Kg5-h5 12. Tg4xc4+ Kh5-g5 13. Tc4-g4+ Kg5-h5 14. Tg4-d4+ Kh5-g5 15. Tf2-g2+ Kg5-f5 16. Le2-g4+ Kf5-g5 17. Le1-h4+ Kg5xh4 18. Lg4-f5+ Kh4-h5 19. Lf5xg6+ Se7xg6#
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Henrik Juel: Popeye 4.61 with 'opt non 0 1 thr 0' found no flaws (2020-10-11)
comment
Keywords: Logical Problem, Switchback (TTL, k), Line opening, discovered checkmate, Batteriematt diagonal, Battery creation, Discovered check, Checking key, Perpetual check
Genre: s#
FEN: 5q2/3pn3/1n1K1ppp/b4B1k/2pR4/4B3/6R1/2r5
Input: Marcin Banaszek, 2020-10-11
Last update: Gunter Jordan, 2020-10-11 more...
30 - P1380894
Wilfried Neef
18066 Die Schwalbe 301, p. 447, 02/2020
P1380894
(10+10) C+
#13
1. Sd1+! Kd3 2. Sf2+ Ke3 3. Sh1 Kd3 4. Lxb4 Ke3 5. Lc3 Kd3 6. Le1 Ke3 7. b4 Kd3 8. Sf2+ Ke3,Kc4 9. Sd1 Kd3 10. Lc3 Kc4 11. Ld2 Kd3 12. Le1 Kc4 13. Sb2#
play all play one stop play next play all
Aus der LB: 'Der Autor schreibt zu seiner Aufgabe, dass das Schema auf seinen ersten veröffentlichten Mehrzüger zurückgeht.'. = P1380895
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comment
Keywords: Checking key
Genre: n#
Computer test: Gustav 4.1d, Brute Force
FEN: 1n6/3p4/p1pPp3/PpP1Kp2/1p1N1Pp1/1P2k1P1/1N6/4B3
Input: Felber, Volker, 2020-10-14
Last update: Alfred Pfeiffer, 2020-10-14 more...
31 - P1381070
James Malcom
SuperProblem (Website) 09/04/2020
P1381070
(10+5) C+
s#8
1. Ta1+! Kg2 2. Tb2+ Kf3 3. Ta3+ Ke4 4. Tb4+ Kd5 5. Ta5+ Kc6 6. Tc4+ Kb7 7. Tc7+ Kxa8 8. Ke7+ Dxf8#
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7 square route of the Black king

http://superproblem.ru/archive/probl/Sn/Malcom-s8-2020.gif
Olaf Jenkner: wBg3, +wPh2 you get a model mate (2020-10-18)
A.Buchanan: Can one begin with wTa3b3 so there is a genuine try 1. Tb1? (2020-10-19)
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comment
Keywords: corner to corner, Checking key
Genre: s#
Computer test: Gustav 4.1d, Brute Force
FEN: N3KQqr/P2P4/3BP3/5P2/6p1/1R5p/R7/7k
Input: James Malcom, 2020-10-17
Last update: A.Buchanan, 2020-10-20 more...
32 - P1381075
Jozef Holubec
F211 SuperProblem (Website) 07/04/2020
P1381075
(7+4) C+
s#10
1. Sbd1+! Kc7 2. Txf7+ Kc6 3. Dxc4+ Kd6 4. De6+ Kc5 5. Tc7+ Kd4 6. Sc2+ Kd3 7. Td7+ Kxc2 8. Dg6+ Te4 9. Dc6+ Tc4 10. Da4+ Txa4#
1. ... Ka8 2. Dd8+ Ka7 3. Txf7+ Ka6 4. Dd6+ Ka5 5. Tf5+ Ka4 6. Sb2+ Kb3 7. Tb5+ Kc3 8. Sbd1+ Txd1 9. T5b3+ cxb3 10. Tc1+ Txc1#
play all play one stop play next play all
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comment
Keywords: Checking key
Genre: s#
Computer test: Gustav 4.1d, Brute Force
FEN: 8/1k3b2/5R2/8/2pQ2B1/4N3/1N6/KR2r3
Input: Marcin Banaszek, 2020-10-17
Last update: Alfred Pfeiffer, 2020-10-19 more...
33 - P1381103
Ferhat Karmil
Problemist of Ukraine 2020
3. Preis
Stanislaw-Kirilitschenko-Memorial
P1381103
(4+3) C+
#5
1. Sxc2? d1=S! 2. Ka6 S~ 3. Sc5#
1. Tc4+? Ka3 2. Ta4+ Kb2!

1. Ta2+! Kb4 2. Ta4+! Kxa4 3. Sc2! d1=S! 4. Ka6 Sd4 5. Sc5#
4. ... Se3 5. Sc3#
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comment
Keywords: Checking key
Genre: n#
Computer test: Henrik Juel: C+ Popeye 4.61 (2020-10-18
FEN: 8/8/1K6/8/k3N3/1n6/2Rp4/N7
Input: Rainer Staudte, 2020-10-18
Last update: Alfred Pfeiffer, 2020-10-21 more...
34 - P1381246
Juan Carbo y Batlle
3 La Corona (Barcelona) 30/09/1860
P1381246
(8+6) C+
#4
1. Ta6+! bxa6 2. b3+ Ka5 3. Sc6+ Txc6 4. Lc3#
play all play one stop play next play all
more ...
comment
Keywords: Checking key
Genre: n#
Computer test: Gustav 4.1d, Brute Force
FEN: r1r4B/pp5q/5R2/2P1N3/k1P5/3N4/KP6/8
Input: Mario Richter, 2020-10-23
Last update: Alfred Pfeiffer, 2020-10-23 more...
35 - P1381247
Juan Carbo y Batlle
6 La Corona (Barcelona) 27/10/1860
P1381247
(8+2)
#4
1. Te1+ Kxd5 2. Le5 hxg2 3. Sg6 g1=D 4. Se7#,Sf4#
play all play one stop play next play all
Scan undeutlich, Feld c6 und a2 nicht sicher
Henrik Juel: Mate dual, also 4.Sf4# (2020-10-23)
comment
Keywords: Checking key, Allumwandlung, unechte schwarze
Genre: n#
FEN: 7N/8/8/1K1R1P2/4k3/7p/P5PB/R7
Input: Mario Richter, 2020-10-23
Last update: Alfred Pfeiffer, 2020-10-23 more...
36 - P1381249
Avelino Conte
8 La Corona (Barcelona) 17/11/1860
P1381249
(7+5)
#4
1. bxc6+! Lc5 2. Le5 Td7 3. Lg6 Txa7,~ 4. Le4#
Co-Dual 3. Lh5 Txa7,~ 4. Lf3#
play all play one stop play next play all
SCHRECKE: Verschiebt man die Stellung um 1 nach rechts, ist alles in Ordnung! (2020-10-23)
comment
Keywords: Capture key, Checking key
Genre: n#
FEN: 8/N4B2/2prp3/RP1k4/5P2/b1BK4/8/8
Input: Mario Richter, 2020-10-23
Last update: Alfred Pfeiffer, 2020-10-23 more...
37 - P1381269
Grigory Popov
SuperProblem (Website) 24/10/2020
P1381269
(9+10) C+
#13
1. a4+! Kc5 2. b4+ Kd5 3. c4+ Ke5 4. d4+ Kf5 5. e4+ Kg5 6. Tg4+ Kh5 7. Ta5+ b5 8. Txb5+ c5 9. Txc5+ d5 10. Txd5+ e5 11. Txe5+ f5 12. Txf5+ g5 13. Tfxg5#
play all play one stop play next play all
Record of 5+6 pawn double-steps

http://superproblem.ru/archive/probl/N/Popov-13-2020.gif
A.Buchanan: The final move "Txg5#" was now correctly marked as an error, because it was ambiguous. Thanks Gerd! (2020-11-14)
more ...
comment
Keywords: Construction task, Construction record, Checking key
Genre: n#
Computer test: Gustav 4.1d
FEN: 1N3n2/1pppppp1/R6r/1k6/7R/5K2/PPPPP1n1/8
Input: James Malcom, 2020-10-24
Last update: A.Buchanan, 2020-11-14 more...
38 - P1381270
James Malcom
SuperProblem (Website) 24/10/2020
P1381270
(11+10)
#6
1. b4+! e5 2. dxe6ep Kg6 3. c4+ f5 4. Lxf5+ Kh6 5. d4+ g5 6. Lxg5#
play all play one stop play next play all
3 pairs of pawn double-steps by White and Black

http://superproblem.ru/archive/probl/N/Malcom-6x-2020.gif
Henrik Juel: Slightly damaged by late duals after 2... Dd4 (2020-10-24)
James Malcom: But those are irrelevant, Henrik. (2020-10-24)
comment
Keywords: En passant, Checking key
Genre: n#
FEN: 4nK2/q1N1pppr/b4k2/3P4/r5P1/p6N/1PPP4/QBB5
Input: James Malcom, 2020-10-24
Last update: Alfred Pfeiffer, 2020-10-24 more...
39 - P1381288
James Malcom
SuperProblem (Website) 25/10/2020
P1381288
(7+11) C+
s#8
1. Ta5+! b5 2. Txb5+ c5 3. Txc5+ d5 4. Txd5+ e5 5. Txe5 f5 6. Txf5+ g5 7. Tgxg5+ hxg5 8. g4+ Dxg4#
play all play one stop play next play all
Record of 1+6 pawn double-steps by White and Black

http://superproblem.ru/archive/probl/Sn/Malcom-s8-2020-1.gif
more ...
comment
Keywords: Construction task, Construction record, Checking key
Genre: s#
Computer test: SCHRECKE: C+, Gustav 4.1d, Brute Force (2020-10-25)
FEN: 4n1NN/1pppppp1/R6p/7k/6R1/7K/5pPP/6q1
Input: James Malcom, 2020-10-25
Last update: Alfred Pfeiffer, 2020-10-26 more...
40 - P1381354
Udo Marks
1741 Rochade Europa 04/1998
Dem Schachklub Gronau/Leine nachträglich
zum 10jährigen Bestehen gewidmet
P1381354
(9+14) C+
#5
Duplex
w) 1. Dd7-f5+! Kf7-g8 2. Df5xc8+ Kg8-h7 3. Dc8-h8+ Kh7-g6 4. Dh8-h5+ Kg6-f6 5. Dh5-f5#

s) 1. ... Td3-d4+! Ke4-f5 2. g7-g6+ Kf5-g5 3. Ld6-f4+ Kg5-h4 4. Tc8-h8+ Tb8xh8 5. Da8xh8#
s) 1. ... Td3-d4+! Ke4-e3 2. Td4-e4+ Ke3-f2 3. Se1-d3+ Kf2-f1 4. Se2-g3+ Kf1-g1,hxg3 5. Te4-e1#
2. ... Ke3xe4 3. Lb5-d3+ Ke4-d5 4. Se2-f4+ Kd5-c6 5. Ld3-b5#
4. ... Kd5-d4 5. Se1-c2#
3. ... Ke4-e3 4. Ld6-c5+ Dd7-d4 5. Lc5xd4#
play all play one stop play next play all
Stefan Felber: Umwandlungsläufer d6! (2020-10-28)
comment
Keywords: Checking key, Obtrusive material
Genre: n#
Computer test: Popeye 4.83
FEN: qRr5/1RpQpkp1/pN1b4/1b6/1p2K1P1/2pr1B2/4n1PP/4n3
Input: Marcin Banaszek, 2020-10-28
Last update: Alfred Pfeiffer, 2020-10-30 more...
41 - P1381378
Anton Baumann
19249 Schach , p. 80, 07/2020
P1381378
(7+8) C+
s#8
Zeroposition
a) wBd3->e4
b) wLd1->h5
a) 1. Lb3+! Kf8 2. Df6+ Ke8 3. c8=T+ Kd7 4. Td8+ Kc7 5. Dd6+ Kb7 6. Ld5+ Ka7 7. Txh8 Se8 8. Txe8
7. ... Se6 8. Dxe6
7. ... Sf5 8. exf5
7. ... Sh5 8. Txh5

b) 1. g4! Kf8 2. Df6+ Kg8 3. c8=D+ Kh7 4. Lg6+ Kh6 5. Lf7+ Kh7 6. Dxh8+ Kxh8 7. Dg6 Se8 8. Lxe8
7. ... Se6 8. Lxe6
7. ... Sf5 8. gxf5
7. ... Sh5 8. gxh5
3. ... Se8 4. Dxe8+ Kh7 5. De4+ Kg8 6. Dxh8+ Kxh8 7. Dg6
play all play one stop play next play all
19.249 (Baumann) a) 1.Lb3+! Kf8 2.Df6+ Ke8 3.c8T+ Kd7 4.Td8+ Kc7 5.Dd6+ Kb7 6.Ld5+ Ka7 7.T:h8 Se8/Se6/Sd5/Sh5 8.T:e8/D:e6/e:f5/T:h5 S matt; b) 1.g4! Kf8 2.Df6+ Kg8 3.c8D+ Kh7 4.Lg6+ Kh6 5.Lf7+ Kh7 6.D:h8+ K:h8 7.Dg6 Se8/Se6/Sf5/Sh5 8.L:e8/L:e6/g:f5/g:h5 S matt, 3… Se8 4.D:e8+ Kh7 5.De4+ Kg8 6.D:h8+ K:h8 7.Dg6 S matt (4 P.). „Die schwarze Springer-Turm-Batterie muss Matt setzen. Der bewegliche sSg7 wird von Weiß geschlagen, so dass wegen Zugzwang der sSg1 Matt setzen muss. Prima“ (KHS).
more ...
comment
Keywords: Checking key, under-promotion (T), Promotion (D)
Genre: s#
Computer test: Gustav 4.1d, Brute Force
FEN: 6kb/2P3n1/6Q1/8/8/p2P2P1/P5pp/K2B2nr
Input: Felber, Volker, 2020-10-29
Last update: Alfred Pfeiffer, 2020-10-30 more...
42 - P1381404
Gennady Koziura
Ivan Soroka

Gravure 2020
1. ehrende Erwähnung
P1381404
(7+3) C+
s#9
1. Td7+! Kc8 2. Tb7+ Kd8 3. Sh7 Ke8 4. Lg6+ Kd8 5. g5 Kc8 6. Lf5+ Kd8 7. Lg4 Ke8 8. Lh5+ Kd8 9. Dg8+ Lf8#
play all play one stop play next play all
more ...
comment
Keywords: Checking key
Genre: s#
Computer test: O. Jenkner: Gustav 4.1 d
FEN: 3k4/7R/1r1b1N1K/B2Q1B2/6P1/8/8/8
Input: Olaf Jenkner, 2020-10-31
Last update: Alfred Pfeiffer, 2020-10-31 more...
43 - P1381405
Aleksandr Azhusin
Gravure 2020
2. ehrende Erwähnung
P1381405
(8+2) C+
s#10
1. Sg5+! Td5 2. Thh8 Kd7 3. Thd8+ Kc6 4. d7 Kc7 5. Se6+ Kc6 6. Te8 Kxd7 7. Te7+ Kc6 8. Sec5 Kd6 9. Se4+ Kc6 10. Sa5+ Txa5#
play all play one stop play next play all
more ...
comment
Keywords: Checking key
Genre: s#
Computer test: Gustav 4.1d, Brute Force
FEN: 1R6/K6R/2kP4/1r6/4N3/BN6/8/7B
Input: Olaf Jenkner, 2020-10-31
Last update: Alfred Pfeiffer, 2020-11-03 more...
44 - P1381409
Valery Surkov
Gravure 2020
3. Lob
P1381409
(4+4) C+
s#11
1. Lb5+! Kb6 2. Ld4+ Ka5 3. Lxc4+ Ka4,Kb4 4. Db5+ Ka3 5. Db2+ Ka4 6. Lb5+ Ka5 7. Lc3+ Kb6 8. Lc4+ Kc5,Kc6 9. Db5+ Kd6 10. De5+ Kc6 11. Dc7+ Dxc7#
play all play one stop play next play all
more ...
comment
Keywords: Checking key
Genre: s#
Computer test: Gustav 4.1d, Brute Force
FEN: 2K5/p6q/B1k5/4Q3/2p5/2B5/8/8
Input: Olaf Jenkner, 2020-10-31
Last update: Alfred Pfeiffer, 2020-11-03 more...
45 - P1381499
James Malcom
chess.stackexchange.com 12/8/2020
P1381499
(6+5) C+
#2
Bosma
1. 0-0+!
1. ... Shxf1 2. Dg4#
1. ... Sgxf1 2. Df2#
1. ... Lxf1 2. Tf2#
play all play one stop play next play all
https://chess.stackexchange.com/a/29992/15543
A.Buchanan: Nice way to combine an orthodox theme with Bosma castling (2020-11-13)
James Malcom: Thanks, Andrew. Castling with check is the easiest way to achieve it of course, not to mention the flight taking. I'll try out a version without check, here soon. (2020-11-13)
comment
Keywords: Joke, Bosma, Castling as key, Checking key, x pieces capture on one square, Flight taking
Genre: 2#
Computer test: C+ WinChloe 3.51
FEN: 8/8/8/5B2/5p1Q/5kn1/2NRb2n/4K2R
Input: James Malcom, 2020-11-03
Last update: James Malcom, 2020-11-13 more...
46 - P1381543
Ivan Soroka
7651 Phénix 268 12/2016
P1381543
(5+2) C+
s#11
1. g7-g8=D+! Kf7-f6 2. Dg8-g4 Kf6-f7 3. Kh7-h8 Kf7-f6 4. Df4-g5+ Kf6-f7 5. Dg5-h5+ Kf7-f6 6. d7-d8=S Sf5-e3,S~ 7. Dg4-f4+ Se3-f5 8. Df4-d6+ Sf5xd6 9. Dh5-e5+ Kf6-g6 10. Te8-g8+ Kg6-h6 11. Sd8-f7+ Sd6xf7#
play all play one stop play next play all
Anton Baumann: C+ Gustav 4.1d (2020-11-11)
comment
Keywords: Promotion in the key, Checking key, under-promotion (S), konsekutive Umwandlungen 2 (DS)
Genre: s#
FEN: 4R3/3P1kPK/8/5n2/5Q2/8/8/8
Input: Marcin Banaszek, 2020-11-04
Last update: Marcin Banaszek, 2020-11-12 more...
47 - P1381558
Milomir Babic
8091 Phénix 279-280 11-12/2017
P1381558
(11+7)
s#11
1. Tb1+! Sxb1 2. Da3+ Sxa3 3. 0-0+ Sb1 4. a8=T+ La7 5. d5+ e5 6. dxe6ep+ Tg7+ 7. Kh1 e2 8. Te1 h5 9. b8=D h4 10. Db7 h3 11. Dg2 hxg2#
play all play one stop play next play all
Henrik Juel: Damaged by the dual 7... h5 8.b8=D,Te1 (2020-11-05)
comment
Keywords: Checking key, Castling, under-promotion (T), Promotion (D), En passant, Pawn mate, Corner mate, Pinning, pin-mate
Genre: s#
FEN: 7B/PPr1p3/7p/2b5/1NNP4/n2Qp3/1R5P/k3K2R
Input: Marcin Banaszek, 2020-11-05
Last update: Gunter Jordan, 2020-11-05 more...
48 - P1381635
Mirko Degenkolbe
8711 Seven Chess Notes 172, p. 19, 06/2020
P1381635
(5+2) C+
s#5*
* 1. ... Lh8xg7#
1. Dg5+! Kf7 2. Dd5+ Kf8 3. Da8+ Kf7 4. De8+ Kf6 5. Dh5 Lh8xg7#
play all play one stop play next play all
Synthese-Meeraner, Themafigur: sL
[MD 1531]
Anton Baumann: gespiegelter Vorgänger von Oleg Paradinski: P1016504 (2020-11-09)
comment
Keywords: Model mate, anticipated (P1016504), Minimal (l), Miniature, Mutate, Meerane-Thema, Checking key, Round Trip (D-5), Flight giving key
Genre: s#
Computer test: Popeye WINDOWS98-32Bit-Version 3.77 (8192KB)
FEN: 7b/6NP/3P1k1K/7Q/8/8/8/8
Input: Felber, Volker, 2020-11-09
Last update: Gunter Jordan, 2020-11-26 more...
49 - P1381642
Milomir Babic
8650 Phénix 301-302 11-12/2019
P1381642
(8+7)
s#11
1. d3-d4+! f7-f5 2. g5xf6ep+ Tg4-g6 3. 0-0+ Lf4-c1 4. Kg1-h1 h5-h4 5. Lg3-h2 h4-h3 6. f6-f7 b5-b4 7. f7-f8=L h6-h5 8. Lf8-d6 h5-h4 9. Lh2-g1 h3-h2 10. Ld6xh2 h4-h3 11. Tf2-g2 h3xg2#
play all play one stop play next play all
SCHRECKE: Nach 4. ... b4 geht 5.Lh2 oder 5.f7 (2020-11-09)
comment
Keywords: Checking key, En passant, Castling, under-promotion (L), Valladao Task, Pawn mate
Genre: s#
FEN: 8/5p1B/7p/1p4Pp/5br1/1N1P2B1/5R2/1k2K2R
Input: Marcin Banaszek, 2020-11-09
Last update: Alfred Pfeiffer, 2020-11-09 more...
50 - P1381646
Milomir Babic
8358v Phénix 301-302 11-12/2019
1. ehrende Erwähnung
P1381646
(12+7) C+
s#9
1. c7-c8=T+! Kc6-d5 2. f7xe8=L b7-b6 3. h7-h8=D b6xc5 4. Dh8-f6 c5xd4 5. Le8-g6 d4-d3 6. Df6-g5 Kd5xd6 7. e7-e8=S Kd6-d5 8. Se8-f6+ Kd5-d6 9. Te1-e6+ d7xe6#
play all play one stop play next play all
Version zu: P1381602
PR Yves Tallec 04-05/2020
SCHRECKE: Das ist ein s#9!
C+, Gustav 4.1d, Brute Force
Umwandlungsläufer sLe8! (2020-11-09)
comment
Keywords: Checking key, under-promotion in the key, Model mate, Selfblock, Allumwandlung, Pawn mate, Obtrusive material, konsekutive Umwandlungen 4 (TLDS)
Genre: s#
Computer test: Gustav 4.1c
FEN: 4b3/1pPpPP1P/2kP4/1pP2K2/1prP4/1B6/3P4/B3R3
Input: Marcin Banaszek, 2020-11-09
Last update: James Malcom, 2020-11-09 more...
51 - P1381764
Daniele Gatti
Best Problems 89, p. 194, 1/2019
P1381764
(12+11)
#22
b) sLa3->b8: s#22
a) 1. Th8+! Kxh8 2. Txh3+ Kg8 3. Th8+ Kxh8 4. Txh2+ Kg8 5. Th8+ Kxh8 6. Th1+ Kg8 7. Th8+ Kxh8 8. Th1+ Kg8 9. Th8+ Kxh8 10. Th1+ Kg8 11. Th8+ Kxh8 12. Th1+ Kg8 13. Th8+ Kxh8 14. Th1+ Kg8 15. Th8+ Kxh8 16. Th1+ Kg8 17. Th8+ Kxh8 18. Dh1+ Kg8 19. Dh7+ Kf8 20. Dh8+ Ke7 21. Dxg7+ Kd6,Kd8 22. Dc7#

b) 1. Th8+! Kxh8 2. Txh3+ Kg8 3. Th8+ Kxh8 4. Txh2+ Kg8 5. Th8+ Kxh8 6. Th1+ Kg8 7. Th8+ Kxh8 8. Th1+ Kg8 9. Th8+ Kxh8 10. Th1+ Kg8 11. Th8+ Kxh8 12. Th1+ Kg8 13. Th8+ Kxh8 14. Th1+ Kg8 15. Th8+ Kxh8 16. Th1+ Kg8 17. Th8+ Kxh8 18. Dh1+ Kg8 19. Dh7+ Kf8 20. Dh8+ Ke7 21. Dxg7+ Kd6,Kd8 22. Dc7+ Lxc7#
play all play one stop play next play all
http://www.bestproblems.it/bppdf/BP2019(complete).pdf

"... details are everything ..."
Henrik Juel: Popeye 4.61 with 'opt thr 0' found no flaws in part a (2020-11-12)
Henrik Juel: ... and with 'opt thr 0 non 0 1' no flaws in part b (2020-11-12)
comment
Keywords: Task (Construction), Non-standard material, Bahnung, Räumung, Checking key
Genre: n#
FEN: q3r1k1/6p1/1K2p1P1/3rp3/7R/b4pRn/5R1p/QRRRRRR1
Input: James Malcom, 2020-11-12
Last update: Rainer Staudte, 2020-11-12 more...
52 - 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...
53 - P1382152
Olivier Schmitt
C11810 The Problemist 27-7, p. 267, 01/2020
P1382152
(6+9) C+
#13
1. Lxd4? Lxd4 2. Sd2 b1=D!
1. Tb5+! Kc6 2. Tb8 Kc5 3. Ka5 Kc6 4. Tb6 Kc5 5. Txb2 Kc6 6. Tb6+ Kc5 7. Tb8 Kc6 8. Ka6 Kc5 9. Tb5+ Kc6 10. Tb6+ Kc5 11. Lxd4+ Lxd4 12. Sd2 ... 13. Sb3#
play all play one stop play next play all
more ...
comment
Keywords: Checking key, Switchback (KT, k), Logical Problem, Rücknahme Schlüsselzug
Genre: n#
Computer test: C+, Gustav 4.1d, Brute Force
FEN: 5n2/3p3r/KR1P4/2kpB3/3p3p/3PbN2/1p6/8
Input: Felber, Volker, 2020-11-19
Last update: A.Buchanan, 2020-11-21 more...
54 - P1382349
Topi Romano
4 L'Album Roma 02/10/1847
P1382349
(8+7)
#3
1. De7+ Dxe7 Tb8+ Dd8 3. Sf6#
play all play one stop play next play all
im 'Album Roma' nicht explizit als Urdruck deklariert
SCHRECKE: C+, popeye 4.85 (2020-11-24)
comment
Keywords: Checking key, Sacrifice key, Switchback (d), pin-mate
Genre: 3#
FEN: 3qk2r/3p1p2/4p3/7r/1Q2N3/B7/1R2PPP1/5K2
Input: Mario Richter, 2020-11-24
Last update: Gunter Jordan, 2020-11-24 more...
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The problems of this query have been registered by the following contributors:

Gerd Wilts (1)
Selbstmatt-Miniaturen/Reflexmatt-Miniaturen (1)
Brian Stephenson (1)
Felber, Volker (7)
Frank Müller (2)
Marcin Banaszek (12)
James Malcom (20)
Mario Richter (5)
Rainer Staudte (2)
Olaf Jenkner (3)